Trane Rt Prc007 En User Manual
Packaged Rooftop  
Air Conditioners  
27 ½ to 50Ton - 60 Hz  
Voyager™ Commercial  
October 2001  
RT-PRC007-EN  
Contents  
Introduction  
2
4
Features and Benefits  
Application Considerations  
10  
12  
Selection Procedure  
Model Number Description  
General Data  
14  
15  
Performance Data  
Performance Adjustment Factors  
Controls  
19  
18  
28  
Electric Power  
32  
34  
41  
Dimension and Weights  
Mechanical Specifications  
RT-PRC007-EN  
3
Features and  
Benefits  
Standard Features  
• Factory installed and commissioned  
Optional Features  
• Electric heat  
microelectronic controls  
• Natural gas heat  
• LP gas heat (kit only)  
• Power Exhaust  
• Barometric Relief  
• Trane 3-D™ Scroll Compressors  
• Dedicated downflow or horizontal  
configuration  
• CV or VAV control  
• FROSTAT™ coil frost protection on all  
units  
• Supply air overpressurization  
protection on VAV units  
• Supply airflow proving  
• Emergency stop input  
• High Efficiency 2”Throwaway Filters  
• High Efficiency 4”Throwaway Filters  
• High Efficiency supply fan motors  
• Manual fresh air damper  
• Economizer with dry bulb control  
• Economizer with reference enthalpy  
control  
• Compressor lead-lag  
• Economizer with differential  
(comparative) enthalpy control  
• Inlet guide vanes on VAV units  
• Variable frequency drives on VAV  
units (with or without bypass)  
• Service Valves  
• Through-the-base electrical provision  
• Factory mounted disconnect with  
external handle (non-fused)  
• Factory powered 15A GFI  
convenience outlet  
• Occupied-Unoccupied switching  
• Timed override activation  
• FC supply fans  
• UL and CSA listing on standard options  
• Two inch standard efficiency filters  
• Finish exceeds salt spray requirements  
of ASTM B117  
• Sloped condensate drain pan  
• Field powered 15A GFI convenience  
outlet  
• Integrated Comfort™ System Control  
Option  
• Ventilation Override  
• Hinged Service Access  
• Factory installed condenser coil  
guards  
• Black epoxy coated condenser coil  
• Sloped stainless steel evaporator coil  
drain pans  
4
RT-PRC007-EN  
Features and  
Benefits  
Trane 3-D® Scroll Compressor  
Simple Design with 70% Fewer Parts  
Proven Design Through Testing and  
Research  
than 400,000 hours of laboratory testing  
and field operation.This work combined  
with over 25 patents makesTrane the  
worldwide leader in air conditioning  
scroll compressor technology.  
With over twenty years of development  
and testing,Trane 3-D Scroll  
compressors have undergone more  
Fewer parts than an equal capacity  
reciprocating compressor means  
significant reliability and efficiency  
benefits.The single orbiting scroll  
eliminates the need for pistons,  
connecting rods, wrist pins and valves.  
Fewer parts lead to increased reliability.  
Fewer moving parts, less rotating mass  
and less internal friction means greater  
efficiency than reciprocating  
compressors.  
TheTrane 3-D Scroll provides important  
reliability and efficiency benefits.The 3-D  
Scroll allows the orbiting scrolls to touch  
in all three dimensions, forming a  
completely enclosed compression  
chamber which leads to increased  
efficiency. In addition, the orbiting scrolls  
only touch with enough force to create a  
seal; there is no wear between the scroll  
plates.The fixed and orbiting scrolls are  
made of high strength cast iron which  
results in less thermal distortion, less  
leakage, and higher efficiencies. The  
most outstanding feature of the 3-D  
Scroll compressor is that slugging will  
not cause failure. In a reciprocating  
compressor, however, the liquid or dirt  
can cause serious damage.  
Low Torque Variation  
The 3-D Scroll compressor has a very  
smooth compression cycle; torque  
variations are only 30 percent of that  
produced by a reciprocating compressor.  
This means that the scroll compressor  
imposes very little stress on the motor  
resulting in greater reliability. Low torque  
variation reduces noise and vibration.  
Suction Gas Cooled Motor  
Compressor motor efficiency and  
reliability is further optimized with the  
latest scroll design. Cool suction gas  
keeps the motor cooler for longer life and  
better efficiency.  
One of two matched scroll plates —  
the distinguishing feature of the scroll  
compressor.  
Chart illustrates low torque variation of  
3-D Scroll compressor vs  
reciprocating compressor.  
RT-PRC007-EN  
5
Features and  
Benefits  
Quality and Reliability  
Forced Combustion Blower  
Negative Pressure Gas Valve  
Hot Surface Ignitor  
Drum and Tube Heat Exchanger  
Drum and Tube Heat Exchanger  
Micro Controls  
The negative pressure gas valve will not  
allow gas flow unless the combustion  
blower is operating.This is one of our  
unique safety features.  
The drum and tube heat exchanger is  
designed for increased efficiency and  
reliability and has utilized improved  
technology incorporated in the large roof  
top commercial units for almost  
20 years.  
The Micro provides unit control for  
heating, cooling and ventilating utilizing  
input from sensors that measure outdoor  
and indoor temperature.  
The forced combustion blower supplies  
pre-mixed fuel through a single stainless  
steel burner screen into a sealed drum  
where ignition takes place. It is more  
reliable to operate and maintain than a  
multiple burner system.  
Quality and Reliability are enhanced  
through the use of time-tested micro-  
processor controls and logic.  
The heat exchanger is manufactured  
using aluminized steel with stainless  
steel components for maximum  
durability.The requirement for cycle  
testing of heat exchangers is 10,000  
cycles by ANSI Z21.47.This is the  
standard required by both UL and AGA  
for cycle test requirements.Trane  
requires the design to be tested to 21/  
times this current standard.The drum2  
and tube design has been tested and  
passed over 150,000 cycles which is over  
15 times the current ANSI cycling  
requirements.  
The Micro:  
• prevents the unit from short cycling,  
considerably improving  
compressor life.  
• ensures that the compressor will run  
for a specific amount of time which  
allows oil to return for better  
lubrication, enhancing the reliability  
of the commercial compressor.  
The hot surface ignitor is a gas ignition  
device which doubles as a safety device  
utilizing a continuous test to prove the  
flame.The design is cycle tested at the  
factory for quality and reliability.  
All the gas/electric rooftops exceed all  
California seasonal efficiency  
requirements.They also perform better  
than required to meet the California NOx  
emission requirements.  
The Voyager with the Micro reduces the  
number of components required to  
operate the unit, thereby reducing  
possibilities for component failure.  
6
RT-PRC007-EN  
Features and  
Benefits  
Ease of Installation  
FC Fans with Inlet Guide Vanes  
Contractors look for lower installation  
(jobsite) costs.Voyager’s conversionless  
units provide many time and money  
saving features.  
Trane’s forward-curved fans with inlet  
guide vanes pre-rotate the air in the  
direction of the fan wheel, decreasing  
static pressure and horsepower,  
essentially unloading the fan wheel.The  
unloading characteristics of aTrane FC  
fan with inlet guide vanes result in  
superior part load performance.  
Conversionless Units  
The dedicated design units (either  
downflow or horizontal) require no panel  
removal or alteration time to convert in  
the field — a major cost savings during  
installation.  
Improved Airflow  
U-shaped airflow allows for improved  
static capabilities.The need for high static  
motor conversion is minimized and time  
isn’t spent changing to high static  
oversized motors.  
Excellent Part-Load Efficiency  
The Scroll compressor’s unique design  
allows it to be applied in a passive  
parallel manifolded piping scheme,  
something that a “recip” just doesn’t do  
very well.  
Single Point Power  
A single electrical connection powers the  
unit.  
When the unit begins stage back at part  
load it still has the full area and circuitry  
of its evaporator and condenser coils  
available to transfer heat. In simple  
terms this means superior part-load  
efficiencies (IPLV) and lower unit  
operating costs.  
Micro™  
The function of the Micro replaces the  
need for field installed anti-shortcycle  
timer and time delay relays.The Micro  
ensures that these controls are integral  
to the unit.The contractor no longer has  
to purchase these controls as options  
and pay to install them.  
Rigorous Testing  
All ofVoyager’s designs were rigorously  
rain tested at the factory to ensure water  
integrity.  
The wiring of the low voltage  
connections to the unit and the zone  
sensors is as easy as 1-1, 2-2, and 3-3.  
This simplified system makes it easier  
for the installer to wire.  
Actual shipping tests are performed to  
determine packaging requirements.  
Units are test shipped around the  
country. Factory shake and drop tested  
as part of the package design process to  
help assure that the unit will arrive at  
your job site in top condition.  
Rigging tests include lifting a unit into  
the air and letting it drop one foot,  
assuring that the lifting lugs and rails  
hold up under stress.  
We perform a 100% coil leak test at the  
factory.The evaporator and condenser  
coils are leak tested at 200 psig and  
pressure tested to 450 psig.  
All parts are inspected at the point of  
final assembly. Sub-standard parts are  
identified and rejected immediately.  
Every unit receives a 100% unit run test  
before leaving the production line to  
make sure it lives up to rigorousTrane  
requirements.  
RT-PRC007-EN  
7
Features and  
Benefits  
Easy Access Low Voltage Terminal Board  
Easy to Service  
Voyager’s Low VoltageTerminal Board is  
external to the electrical control cabinet.  
It is extremely easy to locate and attach  
the thermostat wire.This is another cost  
and time-saving installation feature.  
Because today’s owners are very cost-  
conscious when it comes to service and  
maintenance, theTrane Voyager was  
designed with direct input from service  
contractors.This valuable information  
helped to design a product that would  
get the serviceman off the job quicker  
and save the owner money. Voyager  
does this by offering:  
Value  
Low Ambient Cooling  
AllVoyager Commercial units have  
cooling capabilities down to 0 F as  
standard.  
A Simpler Design  
The Voyager design uses fewer parts  
than previous units. Since it is simpler in  
design, it is easier to diagnose.  
Power Exhaust Option  
Provides exhaust of the return air when  
using an economizer to maintain proper  
building pressurization. Great for  
relieving most building  
Micro  
The Micro requires no special tools to  
run the Voyager unit through its paces.  
Simply place a jumper betweenTest 1  
andTest 2 terminals on the Low Voltage  
Terminal Board and the unit will walk  
through its operational steps  
automatically.  
—The unit automatically returns  
control to the zone sensor after  
stepping through the test mode a  
single time, even if the jumper is  
left on the unit.  
overpressurization problems.  
Micro Benefits  
The Micro in the Voyager units has built-  
in anti-short-cycle timer, time delay relay  
and minimum “on” time controls.These  
controls are functions of the Micro and  
are factory tested to assure proper  
operation.  
The Micro softens electrical “spikes” by  
staging on fans, compressors and  
heaters.  
As long as the unit has power and the  
“system on” LED is lit, the Micro is  
operational.The light indicates that the  
Micro is functioning properly.  
Horizontal Discharge with  
Power Exhaust Option  
Intelligent Fallback is a benefit to the  
building occupant. If a component goes  
astray, the unit will continue to operate  
at predetermined temperature setpoint.  
The Micro features expanded diagnostic  
capabilities when utilized withTrane’s  
Integrated Comfort™ Systems.  
Intelligent Anticipation is a standard  
feature of the Micro. It functions  
constantly as the Micro and zone sensor  
work together in harmony to provide  
tighter comfort control than conventional  
electro-mechanical thermostats.  
Some Zone Sensor options have central  
control panel lights which indicate the  
mode the unit is in and possible  
diagnostic information (dirty filters for  
example).  
8
RT-PRC007-EN  
Features and  
Benefits  
VariTrac  
Downflow and Horizontal Economizers  
Trane’s changeover VAV System for light  
commercial applications is also  
available. Coupled with Voyager  
Commercial, it provides the latest in  
technological advances for comfort  
management systems and can allow  
thermostat control in every zone served  
by VariTrac™.  
The economizers come with three  
control options dry bulb, enthalpy and  
differential enthalpy. (Photo above  
shows the three fresh air hoods on the  
Horizontal Discharge Configuration).  
V
Central  
Control Panel  
Trane Communication Interface (TCI)  
Available factory or field installed.This  
module when applied with the Micro  
easily interfaces withTrane’s Integrated  
Comfort™ System.  
Variable Frequency Drives (VFD)  
Variable Frequency Drives are factory  
installed and tested to provide supply fan  
motor speed modulation.VFD’s, as  
compared to inlet guide vanes or  
discharge dampers, are quieter, more  
efficient, and are eligible for utility  
rebates.The VFD’s are available with or  
without a bypass option. Bypass control  
will simply provide full nominal airflow  
in the event of drive failure.  
TIME  
CLOCK  
INPUT/  
STATUS  
EDIT  
PANEL  
TERMINAL  
Trane factory built roof curbs  
Available for all units.  
One of Our Finest Assets  
Trane Commercial Sales Engineers are a  
support group that can assist you with:  
— Product  
— Application  
— Service  
—Training  
— Special Applications  
— Specifications  
— Computer Programs and more  
RT-PRC007-EN  
9
Application  
Considerations  
Exhaust Air Options  
amounts of outdoor air into the building.  
If, however, building pressure is not of a  
critical nature, the non-modulating  
exhaust fan may be sized for more than  
50 percent of design supply airflow.  
ConsultTable PD-16 for specific exhaust  
fan capabilities with Voyager Commercial  
units.  
3
When is it necessary to provide building  
exhaust?  
Use the actual cfm and the corrected  
static pressure to determine the fan rpm  
and bhp from the rooftop performance  
tables or curves.  
Whenever an outdoor air economizer is  
used, a building generally requires an  
exhaust system.The purpose of the  
exhaust system is to exhaust the proper  
amount of air to prevent over or under-  
pressurization of the building.  
4
The fan rpm is correct as selected.  
Barometric Relief Dampers  
5
Barometric relief dampers consist of  
gravity dampers which open with  
increased building pressure. As the  
building pressure increases, the pressure  
in the unit return section also increases,  
opening the dampers and relieving air.  
Barometric relief may be used to provide  
relief for single story buildings with no  
return ductwork and exhaust  
Bhp must be multiplied by the air density  
ratio to obtain the actual operating bhp.  
A building may have all or part of its  
exhaust system in the rooftop unit. Often,  
a building provides exhaust external to  
the air conditioning equipment.This  
external exhaust must be considered  
when selecting the rooftop exhaust  
system.  
In order to better illustrate this procedure,  
the following example is used:  
Consider a 30-ton rooftop unit that is to  
deliver 11,000 actual cfm at 1.50 inches  
total static pressure (tsp), 55 F leaving air  
temperature, at an elevation of 5,000 ft.  
Voyager Commercial rooftop units offer  
two types of exhaust systems:  
requirements less than 25 percent.  
1
1
Altitude Corrections  
From Figure PD-1, the air density ratio is  
0.86.  
Power exhaust fan.  
2
The rooftop performance tables and  
curves of this catalog are based on  
standard air (.075 lbs/ft). If the rooftop  
airflow requirements are at other than  
standard conditions (sea level), an air  
density correction is needed to project  
accurate unit performance.  
2
Barometric relief dampers.  
Application Recommendations  
Power Exhaust Fan  
Tsp=1.50 inches/0.86=1.74 inches tsp.  
3
From the performance tables: a 30-ton  
rooftop will deliver 11,000 cfm at 1.74  
inches tsp at 668 rpm and 6.93 bhp.  
The exhaust fan option is a dual,  
nonmodulating exhaust fan with  
Figure PD-1 shows the air density ratio at  
various temperatures and elevations.  
Trane rooftops are designed to operate  
between 40 and 90 degrees Fahrenheit  
leaving air temperature.  
approximately half the air-moving  
capabilities of the supply fan system.The  
experience ofTheTrane Company is that  
a non-modulating exhaust fan selected  
for 40 to 50 percent of nominal supply  
cfm can be applied successfully.  
4
The rpm is correct as selected — 668  
rpm.  
The procedure to use when selecting a  
supply or exhaust fan on a rooftop for  
elevations and temperatures other than  
standard is as follows:  
5
Bhp = 6.93 x 0.86 = 5.96 .  
The power exhaust fan generally should  
not be selected for more than 40 to 50  
percent of design supply airflow. Since it  
is an on/off nonmodulating fan, it does  
not vary exhaust cfm with the amount of  
outside air entering the building.  
Therefore, if selected for more than 40 to  
50 percent of supply airflow, the building  
may become underpressurized when  
economizer operation is allowing lesser  
Compressor MBh, SHR, and kw should  
be calculated at standard and then  
converted to actual using the correction  
factors inTable PD-2. Apply these factors  
to the capacities selected at standard cfm  
so as to correct for the reduced mass  
flow rate across the condenser.  
1
First, determine the air density ratio  
using Figure PD-1.  
2
Divide the static pressure at the  
nonstandard condition by the air density  
ratio to obtain the corrected static  
pressure.  
10  
RT-PRC007-EN  
Application  
Considerations  
Heat selections other than gas heat will  
not be affected by altitude. Nominal gas  
capacity (output) should be multiplied by  
the factors given inTable PD-3 before  
calculating the heating supply air  
temperature.  
4
When two or more units are to be placed  
side by side, the distance between the  
units should be increased to 150 percent  
of the recommended single unit  
clearance.The units should also be  
staggered for two reasons:  
If several units are to be placed on one  
span, they should be staggered to  
reduce deflection over that span.  
It is impossible to totally quantify the  
effect of building structure on sound  
transmission, since this depends on the  
response of the roof and building  
members to the sound and vibration of  
the unit components. However, the  
guidelines listed above are experience-  
proven guidelines which will help reduce  
sound transmissions.  
Acoustical Considerations  
1
Proper placement of rooftops is critical to  
reducing transmitted sound levels to the  
building.The ideal time to make  
provisions to reduce sound  
transmissions is during the design  
phase. And the most economical means  
of avoiding an acoustical problem is to  
place the rooftop(s) away from  
acoustically critical areas. If possible,  
rooftops should not be located directly  
above areas such as: offices, conference  
rooms, executive office areas and  
classrooms. Instead, ideal locations  
might be over corridors, utility rooms,  
toilets or other areas where higher  
sound levels directly below the unit(s)  
are acceptable.  
To reduce span deflection if more than  
one unit is placed on a single span.  
Reducing deflection discourages sound  
transmission.  
2
To assure proper diffusion of exhaust air  
before contact with the outside air intake  
of adjacent unit.  
Clearance Requirements  
The recommended clearances identified  
with unit dimensions should be  
maintained to assure adequate  
serviceability, maximum capacity and  
peak operating efficiency. A reduction in  
unit clearance could result in condenser  
coil starvation or warm condenser air  
recirculation. If the clearances shown are  
not possible on a particular job, consider  
the following:  
Duct Design  
It is important to note that the rated  
capacities of the rooftop can be met only  
if the rooftop is properly installed in the  
field. A well designed duct system is  
essential in meeting these capacities.  
The satisfactory distribution of air  
throughout the system requires that  
there be an unrestricted and uniform  
airflow from the rooftop discharge duct.  
This discharge section should be straight  
for at least several duct diameters to  
allow the conversion of fan energy from  
velocity pressure to static pressure.  
Several basic guidelines for unit  
placement should be followed to  
minimize sound transmission through  
the building structure:  
Do the clearances available allow for  
major service work such as changing  
compressors or coils?  
Do the clearances available allow for  
proper outside air intake, exhaust air  
removal and condenser airflow?  
1
Never cantilever the compressor end of  
the unit. A structural cross member must  
support this end of the unit.  
However, when job conditions dictate  
elbows be installed near the rooftop  
outlet, the loss of capacity and static  
pressure may be reduced through the  
use of guide vanes and proper direction  
of the bend in the elbow.The high  
velocity side of the rooftop outlet should  
be directed at the outside radius of the  
elbow rather than the inside.  
If screening around the unit is being  
used, is there a possibility of air  
recirculation from the exhaust to the  
outside air intake or from condenser  
exhaust to condenser intake?  
2
Locate the unit’s center of gravity which  
is close to, or over, a column or main  
support beam.  
Actual clearances which appear  
inadequate should be reviewed with a  
localTrane sales engineer.  
3
If the roof structure is very light, roof  
joists must be replaced by a structural  
shape in the critical areas described  
above.  
RT-PRC007-EN  
11  
Selection  
Procedure  
Selection ofTrane commercial air  
conditioners is divided into five basic  
areas:  
b
A psychrometric chart can be used to  
more accurately determine the mixture  
temperature to the evaporator coil.  
2” Hi-efficiency throwaway filters.  
c
1
Step 4 — Determine total required unit  
cooling capacity:  
Exhaust fan.  
Cooling capacity  
d
Required capacity = total peak load +  
O.A. load + supply air fan motor heat.  
2
Economizer cycle.  
Heating capacity  
From Figure SP-1, the supply air fan  
motor heat for 7.27 bhp = 20.6 MBh.  
Step 1 — A summation of the peak  
cooling load and the outside air  
3
Air delivery  
ventilation load shows: 27.75 tons + 1.52  
tons = 29.27 required unit capacity. From  
Table 18-2, 30-ton unit capacity at 80 DB/  
67 WB, 95 F entering the condenser and  
Capacity = 321 + 18.23 + 20.6 =  
359.8 MBh (30 tons)  
4
Step 5 — Determine unit capacity:  
Unit electrical requirements  
12,000 total peak supply cfm, is 30.0 tons. From Table PD-4 unit capacity at 81.5 DB.  
5
Thus, a nominal 30-ton unit is selected.  
67WB entering the evaporator, 12000  
supply air cfm, 95 F entering the  
condenser is 361 MBh (30.1 tons) 279  
sensible MBh.  
Unit designation  
Step 2 — Having selected a nominal 30-  
ton unit, the supply fan and exhaust fan  
motor bhp must be determined.  
Factors Used In Unit Cooling Selection:  
1
Step 6 — Determine leaving air  
temperature:  
Summer design conditions — 95 DB/  
Supply Air Fan:  
76 WB, 95 F entering air to condenser.  
Determine unit static pressure at design  
supply cfm:  
Unit sensible heat capacity, corrected for  
supply air fan motor heat 279 - 20.6 =  
258.4 MBh.  
2
External static pressure  
Heat exchanger  
(Table PD-14)  
1.20 inches  
.14 inches  
Summer room design conditions —  
76 DB/66WB.  
Supply air dry bulb temperature  
difference = 258.4 MBh ÷ (1.085 x 12,000  
cfm) = 19.8 F.  
3
Total peak cooling load — 321 MBh (27.75  
tons).  
High efficiency filter 2”  
(Table PD-14)  
.09 inches  
.076 inches  
1.50 inches  
Supply air dry bulb: 81.5 - 19.8 = 61.7.  
Unit enthalpy difference = 361 ÷ (4.5 x  
12,000) = 6.7  
4
Economizer  
Total peak supply cfm — 12,000 cfm.  
(Table PD-14)  
Btu/lb leaving enthalpy = h (ent WB) =  
31.62  
5
Unit total static pressure  
External static pressure — 1.0 inches.  
Using total cfm of 12,000 and total  
static pressure of 1.50 inches, enterTable  
PD-12.Table PD-12 shows 7.27 bhp with  
652 rpm.  
Leaving enthalpy = 31.62 Btu/lb -  
6.7 Btu/lb = 24.9 Btu/lb.  
6
Return air temperatures — 80 DB/66WB.  
From Table PD-1, the leaving air wet bulb  
temperature corresponding to an  
enthalpy of 24.9 Btu/lb = 57.5.  
7
Step 3 — Determine evaporator coil  
entering air conditions. Mixed air dry  
bulb temperature determination.  
Return air cfm — 4250 cfm.  
Leaving air temperatures =  
61.7 DB/57.5 WB  
8
Using the minimum percent of OA (1,200  
cfm ÷ 12,000 cfm = 10 percent),  
determine the mixture dry bulb to the  
evaporator. RADB + %OA (OADB - RADB)  
= 80 + (0.10) (95 - 80) = 80 + 1.5 = 81.5F  
Outside air ventilation cfm and load —  
1200 cfm and 18.23 MBh (1.52 tons).  
9
Unit accessories include:  
a
Approximate wet bulb mixture  
temperature:  
Aluminized heat exchanger — high heat  
module.  
RAWB + OA (OAWB - RAWB) = 66 + (0.10)  
(76-66) = 68 + 1 = 67 F.  
12  
RT-PRC007-EN  
Selection  
Procedure  
Heating capacity selection:  
Table PD-9 also shows an air  
temperature rise of 23.6 F for 12,000 cfm  
through the 90 kw heat module.  
The supply air fan motor selected in the  
previous cooling capacity determination  
example was 7.27 bhp with 652 rpm.  
Thus, the supply fan motor selected is 7.5  
hp.  
1
Winter outdoor design conditions—5 F.  
Unit supply temperature at design  
heating conditions = mixed air  
temperature + air temperature rise = 66.4  
+ 23.6 = 90 F.  
2
To select the drive, enterTable PD-15 for  
a 30-ton unit. Select the appropriate  
drive for the applicable rpm range. Drive  
selection letter C with a range of 650  
rpm, is required for 652 rpm.Where  
altitude is significantly above sea level,  
useTable PD-2 and PD-3, and Figure PD-1  
for applicable correction factors.  
Total return air temperature — 72 F.  
3
Natural Gas Heating System  
Winter outside air minimum ventilation  
load and cfm — 1,200 cfm and 87.2 MBh.  
Assume natural gas supply — 1000 Btu/  
ft3. From Table PD-11, select the high heat  
module (486 MBh output) to satisfy 291.6  
at unit cfm.  
4
Peak heating load 225 MBh.  
Utilizing unit selection in the cooling  
capacity procedure.  
Table PD-11 also shows air temperature  
rise of 37.3 F for 12,000 cfm through  
heating module.  
Unit Electrical Requirements  
Selection procedures for electrical  
requirements for wire sizing amps,  
maximum fuse sizing and dual element  
fuses are given in the electrical service  
selection of this catalog.  
Mixed air temperature = RADB + %O.A.  
(OADB - RADB) = 72  
+ (0.10) (0-72) = 64.8 F.  
Unit supply temperature design heating  
conditions = mixed air temperature + air  
temperature rise = 66.4 + 37.3 = 103.7 F.  
Supply air fan motor heat temperature  
rise = 20,600 BTU ÷ (1.085 x 12,000) cfm  
= 1.6 F.  
Air Delivery Procedure  
Unit Designation  
Supply air fan bhp and rpm selection.  
Unit supply air fan performance shown  
inTable PD-12 includes pressure drops  
for dampers and casing losses. Static  
pressure drops of accessory  
components such as heating systems,  
and filters if used, must be added to  
external unit static pressure for total  
static pressure determination.  
After determining specific unit  
characteristics utilizing the selection  
procedure and additional job  
information, the complete unit model  
number can be developed. Use the  
model number nomenclature on page  
14.  
Mixed air temperature entering heat  
module = 64.8 + 1.6 = 66.4 F.  
Total winter heating load = peak heating  
+ ventilation load - total fan motor heat =  
225 + 87.2 - 20.6 = 291.6 MBh.  
Electric Heating System  
Unit operating on 480/60/3 power supply.  
From Table PD-9, kw may be selected for  
a nominal 30-ton unit operating on 480-  
volt power.The high heat module — 90  
KW or 307 MBh will satisfy the winter  
heating load of 291.6 MBh.  
STANDARD MOTOR  
HIGH EFFICIENCY MOTOR  
Figure SP-1 — Fan Motor Heat  
120  
110  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
0
5
10  
15  
20  
25  
30  
35  
40  
MOTOR BRAKE HORSE POWER  
RT-PRC007-EN  
13  
Model  
Num ber  
Description  
YC  
12  
D
3
480  
456  
A
7
4
8
H
9
A
1
A
4
F
D
1
A
0
0
0
0
0
0
0
0
0
0
0
05  
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29  
Digit 16 — System Control  
1 = Constant Volume  
2 = VAV Supply Air Temperature Control  
w/o Inlet Guide Vanes  
3 = VAV Supply Air Temperature Control  
w/Inlet Guide Vanes  
4 = VAV Supply Air Temperature Control  
w/Variable Frequency Drive w/o Bypass  
5 = VAV Supply Air Temperature Control  
w/Variable Frequency Drive and Bypass  
Note: Zone sensors are not included with  
option and must be ordered as a separate  
accessory.  
Digit 13 — Supply Fan Motor, HP  
1 = 7.5 Hp Std. Eff.  
2 = 10 Hp Std. Eff.  
3 = 15 Hp Std. Eff.  
4 = 20 Hp Std. Eff.  
5 = 7.5 Hp Hi. Eff.  
6 = 10 Hp Hi. Eff.  
7 = 15 Hp Hi. Eff.  
8 = 20 Hp Hi. Eff.  
Digit 1, 2 — Unit Function  
TC = DX Cooling, No Heat  
TE = DX Cooling, Electric Heat  
YC = DX Cooling, Natural Gas Heat  
Digit 3 — Unit Airflow Design  
D = Downflow Configuration  
H = Horizontal Configuration  
Digit 4, 5, 6 — Nominal Cooling Capacity  
330 = 27½ Tons  
360 = 30 Tons  
420 = 35 Tons  
480 = 40 Tons  
Digit 14 — Supply Air Fan Drive  
Selections (See Note 3)  
A = 550 RPM  
B = 600 RPM  
C = 650 RPM  
D = 700 RPM  
E = 750 RPM  
F = 790 RPM  
G = 800 RPM  
H = 500 RPM  
J = 525 RPM  
K = 575 RPM  
L = 625 RPM  
M = 675 RPM  
N = 725 RPM  
600 = 50 Tons  
Digit 17 - 29 — Miscellaneous  
A = Service Valves (See Note 2)  
B = Through the Base Electrical Provision  
C = Non-Fused Disconnect Switch with  
External Handle  
D = Factory-Powered 15A GFI  
Convenience Outlet and Non-Fused  
Disconnect Switch with  
Digit 7 — Major Development Sequence  
A = First  
Digit 8 — Power Supply (See Note 1)  
E = 208/60/3  
F = 230/60/3  
4 = 460/60/3  
5 = 575/60/3  
Digit 15 — Fresh Air Selection  
A = No Fresh Air  
B = 0-25% Manual Damper  
C = 0-100% Economizer, Dry Bulb Control  
D = 0-100% Economizer, Reference  
Enthalpy Control  
E = 0-100% Economizer, Differential  
Enthalpy Control  
F = “C” Option and Low Leak Fresh  
Air Damper  
External Handle  
E = Field-Powered 15A GFI  
Convenience Outlet  
Digit 9 — Heating Capacity (See Note 4)  
0 = No Heat (TC only)  
L = Low Heat (YC only)  
H = High Heat (YC only)  
Note: When second digit is “E” for Electric  
Heat, the following values apply in the ninth  
digit.  
A = 36 KW  
B = 54 KW  
C = 72 KW  
D = 90 KW  
F = ICS Control Option — Trane  
Communication Interface, Supply Air  
Sensing and Clogged Filter Switch  
G = Ventilation Override  
H = Hinged Service Access  
J = Condenser Coil Guards  
K = LonTalk Communication Interface  
L = Special  
G = “D” Option and Low Leak Fresh  
Air Damper  
H = “E” Option and Low Leak Fresh  
Air Damper  
M = Stainless Steel Drain Pans  
N = Black Epoxy Coated Condenser Coil  
E = 108 KW  
Digit 10 Design Sequence  
A = First  
Digit 11 — Exhaust  
0 = None  
1 = Barometric Relief  
(Available w/Economizer only)  
2 = Power Exhaust Fan  
(Available w/Economizer only)  
No t e :  
1. All voltages are across the line starting only.  
2. Option includes Liquid, Discharge, Suction Valves.  
3. Supply air fan drives A thru G are used with 27½-35 ton units only and drives H thru N are used with 40 & 50  
ton units only.  
4. Electric Heat KW ratings are based upon voltage ratings of 240/480/600 V. Voltage offerings are as follows (see  
table PD-9 for additional inform ation):  
Digit 12 — Filter  
A = Standard 2” Throwaway Filters  
B = High Efficiency 2” Throwaway Filters  
C = High Efficiency 4” Throwaway Filters  
KW  
Tons  
27½ to 35  
Voltage  
240  
36  
x
54  
x
72  
90  
108  
480  
600  
x
x
x
x
x
x
x
40 and 50  
240  
x
480  
600  
x
x
x
x
x
x
x
x
5. The service digit for each m odel num ber contains 29 digits; all 29 digits m ust be referenced.  
14  
RT-PRC007-EN  
General Data  
Table GD-1 — General Data — 27 1/2 - 30 Tons  
27 1/2Ton  
30Ton  
Cooling Perform ance1  
Nominal Gross Capacity  
329,000  
High  
363,000  
Natural Gas Heat2  
Heating Input (BTUH)  
First Stage  
Low  
350,000  
250,000  
283,500  
202,500  
81.00  
Low  
350,000  
250,000  
283,500  
202,500  
81.00  
High  
600,000  
425,000  
486,000  
344,500  
81.00  
2
600,000  
425,000  
486,000  
344,500  
81.00  
2
Heating Output (BTUH)  
First Stage  
Steady State Efficiency (%)3  
No. Burners  
1
1
No. Stages  
2
/
4
2
1
2
/
4
2
1
3
3
Gas Connection Pipe Size (in.)  
Electric Heat  
KW Range5  
27-90  
2
27-90  
2
Capacity Steps:  
Com pressor  
Number/Type  
Size (Nominal)  
2/Scroll  
10/15  
2/Scroll  
15  
Unit Capacity Steps (%)  
Motor RPM  
100/40  
3450  
100/50  
3450  
Outdoor Coil —Type  
Tube Size (in.) OD  
Face Area (sq. ft.)  
Rows/Fins Per Inch  
Indoor Coil —Type  
Tube Size (in.) OD  
Face Area (sq. ft.)  
Rows/Fins Per Foot  
Refrigerant Control  
No. of Circuits  
Lanced  
Lanced  
3
3
8
/
/
8
51.33  
2/16  
51.33  
2/16  
Hi-Performance  
Hi-Performance  
1
1
/
2
/
2
31.67  
2/180  
TXV  
31.67  
2/180  
TXV  
1
1
Drain Connection No./Size (in)  
Type  
1/1.25  
PVC  
1/1.25  
PVC  
Outdoor Fan Type  
No. Used/Diameter  
Drive Type/No. Speeds  
CFM  
No. Motors/HP/RPM  
Indoor Fan Type  
No. Used  
Propeller  
3/28.00  
Direct/1  
24,800  
3/1.10/1125  
FC  
Propeller  
3/28.00  
Direct/1  
24,800  
3/1.10/1125  
FC  
1
1
Diameter/Width (in)  
Drive Type/No. Speeds  
No. Motors/HP  
22.38/22.00  
Belt/1  
1/7.50/10.00  
1760  
22.38/22.00  
Belt/1  
1/7.50/10.00  
1760  
Motor RPM  
Motor Frame Size  
Exhaust Fan Type  
No. Used/Diameter (in)  
Drive Type/No. Speeds/Motors  
Motor HP/RPM  
Motor Frame Size  
Filters —Type Furnished  
No./ Recommended Size (in)6  
Refrigerant Charge (Lbs of R-22)4  
Minim um Outside Air Tem perature  
For Mechanical Cooling  
213/215T  
Propeller  
2/26.00  
Direct/2/2  
1.0/1075  
48  
Throwaway  
16/16 x 20 x 2  
46.00  
213/215T  
Propeller  
2/26.00  
Direct/2/2  
1.0/1075  
48  
Throwaway  
16/16 x 20 x 2  
46.60  
0 F  
0 F  
Notes:  
1. Cooling Perform ance is rated at 95 F am bient, 80 F entering dry bulb, 67 F entering wet bulb. Gross capacity does not include the effect of fan m otor heat. Rated and tested in  
accordance with the Unitary Large Equipm ent certification program , which is based on ARI Standard 340/360-93.  
2. Heating Perform ance lim it settings and rating data were established and approved under laboratory test conditions using Am erican National Standards Institute standards.  
Ratings shown are for elevations up to 4,500 feet.  
3. Steady State Efficiency is rated in accordance with DOE test procedures.  
4. Refrigerant charge is an approxim ate value. For a m ore precise value, see unit nam eplate and service instructions.  
5. Maxim um KW @ 208V = 41, @ 240V = 54.  
6. Filter dim ensions listed are nom inal. For actual filter and rack sizes see the Unit Installation, Operation, Maintenance Guide.  
RT-PRC007-EN  
15  
General Data  
Table GD-2— General Data — 35-40Ton  
35Ton  
40Ton  
Cooling Perform ance1  
Nominal Gross Capacity  
Natural Gas Heat2  
Heating Input (BTUH)  
First Stage  
Heating Output (BTUH)  
First Stage  
Steady State Efficiency (%)3  
No. Burners  
417,000  
513,000  
Low  
350,000  
250,000  
283,500  
202,500  
81.00  
High  
600,000  
425,000  
486,000  
344,500  
81.00  
2
Low  
400,000  
300,000  
324,000  
243,000  
81.00  
High  
800,000  
600,000  
648,000  
486,000  
81.00  
2
1
1
No. Stages  
2
/
4
2
1
2
/
4
2
1
3
3
Gas Connection Pipe Size (in.)  
Electric Heat  
KW Range5  
27-90  
2
41-108  
2
Capacity Steps:  
Com pressor  
Number/Type  
Size (nominal)  
Unit Capacity Steps (%)  
Motor RPM  
2/Scroll  
15  
100/50  
3450  
3/Scroll  
15/15/10  
100/60/40  
3450  
Outdoor Coil —Type  
Tube Size (in.) OD  
Face Area  
Rows/Fins Per Inch  
Indoor Coil —Type  
Tube Size (in.) OD  
Face Area (sq. ft.)  
Rows/Fins Per Foot  
Refrigerant Control  
No. of Circuits  
Lanced  
Lanced  
3
3
/
/
8
8
51.33  
2/16  
69.79  
2/16  
Hi-Performance  
Hi-Performance  
1
1
/
2
/
2
31.67  
3/180  
TXV  
37.50  
3/180  
TXV  
1
2
Drain Connection No./Size (in)  
Type  
1/1.25  
PVC  
1/1.25  
PVC  
Outdoor Fan Type  
No. Used/Diameter  
Drive Type/No. Speeds  
CFM  
No. Motors/HP/RPM  
Indoor Fan Type  
No. Used  
Propeller  
3/28.00  
Direct/1  
24,800  
3/1.10/1125  
FC  
Propeller  
4/28.00  
Direct/1  
31,700  
4/1.10/1125  
FC  
1
1
Diameter/Width (in)  
Drive Type/No. Speeds  
No. Motors/HP  
22.38/22.00  
Belt/1  
1/7.50/10.00/15.00  
1760  
25.00/25.00  
Belt/1  
1/10.00/15.00  
1760  
Motor RPM  
Motor Frame Size  
Exhaust Fan Type  
No. Used/Diameter (in)  
Drive Type/No. Speeds/Motors  
Motor HP/RPM  
Motor Frame Size  
Filters —Type Furnished  
No./Recommended Size (in)6  
Refrigerant Charge (Lbs of R-22)4  
Minim um Outside Air Tem perature  
For Mechanical Cooling  
Notes:  
213/215/254T  
Propeller  
2/26.00  
Direct/2/2  
1.0/1075  
48  
Throwaway  
16/16 x 20 x 2  
51.50  
215/254T  
Propeller  
2/26.00  
Direct/2/2  
1.0/1075  
48  
Throwaway  
17/16 x 20 x 2  
26.00/47.10 per circuit  
0 F  
0 F  
1. Cooling Perform ance is rated at 95 F am bient, 80 F entering dry bulb, 67 F entering wet bulb. Gross capacity does not include the effect of fan m otor heat. Rated and tested  
in accordance with the Unitary Large Equipm ent certification program , which is based on ARI Standard 340/360-93.  
2. Heating Perform ance lim it settings and rating data were established and approved under laboratory test conditions using Am erican National Standards Institute standards.  
Ratings shown are for elevations up to 4,500 feet.  
3. Steady State Efficiency is rated in accordance with DOE test procedures.  
4. Refrigerant charge is an approxim ate value. For a m ore precise value, see unit nam eplate and service instructions.  
5. Maxim um KW @ 208V = 41, @ 240V = 54.  
6. Filter dim ensions listed are nom inal. For actual filter and rack sizes see the Unit Installation, Operation, Maintenance Guide.  
16  
RT-PRC007-EN  
General Data  
Table GD-3— General Data — 50Ton  
Table GD-4 — Economizer Outdoor Air  
Damper Leakage (Of Rated Airflow)  
∆P Across Dampers (In. WC)  
50Ton  
Cooling Perform ance1  
Nominal Gross Capacity  
Natural Gas Heat2  
Heating Input (BTUH)  
First Stage  
Heating Output (BTUH)  
First Stage  
Steady State Efficiency (%)3  
No. Burners  
616,000  
0.5 (In.)  
1.5 %  
0.5 %  
1.0 (In.)  
2.5 %  
1.0 %  
Low  
High  
800,000  
600,000  
648,000  
486,000  
81.00  
2
Standard  
Optional “Low Leak”  
400,000  
300,000  
324,000  
243,000  
81.00  
Note: Above data based on tests com pleted in  
accordance with AMCA Standard 575.  
1
No. Stages  
2
/
4
2
1
3
Gas Connection Pipe Size (in.)  
Electric Heat  
KW Range5  
41-108  
2
Capacity Steps:  
Com pressor  
Number/Type  
Size (nominal)  
3/Scroll  
14  
Unit Capacity Steps (%)  
Motor RPM  
100/67/33  
3450  
Outdoor Coil —Type  
Tube Size (in.) OD  
Face Area (sq. ft.)  
Rows/Fins Per Inch  
Indoor Coil —Type  
Tube Size (in.) OD  
Face Area (sq. ft.)  
Rows/Fins Per Foot  
Refrigerant Control  
No. of Circuits  
Lanced  
3
/
8
69.79  
2/16  
Hi-Performance  
1
/
2
37.50  
4/164  
TXV  
2
Drain Connection No./Size (in)  
Type  
1/1.25  
PVC  
Outdoor Fan Type  
No. Used/Diameter  
Drive Type/No. Speeds  
CFM  
Propeller  
4/28.00  
Direct/1  
31,700  
No. Motors/HP/RPM  
Indoor Fan Type  
No. Used  
4/1.10/1125  
FC  
1
Diameter/Width (in)  
Drive Type/No. Speeds  
No. Motors/HP  
25.00/25.00  
Belt/1  
1/10.00/15.00/20.00  
1760  
Motor RPM  
Motor Frame Size  
Exhaust Fan Type  
No. Used/Diameter (in)  
Drive Type/No. Speeds/Motors  
Motor HP/RPM  
Motor Frame Size  
Filters —Type Furnished  
No./Recommended Size (in)6  
Refrigerant Charge (Lbs of R-22)4  
Minim um Outside Air Tem perature  
For Mechanical Cooling  
215/254/256T  
Propeller  
2/26.00  
Direct/2/2  
1.0/1075  
48  
Throwaway  
17/16 x 20 x 2  
25.70/54.30 per circuit  
0 F  
Notes:  
1. Cooling Perform ance is rated at 95 F am bient, 80 F entering dry bulb, 67 F entering wet bulb. Gross capacity does  
not include the effect of fan m otor heat. Rated and tested in accordance with the Unitary Large Equipm ent  
certification program , which is based on ARI Standard 340/360-93.  
2. Heating Perform ance lim it settings and rating data were established and approved under laboratory test conditions  
using Am erican National Standards Institute standards. Ratings shown are for elevations up to 4,500 feet.  
3. Steady State Efficiency is rated in accordance with DOE test procedures.  
4. Refrigerant charge is an approxim ate value. For a m ore precise value, see unit nam eplate and service instructions.  
5. Maxim um KW @ 208V = 41, @ 240V = 54.  
6. Filter dim ensions listed are nom inal. For actual filter and rack sizes see the Unit Installation, Operation,  
Maintenance Guide.  
RT-PRC007-EN  
17  
Perform ance  
Adjustm ent  
Factors  
Table PD-1— Enthalpy of Saturated AIR  
Figure PD-1 —Air Density Ratios  
Altitude/Temperature Correction  
Wet BulbTemperature  
40  
Btu Per Lb.  
15.23  
41  
42  
43  
15.70  
16.17  
16.66  
44  
45  
17.15  
17.65  
46  
47  
48  
18.16  
18.68  
19.21  
49  
50  
19.75  
20.30  
51  
52  
53  
20.86  
21.44  
22.02  
Air Density  
Ratio (Density  
at New  
54  
55  
22.62  
23.22  
Air Density)  
Condition/Std.  
56  
57  
58  
23.84  
24.48  
25.12  
59  
60  
25.78  
26.46  
61  
62  
63  
27.15  
27.85  
28.57  
64  
65  
29.31  
30.06  
66  
67  
68  
30.83  
31.62  
32.42  
Rooftop Leaving AirTemperature (degrees F)  
69  
70  
33.25  
34.09  
Table PD-2 — Cooling Capacity Altitude Correction Factors  
71  
72  
73  
74  
75  
34.95  
35.83  
36.74  
37.66  
38.61  
Altitude (Ft.)  
Sea Level  
1.00  
1000  
0.99  
2000  
0.99  
3000  
0.98  
4000  
0.97  
5000  
0.96  
6000  
0.95  
7000  
0.94  
Cooling Capacity  
Multiplier  
KW Correction  
Multiplier  
(Compressors)  
SHR Correction  
Multiplier  
1.00  
1.00  
1.01  
.98  
1.02  
.95  
1.03  
.93  
1.04  
.91  
1.05  
.89  
1.06  
.87  
1.07  
.85  
Maximum  
Condenser  
Ambient  
115 F  
114 F  
113 F  
112 F  
111 F  
110 F  
109 F  
108 F  
Note:  
SHR = Sensible Heat Ratio  
Table PD-3 — Gas Heating Capacity Altitude Correction Factors  
Altitude (Ft.)  
Sea Level  
To 2000  
2001  
To 2500  
2501  
To 3500  
3501  
To 4500  
4501  
To 5500  
5501  
To 6500  
6501  
To 7500  
Capacity  
Multiplier  
1.00  
.92  
.88  
.84  
.80  
.76  
.72  
Note:  
Correction factors are per AGA Std 221.30 — 1964, Part VI, 6.12. Local codes may supersede.  
18  
RT-PRC007-EN  
Perform ance  
Data  
Table PD-4 — 27 1/2 Ton Gross Cooling Capacities (MBh)  
AmbientTemperature — Deg F  
85  
67  
95  
Entering Wet BulbTemperature — Deg F  
67 73 61 67  
105  
115  
67  
Ent  
DB  
61  
73  
61  
73  
61  
73  
CFM (F) TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC  
75  
8000 80  
85  
291 228 323 185 358 130  
294 268 324 220 359 171  
301 301 325 258 360 210  
317 317 328 297 361 248  
278 221 309 174 343 123  
281 261 310 212 343 164  
290 290 311 251 344 203  
306 306 315 290 345 241  
265 213 295 167 327 116  
268 253 296 205 327 157  
278 278 297 243 329 196  
294 294 301 283 330 234  
251 206 279 159 310 109  
255 246 280 197 311 149  
266 266 282 236 312 188  
282 282 286 275 313 226  
90  
75  
9000 80  
85  
299 242 331 189 367 133  
302 286 332 232 367 178  
314 314 334 275 368 221  
331 331 338 319 369 264  
285 235 316 182 351 126  
290 279 318 225 351 171  
302 302 319 268 352 215  
319 319 324 312 354 256  
272 227 301 175 334 119  
276 272 303 217 335 164  
290 290 305 260 336 208  
306 306 310 304 337 249  
257 219 286 168 316 112  
261 261 287 209 317 157  
277 277 289 252 319 201  
293 293 293 293 320 241  
90  
75  
10000 80  
85  
305 255 337 197 373 136  
310 304 339 244 374 185  
325 325 341 291 375 233  
343 343 346 340 376 279  
292 248 322 190 357 129  
297 297 324 237 358 178  
313 313 326 284 359 226  
330 330 332 332 360 271  
277 240 307 183 339 122  
283 283 308 229 341 171  
300 300 311 276 342 219  
317 317 317 317 343 264  
263 232 291 176 322 115  
270 270 292 221 323 164  
287 287 295 268 324 212  
304 304 303 303 326 256  
90  
75  
11000 80  
85  
311 268 343 205 379 139  
316 316 344 255 380 192  
335 335 347 307 381 245  
353 353 353 353 383 293  
297 260 327 198 362 132  
304 304 329 248 363 185  
322 322 332 300 364 237  
340 340 340 340 366 286  
282 253 311 191 344 125  
291 291 313 240 345 178  
309 309 317 292 347 230  
327 327 327 327 349 278  
268 245 295 183 326 117  
278 278 297 232 327 170  
295 295 301 284 329 220  
313 313 312 312 331 270  
90  
75  
12100 80  
85  
316 281 348 223 384 142  
325 325 349 268 385 199  
344 344 353 324 387 254  
364 364 363 363 388 309  
302 274 332 216 366 135  
312 312 334 260 368 192  
331 331 338 317 369 246  
350 350 350 350 372 301  
287 266 316 208 348 128  
299 299 318 252 350 185  
317 317 322 309 352 239  
336 336 336 336 354 294  
272 258 299 200 330 121  
285 285 301 244 331 176  
303 303 306 301 333 231  
321 321 321 321 336 286  
90  
Notes:  
1. All capacities shown are gross and have not considered indoor fan heat. To obtain net cooling, subtract indoor fan heat.  
2. TGC = Total gross capacity.  
3. SHC = Sensible heat capacity.  
Table PD-5— 30Ton Gross Cooling Capacities (Mbh)  
AmbientTemperature — Deg F  
85  
95  
Entering Wet Bulb Temperature — Deg F  
67 73 61 67  
105  
115  
Ent  
DB  
61  
67  
73  
61  
73  
61  
67  
73  
CFM (F) TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC  
75  
9000 80  
85  
323 255 358 207 397 144  
326 299 359 245 398 190  
335 335 361 288 399 234  
352 352 364 332 400 276  
309 247 343 194 380 137  
313 291 344 237 381 182  
323 323 346 280 382 227  
340 340 349 324 383 269  
295 239 327 186 362 129  
298 283 328 229 363 175  
310 310 330 272 364 219  
327 327 334 316 365 261  
279 230 310 178 344 122  
284 275 311 221 345 167  
297 297 313 264 345 210  
313 313 318 308 347 252  
90  
75  
10000 80  
85  
331 268 366 210 405 147  
335 317 367 257 406 197  
347 347 369 304 407 246  
366 366 374 353 408 292  
316 260 350 202 387 140  
321 309 351 249 388 189  
334 334 353 296 389 238  
353 353 358 345 391 284  
301 252 333 194 369 132  
306 301 335 241 370 182  
321 321 337 288 371 230  
339 339 342 337 372 276  
286 243 316 186 350 125  
290 290 318 232 351 174  
307 307 320 280 352 222  
325 325 324 324 353 267  
90  
75  
11000 80  
85  
337 281 372 218 411 150  
343 335 374 269 412 204  
358 358 376 321 413 257  
378 378 382 374 415 306  
322 273 356 210 393 143  
328 327 357 261 394 196  
345 345 360 312 395 249  
364 364 367 366 397 298  
307 265 339 202 374 135  
312 312 340 252 375 188  
331 331 343 304 377 241  
350 350 349 349 378 290  
291 256 321 194 355 127  
298 298 323 244 356 180  
316 316 326 296 357 233  
335 335 334 334 359 282  
90  
75  
12000 80  
85  
343 294 378 225 417 153  
348 348 379 280 418 210  
368 368 382 336 419 268  
388 388 388 388 421 321  
328 285 361 218 398 145  
334 334 362 272 399 203  
354 354 366 328 401 260  
374 374 374 374 402 313  
312 277 343 210 379 138  
321 321 345 263 380 195  
340 340 349 320 382 252  
359 359 359 359 383 304  
295 268 325 201 359 129  
306 306 327 255 360 187  
325 325 331 311  
362 244  
90  
343 343 343 343 364 296  
75  
13200 80  
85  
349 308 383 246 422 156  
357 357 385 293 423 218  
378 378 389 354 425 278  
399 399 399 399 427 337  
333 300 366 238 403 149  
343 343 368 285 405 210  
364 364 372 346 406 270  
384 384 384 384 408 329  
317 291 348 229 383 141  
329 329 350 276 385 202  
349 349 355 338 387 261  
369 369 369 369 389 321  
300 283 329 221 363 133  
314 314 332 268 365 194  
333 333 337 329 366 253  
353 353 352 352 369 312  
90  
Notes:  
1. All capacities shown are gross and have not considered indoor fan heat. To obtain net cooling, subtract indoor fan heat.  
2. TGC = Total gross capacity.  
3. SHC = Sensible heat capacity.  
RT-PRC007-EN  
19  
Perform ance  
Data  
Table PD-6 — 35Ton Gross Cooling Capacities (Mbh)  
AmbientTemperature — Deg F  
85  
95  
Entering Wet Bulb Temperature — Deg F  
67 73 61 67  
105  
115  
67  
Ent  
DB  
61  
67  
73  
61  
73  
61  
73  
CFM (F) TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC  
75  
10500 80  
85  
377 310 416 240 459 166  
383 367 417 296 460 224  
398 398 420 351 461 281  
419 419 426 409 462 336  
361 301 398 231 438 158  
366 359 399 287 439 216  
383 383 402 343 440 272  
404 404 408 400 442 327  
343 291 379 223 417 150  
350 349 380 278 418 207  
368 368 383 333 419 263  
388 388 388 388 421 317  
325 282 359 214 396 141  
332 332 360 268 397 198  
352 352 364 324 397 254  
371 371 371 371 399 308  
90  
75  
12000 80  
85  
387 332 425 258 468 171  
393 393 427 315 469 236  
415 415 431 379 470 300  
437 437 437 437 472 361  
370 322 406 249 447 162  
378 378 408 306 448 227  
399 399 412 370 449 290  
421 421 421 421 451 352  
352 313 387 240 425 154  
362 362 388 297 426 218  
383 383 393 361 427 281  
404 404 404 404 430 342  
334 303 366 231 403 145  
346 346 368 288 404 209  
366 366 373 351 405 271  
386 386 386 386 408 333  
90  
75  
13000 80  
85  
393 346 430 261 473 173  
402 402 432 328 475 243  
425 425 437 397 476 312  
448 448 448 448 478 377  
375 337 411 253 452 165  
387 387 413 319 453 234  
409 409 418 388 454 303  
431 431 431 431 457 368  
357 327 391 244 429 156  
370 370 393 310 430 225  
392 392 399 378 432 294  
413 413 413 413 435 359  
339 317 370 234 406 147  
353 353 372 300 408 216  
374 374 379 369 409 285  
395 395 395 395 412 349  
90  
75  
14000 80  
85  
398 360 435 270 478 176  
410 410 437 341 479 250  
434 434 443 414 480 324  
458 458 457 457 484 393  
380 351 415 261 456 167  
394 394 417 332 457 241  
417 417 423 405 458 315  
440 440 440 440 462 384  
362 341 395 252 433 159  
378 378 397 322 434 232  
400 400 404 396 436 306  
422 422 422 422 440 375  
343 331 373 243 410 150  
360 360 376 312  
411 223  
381 381 381 381 413 297  
403 403 403 403 417 365  
90  
75  
14400 80  
85  
400 365 436 272 479 177  
413 413 439 346 481 253  
437 437 445 421 482 326  
461 461 461 461 486 400  
382 356 416 263 457 168  
397 397 419 336 459 244  
420 420 426 412 460 317  
443 443 443 443 464 390  
364 346 396 254 434 160  
380 380 399 327 436 235  
402 402 406 402 437 308  
425 425 425 425 442 381  
345 337 375 244  
411 151  
363 363 378 317 412 226  
384 384 384 384 414 298  
406 406 406 406 419 371  
90  
Notes:  
1. All capacities shown are gross and have not considered indoor fan heat. To obtain net cooling, subtract indoor fan heat.  
2. TGC = Total gross capacity.  
3. SHC = Sensible heat capacity.  
Table PD-7 — 40Ton Gross Cooling Capacities (Mbh)  
AmbientTemperature — Deg F  
85  
67  
95  
Entering Wet Bulb Temperature — Deg F  
67 73 61 67  
105  
115  
Ent  
DB  
61  
73  
61  
73  
61  
67  
73  
CFM (F) TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC  
75  
12000 80  
85  
460 365 510 288 565 202  
466 432 511 351 566 269  
480 480 515 415 567 333  
506 506 521 480 568 398  
439 353 486 276 539 190  
445 419 487 338 540 257  
461 461 491 402 541 322  
487 487 498 468 543 385  
416 340 462 263 512 178  
423 406 463 325 513 244  
441 441 467 390 515 309  
467 467 475 455 517 373  
393 327 436 250 484 166  
401 393 438 312 486 232  
421 421 442 376 487 297  
445 445 450 442 489 360  
90  
75  
14000 80  
85  
476 396 525 304 580 208  
484 473 526 378 581 284  
506 506 532 453 582 359  
535 535 541 529 585 432  
453 383 500 291 553 196  
463 461 502 365 554 272  
486 486 508 440 556 347  
514 514 518 517 559 420  
430 370 474 279 525 184  
438 438 477 352 526 260  
465 465 482 427 528 335  
492 492 492 492 531 407  
406 357 448 266 496 172  
417 417 450 339 497 248  
443 443 457 414 499 321  
470 470 469 469  
90  
75  
15000 80  
85  
482 411 530 317 586 211  
489 489 533 391 587 292  
518 518 539 471 588 372  
547 547 546 546 591 449  
459 398 505 305 558 199  
469 469 508 379 560 280  
497 497 514 458 561 360  
525 525 525 525 565 437  
436 385 479 292 530 187  
448 448 482 366 531 268  
475 475 489 445 533 346  
503 503 503 503 537 424  
411 371 452 279  
426 426 456 352  
453 453 463 432  
480 480 480 480  
90  
75  
16000 80  
85  
488 425 536 321 591 213  
499 499 539 405 592 299  
528 528 546 489 593 383  
558 558 558 558 597 466  
465 412 510 309 563 202  
478 478 513 392 565 287  
507 507 521 477 566 371  
536 536 536 536 571 453  
441 399 484 296 534 189  
457 457 487 379 536 275  
485 485 495 463 538 358  
513 513 513 513 543 440  
416 385 456 282  
434 434 460 365  
461 461 469 450  
489 489 489 489  
90  
75  
17600 80  
85  
497 448 543 335 598 217  
513 513 547 425 599 311  
543 543 555 518 601 401  
574 574 574 574 606 492  
473 435 517 322 570 206  
491 491 521 412 572 299  
521 521 530 505 574 389  
551 551 551 551 579 479  
449 422 490 308 541 193  
469 469 495 399 543 286  
498 498 504 492 545 376  
527 527 527 527 551 466  
424 408 462 295  
446 446 467 385  
474 474  
474 474  
90  
Notes:  
1. All capacities shown are gross and have not considered indoor fan heat. To obtain net cooling, subtract indoor fan heat.  
2. TGC = Total gross capacity.  
3. SHC = Sensible heat capacity.  
20  
RT-PRC007-EN  
Perform ance  
Data  
Table PD-8 — 50Ton Gross Cooling Capacities (MBh)  
AmbientTemperature — Deg F  
85  
67  
95  
Entering Wet Bulb Temperature — Deg F  
67 73 61 67  
105  
115  
67  
Ent  
DB  
61  
73  
61  
73  
61  
73  
CFM (F) TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC  
75  
15000 80  
85  
556 459 614 356 679 244  
565 547 616 439 680 331  
590 590 622 524 682 417  
623 623 631 611 684 500  
529 444 585 342 647 230  
539 533 588 424 649 318  
567 567 593 509 651 403  
599 599 604 597 654 486  
502 429 555 327 614 216  
511 511 558 409 616 303  
542 542 564 494 618 389  
574 574 574 574 622 471  
475 414 524 312  
487 487 527 394  
517 517 534 479  
547 547 547 547  
90  
75  
17000 80  
85  
570 491 627 373 691 250  
581 581 630 468 693 348  
615 615 637 564 694 443  
650 650 649 649 698 536  
543 476 597 359 659 236  
557 557 601 453 661 334  
590 590 608 549 662 429  
624 624 624 624 667 522  
515 460 566 344 625 222  
532 532 570 437 627 320  
565 565 578 534 629 414  
597 597 597 597 634 507  
486 445 533 328  
506 506 538 422  
538 538 547 518  
90  
75  
18000 80  
85  
576 506 633 386 696 252  
591 591 636 482 698 355  
626 626 644 583 699 455  
661 661 661 661 703 554  
548 491 602 371 663 239  
566 566 606 467 666 342  
601 601 615 568 668 441  
635 635 635 635 673 540  
520 476 570 356 629 224  
541 541 575 451 632 327  
574 574 584 553 634 426  
608 608 607 607 640 525  
491 460 538 340  
514 514 543 436  
547 547 553 537  
90  
75  
19000 80  
85  
581 522 638 391 701 255  
600 600 642 495 702 363  
636 636 651 602 704 467  
671 671 671 671 709 571  
554 507 607 377 668 241  
575 575 611 480 670 350  
610 610 621 587 673 453  
645 645 645 645 678 557  
525 491 575 362 633 227  
549 549 580 465 636 335  
583 583 590 572 639 438  
617 617 617 617 645 543  
496 475 542 345  
522 522 547 449  
555 555 559 556  
90  
75  
20000 80  
85  
587 537 642 400 705 257  
609 609 647 509 707 371  
645 645 657 621 708 479  
681 681 681 681 714 589  
559 522 611 386 672 244  
583 583 616 494 674 357  
619 619 627 606 677 465  
654 654 654 654 683 575  
530 506 579 371 637 230  
557 557 584 478 640 343  
591 591 596 591 643 450  
626 626 626 626 650 560  
501 490 545 353  
529 529 551 463  
563 563 562 562  
90  
Notes:  
1. All capacities shown are gross and have not considered indoor fan heat. To obtain net cooling, subtract indoor fan heat.  
2. TGC = Total gross capacity.  
3. SHC = Sensible heat capacity.  
RT-PRC007-EN  
21  
Perform ance  
Data  
Table PD-9 — Electric Heat AirTemperature Rise  
KW  
Input  
36  
54  
72  
Total  
MBH  
123  
184  
246  
Cfm  
14000  
8.1  
12.1  
16.2  
20.2  
24.3  
8000  
14.2  
21.2  
28.3  
35.4  
—
9000  
12.6  
18.9  
25.2  
31.5  
—
10000  
11.3  
17.0  
22.6  
28.3  
—
11000  
10.3  
15.4  
20.6  
25.7  
—
12000  
9.4  
14.2  
18.9  
23.6  
28.3  
13000  
8.7  
13.1  
17.4  
21.8  
26.1  
15000  
7.6  
11.3  
15.1  
18.9  
22.6  
16000  
—
10.6  
14.2  
17.7  
21.2  
17000  
—
10.0  
13.3  
16.7  
20.0  
18000  
—
9.4  
12.6  
15.7  
18.9  
19000  
—
8.9  
11.9  
14.9  
17.9  
20000  
—
8.5  
11.3  
14.2  
17.0  
90  
108  
307  
369  
Notes:  
1. Air tem perature rise = (KW x 3413)/(scfm x 1.085).  
2. All heaters on constant volum e units provide 2 increm ents of capacity. All VAV units provide 1 step of heating capacity.  
3. Air tem perature rise in this table are based on heater operating at 240, 480 or 600 volts.  
Table PD-10 —Available Electric Heat KW Ranges  
Nominal  
Unit Size  
Tons  
Nominal Voltage  
208  
27-41  
27-41  
27-41  
41  
240  
36-54  
36-54  
36-54  
54  
480  
600  
27½  
30.0  
36-90 54-90  
36-90 54-90  
36-90 54-90  
54-108 54-108  
54-108 54-108  
35.0  
40.0  
50.0  
41  
54  
Notes:  
1. KW ranges in this table are based on heater operating at 208, 240, 480, and 600 volts.  
2
Applied Voltage  
2. For other than rated voltage, KW =  
x Rated KW.  
(
)
Rated Voltage  
3. Electric heaters up to 54 KW are single element heaters, those above 54 KW are dual element heaters.  
Table PD-11 — Natural Gas Heating Capacities  
Heat Input MBH  
(See Note 1)  
Heating Output MBH  
(See Note 1)  
Tons  
Unit Model No.  
YCD/YCH330**L  
AirTemp. Rise, F  
10-40  
27½-35  
YCD/YCH360**L  
350,000/250,000  
600,000/425,000  
283,500/202,500  
486,000/344,500  
YCD/YCH420**L  
YCD/YCH330**H  
27½-35  
40-50  
YCD/YCH360**H  
25-55  
YCD/YCH420**H  
YCD/YCH480**L  
YCD/YCH600**L  
YCD/YCH480**H  
400,000/300,000  
800,000/600,000  
324,000/243,000  
648,000/486,000  
5-35  
40-50  
Note:  
YCD/YCH600**H  
20-50  
1. Second stage is total heating capacity. Second Stage/First Stage.  
22  
RT-PRC007-EN  
Perform ance  
Data  
Table PD-12 — Supply Fan Performance — 27½ - 35Ton  
Static Pressure (in. wg)1  
1.25  
0.25  
RPM  
0.50  
0.75  
BHP RPM  
1.00  
1.50  
1.75  
BHP RPM  
2.00  
RPM  
2.25  
RPM  
SCFM  
8000  
BHP  
1.39  
1.60  
1.84  
2.10  
2.39  
2.71  
3.07  
3.46  
3.89  
4.34  
4.84  
5.36  
5.91  
6.51  
RPM  
401  
412  
423  
435  
448  
461  
474  
488  
501  
515  
528  
542  
555  
570  
BHP RPM  
BHP  
RPM  
552  
556  
561  
568  
576  
585  
597  
608  
619  
630  
641  
652  
664  
676  
BHP RPM  
BHP  
4.80  
5.09  
5.41  
5.74  
6.11  
6.50  
6.93  
7.41  
BHP  
5.51  
5.83  
6.16  
6.51  
6.89  
7.30  
7.73  
8.20  
8.73  
9.30  
9.93  
BHP  
6.24  
6.59  
6.94  
7.31  
341  
355  
368  
382  
396  
410  
425  
440  
455  
470  
485  
501  
516  
532  
1.85  
2.08  
2.35  
2.64  
2.96  
3.31  
3.68  
4.08  
4.52  
4.98  
5.47  
6.00  
6.58  
7.20  
451  
462  
473  
484  
495  
506  
518  
530  
542  
555  
569  
582  
595  
609  
2.30  
2.58  
2.88  
3.20  
3.53  
3.89  
4.29  
4.72  
5.19  
5.69  
6.23  
6.79  
7.40  
501  
508  
516  
526  
537  
549  
560  
571  
582  
593  
605  
617  
630  
643  
2.84  
3.09  
3.39  
3.73  
4.12  
4.53  
4.95  
5.39  
5.86  
6.38  
6.94  
7.54  
3.45  
3.71  
4.00  
4.32  
4.69  
5.10  
5.57  
6.08  
6.60  
7.13  
599  
602  
606  
611  
616  
623  
631  
641  
652  
664  
675  
686  
697  
708  
4.11  
4.38  
4.68  
5.00  
5.36  
5.76  
6.20  
6.71  
7.27  
7.87  
8.49  
9.12  
9.78  
644  
686  
688  
691  
694  
697  
701  
705  
711  
718  
726  
734  
726  
728  
730  
732  
735  
738  
742  
747  
752  
758  
765  
774  
784  
795  
8500  
9000  
9500  
646  
649  
653  
657  
662  
668  
676  
684  
694  
706  
717  
729  
740  
10000  
10500  
11000  
11500  
12000  
12500  
13000  
13500  
14000  
14500  
7.71  
8.13  
8.58  
9.06  
9.57  
10.14  
10.76  
11.43  
12.19  
13.02  
7.95  
8.55  
9.21  
9.91  
10.64  
11.38  
7.69  
8.29  
8.95  
9.65  
745 10.65  
757 11.42  
768 12.22  
8.18  
8.85  
8.04  
10.48  
Notes:  
1. Fan perform ance table includes internal resistances of cabinet, and 2” standard filters. For other com ponents refer to com ponent static pressure drop table. Add the  
pressure drops from any additional com ponents to the duct (external) static pressure, enter the table, and select m otor bhp.  
2. The pressure drop from the supply fan to the space cannot exceed 2.25”.  
3. Maxim um air flow for 27½ ton — 12,100 cfm , 30 ton — 13,200 cfm , 35 ton — 14,400 cfm .  
4. Maxim um m otor horsepower for 27½ ton — 10 hp, 30 ton — 10 hp, 35 ton — 15 hp.  
Figure PD-2  
4.2  
800 rpm  
0% wocfm  
3.8  
750 rpm  
700 rpm  
15 HP  
50% wocfm  
3.4  
3.0  
2.6  
2.2  
1.8  
1.4  
1.0  
0.6  
0.2  
10 HP  
650 rpm  
600 rpm  
60% wocfm  
7.5 HP  
550 rpm  
500 rpm  
70% wocfm  
5 HP  
3 HP  
450 rpm  
400 rpm  
80% wocfm  
90% wocfm  
0
2000  
4000  
6000  
8000  
10000  
12000  
CFM  
14000  
16000  
18000  
20000  
22000  
24000  
RT-PRC007-EN  
23  
Perform ance  
Data  
Table PD-13 — Supply Fan Performance — 40 and 50Ton  
Static Pressure (in. wg)1  
1.25 1.50  
SCFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP  
0.25  
0.50  
0.75  
1.00  
1.75  
2.00  
2.25  
2.50  
12000  
13000  
365  
388  
3.02 408  
3.73 427  
3.66  
4.40  
448 4.32  
468 5.13  
485  
501  
4.99  
5.84  
522 5.70  
536 6.57  
556  
569  
6.44  
7.34  
588  
601  
7.20 620  
8.15 631  
7.96  
652  
660  
672  
8.75  
9.80  
682 9.56  
690 10.66  
8.96  
14000  
15000  
16000  
17000  
18000  
19000  
412  
436  
460  
485  
509  
534  
4.54 448  
5.46 471  
6.53 493  
7.72 516  
9.06 540  
10.54 563  
5.26  
6.25  
7.36  
8.59  
9.97  
11.50  
486 6.03  
505 7.04  
525 8.17  
546 9.46  
568 10.91  
590 12.49  
520  
540  
559  
577  
596  
617  
6.80  
7.89  
9.08  
10.39  
11.84  
551 7.57  
569 8.70  
588 9.96  
608 11.36  
584  
599  
615  
8.36  
9.54  
10.83  
615  
629  
643  
9.21 643  
10.40 658  
10.06  
11.31  
10.96  
699 11.86  
711 13.15  
685 12.21  
11.73 672 12.66 699 13.60 724 14.58  
14.17 713 15.15 739 16.16  
14.84 702 15.83 728 16.85 753 17.88  
634 12.28 659 13.20 687  
627 12.88 654 13.86 678  
674 15.60 697 16.64 719  
17.45 717 18.57 739  
13.45 645 14.51  
17.64  
743  
18.71  
768 19.79  
20000  
Notes:  
560 12.18 587 13.18  
613 14.24 638 15.25 664 16.31 692  
19.66  
760  
20.74  
783 21.85  
1. Fan perform ance table includes internal resistances of cabinet, and 2” standard filters. For other com ponents refer to com ponent static pressure drop table. Add the  
pressure drops from any additional com ponents to the duct (external) static pressure, enter the table, and select m otor bhp.  
2. The pressure drop from the supply fan to the space cannot exceed 2.50”.  
3. Maxim um air flow for 40 ton — 17,600 cfm , 50 ton — 20,000 cfm .  
4. Maxim um m otor horsepower for 40 ton — 15 hp, 50 ton — 20 hp.  
Figure PD-3  
4.0  
7
5
M
0
F
R
P
C
M
O
W
3.5  
%
0
5
3.0  
2.5  
M
F
C
5
O
5
0
W
2.0  
1.5  
1.0  
0.5  
0.0  
R
%
P
0
M
8
5
0
0
1
R
5
P
M
H
P
4
5
0
R
P
M
7
.
5
M
F
H
C
O
P
W
%
0
9
0
2000  
4000  
6000  
8000  
10000  
12000  
14000  
CFM  
16000  
18000  
20000  
22000  
24000  
26000  
28000  
24  
RT-PRC007-EN  
Perform ance  
Data  
Table PD-14 — Component Static Pressure Drops (in.W.G.)1  
Heating System  
Filters2  
High Eff. Filters  
Nominal  
Tons  
CFM  
Std Air  
8000  
Gas Heat  
Electric Heat3  
1 Element 2 Element  
0.05  
0.07  
0.08  
0.10  
ID Coil  
Adder  
0.00  
Inlet Guide  
Vanes  
Low  
0.08  
High  
2”  
4”  
0.03  
Economizer  
0.04  
0.06  
0.08  
0.10  
0.12  
0.06  
0.07  
0.09  
0.11  
0.04  
0.05  
0.06  
0.08  
0.05  
9000  
10000  
11000  
0.10  
0.13  
0.15  
0.00  
0.00  
0.00  
0.04  
0.05  
0.05  
0.07  
0.08  
0.10  
0.04  
0.05  
0.06  
27½  
12000  
9000  
0.18  
0.10  
0.14  
0.08  
0.12  
0.07  
0.13  
0.07  
0.00  
0.00  
0.09  
0.05  
0.07  
0.04  
0.12  
0.07  
0.07  
0.04  
10000  
11000  
12000  
0.13  
0.15  
0.18  
0.10  
0.12  
0.14  
0.08  
0.10  
0.12  
0.09  
0.11  
0.13  
0.00  
0.00  
0.00  
0.06  
0.08  
0.09  
0.05  
0.05  
0.07  
0.08  
0.10  
0.12  
0.05  
0.06  
0.07  
30  
13000  
10500  
0.21  
0.14  
0.16  
0.11  
0.14  
0.09  
0.15  
0.10  
0.00  
0.11  
0.11  
0.07  
0.08  
0.05  
0.14  
0.09  
0.09  
0.06  
11500  
12500  
13500  
0.17  
0.20  
0.23  
0.13  
0.15  
0.18  
0.11  
0.13  
0.15  
0.12  
0.14  
0.16  
0.12  
0.14  
0.16  
0.08  
0.10  
0.11  
0.06  
0.07  
0.08  
0.11  
0.13  
0.15  
0.07  
0.08  
0.10  
35  
14500  
12000  
0.26  
0.01  
0.20  
0.03  
0.18  
0.08  
0.19  
0.13  
0.18  
0.00  
0.13  
0.09  
0.10  
0.07  
0.18  
0.04  
0.11  
0.07  
13000  
14000  
15000  
16000  
0.01  
0.02  
0.02  
0.02  
0.04  
0.05  
0.05  
0.06  
0.10  
0.11  
0.13  
0.15  
0.15  
0.18  
0.20  
0.23  
0.00  
0.00  
0.00  
0.00  
0.11  
0.12  
0.14  
0.16  
0.08  
0.09  
0.10  
0.12  
0.05  
0.05  
0.06  
0.07  
0.08  
0.09  
0.10  
0.11  
40  
50  
17000  
15000  
0.02  
0.02  
0.07  
0.05  
0.17  
0.13  
0.26  
0.20  
0.00  
0.12  
0.18  
0.14  
0.13  
0.10  
0.08  
0.06  
0.12  
0.10  
16000  
17000  
18000  
19000  
20000  
0.02  
0.02  
0.03  
0.03  
0.03  
0.06  
0.07  
0.08  
0.08  
0.09  
0.15  
0.17  
0.19  
0.21  
0.23  
0.23  
0.26  
0.29  
0.32  
0.36  
0.13  
0.15  
0.16  
0.18  
0.19  
0.16  
0.18  
0.20  
0.23  
0.25  
0.12  
0.13  
0.15  
0.16  
0.18  
0.07  
0.08  
0.09  
0.10  
0.11  
0.11  
0.12  
0.14  
0.16  
0.18  
Notes:  
1. Static pressure drops of accessory com ponents m ust be added to external static pressure to enter fan selection tables.  
2. Throwaway filter option lim ited to 300 ft/m in face velocity.  
3. Electric Heaters 36-54 KW contain 1 elem ent; 72-108 KW 2 elem ents.  
RT-PRC007-EN  
25  
Perform ance  
Data  
Table PD-15 — Supply Air Fan Drive Selections  
7.5 HP  
10 HP  
15 HP  
20 HP  
Nominal  
Tons  
Drive  
No  
Drive  
No  
Drive  
No  
Drive  
No  
RPM  
550  
600  
650  
700  
750  
550  
600  
650  
700  
750  
600  
650  
700  
790  
800  
500  
525  
575  
625  
675  
725  
525  
575  
625  
675  
725  
RPM  
RPM  
RPM  
A
B
C
27½T  
700  
D
E
750*  
A
B
C
30T  
700  
750  
D
E
B
650  
700  
C
D
35T  
790**  
800*  
F
G
500  
525  
575  
H
J
K
40T  
50T  
625  
675  
725  
L
M
N
525  
575  
J
K
625  
675  
L
M
725  
N
Note:  
*For YC gas/electrics only.  
**For TC and TE Cooling only and with electric heat units only.  
26  
RT-PRC007-EN  
Perform ance  
Data  
Table PD-16— Power Exhaust Fan Performance  
Exhaust  
Airflow  
(Cfm)  
External Static Pressure — Inches ofWater  
High Speed  
ESP  
Med Speed  
ESP  
Low Speed  
ESP  
3500  
4000  
4500  
5000  
5500  
6000  
6500  
7000  
7500  
8000  
8500  
9000  
9500  
10000  
10500  
11000  
11500  
12000  
0.900  
0.860  
0.820  
0.780  
0.745  
0.700  
0.660  
0.610  
0.560  
0.505  
0.445  
0.385  
0.320  
0.255  
0.190  
0.125  
0.065  
0.005  
—
—
—
—
—
—
—
0.400  
0.380  
0.360  
0.330  
0.300  
0.260  
0.215  
0.170  
0.120  
0.070  
0.020  
—
—
—
—
0.400  
0.365  
0.330  
0.300  
0.255  
0.210  
0.165  
0.125  
0.060  
0.000  
—
—
—
—
Notes:  
1. Perform ance in table is with both m otors operating.  
2. High speed = both m otors on high speed. Medium speed is one m otor on high speed and one on low speed.  
Low speed is both m otors on low speed.  
3. Power Exhaust option is not to be applied on system s that have m ore return air static pressure drop than the  
m axim um shown in the table for each m otor speed tap.  
RT-PRC007-EN  
27  
Controls  
Variable Frequency Drives (VFD) Control  
fresh air dampers drive to the minimum  
open position. A field adjustable  
potentiometer on the Unitary  
Economizer Module,Tracer®, or a  
remote potentiometer can provide the  
input to establish the minimum damper  
position.  
VAV Units Only  
Sequence of Operation  
1
Variable frequency drives are driven by a  
modulating 0-10 vdc signal from the VAV  
module. A pressure transducer  
measures duct static pressure, and the  
VFD is modulated to maintain the supply  
air static pressure within an adjustable  
user-defined range. The range is  
Supply Air Pressure Control  
Inlet Guide Vane Control  
Inlet guide vanes are driven by a  
modulating 2-10 vdc signal from the VAV  
Module. A pressure transducer  
At outdoor air conditions above the  
enthalpy control setting, primary cooling  
only is used and the fresh air dampers  
remain at minimum position.  
determined by the supply air pressure  
setpoint and supply air pressure  
measures duct static pressure, and the  
inlet guide vanes are modulated to  
maintain the supply air static pressure  
within an adjustable user-defined range.  
The range is determined by the supply  
air pressure setpoint and supply air  
pressure deadband, which are set  
through a unit mounted potentiometer.  
deadband, which are set through a unit  
mounted potentiometer. Variable  
frequency drives provide supply fan  
motor speed modulation. The drive will  
accelerate or decelerate as required to  
maintain the supply static pressure  
setpoint. When subjected to high  
ambient return conditions the VFD shall  
reduce its output frequency to maintain  
operation. Bypass control is offered to  
provide full nominal airflow in the event  
of drive failure.  
If the unit does not include an  
economizer, primary cooling only is used  
to satisfy cooling requirements.  
Supply Air Setpoint Reset  
Supply air reset can be used to adjust  
the supply air temperature setpoint on  
the basis of a zone temperature, return  
air temperature, or on outdoor air  
temperature. Supply air reset adjustment  
is available on the unit mounted VAV  
Setpoint Panel for supply air cooling  
control.  
Inlet guide vane assemblies installed on  
the supply fan inlets regulate fan  
capacity and limit horsepower at lower  
system air requirements. When in any  
position other than full open, the vanes  
pre-spin intake air in the same direction  
as supply fan rotation. As the vanes  
approach the full-closed position, the  
amount of “spin” induced by the vanes  
increases at the same time that intake  
airflow and fan horsepower diminish.  
The inlet guide vanes will close when the  
supply fan is shut down.  
2
Supply AirTemperature Controls  
Cooling/Economizer  
a
Reset Based on Outdoor AirTemperature  
During occupied cooling mode of  
operation, the economizer (if available)  
and primary cooling are used to control  
the supply air temperature.The supply  
air temperature setpoint is user-defined  
at the unit mounted VAV Setpoint Panel  
or at the remote panel. If the enthalpy of  
the outside air is appropriate to use “free  
cooling,” the economizer will be used  
first to attempt to satisfy the supply  
setpoint.  
Outdoor air cooling reset is sometimes  
used in applications where the outdoor  
temperature has a large effect on  
building load. When the outside air  
temperature is low and the building  
cooling load is low, the supply air  
setpoint can be raised, thereby  
preventing subcooling of critical zones.  
This reset can lower usage of primary  
cooling and result in a reduction in  
primary cooling energy usage.  
Supply Air Static Pressure Limit  
The opening of the inlet guide vanes and  
VAV boxes are coordinated, with respect  
to time, during unit start up and  
transition to/from Occupied/Unoccupied  
modes to prevent overpressurization of  
the supply air ductwork. However, if for  
any reason the supply air pressure  
exceeds the fixed supply air static  
pressure limit of 3.5” W.C., the supply  
fan is shut down and the inlet guide  
vanes are closed.The unit is then  
allowed to restart four times. If the  
overpressurization condition occurs on  
the fifth time, the unit is shut down and a  
manual reset diagnostic is set and  
displayed at any of the remote panels  
with LED status lights or communicated  
to the Integrated Comfort system.  
On units with economizer, a call for  
cooling will modulate the fresh air  
There are two user-defined parameters  
that are adjustable through the VAV  
Setpoint Panel: reset temperature  
setpoint and reset amount.The amount  
of reset applied is dependent upon how  
far the outdoor air temperature is below  
the supply air reset setpoint.The amount  
is zero where they are equal and  
dampers open.The rate of economizer  
modulation is based on deviation of the  
discharge temperature from setpoint,  
i.e., the further away from setpoint, the  
faster the fresh air damper will open.  
Note that the economizer is only allowed  
to function freely if ambient conditions  
are below the enthalpy control setting or  
below the return air enthalpy if unit has  
comparative enthalpy installed. If outside  
air is not suitable for “economizing,” the  
increases linearly toward the value set at  
the reset amount input.The maximum  
value is 20 F. If the outdoor air  
temperature is more than 20 F below the  
28  
RT-PRC007-EN  
Controls  
reset temperature setpoint the amount  
of reset is equal to the reset amount  
setpoint.  
Morning Warm-up setpoint is set at the  
unit mounted VAV Setpoint panel or at a  
remote panel.  
not suitable for “economizing,” the fresh  
air dampers drive to the minimum open  
position. A field adjustable  
potentiometer on the Unitary  
b
Morning Warm-up (MWU)  
Economizer Module (UEM),Tracer or a  
remote potentiometer can provide the  
input to establish the minimum damper  
position.  
Reset Based On Zone Or Return  
Temperature  
Morning warm-up control (MWU) is  
activated whenever the unit switches  
from unoccupied to occupied and the  
zone temperature is at least 1.5 F below  
the MWU setpoint.When MWU is  
activated the VAV box output will be  
energized for at least 6 minutes to drive  
all boxes open, the inlet guide vanes are  
driven full open, and all stages of heat  
(gas or electric) are energized. When  
MWU is activated the economizer  
damper is driven fully closed. When the  
zone temperature meets or exceeds the  
MWU setpoint minus 1.5 F, the heat will  
be staged down. When the zone  
Zone or return reset is applied to the  
zone(s) in a building that tend to  
At outdoor air temperatures above the  
enthalpy control setting, primary cooling  
only is used and the outdoor air  
overcool or overheat.The supply air  
temperature setpoint is adjusted based  
on the temperature of the critical zone(s)  
or the return air temperature.This can  
have the effect of improving comfort  
and/or lowering energy usage.The user-  
defined parameters are the same as for  
outdoor air reset.  
dampers remain at minimum position.  
If the unit does not include an  
economizer, primary cooling only is used  
to satisfy cooling requirements.  
Heating  
Logic for zone or return reset control is  
the same except that the origins of the  
temperature inputs are the zone sensor  
or return sensor respectively.The  
amount of reset applied is dependent  
upon how far the zone or return air  
temperature is below the supply air reset  
setpoint.The amount is zero where they  
are equal and increases linearly toward  
the value set at the reset amount  
potentiometer on the VAV Setpoint  
panel.The maximum value is 3 F. If the  
return or zone temperature is more than  
3 F below the reset temperature setpoint  
the amount of reset is equal to the reset  
amount setpoint.  
Gas Heating  
When heating is required the UCP  
initiates the heating cycle by energizing  
the K5 relay, heating relay(s), and the  
ignition control module(s).The K5 relay  
brings on the combustion fan motor.The  
ignition control module(s) begin the  
ignition process by preheating the hot  
surface ignitor(s). After the hot surface  
ignitor is preheated the gas valve is  
opened to ignite first stage. If ignition  
does not take place the ignition control  
module(s) will attempt to ignite 2 more  
times before locking out. When ignition  
does occur the hot surface ignitor is  
deenergized and then functions as a  
flame sensor.The UCP will energize the  
supply fan contactor 45 seconds after the  
initiation of the heat cycle. If more  
temperature meets or exceeds the MWU  
setpoint then MWU will be terminated  
and the unit will switch over to VAV  
cooling.  
CV Units Only  
Sequence of Operation  
1
Occupied Zone Temperature Control  
Cooling/Economizer  
During occupied cooling mode, the  
economizer (if provided) and primary  
cooling are used to control zone  
temperature. If the enthalpy of outside  
air is appropriate to use “free cooling”,  
the economizer will be used first to  
attempt to satisfy the cooling zone  
temperature setpoint; then primary  
cooling will be staged up as necessary.  
3
Zone Temperature Control  
Unoccupied Zone Heating and Cooling  
capacity is needed to satisfy the heating  
setpoint, the UCP will call for the second  
stage of heat by driving the combustion  
blower motor to high speed.  
During Unoccupied mode, the unit is  
operated as a CV unit. Inlet guide vanes  
and VAV boxes are driven full open.The  
unit controls zone temperature to the  
Unoccupied zone cooling and heating  
(heating units only) setpoints.  
On units with economizer, a call for  
cooling will modulate the fresh air  
When the space temperature rises above  
the heating setpoint, the UCP  
deenergizes the K5 relay, the heating  
relays, and the ignition control module,  
terminating the heat cycle.  
dampers open.The rate of economizer  
modulation is based on deviation of the  
zone temperature from setpoint, i.e., the  
further away from setpoint, the faster the  
fresh air damper will open. First stage of  
cooling will be allowed to start after the  
economizer reaches full open.  
Daytime Warm-up  
During occupied mode, if the zone  
temperature falls to a temperature three  
degrees below the Morning Warm-up  
setpoint, Daytime Warm-up is initiated.  
The system changes to CV heating (full  
unit airflow), the VAV boxes are fully  
opened and the CV heating algorithm is  
in control until the Morning Warm-up  
setpoint is reached.The unit is then  
returned to VAV cooling mode.The  
Electric Heating  
When heat is required, the UCP initiates  
first stage heating by energizing the first  
stage electric heat contactor.The first  
stage electric heater bank(s) will be  
energized if the appropriate limits are  
closed.The UCP will cycle first stage heat  
on and off as required to maintain zone  
temperature. If first stage cannot satisfy  
Note that the economizer is allowed to  
function freely only if ambient conditions  
are below the enthalpy control setting or  
below the return air enthalpy if unit has  
comparative enthalpy. If outside air is  
RT-PRC007-EN  
29  
Controls  
the requirement, the UCP will energize  
the second stage electric heat  
contactor(s) if the appropriate limits are  
closed.The UCP will cycle second stage  
on and off as required while keeping  
stage one energized.  
rises to 10 F above the occupied zone  
heating temperature setpoint.  
CTI provides zone temperature control  
only and is mutually exclusive of the  
Trane Communications Interface.  
Auto Changeover  
Control Sequences of  
Operation Common to Both  
VAV and CV Units  
When the System Mode is “Auto,” the  
mode will change to cooling or heating  
as necessary to satisfy the zone cooling  
and heating setpoints.The zone cooling  
and heating setpoints can be as close as  
2 F apart.  
The supply fan is energized  
approximately 1 second before the  
electric heat contactors. When the space  
temperature rises above the heating  
setpoint, the UCP deenergizes the supply  
fan and all electric heat contactors.  
Ventilation override (VOM)  
Ventilation override allows an external  
system to assume control of the unit for  
the purpose of exhaust or pressurization.  
There are two inputs associated with  
ventilation override, the initiate input and  
the select input. When the UCP senses a  
continuous closed condition on the  
initiate input at the low voltage terminal  
board the unit will begin ventilation  
override depending on the condition of  
the select input.The default condition of  
the select input is exhaust (input open).  
A closed select input will yield  
Unoccupied Zone Temperature Control  
Cooling and Heating  
Both cooling or heating modes can be  
selected to maintain Unoccupied zone  
temperature setpoints. For Unoccupied  
periods, heating or primary cooling  
operation can be selectively locked out at  
the remote panels orTRACER.  
Supply AirTempering  
This feature is available only with  
TRACER® or with systems using  
programmable zone sensors (CV only  
with economizer). For gas and electric  
heat units in the Heat mode but not  
actively heating, if the supply air  
temperature drops to 10 F below the  
occupied zone heating temperature  
setpoint, one stage of heat will be  
brought on to maintain a minimum  
supply air temperature.The heat stage is  
dropped if the supply air temperature  
ConventionalThermostat Interface  
An interface is required to use a  
conventional thermostat instead of a  
zone sensor module with the UCP.The  
ConventionalThermostat Interface (CTI)  
is connected between conventional  
thermostat and the UCP and will allow  
only two steps of heating or cooling.The  
pressurization.The component state  
matrix for ventilation override is  
as follows:  
System Com ponent Exhaust  
Pressurization  
Heat/Cool  
off  
closed  
off  
off  
open  
on  
IGV  
Supply Fan  
Exhaust Fan  
Outside Air Damper  
Return Air Damper  
VAV Boxes  
on  
off  
closed  
open  
n/a  
open  
closed  
open  
30  
RT-PRC007-EN  
Controls  
Coil Freeze Protection FROSTAT™  
Night setback (unoccupied mode) is  
operated through the time clock  
Timed override Activation—Non-lCS  
The FROSTAT system eliminates the  
need for hot gas bypass and adds a  
suction line surface temperature sensor  
to determine if the coil is in a condition  
of impending frost. If impending frost is  
detected primary cooling capacity is  
shed as necessary to prevent icing. All  
compressors are turned off after they  
have met their minimum 3 minute on  
times.The supply fan is forced on until  
the FROSTAT device no longer senses a  
frosting condition or for 60 seconds after  
the last compressor is shut off,  
When this function is initiated by the  
push of an override button on the  
programmable zone sensor, the unit will  
switch to the occupied mode. Automatic  
Cancellation of theTimed override Mode  
occurs after three hours of operation.  
provided in the sensors with night  
setback. When the time clock switches to  
night setback operation, the outdoor air  
dampers close and heating/cooling can  
be enabled or disabled. As the building  
load changes, the night setback sensor  
communicates the need for the rooftop  
heating/cooling (if enabled) function and  
the evaporator fan.The rooftop unit will  
cycle through the evening as heating/  
cooling (if enabled) is required in the  
space.When the time clock switches  
from night setback to occupied mode, all  
heating/cooling functions begin normal  
operation.  
Comparative Enthalpy Control of  
Economizer  
The Unitary Economizer Module (UEM)  
receives inputs from optional return air  
humidity and temperature sensors and  
determines whether or not it is feasible  
to economize. If the outdoor air enthalpy  
is greater than the return air enthalpy  
then it is not feasible to economize and  
the economizer damper will not open  
past its minimum position.  
whichever is longer.  
Occupied/Unoccupied Switching  
There are 3 ways to switch Occupied/  
Unoccupied:  
When using the night setback options  
with a VAV heating/cooling rooftop,  
airflow must be maintained through the  
rooftop unit.This can be accomplished  
by electrically tying the VAV boxes to the  
VAV heat relay contacts on the Low  
voltage terminal board or by using  
changeover thermostats. Either of these  
methods will assure adequate airflow  
through the unit and satisfactory  
1
Fan Failure Switch  
NSB Panel  
The fan failure switch will disable all unit  
functions and “flash” the Service LED on  
the zone sensor.  
2
Electronic time clock or field-supplied  
contact closure  
Emergency Stop Input  
A binary input is provided on the UCP for  
installation of field provided switch or  
contacts for immediate shutdown of all  
unit functions.The binary input is  
brought out to Low VoltageTerminal  
Board One (LTB1).  
3
temperature control of the building.  
TRACER  
Timed override Activation—ICS  
Night Setback Sensors  
When this function is initiated by  
Trane’s night setback sensors are  
programmable with a time clock function  
that provides communication to the  
rooftop unit through a 2-wire  
communications link.The desired  
transition times are programmed at  
the night setback sensor and  
pushing the override button on the ICS  
sensor,TRACER will switch the unit to  
the occupied mode. Unit operation  
(occupied mode) during timed override  
is terminated by a signal from TRACER.  
communicated to the unit.  
RT-PRC007-EN  
31  
Electrical  
Data  
DSS = 1.15 x (LOAD1 + LOAD2 + LOAD4)  
Select a fuse rating equal to the MOP  
value. If the MOP value does not equal a  
standard fuse size as listed in NEC 240-6,  
select the next lower standard fuse  
rating. NOTE: If selected MOP is less  
than the MCA, then reselect the lowest  
standard maximum fuse size which is  
equal to or larger than the MCA,  
Electrical Service Sizing  
To correctly size electrical service  
wiring for your unit, find the  
Select a disconnect switch size equal to  
or larger than the DSS value calculated.  
appropriate calculations listed below.  
Each type of unit has its own set of  
calculations for MCA (Minimum Circuit  
Ampacity), MOP (Maximum  
Overcurrent Protection), and RDE  
(Recommended Dual Element fuse  
size). Read the load definitions that  
follow and then find the appropriate  
set of calculations based on your unit  
type.  
Set 2. Rooftop units with Electric Heat  
To arrive at the correct MCA, MOP, and  
RDE values for these units, you must  
perform two sets of calculations. First  
calculate the MCA, MOP, and RDE values  
as if the unit was in cooling mode (use  
the equations given in Set 1).Then  
calculate the MCA, MOP, and RDE values  
as if the unit were in the heating mode as  
follows.  
provided the reselected fuse size does  
not exceed 800 amps.  
RDE = (1.5 x LOAD1) + LOAD2 + LOAD3 +  
LOAD4  
The selection RDE value will be the  
larger of the cooling mode RDE value or  
the heating mode RDE value calculated  
above.  
Set 1 is for cooling only and cooling  
with gas heat units, and set 2 is for  
cooling with electric heat units.  
(Keep in mind when determining LOADS  
that the compressors and condenser  
fans don’t run while the unit is in the  
heating mode).  
Select a fuse rating equal to the RDE  
value. If the RDE value does not equal a  
standard fuse size as listed in NEC 240-6,  
select the next higher standard fuse  
rating. NOTE: If the selected RDE is  
greater than the selected MOP value,  
then reselect the RDE value to equal the  
MOP value.  
Load Definitions: (To determine load  
values, see the Electrical Service Sizing  
DataTables.)  
For units using heaters less than 50 kw.  
MCA = 1.25 x (LOAD1 + LOAD2 + LOAD4)  
+ (1.25 x LOAD3)  
LOAD1 = CURRENT OFTHE LARGEST  
MOTOR (COMPRESSOR OR FAN  
MOTOR)  
For units using heaters equal to or  
greater than 50 kw.  
LOAD2 = SUM OFTHE CURRENTS OF  
ALL REMAINING MOTORS  
MCA = 1.25 x (LOAD1 + LOAD2 + LOAD4)  
+ LOAD3  
DSS = 1.15 x (LOAD1 + LOAD2 + LOAD3 +  
LOAD4)  
LOAD3 = CURRENT OF ELECTRIC  
HEATERS  
The nameplate MCA value will be the  
larger of the cooling mode MCA value or  
the heating mode MCA value calculated  
above.  
NOTE: Keep in mind when determining  
LOADS that the compressors and  
condenser fans don’t run while the unit  
is in the heating mode.  
LOAD4 = ANY OTHER LOAD RATED AT  
1 AMP OR MORE  
Set 1. Cooling Only Rooftop Units and  
Cooling with Gas Heat Rooftop Units  
MOP = (2.25 x LOAD1) + LOAD2 + LOAD3  
+ LOAD4  
The selection DSS value will be the  
larger of the cooling mode DSS or the  
heating mode DSS calculated above.  
MCA = (1.25 x LOAD1) + LOAD2 +  
LOAD4  
The selection MOP value will be the  
larger of the cooling mode MOP value or  
the heating mode MOP value calculated  
above.  
Select a disconnect switch size equal to  
or larger than the DSS value calculated.  
MOP = (2.25 x LOAD1) + LOAD2 +  
LOAD4  
Select a fuse rating equal to the MOP  
value. If the MOP value does not equal  
a standard fuse size as listed in NEC  
240-6, select the next lower standard  
fuse rating. NOTE: If selected MOP is  
less than the MCA, then reselect the  
lowest standard maximum fuse size  
which is equal to or larger than the  
MCA, provided the reselected fuse size  
does not exceed 800 amps.  
Table ED-1 —Ton Electrical Service Sizing Data — Electric Heat Module (Electric Heat Only)  
Models:TED/TEH 330 thru 600  
Electric Heat FLA  
Nominal  
Unit Size  
(Tons)  
Nominal  
Unit  
Voltage  
KW Heater  
36  
FLA  
74.9  
54  
FLA  
112.4  
72  
FLA  
—
90  
FLA  
—
108  
FLA  
—
27½  
30.0  
35.0  
208  
230  
460  
86.6  
43.3  
129.9  
65.0  
—
—
—
—
RDE = (1.5 x LOAD1) + LOAD2 + LOAD4  
86.6  
108.3  
Select a fuse rating equal to the RDE  
value. If the RDE value does not equal  
a standard fuse size as listed in NEC  
240-6, select the next higher standard  
fuse rating. NOTE: If the selected RDE  
is greater than the selected MOP value,  
then reselect the RDE value to equal  
the MOP value.  
575  
208  
—
—
52.0  
112.4  
69.3  
—
86.6  
—
—
—
40.0  
50.0  
230  
460  
575  
—
—
—
129.9  
65.0  
—
—
—
86.6  
69.3  
108.3  
86.6  
129.9  
103.9  
52.0  
Notes:  
1. All FLA in this table are based on heater operating at 208, 240, 480, and 600 volts.  
32  
RT-PRC007-EN  
Electrical  
Data  
Table ED-2 — 27½-50Ton Electrical Service Sizing Data1  
Fan Motors  
Condenser  
Compressor  
Supply  
Standard/  
Hi-Efficiency  
FLA  
Exhaust  
Allowable  
Voltage  
Characteristics Range  
Electrical  
RLA  
(Ea.)  
LRA  
(Ea.)  
269/409  
FLA  
FLA  
(Ea.)  
6.7  
Model  
No/Ton  
HP  
7.5  
10.0  
7.5  
10.0  
7.5  
10.0  
7.5  
10.0  
7.5  
10.0  
7.5  
10.0  
7.5  
10.0  
7.5  
10.0  
7.5  
10.0  
15.0  
7.5  
10.0  
15.0  
7.5  
10.0  
15.0  
7.5  
No.  
3
HP  
1.1  
(Ea.)  
7.0  
No.  
2
HP  
1.0  
TC/TE/YC*330  
208/60/3  
230/60/3  
460/60/3  
575/60/3  
208/60/3  
230/60/3  
460/60/3  
575/60/3  
208/60/3  
187-229  
207-253  
414-506  
517-633  
187-229  
207-253  
414-506  
517-633  
187-229  
1/10,1/15  
41.9/62.8  
22.3/21.5  
29.7/29.0  
19.6/18.8  
26.4/25.2  
9.8/9.4  
41.9/62.8  
18.1/27.3  
14.6/21.8  
62.8  
247/376  
95/142  
76/114  
409  
7.0  
3.5  
2.8  
7.0  
6.7  
2.9  
2.3  
6.7  
6.7  
2.9  
2.3  
6.7  
13.2/12.6  
7.8/7.5  
10.3/10.1  
22.3/21.5  
29.7/29.0  
19.6/18.8  
26.4/25.2  
9.8/9.4  
TC/TE/YC*360  
TC/TE/YC*420  
2/15  
2/15  
3
3
1.1  
1.1  
2
2
1.0  
1.0  
62.8  
376  
7.0  
27.3  
142  
3.5  
2.8  
7.0  
13.2/12.6  
7.8/7.5  
21.8  
114  
10.3/10.1  
22.3/21.5  
29.7/29.0  
44.4/41.5  
19.6/18.8  
26.4/25.2  
38.6/36.0  
9.8/9.4  
62.8  
409  
230/60/3  
460/60/3  
575/60/3  
207-253  
414-506  
517-633  
62.8  
27.3  
21.8  
376  
142  
114  
7.0  
3.5  
2.8  
6.7  
2.9  
2.3  
13.2/12.6  
19.3/18.0  
7.8/7.5  
10.0  
15.0  
10.0  
15.0  
10.0  
15.0  
10.0  
15.0  
10.0  
15.0  
10.0  
15.0  
20.0  
10.0  
15.0  
20.0  
10.0  
15.0  
20.0  
10.0  
15.0  
20.0  
10.3/10.1  
15.4/14.5  
29.7/29.0  
44.4/41.5  
26.4/25.2  
38.6/36.0  
13.2/12.6  
19.3/18.0  
10.3/10.1  
15.4/14.5  
29.7/29.0  
44.4/41.5  
58.7/56.1  
26.4/25.2  
38.6/36.0  
51.0/49.4  
13.2/12.6  
19.3/18.0  
25.5/24.7  
10.3/10.1  
15.4/14.5  
20.4/19.6  
TC/TE/YC*480  
TC/TE/YC*600  
208/60/3  
230/60/3  
460/60/3  
575/60/3  
208/60/3  
187-229  
207-253  
414-506  
517-633  
187-229  
2/15,1/10  
62.8/62.8/41.9 409/409/269  
62.8/62.8/41.9 376/376/247  
4
4
1.1  
1.1  
7.0  
7.0  
3.5  
2.8  
7.0  
2
2
1.0  
1.0  
6.7  
6.7  
2.9  
2.3  
6.7  
27.3/27.3/18.1  
21.8/21.8/14.6  
62.8  
142/142/95  
114/114/76  
409  
3/15  
230/60/3  
460/60/3  
575/60/3  
207-253  
414-506  
517-633  
62.8  
27.3  
21.8  
376  
142  
114  
7.0  
3.5  
2.8  
6.7  
2.9  
2.3  
Notes:  
1. All customer wiring and devices must be installed in accordance with local and national electrical codes.  
RT-PRC007-EN  
33  
Dim ensional  
Data  
Figure DD-1 — 27 1/2 - 35Tons (TC,TE,YC Low Heat)  
NOTES:  
1. ALL DIMENSIONS INCHES.  
2. THRU-BASE ELECTRICAL LOCATIONS  
ARE PRESENT ONLY WHEN OPTION  
IS ORDERED.  
1/16  
NOTE: The Two Horizontal Power  
Exhaust Hoods and the three  
Horizontal Fresh Air Hoods are  
located side by side. The Fresh  
Air Hoods (not shown) extend only  
23 15/16” from the end of the unit.  
34  
RT-PRC007-EN  
Dim ensional  
Data  
Figure DD-2 — 27 1/2 - 35Tons (YC High Heat)  
NOTES:  
1. ALL DIMENSIONS INCHES.  
2. THRU-BASE ELECTRICAL LOCATIONS  
ARE PRESENT ONLY WHEN OPTION  
IS ORDERED.  
1/16  
3”  
NOTE: The Two Horizontal Power  
Exhaust Hoods and the three  
Horizontal Fresh Air Hoods are  
located side by side. The Fresh  
Air Hoods (not shown) only extend  
23 15/16” from the end of the unit.  
RT-PRC007-EN  
35  
Dim ensional  
Data  
NOTES:  
Figure DD-3 — 40-50Tons (TC,TE,YC Low & High Heat)  
1. ALL DIMENSIONS INCHES.  
2. THRU-BASE ELECTRICAL LOCATIONS  
ARE PRESENT ONLY WHEN OPTION  
IS ORDERED.  
1/16  
4”  
NOTE: The Two Horizontal Power  
Exhaust Hoods and the three  
Horizontal Fresh Air Hoods are  
located side by side. The Fresh  
Air Hoods (not shown) only extend  
23 15/16” from the end of the unit.  
36  
RT-PRC007-EN  
Dim ensional  
Data  
(Variable Air  
Volum e VAV)  
Field Installed Sensors  
SINGLE SETPOINT SENSORWITH SYSTEM FUNCTION LIGHTS (BAYSENS021*)  
PROGRAMMABLE NIGHT-SETBACK SENSOR (BAYSENS020*)  
Note:  
1. Rem ote sensors are available for use with all zone sensors to provide rem ote sensing capabilities.  
RT-PRC007-EN  
37  
Dim ensional  
Data  
(Constant  
Volum e CV)  
Field Installed Sensors  
PROGRAMMABLE NIGHT-SETBACK SENSOR (BAYSENS019*)  
DUAL SETPOINT, MANUAL/AUTOMATIC  
CHANGEOVER SENSORWITH SYSTEM  
FUNCTION LIGHTS (BAYSENS010*)  
WITHOUT LED STATUS INDICATORS  
(BAYSENS008*)  
SINGLE SETPOINTWITHOUT  
LED STATUS INDICATORS (BAYSENS006*)  
Note:  
1. Rem ote sensors are available for use with all zone sensors to provide rem ote sensing capabilities.  
38  
RT-PRC007-EN  
Dim ensional  
Data  
(CV and VAV)  
Integrated Comfort™ System Sensors  
ZONETEMPERATURE SENSORW/TIMED OVERRIDE BUTTONS  
ZONETEMPERATURE SENSORW/TIMED OVERRIDE BUTTON  
AND LOCAL SETPOINT ADJUSTMENT (BAYSENS014)1  
(BAYSENS013*) ALSO AVAILABLE SENSOR ONLY (BAYSENS017*)  
REMOTE MINIMUM POSITION POTENTIOMETER CONTROL (BAYSTAT023*)  
TEMPERATURE SENSOR (BAYSENS016*)  
Note:  
1. Rem ote sensors are available for use with all zone sensors to provide rem ote sensing capabilities.  
RT-PRC007-EN  
39  
Weights  
Table W-1 —Approximate Operating Weights — Lbs.2  
Basic Unit Weights1  
Unit  
YC  
YC  
TC  
TE  
Model  
**D330  
**H330  
**D360  
**H360  
**D420  
**H420  
**D480  
**H480  
**D600  
**H600  
Low Heat  
3650  
3650  
3730  
3730  
3815  
3815  
4765  
4790  
High Heat  
4012  
3520  
3565  
3600  
3600  
3685  
3685  
4540  
4540  
4710  
4710  
3553  
3598  
3633  
3633  
3718  
3718  
4575  
4575  
4745  
4745  
4077  
4092  
4142  
4177  
4227  
4885  
4915  
5055  
4935  
4960  
5085  
Notes:  
1. Basic unit weight includes m inim um HP Supply Fan m otor.  
2. Optional high static and high efficiency m otor weights are in addition to the standard  
m otor weight included in the basic unit weight.  
Table W-2 — Point Loading Average Weight1  
A
B
C
D
E
F
1196  
1209  
1238  
1242  
1265  
1269  
1527  
1532  
1598  
1602  
Note:  
1159  
1171  
1199  
1203  
1226  
1230  
1480  
1485  
1549  
1553  
673  
680  
696  
699  
712  
714  
859  
862  
899  
902  
710  
718  
735  
737  
751  
754  
907  
910  
949  
951  
673  
680  
696  
699  
712  
714  
859  
862  
899  
902  
710  
718  
735  
737  
751  
754  
907  
910  
949  
951  
D
C
E
B
F
TOP VIEW  
OF UNIT  
COMPRS  
A
1. Point Loading is identified with corner A being the corner with the  
com pressors. As you m ove clockwise around the unit as viewed  
from the top, m id-point B, corner C, corner D, m id-point E and  
corner F.  
Table W-3 — Component Weights  
Weights of Optional Components  
Variable  
Hi-Static/  
Hi-Eff  
Factory  
GFI with  
Roof  
Curb  
0-25%  
Inlet  
Frequency  
Thru-the Non-Fused  
Unit Barometric Power Supply Fan Manual  
Guide  
Drives (VFD's)  
Service Base Disconnect Disconnect  
Weights  
Model  
**D330  
**H330  
**D360  
**H360  
**D420  
**H420  
**D480  
**H480  
**D600  
**H600  
Relief  
110  
145  
110  
145  
110  
145  
110  
145  
110  
145  
Exhaust Motors (2) Damper Econo Vanes W/O Bypass With Bypass Valves Electric  
Switch  
30  
30  
30  
30  
30  
30  
30  
30  
Switch  
85  
85  
85  
85  
85  
85  
85  
85  
Lo  
Hi  
330  
330  
330  
330  
330  
330  
165  
200  
165  
200  
165  
200  
165  
200  
165  
200  
120  
120  
120  
120  
120  
120  
125  
125  
125  
125  
50  
50  
50  
50  
50  
50  
50  
50  
50  
50  
260  
285  
260  
285  
260  
285  
290  
300  
290  
300  
55  
55  
55  
55  
55  
55  
70  
70  
70  
70  
85  
85  
85  
115  
115  
115  
115  
150  
150  
150  
150  
150  
150  
11  
11  
11  
11  
11  
11  
18  
18  
18  
18  
6
6
6
6
6
6
6
6
6
6
310  
310  
310  
310  
310  
310  
85  
115  
115  
115  
115  
115  
115  
365  
365  
365  
365  
30  
30  
85  
85  
Table W-4 — Minimum Operating Clearances for Unit Installation  
2
Condenser Coil  
End / Side  
8 Feet / 4 Feet  
16 Feet / 8 Feet  
Service Side  
Access  
4 Feet  
Econo/Exhaust End  
6 Feet  
Single Unit1  
Multiple Unit1,3  
12 Feet  
8 Feet  
Notes:  
1. Horizontal and Downflow Units, all sizes.  
2. Condenser coil is located at the end and side of the unit.  
3. Clearances on multiple unit installations are distances between units.  
40  
RT-PRC007-EN  
Mechanical  
Specifications  
General  
chamber which leads to increased  
Electric Heaters  
efficiency. Exhaustive testing on the 3-D  
Scroll, including start up with the shell  
full of liquid, has proven that slugging  
does not fail involutes. Direct-drive, 3600  
rpm, suction gas-cooled hermetic motor.  
Trane 3-D Scroll compressor includes  
centrifugal oil pump, oil level sightglass  
and oil charging valve. Each compressor  
shall have crankcase heaters installed,  
properly sized to minimize the amount of  
liquid refrigerant present in the oil sump  
during off cycles.  
The units shall be dedicated downflow  
or horizontal airflow.The operating range  
shall be between 115 F and 0 F in cooling  
as standard from the factory for all units.  
Cooling performance shall be rated in  
accordance with ARI testing procedures.  
All units shall be factory assembled,  
internally wired, fully charged with  
HCFC-22 and 100% run tested to check  
cooling operation, fan and blower  
rotation and control sequence before  
leaving the factory.Wiring internal to the  
unit shall be numbered for simplified  
identification. Units shall be UL listed  
and labeled, classified in accordance to  
UL 1995/CAN/CSA No. 236-M90 for  
Central Cooling Air Conditioners.  
Electric heat shall be available for factory  
installation within basic unit. Electric  
heater elements shall be constructed of  
heavy-duty nickel chromium elements  
internally delta connected for 240 volt,  
wye connected for 480 and 600 volt.  
Staging shall be achieved through the  
unitary control processor (UCP). Each  
heater package shall have automatically  
reset high limit control operating  
through heating element contactors. All  
heaters shall be individually fused from  
factory, where required, and meet all  
NEC and CEC requirements. Power  
assemblies shall provide single-point  
connection. Electric heat shall be UL  
listed or CSA certified.  
Refrigerant Circuits  
Each refrigerant circuit shall have  
independent thermostatic expansion  
devices, service pressure ports and  
refrigerant line filter driers factory-  
installed as standard. An area shall be  
provided for replacement suction line  
driers.  
Canadian units shall be CSA Certified.  
Gas Heating Section  
Casing  
The heating section shall have a drum  
and tube heat exchanger(s) design using  
corrosion resistant steel components. A  
forced combustion blower shall supply  
premixed fuel to a single burner ignited  
by a pilotless hot surface ignition  
system. In order to provide reliable  
operation, a negative pressure gas valve  
shall be used that requires blower  
operation to initiate gas flow. On an  
initial call for heat, the combustion  
blower shall purge the heat exchanger(s)  
45 seconds before ignition. After three  
unsuccessful ignition attempts, the entire  
heating system shall be locked out until  
manually reset at the thermostat. Units  
shall be suitable for use with natural gas  
or propane (field installed kit) and also  
comply with California requirements for  
low NOx emissions. All units shall have  
two stage heating.  
Unit casing shall be constructed of zinc  
coated, heavy gauge, galvanized steel.  
All components shall be mounted in a  
weather resistant steel cabinet with a  
painted exterior.Where top cover seams  
exist, they shall be double hemmed and  
gasket sealed to prevent water leakage.  
Cabinet construction shall allow for all  
maintenance on one side of the unit.  
Service panels shall have handles and  
shall be removable while providing a  
water and air tight seal. Control box  
access shall be hinged.The indoor air  
section shall be completely insulated  
with fire resistant, permanent, odorless  
glass fiber material.The base of the unit  
shall have provisions for crane lifting.  
Evaporator and Condenser Coils  
3
Condenser coils shall have /8” copper  
tubes mechanically bonded to lanced  
aluminum plate fins. Evaporator coils  
1
shall be /2” internally finned copper  
tubes mechanically bonded to high  
performance aluminum plate fins. All  
coils shall be leak tested at the factory to  
ensure pressure integrity. All coils shall  
be leak tested to 200 psig and pressure  
tested to 450 psig. All dual circuit  
evaporator coils shall be of intermingled  
configuration. Sloped condensate drain  
pans are standard.  
Outdoor Fans  
The outdoor fan shall be direct-drive,  
statically and dynamically balanced,  
draw through in the vertical discharge  
position.The fan motor(s) shall be  
permanently lubricated and have built-in  
thermal overload protection.  
Filters  
Two inch, throwaway filters shall be  
standard on all size units.Two inch “high  
efficiency”, and four inch “high  
Controls  
efficiency” filters shall be optional.  
Unit shall be completely factory wired  
with necessary controls and terminal  
block for power wiring. Units shall  
provide an external location for  
mounting fused disconnect device.  
Microprocessor controls shall be  
provided for all 24 volt control functions.  
The resident control algorithms shall  
Compressors  
Indoor Fan  
Trane 3-D® Scroll compressors have a  
simple mechanical design with only  
three major moving parts. Scroll type  
compression provides inherently low  
vibration.The 3-D Scroll provides a  
completely enclosed compression  
Units shall have belt driven, FC,  
centrifugal fans with fixed motor  
sheaves. All motors shall be circuit  
breaker protected. All indoor fan motors  
meet the U.S. Energy Policy Act of 1992  
(EPACT).  
RT-PRC007-EN  
41  
Mechanical  
Specifications  
make all heating, cooling and/or  
ventilating decisions in response to  
electronic signals from sensors  
sequences shall be selectable based  
open a binary select input.  
GFI Convenience Outlet (Factory  
Powered)  
Outside Air  
A 15A, 115V Ground Fault Interrupter  
convenience outlet shall be factory  
installed. It shall be wired and powered  
from a factory mounted transformer.  
Unit mounted non-fused disconnect with  
external handle shall be furnished with  
factory powered outlet.  
measuring indoor and outdoor  
Manual Outside Air  
temperatures.The control algorithm  
maintains accurate temperature control,  
minimizes drift from set point and  
provides better building comfort. A  
centralized microprocessor shall provide  
anti-short cycle timing and time delay  
between compressors to provide a  
higher level of machine protection.  
A manually controllable outside air  
damper shall be adjustable for up to 25  
percent outside air. Manual damper is  
set at desired position at unit start up.  
Economizer  
GFI Convenience Outlet (Field Powered)  
Economizer shall be factory installed.The  
assembly includes: fully modulating 0-  
100 percent motor and dampers,  
minimum position setting, preset  
linkage, wiring harness, and fixed dry  
bulb control. Solid state enthalpy and  
differential enthalpy control shall be a  
factory or field installed option.  
A 15A, 115V Ground Fault Interrupter  
convenience outlet shall be factory  
installed and shall be powered by  
customer provided 115V circuit.  
Control Options  
Inlet Guide Vanes shall be installed on  
each fan inlet to regulate capacity and  
limit horsepower at lower system  
requirements.When in any position  
other than full open they shall pre-spin  
intake air in the same direction as fan  
rotation.The inlet guide vanes shall close  
when supply fan is off, except in night  
setback.  
Hinged Service Access  
Filter access panel and supply fan access  
panel shall be hinged for ease of unit  
service.  
Exhaust Air  
Condenser Coil Guards  
Barometric Relief  
Factory installed condenser vinyl coated  
wire mesh coil guards shall be available  
to provide full area protection against  
debris and vandalism.  
The barometric relief damper shall be  
optional with the economizer. Option  
shall provide a pressure operated  
damper for the purpose of space  
pressure equalization and be gravity  
closing to prohibit entrance of outside air  
during the equipment “off” cycle.  
The inlet guide vane actuator motor shall  
be driven by a modulating dc signal  
from the unit microprocessor. A pressure  
transducer shall measure duct static  
pressure and modulate the inlet guide  
vanes to maintain the required supply air  
static pressure within a predetermined  
range.  
LonTalk Communication Interface  
Available either field or factory-installed  
for constant volume units. When  
Power Exhaust Fan  
installed on a constant volume unit, this  
LonTalk board will allow the unit to  
communicate as aTrane Comm5 device  
or directly with generic LonTalk Network  
Building Automation System Controls.  
Power exhaust shall be available on all  
units and shall be factory installed. It  
shall assist the barometric relief damper  
in maintaining building pressurization.  
Variable Frequency Drives (VFDs)  
VFDs shall be factory installed and tested  
to provide supply fan motor speed  
modulation.The VFD shall receive a 2-  
10 VDC signal from the unit  
microprocessor based upon supply  
static pressure and shall cause the drive  
to accelerate or decelerate as required to  
maintain the supply static pressure  
setpoint. When subjected to high  
ambient return conditions the VFD shall  
reduce its output frequency to maintain  
operation. Bypass control to provide full  
nominal air flow in the event of drive  
failure shall be optional.  
Stainless Steel Drain Pans  
Unit Options  
Service Valves  
Sloped stainless steel evaporator coil  
drain pans are durable, long-lasting and  
highly corrosion resistant.  
Service valves shall be provided factory  
installed and include suction, liquid, and  
discharge 3-way shutoff valves.  
Black Epoxy Coated Condenser Coil  
The coil provides corrosion protection to  
condenser coils for seacoast application.  
The protection is a factory applied  
thermoset vinyl coating, bonded to  
normal aluminum fin stock.The uniform  
thickness of the bonded vinyl layer  
exhibits excellent corrosion protection in  
salt spray tests performed in accordance  
with ASTM B117.  
Through-The-Base Electrical Provision  
An electrical service entrance shall be  
provided which allows access to route all  
high and low voltage electrical wiring  
inside the curb, through the bottom of  
the outdoor section of the unit and into  
the control box area.  
Ventilation Override  
Ventilation Override shall allow a binary  
input from the fire/life safety panel to  
cause the unit to override standard  
operation and assume one of two  
factory preset ventilation sequences,  
exhaust or pressurization.The two  
Non-Fused Disconnect Switch  
A factory installed non-fused disconnect  
switch with external handle shall be  
provided and shall satisfy NEC  
requirements for a service disconnect.  
The non-fused disconnect shall be  
mounted inside the unit control box.  
42  
RT-PRC007-EN  
Mechanical  
Specifications  
• Outside air temperature  
• Outside relative humidity  
• Sensor Failure  
Humidity sensor  
OAT sensor  
SAT sensor  
RAT sensor  
Zone temperature sensor  
Mode input  
Zone Sensors  
Accessories  
Roof Curb  
Shall be provided to interface with the  
Micro unit controls and shall be available  
in either manual, automatic  
programmable with night setback, with  
system malfunction lights or remote  
sensor options.  
The roof curb shall be designed to mate  
with the unit and provide support and a  
water tight installation when installed  
properly.The roof curb design shall allow  
field-fabricated rectangular supply/return  
ductwork to be connected directly to the  
curb when used with downflow units.  
Curb design shall comply with NRCA  
requirements. Curb shall ship knocked  
down for field assembly and include  
wood nailer strips.  
ConventionalThermostat Interface (CTI)  
Cooling/heating setpoints from  
sensors  
This field installed circuit board shall  
provide interface with electromechanical  
thermostats or automation systems. Not  
available with VAV system control.  
Static pressure transducer  
Unit mounted potentiometer  
SAT from potentiometer  
Air reset setpoint from potentiometer  
• Unit Configuration data  
Gas or electric heat  
Economizer present  
• High temp input status  
• Local setpoint  
Differential Pressure Switches  
Trane Communication Interface (TCI)  
This field installed option allows dirty  
filter indication. The dirty filter switch will  
light the Service LED on the zone sensor  
and will allow continued unit operation.  
Shall be provided to interface with the  
Trane Integrated Comfort™ System and  
shall be available factory installed.The  
TCI shall allow control and monitoring of  
the rooftop unit via a two-wire  
Remote Potentiometer  
• Local mode setting  
• Inlet Guide Vane position  
communication link.  
A remote potentiometer shall be  
available to remotely adjust the unit  
economizer minimum position.  
The following alarm and diagnostic  
information shall be available:  
Tracer Originated Data  
• Command operating mode  
• Host controllable functions:  
Supply fan  
High Temperature Thermostats  
UCP Originated Data  
• Unit operating mode  
• Unit failure status  
Cooling failure  
Heating failure  
Emergency service stop indication  
Supply fan proving  
Timed override activation  
High temperature thermostat status  
• Zone temperature  
• Supply air temperature  
• Cooling status (all stages)  
• Stage activated or not  
• Stage locked out by UCP  
• HPC status for that stage  
• Compressor disable inputs  
• Heating status  
• Number of stages activated  
• High temperature limit status  
• Economizer status  
• Enthalpy favorability status  
• Requested minimum position  
• Damper position  
Field installed, manually resettable high  
temperature thermostats shall provide  
input to the unit controls to shut down  
the system if the temperature sensed at  
the return is 135 F or at the discharge  
240 F.  
Economizer  
Cooling stages enabled  
Heating stages enabled  
Emergency shutdown  
• Minimum damper position  
• Heating setpoint  
Reference Enthalpy Kit  
• Cooling setpoint  
• Supply air tempering enable/disable  
• Slave mode (CV only)  
• Tracer/Local operation  
• SAT setpoint  
• Reset setpoint  
• Reset amount  
Field installed enthalpy kit shall provide  
inputs for economizer control based  
upon comparison of the outside air  
stream to a definable enthalpy reference  
point. May also be factory installed.  
Comparative Enthalpy Kit  
• MWU setpoint  
Field installed enthalpy kit shall provide  
inputs for economizer control based  
upon comparison of the enthalpies of  
the return and outdoor air streams. Also  
available factory installed.  
• MWU enable/disable  
• SAT Reset type select  
• Static pressure setpoint  
• Static pressure deadband  
• Daytime warm-up enable/disable  
• Power exhaust setpoint  
• Dry bulb/enthalpy input status  
RT-PRC007-EN  
43  
Mechanical  
Specifications  
LP Conversion Kit  
BAYSENS017* — Remote Sensor can be  
used for remote zone temperature  
sensing capabilities when zone sensors  
are used as remote panels or as a  
morning warm-up sensor for use with  
VAV units or as a zone sensor withTracer  
Integrated Comfort system.  
Field installed conversion kit shall  
provide orifice(s) for simplified  
conversion to liquefied propane gas. No  
change of gas valve shall be required.  
BAYSENS006* — Zone Sensor has one  
temperature setpoint lever, heat, off or  
cool system switch, fan auto or fan on  
switch. Manual changeover.These  
sensors are for CV units only.  
BAYSENS019* & BAYSENS020* —  
Electronic programmable sensors with  
auto or manual changeover with seven  
day programming. Keyboard selection of  
heat, cool, auto fan or on. All  
programmable sensors have System on,  
Heat, Cool, Service LED/LCD indicators  
as standard. Night setback sensors have  
two occupied, and two unoccupied  
programs per day. Sensors are available  
for CV zone temperature control and VAV  
zone temperature control.  
BAYSENS008* — Zone Sensor has two  
temperature setpoint levers, heat, auto,  
off, or cool system switch, fan auto or fan  
on switch. Auto changeover.These  
sensors are used with CV units.  
BAYSENS010* — Zone Sensor has two  
temperature set point levers, heat, auto,  
off, or cool system switch, fan auto or fan  
on switch. Status indication LED lights,  
System on, Heat, Cool, and Service are  
provided.These sensors are used with  
CV units.  
BAYSENS021* — Zone Sensor with  
supply air single temperature setpoint  
and AUTO/OFF system switch. Status  
indication LED lights, System ON, Heat,  
Cool, and Service are provided. Sensors  
are available to be used with VAV units.  
BAYSENS013* — Zone temperature  
sensor with timed override buttons used  
with Tracer® Integrated Comfort system.  
BAYSTAT023* — Remote Minimum  
Position Potentiometer is used to  
remotely specify the minimum  
economizer position.  
BAYSENS014* — Zone temperature  
sensor with local temperature  
adjustment control and timed override  
buttons used withTracer Integrated  
Comfort system. May also be used for  
Morning Warm-up setpoint and sensor.  
BAYSENS016* —Temperature Sensor is  
a bullet or pencil type sensor that could  
be used for temperature input such as  
return air duct temperature.  
44  
RT-PRC007-EN  
Literature Order Number  
File Number  
RT-PRC007-EN  
PL-RT-TC/TE/YC-27½ - 50-TONS-PRC0007-EN-10-2001  
RT-PRC007-EN 02/01  
Supersedes  
The Trane Com pany  
An Am erican Standard Com pany  
w w w .trane.com  
Stocking Location  
Inland-LaCrosse  
For more information contact your  
local district office, or e-mail us at  
comfo[email protected]  
Since The Trane Company has a policy of continuous product and product data improvement, it reserves the  
right to change design and specifications without notice.  

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