Trane Scrh User Manual

Installation, Operation, and  
Maintenance  
Midrange Self-Contained Units  
Models SCWH/SCRH  
3, 5, 7.5, 10, 12, & 15-tons  
“AO” and later design sequence  
PKG-SVX14A-EN  
October 2008  
contents  
Cross reference to related publications/information:  
Midrange Self-Contained catalog, PKG-PRC012-EN  
Installation…………………………………………………2  
general information ……………………………………………2  
pre-installation considerations ………………………………6  
dimensions & weights ………………………………………11  
mechanical requirements ……………………………………17  
electrical requirements ………………………………………19  
installation procedure ………………………………………21  
pre-startup requirements ……………………………………22  
startup …………………………………………………………23  
Operation…………………………………………………24  
sequence of operation ………………………………………24  
Maintenance ……………………………………………25  
general information …………………………………………25  
maintenance procedures ……………………………………26  
periodic checklists ……………………………………………29  
troubleshooting ………………………………………………30  
typical wiring diagrams ……………………………………32  
PKG-SVX14A-EN  
3
general  
information  
Installation  
Midrange Model Number Description  
Following is a complete description of the midrange model number. Each digit in the model number has a corresponding code that  
identifies specific unit options.  
S C W H 075 4  
567 8  
2
9
A0  
1
0
1
0
1
2
3
4
1011 12 13 14 15  
Digit 14 - unit finish  
1 = painted  
Digit 8 - unit voltage  
Digit 1 - unit model  
3 = 208 - 230 volt/60 hz/3 ph  
4 = 460 volt/60 hz/3 ph  
5 = 575 volt/60 hz/3 ph  
2 = corrosion resistant coating  
S = self contained  
Digit 15 - coil finish/Cu-Ni Condenser  
0 = none  
E = evaporator coated (SCRH)  
J = Cupronickel condenser &  
Evaporator coated (SCWH)  
Digit 2 - unit type  
C = commercial  
Digit 9 - air flow configuration  
2 = vertical discharge / front return  
3 = vertical discharge / rear return  
Digit 3 - condenser medium  
R = remote air-cooled  
W = water cooled  
Digit 10, 11 - design sequence  
A0 = design sequence  
Digit 4 - development sequence  
H = development series  
Digit 12 - air filter type  
1 = one-inch fiberglass throwaway  
Digit 5, 6, 7- unit nominal capacity  
030 = 3 tons  
Digit 13 - control  
0 = control interface  
050 = 5 tons  
075 = 7.5 tons  
100 = 10 tons  
120 = 12 tons  
150 = 15 tons  
Unit Airflow Configurations  
unit size  
discharge  
fanlocation  
comments  
030/050/075  
vertical CCW  
horizontalCW  
top  
top  
standard  
fieldconverted  
100/120/150  
vertical CCW  
top  
standard  
vertical CW  
horizontalCW  
vertical CW  
horizontalCW  
horizontalCCW  
top  
top  
rear  
rear  
rear  
fieldconverted  
4
PKG-SVX14A-EN  
general  
information  
Installation  
General  
The midrange models SCWH/SCRH  
is a high efficiency, vertical air  
condioner. units have either front or top  
discharge configuration options and easy  
service access. Unit construction is heavy  
gage steel with a baked enamel finish.  
Available unit voltages are 208/3/60, 230/  
3/60, 460/3/60, and 575/3/60.  
refrigerants as a trace gas. Perform  
evacuation prior to charging with a  
vacuum pump capable of pulling a  
vacuum of 1,000 microns of mercury or  
less. Let the unit stand for 12 hours and  
with the vacuum not rising above 2,500  
microns of mercury.  
Refrigerant Handling  
Procedures  
Environmental Accountability Policy  
Trane urges that all HVAC servicers to  
make every effort to eliminate, if possible,  
or vigorously reduce the emission of CFC,  
HCFC, and HFC refrigerants to the  
atmosphere. Always act in a responsible  
manner to conserve refrigerants for  
continued usage even when acceptable  
alternatives are available.  
A rise above 2,500 microns of mercury  
indicates a leak test is required to locate  
and repair any leaks. A leak test is  
required on any repaired area.  
Refrigeration Circuits  
Units are configured in single or double  
refrigeration circuits. Each circuit consists  
of:  
Charge refrigerant into the equipment  
only after equipment does not leak or  
contain moisture. Reference proper  
refrigerant charge requirements in the  
maintenance section of this manual to  
ensure efficient machine operation.  
When charging is complete, purge or  
drain charging lines into an approved  
refrigerant container. Seal all used  
refrigerant containers with approved  
closure devices to prevent unused  
refrigerant from escaping to the atmo-  
sphere. Take extra care to properly  
maintain all service equipment directly  
supporting refrigerant service work such  
as gauges, hoses, vacuum pumps, and  
recycling equipment .  
Recover and Recycle Refrigerants  
Never release refrigerant to the  
atmosphere! Always recover and/or  
recycle refrigerant for reuse,  
reprocessing (reclaimed), or properly  
dispose if removing from equipment.  
Always determine the recycle or reclaim  
requirements of the refrigerant before  
beginning the recovery procedure.  
Obtain a chemical analysis of the  
refrigerant if necessary. Questions about  
recovered refrigerant and acceptable  
refrigerant quality standards are  
addressed in ARI Standard 700.  
• high efficiency scroll compressor  
mounted on rubber isolation grommets  
• evaporator coils designed for optimum  
performance and efficiency with lanced  
fins and rifled tubing  
• filter-drier  
Evaporator Section  
The evaporator fan section consists of  
one or two forward curved centrifugal  
fans powered by a premium efficiency  
motor through an adjustable motor  
sheave and fixed diameter blower pulley.  
Controls  
Refrigerant Handling and Safety  
Consult the manufacturer’s material  
safety data sheet (MSDS) for information  
on refrigerant handling to fully  
understand health, safety, storage,  
handling, and disposal requirements. Use  
the approved containment vessels and  
refer to appropriate safety standards.  
Comply with all applicable transportation  
standards when shipping refrigerant  
containers.  
The standard control panel consists of a  
high voltage terminal block, overload  
relays for each fan motor, transformer, 3-  
pole 24-volt contactors for eachmotor  
and compressor, and a 5-second delay  
timer. Remote thermostat controls are  
field installed.  
When cleaning system components or  
parts, avoid using CFC-11 (R-11) or CFC-  
113 (R-113). Use only cleaning-solvents  
that do not have ozone depletion factors.  
Properly dispose of used materials.  
Refrigeration system cleanup methods  
using filters and driers are preferred.  
Check for leaks when excessive purge  
operation is observed.  
Field-Installed Accesories  
These items ship separately for field  
installation:  
• steam coil  
Service Equipment and Procedures  
To minimize refrigerant emissions while  
recovering refrigerant, use the  
manufacturer’s recommended recycling  
equipment per the MSDS. Use  
equipment and methods which will pull  
the lowest possible system vacuum while  
recovering and condensing refrigerant.  
Equipment capable of pulling a vacuum of  
less than 1,000 microns of mercury is  
recommended.  
Keep abreast of unit enhancements,  
conversion refrigerants, compatible  
parts, and manufacturer’s recommenda-  
tions that will reduce refrigerant emis-  
sions and increase equipment operating  
efficiencies.  
• hot water coil  
• plenum  
• oversized motors  
• remote thermostat  
Note: Application of the above options  
and/or accessories may require field  
adjustment of fan speeds to ensure  
proper airflow and performance.  
Unit Nameplate  
Do not open the unit to the atmosphere  
for service work until refrigerant is fully  
removed/recovered. When leak-testing  
with trace refrigerant and nitrogen, use  
HCFC-22 (R-22) rather than CFC-12 (R-  
12) or any other fully-halogenated  
The unit nameplate identifies the unit  
model number, appropriate service  
literature, and wiring diagrm numbers. It  
is mounted on the control panel door.  
Reference this information when making  
inquires or ordering parts or literature.  
refrigerant . Be aware of any new leak  
test methods which may eliminate  
PKG-SVX14A-EN  
5
pre-installation  
considerations  
Installation  
Receiving Checklist  
Service Access  
Pre-Installation Considerations  
Complete the following checklist  
immediately after receiving unit  
shipment to detect possible shipping  
damage.  
Maintain adequate clearances around  
and above the unit to ensure proper unit  
operationa nd allow sufficient service  
accesss. Trane recommends 36-inches  
service access on all sides fo the unit.  
Service access locations are shown in  
figures on pages 8 through 9.  
Pre-Installation Checklist  
Complete the following checklist before  
beginning unit installation.  
Verify the unit size and tagging with the  
unit nameplate.  
Make certain the floor or foundation is  
level, solid, and sufficient to support the  
unit and accessory weights. Level or  
repair the floor before positioning the  
unit if neccesary.  
Allow minimum recommended  
clearances for routine maintenance and  
service. Refer to unit submittals for  
dimensions.  
Allow three fan diameters above the  
unit for the discharge ductwork. Return  
air enters the rear of the unit and  
conditioned supply air discharges  
through the top.  
Electrical connection knockouts are on  
the top, left side of the unit.  
Allow adequate space for piping  
access and panel removal. Condenser  
water piping, refrigerant piping, and  
condensate drain connections are on  
the lower left end panel.  
Inspect individual cartons before  
accepting. Check for rattles, bent carton  
corners, or other visible indications of  
shipping damage.  
If a unit appears damaged, inspect it  
immediately before accepting the  
shipment. Make specific notations  
concerning the damage on the freight  
bill. Do not refuse delivery.  
Inspect the unit for concealed damage  
before it is stored and as soon as  
possible after delivery. Report  
concealed damage to the freight line  
within the allotted time after delivery.  
Check with the carrier for their allotted  
time to submit a claim.  
Do not move damaged material from  
the receiving location. It is the receiver’s  
responsibility to provide reasonable  
evidence that concealed damage did  
not occur after delivery.  
Do not continue unpacking the  
shipment if it appears damaged. Retain  
all internal packing, cartons, and crate.  
Take photos of damaged material if  
possible.  
Notify the carrier’s terminal of the  
damage immediately by phone and  
mail. Request an immediate joint  
inspection of the damage by the carrier  
and consignee.  
Notify your Trane representative of  
the damage and arrange for repair.  
Have the carrier inspect the damage  
before making any repairs to the unit.  
WARNING  
Hazardous Voltage!  
Disconnect all electric power, including  
remote disconnects before servicing.  
Follow proper lockout/tagout  
procedures to ensure power cannot  
be inadvertently energized. Failure to  
disconnect power before servicing  
could result in death or serious injury.  
Installation Preparation  
Before installing the unit, perform the  
following procedures to ensure proper  
unit operation.  
1. Verify the floor or foundation is level.  
Shim or repair as necessary. To ensure  
proper unit operation, install the unit  
level in both horizontal axes.  
2. Allow adequate service and code  
clearances as recommended in  
“Service Access” section. Position the  
unit and skid assembly in its final  
location. Test lift the unit to determine  
exact unit balance and stability before  
hoisting it to the installation location.  
See the “Proper Lifting Procedure”  
section for proper rigging procedures  
and cautions.  
3. Remove the skids from under the unit.  
If you find internal damage, file a claim  
immediately to the delivering carrier.  
4. Remove the protective shipping covers  
from the unit.  
5. Verify the compressor isolator shipping  
brackets are removed and the isolators  
are properly tightened for operation.  
Electrical supply power must meet  
specific balance and voltage  
requirements as described in the  
“Electrical Requirements” section.  
Water-cooled units only: The installer  
is responsible for providing a condenser  
main, standby water pump, cooling  
tower, pressure gauges, strainers, and  
all components for waterside piping.  
See the “Water Piping” section for  
general waterside recommendations.  
Air-cooled units only: The installer is  
responsible for providing and installing  
the remote air-cooled condenser and  
refrigerant piping, including filter driers.  
Unit Storage  
Take precautions to prevent condensate  
from forming inside the electrical  
compartments and motors if the unit is  
stored before it is installed.  
Receiving and Handling  
Shipping Package  
Midrange units ship assembled on skids.  
Units ship assembled, piped, and charged  
with either R410a (model SCWH)  
or a dry nitrogen charge (model SCRH).  
6
PKG-SVX14A-EN  
pre-installation  
considerations  
Installation  
Service Access  
3 through 7.5-ton SCRH/SCWH  
LATCH  
THIS PANEL GOES TO TOP ON  
HORIZONTAL AIR DISCHARGE  
CONFIGURATION  
HEATER  
ACCESS  
PROVIDED DISASSEMBLED  
(FOR FIELD-INSTALLED REAR RETURN)  
10 through 15-ton SCWH/SRCH with top-mounted fan configuration  
FAN ACCESS  
24"  
24"  
COIL / ELECTRIC HEATER  
ACCESS  
FRONT RETURN  
MOTOR / DRIVE ACCESS  
(RIGHT SIDE)  
CONTROL BOX &  
CONDENSER FAN ACCESS  
TXV ACCESS  
(RIGHT SIDE)  
AIR FILTER ACCESS  
(BOTH SIDES)  
UNIT-MOUNTED T-STAT  
OPENING (BOTH SIDES)  
26" SERVICE CLEARANCE  
RIGHT SIDE  
26" SERVICE CLEARANCE  
RIGHT SIDE  
DRAIN CONNECTION  
(BOTH SIDES)  
POWER ENTRY  
(BOTH SIDES)  
CONTROL ENTRY  
(BOTH SIDES)  
18" SERVICE CLEARANCE  
REAR  
42" SERVICE CLEARANCE FRONT  
REAR RETURN  
26" SERVICE CLEARANCE  
LEFT SIDE  
26" SERVICE CLEARANCE  
LEFT SIDE  
COMPRESSOR ACCESS  
SIGHT GLASS/FILTER DRIER ACCESS  
(RIGHT SIDE)  
PKG-SVX14A-EN  
7
pre-installation  
considerations  
Installation  
Service Access  
10 through 15-ton SCRH/SCWH  
10, 12, & 15-ton SCWH/SRCH  
with side-mounted fan configura-  
tion, field converted  
8
PKG-SVX14A-EN  
pre-installation  
considerations  
Installation  
Isolator Placement  
Table I-PC-1. Isolator load points, units with a vertical discharge configuration, lbs.  
model  
L1  
L2  
L3  
L4  
L1  
L2  
L3  
L4  
Note: Isolators are field-provided.  
SCRB/SIRB  
SCWB/SIWB  
3-ton  
5-ton  
7.5-ton  
10-ton  
15-ton  
99  
105  
120  
157  
227  
273  
359  
127  
166  
221  
253  
356  
105  
129  
177  
263  
315  
133  
165  
234  
334  
388  
118  
166  
230  
293  
382  
124  
165  
231  
300  
375  
115  
154  
208  
243  
122  
203  
266  
332  
Table I-PC-2. Isolator load points, units with a horizontal discharge configuration, lbs.  
model  
L1  
L2  
L3  
L4  
L1  
L2  
L3  
L4  
SCRB/SIRB  
SCWB/SIWB  
7.5-ton  
10-ton  
15-ton  
250  
318  
404  
108  
150  
166  
313  
363  
510  
135  
169  
210  
285  
383  
514  
126  
211  
215  
319  
383  
514  
140  
211  
215  
Table I-PC-3. Isolator load points & types, units with a horizontal discharge, inverted “L”  
configuration, lbs.  
air-cooled models  
water-cooled models  
L1  
L2  
L3  
L4  
L1  
L2  
L3  
L4  
10-tonunit  
spring  
318  
red  
150  
yellow  
363  
red  
169  
yellow  
383  
red  
211  
yellow  
383  
red  
211  
yellow  
rubber-in-shear  
green  
red  
green  
red  
green  
red  
green  
red  
15-tonunit  
404  
166  
510  
210  
514  
215  
514  
215  
spring  
purple yellow purple yellow  
gray red gray red  
purple yellow purple yellow  
gray red gray red  
rubber-in-shear  
Note: Units ship with two different color isolators and should be placed as depicted in this chart to properly support the  
unit weight. See Figures I-PC-1 & I-PC-2 for correct isolator positions by unit size.  
3, 5, & 7.5-ton units  
bottom view of unit  
10 & 15-ton units  
bottom view of unit  
L3  
L4  
L1  
L3  
L4  
L1  
L2  
L2  
1 7/8  
1 3/8  
7
/8” dia. hole under all 4 corners  
9/16” dia. hole under all 4 corners  
1 7/8  
3 3/4  
Figure I-PC-1. Isolator mounting hole locations on 3, 5, &  
7.5-ton units  
Figure I-PC-2. Isolator mounting hole locations on 10 & 15-  
ton units  
PKG-SVX14A-EN  
9
pre-installation  
considerations  
Installation  
Proper Lifting Procedure  
Follow these instructions and reference  
Figure I-PC-3.  
1. Slide a fork lift into the opening  
provided on the unit base. Move the  
fork lift carefully.  
2. Using slings, attach through the circular  
holes provided on the unit base. Protect  
the unit from damage by rigging  
equipment.  
WARNING  
Improper Unit Lift!  
Test lift unit approximately 24 inches  
high to verify the proper center-of-  
gravity lift point. To avoid dropping the  
unit, reposition the lifting point if the  
unit is not level. Failure to properly lift  
the unit could result in death, serious  
injury, or possible equipment/  
property-only damage.  
Figure I-PC-3. Proper unit lifting procedure  
10  
PKG-SVX14A-EN  
dimensions &  
weights  
Installation  
3 & 5-tons  
SCWH/SCRH  
vertical discharge  
horizontal discharge  
(field converted)  
SCRH  
SCWH  
SCWH/SCRH dimensions & weight, in-lbs.  
unit  
size  
shipping  
weight  
operating  
weight  
A
B
C
D
E
F
G
J
K
L
M
N
O
P
Q
R
S
3
31.89 64.17 22.24 5.65 11.93 14.31 10.63 18.00 7.80  
7.80 15.60 15.63 20.20 6.28  
4.33  
5.43  
8.58  
6.38  
4.37  
7.12  
494  
592  
459  
5
36.41 75.98 24.01 7.73 13.03 15.65 11.61 20.31 12.32 8.66 20.98 18.58 24.20 7.10  
555  
PKG-SVX14A-EN  
11  
dimensions &  
weights  
Installation  
7.5-tons  
SCWH/SCRH  
vertical discharge  
horizontal discharge  
(field converted)  
SCWH  
SCRH  
SCWH/SCRH weight, lbs.  
unit  
size  
shipping  
weight  
operating  
weight  
7.5  
702  
657  
12  
PKG-SVX14A-EN  
dimensions &  
weights  
Installation  
10, 12, & 15-tons with top-mounted fan configuration  
SCWH/SCRH  
horizontal discharge  
(field converted)  
vertical discharge  
SCWH  
SCRH  
SCWH/SCRH dimensions & weight, in-lbs.  
unit  
tons  
shipping  
weight  
operating  
weight  
A
B
C
D
E
F
G
J
K
M
N
5
10 66.75 88.78 7.04 18.07 57.28 19.01 25.0  
5.23  
7.48  
7.48  
5.12  
/
8.30  
984  
977  
917  
907  
8
5
12 65.75 92.71 7.04 18.07 61.22 22.95 29.01 5.23  
15 80.31 92.71 19.83 19.83 61.22 22.95 29.01 4.76  
/
12.24  
12.24  
8
3
/
1098  
1021  
4
PKG-SVX14A-EN  
13  
dimensions &  
weights  
Installation  
10, 12, & 15-tons with side-mounted fan configuration, field converted  
SCWH/SCRH  
Notes:  
1. Base rail must be attached to the floor before converting  
unit to side-mounted fan configuration.  
2. Coil or electric heater cannot be assembed inside the  
cabinet with the side-mounted fan configuration.  
SCWH/SCRH Dimensions, in.  
unit  
tons  
A
C
D
E
F
G
10 65.75 7.04 18.07 57.28 66.93 25.79  
12 65.75 7.04 18.07 61.22 66.93 29.73  
15 80.31 19.83 19.83 61.22 81.49 29.73  
14  
PKG-SVX14A-EN  
dimensions &  
weights  
Installation  
Plenum  
Plenum dimensions & weight, in-lbs.  
unit size  
3-ton  
A
B
weight  
44  
31.89  
36.41  
40.94  
65.75  
80.31  
22.24  
24.01  
28.74  
29.52  
29.52  
5-ton  
54  
7.5-ton  
10 & 12-ton  
15-ton  
73  
120  
146  
Hot water coil  
3 & 5-ton units  
A
3.15  
B
5.91  
1.57  
D
G
F
0.28  
E
0.39  
0.39  
C
1.03  
1.03  
1.08  
1.0 NPT  
0.75  
0.75  
5.9  
SCWH/SCRH Hot water coil dimensions & weights, 3 & 5-ton units, in-lbs.  
size  
A
B
C
D
E
F
G
weight  
13  
3-ton  
5-ton  
26.46  
30.98  
18.98  
23.50  
25.67  
30.20  
5.79  
7.040  
5.79  
7.040  
10.00  
12.50  
12.76  
15.26  
18  
PKG-SVX14A-EN  
15  
dimensions &  
weights  
Installation  
Hot water coil  
7.5-ton units  
3.15  
35.51  
1.57  
5.91  
28.03  
0.43  
0.28  
34.72  
0.39  
1.03  
1.08  
0.39  
1.03  
1.0 NPT  
0.75  
0.75  
5.9  
SCWH/SCRH Hot water coil dimensions & weights, in-lbs.  
size  
A
B
C
D
weight  
24  
7.5-ton  
10-ton  
12-ton  
15-ton  
-
-
-
-
58.72  
58.72  
73.29  
50.98  
50.98  
63.98  
6.95  
6.95  
8.52  
59.51  
59.51  
74.07  
49  
49  
55  
Hot water coil  
10 thru 15-ton units  
1.03  
1.08  
1.03  
A
0.39  
0.39  
0.28  
0.43  
C
B
1.57  
3.19  
D
BLOCKOFF (SHIPS DISASSEMBLED)  
1.00 NPT  
0.75  
0.75  
5.90  
16  
PKG-SVX14A-EN  
mechanical  
requirements  
Installation  
Duct Connections  
Cooling Tower Piping  
Water Piping  
Cooling tower control affects the unit  
cycle rates. Condenser water  
temperature swings from 10-15°F may  
cause excessive compressor, water  
valve, and unit cycling. Be sure to set the  
tower controls to minimize compressor/  
unit cycling.  
Install all air ducts according to the  
National Fire Protection Association  
standards for the “Installation of Air  
Conditioning and Ventilation Systems  
other than Residence Type (NFPA 90A)  
and Residence Type Warm Air Heating  
and Air Conditioning Systems (NFPA  
90B).  
Condenser Connections  
Note: To prevent water damage, install  
piping drain and vent plugs.  
Condenser water piping knockouts are in  
the lower left end panel. If necessary,  
remove insulation to gain access. All field  
installed piping must conform to  
applicable local, state, and federal codes.  
To complete condenser water  
connections follow the procedure below.  
1. Remove back panel to access the  
water connection fittings.  
2. Attach the water supply line to the inlet  
connection, and the return line to the  
outlet connection. The water connection  
fittings are copper, so exercise extreme  
care when connecting steel piping to  
copper fittings.  
3. Ensure that water piping is aligned to  
the unit connection fittings. Failure to  
align piping could cause stripped  
threads, leakage, and possible unit  
failure.  
The cooling tower system requires a  
separate drain in the water supply line for  
service and repair.  
Make duct connections to the unit with a  
flexible material such as heavy canvas. If  
a fire hazard exists, Trane recommends  
using Flexweave 1000, type FW30 or  
equivalent canvas. Use three inches for  
the return duct and three inches for the  
discharge duct. Keep the material loose  
to absorb fan vibration.  
Water Temperature Requirements  
Install a water regulating valve in the  
water supply line to maintain head  
pressure when operating with water of  
varying temperature. The valve  
modulates condenser water flow to  
control condensing pressure. The valve  
opens or closes in response to  
compressor discharge pressure as  
sensed by its capillary line connection iin  
the liquid line shrader valve. When the  
valve is properly installed, water flow  
automatically decreases as discharge  
pressure falls and increases as discharge  
pressure rises. Field installation of the  
water regulating valve assembly  
requires one valve for each refrigeration  
circuit.  
Run the ductwork straight from the  
opening for a minimum of three fan  
diameters. Do not make abrupt turns or  
transitions near the unit due to increased  
noise and excessive static losses. Use  
elbows with splitters or turning vanes to  
minimize static losses.  
Poorly constructed turning vanes may  
cause airflow generated noise. Check  
total external static pressures against fan  
characteristics to be sure the required  
airflow is available throughout the  
ductwork.  
4. Connection to the unit water piping  
requires a backing wrench to prevent  
distortion of connecting tubing. Apply  
backing wrench to water connection  
points on unit.  
Condensate Drain Connections  
Install a water regulating valve in the  
water supply line to maintainhead  
pressure when operating with city water  
of varying temperature.  
WARNING  
Hazardous Voltage!  
Disconnect all electric power,  
including remote disconnects before  
servicing. Follow proper lockout/  
tagout procedures to ensure power  
cannot be inadvertently energized.  
Failure to disconnect power before  
servicing could result in death or  
serious injury.  
These units require a minimum water  
pressure of 15 psig and will operate at a  
maximum of 400 psig.  
Provide safeguards against cold weather  
drain line freeze.  
PKG-SVX14A-EN  
17  
mechanical  
requirements  
Installation  
Brazing Procedures  
Refrigerant Piping (Air-Cooled  
UnitsOnly)  
Reference industry recommendations  
for air-cooled unit refrigerant piping. If  
suspendingpipingfromthebuilding, use  
isolation hangers to prevent vibration  
transmission.  
7. Begin brazing when the joint is hot  
enough to melt the brazing rod. The hot  
copper tubing, not the flame, should  
melt the rod.  
8. Continue to apply heat around the joint  
circumference until the brazing material  
is drawn into the joint by capillary  
action, making a mechanically sound  
and gas-tight connection.  
9. Visually inspect the connection after  
brazing to locate any pin holes or  
crevices in the joint. Use a mirror to  
inspect connections that are difficult to  
see.  
Proper brazing techniques are essential  
when installing refrigerant piping. Keep  
the following factors in mind when  
making sweat connections.  
1. When heating copper in the presence  
of air, copper oxide forms. To prevent  
copper oxide from forming inside the  
tubing during brazing, sweep an inert  
gas, such as dry nitrogen, through the  
tubing. Nitrogen displaces air in the  
tubing and prevents oxidation of  
interior surfaces. A nitrogen flow of one  
to three cubic feet per minute is  
sufficient to displace the air. Use a  
pressure regulating valve or flow meter  
to control the flow.  
Air-cooled units ship with a holding  
charge of nitrogen. Before installing unit  
piping, momentarily depress either the  
suction or discharge line access valve to  
verify that the holding charge has not  
been lost. If nitrogen does not escape  
when depressing the access valve, leak-  
test the entire refrigerant system to  
determine the source of loss.  
2. Ensure tubing surfaces that require  
brazing are clean and the ends of the  
tubes are carefully reamed to remove  
any burrs.  
3. Make sure the inner and outer tubes of  
the joint are symmetrical and have a  
close clearance, providing an easy slip  
fit. If the joint is too loose, the tensile  
strength of the connection will be  
significantly reduced. Make the overlap  
distance equal to the inner tube  
diameter.  
4. Wrap the body of each refrigerant line  
component with a wet cloth to keep it  
cool during brazing. Excessive heat can  
damage the components.  
5. If using flux, apply it sparingly to the  
joint. Excess flux will contaminate the  
refrigerant system.  
Electrical Requirements  
The charge is contained by a continuous  
loopofbothhotgasandliquidlines. You  
must cut the loop for connection to  
discharge and liquid lines. See Figure I-  
MR-1.  
Follow these guidelines, referring to unit  
wiring diagrams and supply power  
dimensional information to ensure  
correct electrical requirements at the  
installation site. Reference supply power  
wiring locations on unit submittals orin  
the “Dimensions and Weights” section.  
Specific unit wiring diagrams are  
provided on each unit. Use these  
diagrams for connections or trouble  
analysis.  
WARNING:  
Hazard of Explosion and Deadly  
Gases!  
Never solder, braze or weld on  
refrigerant lines or any unit com-  
ponents that are above atmo-  
spheric pressure or where  
refrigerant may be present.  
Always remove refrigerant by fol-  
lowing the guidelines estab-  
lished by the EPA Federal Clean  
Air Act or other state or local  
codes as appropriate. After refrig-  
erant removal, use dry nitrogen to  
bring system back to atmospheric  
pressure before opening system  
Unit Wiring Diagrams  
Specific unit wiring diagrams are  
provided on the inside of the control  
panel door. Use these diagrams for  
connections or trouble analysis.  
6. Apply heat evenly over the length and  
circumference of the joint, making sure  
the entire joint becomes hot enough to  
melt the brazing material.  
for repairs. Mixtures of refriger-  
ants and air under pressure may  
become combustible in the pres-  
ence of an ignition source leading  
to an explosion. Excessive heat  
from soldering, brazing or weld-  
ing with refrigerant vapors  
present can form highly toxic  
gases and extremely corrosive  
acids. Failure to follow all proper  
safe refrigerant handling prac-  
tices could result in death or seri-  
ous injury.  
Figure I-MR-1. Air-cooled unit refrigerant piping  
18  
PKG-SVX14A-EN  
electrical  
requirements  
Installation  
Electrical Data Calculations  
RLA = rated load amps  
Compressor LRA = locked rotor amps  
Fan motor LRA = locked rotor amps,  
N.E.C. Table 430 - 151  
FLA = Full load amps, N.E.C.  
Table 430 - 150  
In this example, 2.2% imbalance is not  
acceptable. Whenever a voltage  
imbalance of more than 2.0% exists,  
check the voltage at the unit disconnect  
switch. If the imbalance at the unit  
disconnect switch does not exceed 2.0%,  
faulty unit wiring is causing the  
Supply Power Wiring  
It is the installer’s responsibility to provide  
power supply wiring to the unit terminal  
block or the non-fused disconnect switch  
option. WiringshouldconformtoNECand  
all applicable code requirements.  
1. Verify the power supply available is  
compatible with the unit nameplate  
ratings. The supply power must be  
within 10%of the rated voltage listed on  
the unit nameplate.  
imbalance. Conduct a thorough  
Voltage utilization range is 10%  
inspection of the unit electrical wiring  
connections to locate the fault, and make  
any repairs necessary.  
Minimum circuit ampacity (MCA)  
= 1.25 x largest motor amps (FLA or  
RLA) + the sum of the remaining motor  
amps.  
2. Reference the electrical data in Table I-  
ER-1. Protect the electrical service from  
over current and short circuit  
conditions in accordance with NEC  
requirements. Size protection devices  
according to the electrical data on the  
unit nameplate.  
WARNING  
Live Electrical Components!  
Maximum fuse size (MFS) and maximum  
circuit breaker size (MCB) = 2.25 x largest  
motor amps (FLA or RLA) + the sum of  
the remaining motor amps.  
During installation, testing, servicing,  
and troubleshooting this equipment, it  
may be necessary to work with live  
electrical components. Have a  
qualified licensed electrician or other  
individual who is properly trained in  
handling live electrical components  
perform these tasks. Failure to follow  
all electrical safety precautions when  
exposed to live electrical components  
could result in death or serious injury.  
Note: If the rating value determined does  
not equal a standard current rating of  
over current protective device, use the  
next lower standard rating for the  
marked maximum rating.  
3. If using a field-supplied disconnect,  
install it at or near the unit in  
accordance with NEC. Do not mounta  
field-supplied disconnect on the unit.  
Reference the electrical service  
entrance location on unit submittals.  
4. Complete the unit power wiring  
connections onto either the main  
terminal block or the field-provided non-  
fushed disconnect switch.  
Voltage Range  
Voltages must be within +- 10% the  
nameplate voltage. Ensure the unit  
voltage is balanced by measuring at the  
compressor terminals. Voltage imbalance  
on three phase systems can cause motor  
overheating and premature failure.  
Maximum allowable imbalance is 2.0%.  
WARNING  
WARNING  
Ground Wire!  
Hazardous Voltage!  
Voltage Imbalance  
All field-installed wiring must be  
completed by qualified personnel.  
All field-installed wiring must  
comply with NEC and applicable  
local codes. Failure to follow this  
instruction could result in death  
or serious injuries.  
Disconnect all electric power,  
including remote disconnects before  
servicing. Follow proper lockout/  
tagout procedures to ensure power  
cannot be inadvertently energized.  
Failure to disconnect power before  
servicing could result in death or  
serious injury.  
Read the voltage at the compressor  
terminals to determine if it is balanced.  
Voltage imbalance on three phase  
systems can cause motor overheating  
and premature failure. The maximum  
allowable imbalance is 2.0%. Voltage  
imbalance is defined as 100 times the  
sum of the deviation of the three voltages  
from the average (without regard to sign)  
divided by the average voltage. For  
example, if the three measured voltages  
are 221, 230, and 227, the average  
voltage would be:  
WARNING  
Grounding Required!  
Follow proper local and state elec-  
trical code on requirements for  
grounding. Failure to follow code  
could result in death or serious in-  
jury.  
CAUTION  
Use Copper Conductors Only!  
Unit terminals are not designed to  
accept other type conductors. Failure  
to use copper conductors may result  
in equipment damage.  
(221 + 230 + 227) = 226 volts  
3
The percentage of voltage imbalance is  
then:  
100 * (226-221) = 2.2%  
226  
5. Provide proper unit grounding in  
accordance with local and national  
codes.  
PKG-SVX14A-EN  
19  
electrical  
requirements  
Installation  
Table I-ER-1. Model SCWH/SCRHelectrical data  
evaporator standard motor  
evaporator oversized motor  
evap. fan motor  
MFS /  
MCB  
compressor  
RLA LRA  
77.0  
evap. fan motor  
min. circuit  
ampacity  
min. circuit  
ampacity  
model  
tons  
3
voltage  
MFS / MCB  
qty.  
1
hp  
FLA  
qty.  
1
hp  
FLA  
qty  
0.5  
SC*H0303....  
SC*H0304....  
SC*H0305....  
208-230V/60Hz/3Ph  
460V/60Hz/3Ph  
575V/60Hz/3Ph  
12.9  
5.7  
2.21  
1.00  
0.80  
18.3  
8.1  
30  
15  
15  
3.15  
1.42  
1.14  
19.3  
8.5  
30  
15  
15  
1
1
35.0  
31.0  
4.8  
6.8  
7.1  
SC*H0503....  
SC*H0504....  
SC*H0505....  
208-230V/60Hz/3Ph  
460V/60Hz/3Ph  
575V/60Hz/3Ph  
22.9 155.0  
5.00  
2.50  
1.50  
33.6  
15.9  
12.1  
50  
25  
20  
5.81  
2.63  
2.10  
34.4  
16.0  
12.7  
50  
25  
20  
5
1
1
2
2
2
1
2
2
3
3
1
1
1
1
1
2
2
5
5
5
1
1
1
1
1
10.7  
8.5  
75.0  
54.0  
SC*H0753....  
SC*H0754....  
SC*H0755....  
208-230V/60Hz/3Ph  
460V/60Hz/3Ph  
575V/60Hz/3Ph  
27.9 164.0  
13.6 100.0  
6.30  
3.10  
2.40  
41.2  
20.1  
15.2  
60  
30  
25  
5.81  
2.63  
2.10  
40.7  
19.6  
14.9  
60  
30  
25  
7.5  
10  
12  
15  
10.2  
78.0  
SC*H1003....  
SC*H1004....  
SC*H1005....  
208-230V/60Hz/3Ph  
460V/60Hz/3Ph  
575V/60Hz/3Ph  
22.9 155.0  
6.30  
3.10  
2.40  
57.8  
27.2  
21.5  
80  
35  
30  
13.70  
6.18  
4.94  
65.2  
30.3  
24.1  
80  
40  
30  
10.7  
8.5  
75.0  
54.0  
SC*H1203....  
SC*H1204....  
SC*H1205....  
208-230V/60Hz/3Ph  
460V/60Hz/3Ph  
575V/60Hz/3Ph  
25.4 147.7  
9.40  
4.60  
3.40  
66.5  
31.2  
24.4  
90  
40  
30  
13.70  
6.18  
4.94  
70.8  
32.7  
25.9  
90  
45  
35  
11.8  
9.3  
75.0  
59.6  
SC*H1503....  
SC*H1504....  
SC*H1505....  
208-230V/60Hz/3Ph  
460V/60Hz/3Ph  
575V/60Hz/3Ph  
27.9 164.0  
13.6 100.0  
9.40  
4.60  
3.40  
72.2  
35.2  
27.9  
100  
45  
13.70  
6.18  
4.94  
76.5  
36.8  
29.5  
100  
50  
10.9  
78.0  
35  
35  
Notes:  
1. Voltage range:  
Nominal voltage 208 - 230V - acceptable range: 187 - 253V  
Nominal voltage 460V - acceptable range: 414 - 506V  
Nominal voltage 575V - acceptable range: 518 - 633V  
2. Ampacity is calculated per UL formula, ampacity = (1.25 x compressor RLA + sum of the second compressor RLA (if  
used) + evaporator motor FLA  
3. Maximum fuse size is calculated per UL formula, MFS = (2.25 x compressor RLA) + sum of second compressor RLA (if  
used) + evaporator motor FLA  
WARNING  
Hazardous Voltage!  
Disconnect all electric power,  
including remote disconnects before  
servicing. Follow proper lockout/  
tagout procedures to ensure power  
cannot be inadvertently energized.  
Failure to disconnect power before  
servicing could result in death or  
serious injury.  
CAUTION  
Use Copper Conductors Only!  
Unit terminals are not designed to  
accept other type conductors. Failure  
to use copper conductors may result  
in equipment damage.  
20  
PKG-SVX14A-EN  
installation  
procedure  
Installation  
Installation Checklist  
Field Installed Control Wiring (Optional)  
6. Reconnect the motor power wires per  
the unit wiring diagram.  
7. Bolt and/or clamp all brackets back into  
place.  
8. Replace control box cover and all  
exterior panels.  
Complete the field wiring connections.  
Reference the checklist below to verify all  
steps required to successfully install a  
deluxe self-contained unit are complete.  
This checklist is intended to acquaint the  
installing personnel with what is required  
in the installation process. It does not  
replace the detailed instructions detailed  
in the applicable sections of this manual.  
Note: All field installed wiring must  
comply with NEC and applicable local  
codes.  
9. Verify the fan rotation and motor amp  
draw.  
Fan Discharge Conversion  
Complete the steps below to convert the  
fan discharge from vertical to horizontal.  
Plenum Installation  
1. Uncrate the plenum and accessory  
bag.  
WARNING  
1. Remove all mid and top fan section  
panels.  
Hazardous voltage!  
Disconnect all electric power, including  
remote disconnects before servicing.  
Follow proper lockout/tagout procedures  
to ensure the power can not be  
inadvertently energized. Failure to  
disconnect power before servicing  
could result in death or serious  
injury.  
2. Rotate the evaporator blower to the  
vertical discharge configuration.  
3. Apply the soft gasket provided around  
the aluminum frame on top of the unit  
as shown in Figure I-IP-1.  
4. Using a screwdriver, tighten the self-  
drilling screws as shown in Figure I-IP-  
1. Be sure to tighten all screws on the  
rear, right, and left sides through the  
pilot holes on the plenum panels.  
5. When installation is complete, adjust  
the motor pulley and the discharge  
grille for proper airflow.  
2. Loosen the brackets inside the unit that  
clamp the mid and fan sections  
together.  
3. Remove the control box cover and  
disconnect the motor power wires.  
Feed wires up through the unit and  
secure out of the way until rotation is  
complete.  
4. Rotate the fan section to desired  
position.  
5. Re-route the motor power wires back  
to the control box. Ensure all wiring is  
free and not routed over any sharp  
edges.  
General Unit Requirements  
Install and secure the ductwork to the  
unit.  
Check unit for shipping damage and  
material shortage. Refer to the  
Receiving Checklist.  
Electrical Requirements  
Verify that the electrical power supply  
characteristics comply with the unit  
nameplate specifications.  
Inspect all control components; tighten  
any loose connections.  
Connect properly sized and protected  
power supply wiring to a field supplied/  
installed disconnect and unit power  
terminal block, or to the optional unit  
mounted disconnect switch.  
Properly ground the unit.  
Figure I-IP-1. Plenum installation  
PKG-SVX14A-EN  
21  
pre-startup  
requirements  
Installation  
Pre-Startup Checklist  
Complete this checklist after installing the  
unit to verify all recommended  
installation procedures are complete  
before unit startup. This does not replace  
the detailed instructions in the  
appropriate sections of this manual.  
Always read the entire section carefully  
to become familiar with the procedures.  
Unit Location  
Ensure the unit location is adequate for  
unit dimensions, ductwork, piping, and  
electrical connections.  
Ensure access and maintenance  
clearances around the unit are  
adequate. See the “Service Access”  
section.  
Unit Mounting  
Remove shipping brackets on the  
compressor assembly and supply fan.  
WARNING  
Component Overview  
Verify the fan and motor sheaves are  
aligned.  
Check the belt tension for proper  
adjustment.  
Ensure the fan rotates freely.  
Tighten locking screws, bearing set  
screws and sheaves.  
Ensure bearing locking collars do not  
wobble when rotated.  
Ensure all air filters are properly  
installed with consideration of size and  
air flow.  
Manually rotate the evaporator fan to  
ensure free movement. Verify that all of  
the fan mounting hardware is tight.  
Hazardous Voltage!  
Disconnect all electrical power,  
including remote disconnects before  
servicing. Follow proper lockout/tagout  
procedures to ensure power cannot be  
inadvertently energized. Failure to  
disconnect power before servicing  
could result in death or serious injury.  
Receiving  
Inspect unit and components for  
shipping damage. File damage claims  
immediately with the delivering carrier.  
Check nameplate unit data so that it  
matches the sales order requirements.  
Check unit for missing material. Look  
for ship-with accessories that are  
packaged separately and placed inside  
the access panel, fan section, or  
compressor section. See the  
Ductwork  
Verify that all ductwork conforms to  
NFPA 90A or 90B and all applicable  
local codes.  
“Receiving and Handling” section.  
22  
PKG-SVX14A-EN  
Installation  
startup  
Unit Startup Procedures  
1. Check all electrical connections for  
tightness.  
7. Allow unit to run until all system  
temperatures and pressures stabilize.  
2. Be sure all unit accessories are  
properly set and installed.  
3. Model SCWH: Verify condenser  
water piping is properly connected,  
supply, and return.  
4. Model SCRH: Verify refrigerant  
piping is properly connected, hot gas,  
andliquid.  
5. Inspect all ductwork and duct  
connections.  
6. Check for proper belt tension.  
7. Check fan drive sheaves, pulleys, and  
bearings.  
WARNING  
Hazardous Service Procedures!  
The maintenance and trouble-  
shooting procedures recom-  
mended in this section of the  
manual could result in exposure to  
electrical, mechanical or other po-  
tential safety hazards. Always refer  
to the safety warnings provided  
throughout this manual concerning  
these procedures. When possible,  
disconnect all electrical power in-  
cluding remote disconnects before  
servicing. Follow proper lockout/  
tagout procedures to ensure the  
power can not be inadvertently en-  
ergized. When necessary to work  
with live electrical components,  
have a qualified licensed electri-  
cian or other individual who has  
been trained in handling live elec-  
trical components perform these  
tasks. Failure to follow all of the  
recommended safety warnings  
provided, could result in death or  
serious injury.  
Unit Startup Checklist  
1. Turn the thermostat to the OFF  
position.  
2. Engage power supply by closing  
power disconnect.  
3. Switch thermostat to fan position and  
adjust temperature setting below room  
temperature. Evaporator fan should  
start.  
4. Check evaporator section for proper  
operation.  
5. Switch thermostat to cool position and  
adjust temperature setting to below  
room temperature. The evaporator fan  
and compressor(s) should start.  
Note: These units are equipped with high  
efficiency scroll compressors. Check for  
proper scroll rotation prior to operating  
unit.  
WARNING  
Rotating Components!  
During installation, testing, servicing  
and troubleshooting of this product it  
may be necessary to measure the  
speed of rotating components. Have a  
qualified or licensed service individual  
who has been properly trained in  
handling exposed rotating  
components, perform these tasks.  
Failure to follow all safety precautions  
when exposed to rotating  
WARNING  
Hazardous voltage!  
Disconnect all electric power, including  
remote disconnects before servicing.  
Follow proper lockout/tagout procedures  
to ensure the power can not be  
inadvertently energized. Failure to  
disconnect power before servicing  
could result in death or serious  
injury.  
components could result in death or  
serious injury.  
6. Check the evaporator fan for proper  
rotation. If fan rotation is incorrect,  
switch thermostat to Off position and  
disconnect power. Reverse two phase  
leads at disconnect and return back to  
Step 1 of startup.  
8. Check systems for proper operation  
and performance. Observe unit in  
operation and check for unusual noise,  
vibration, belt, and fan clearances.  
PKG-SVX14A-EN  
23  
sequence of  
operation  
Operation  
Sequence of Operation  
the condensing unit from running,  
regardless of the thermostat tempera-  
ture setting. The evaporator fan may  
circulate air if the fan switch is in the On  
position. With the switch in the Cool  
position, the condensing unit and evapo-  
rator will operate on a signal from the  
thermostat calling for cooling.  
The thermostat controls the unit  
operation. It has both manual and  
automatic switches so the thermostat  
maintains desired comfort levels.  
The fan switch allows manual selection of  
the fan speed using the On or Auto  
setting. With the switch set in the On  
position, the evaporator fan runs  
continously, independent from the  
thermostat temperature setting. The  
Auto position cycles the evaporator fan  
on and off with the demand for heating or  
cooling.  
With the fan switch set to Auto and the  
system switch set to Cool, the following  
sequence takes place. On a rise in room  
temperature,t he thermostat contacts  
close to provide power to the evaporator  
fan contactor,t he condensing unit fan  
contactor,a nd the condensingunit  
compressor contactors. As the room  
temperature reaches setpoing, the  
thermostat contacts open to de-energize  
all contactors,a nd the system cycles off.  
This system will remain off until additional  
cooling is required and the cycle repeats.  
The system switch may have two or  
more positions. For example, using a  
cooling only thermostat, the system  
switch can be set in the Off or the Cool  
position. The Off position disconnects  
power from the thermostat contacts that  
control the condensing unit. This prevents  
24  
PKG-SVX14A-EN  
general  
information  
Maintenance  
Table M-GI-1. Midrange maintenance general data  
SCWH030 SCWH050  
SCWH075 SCWH100 SCWH120  
SCWH150  
dimensions, in-lbs.  
height  
length  
66.93  
31.89  
22.24  
78.74  
36.41  
24.01  
78.94  
40.94  
28.74  
91.54  
65.75  
29.52  
95.47  
65.75  
29.52  
95.47  
80.31  
29.52  
depth  
weight (shipping / net)  
cooling performance  
net cooling capacity, btu/h  
EER  
nominal air flow, cfm  
system power, kW  
Copeland scroll compressor  
quantity  
494 / 459  
592 / 555  
702 / 657  
1094 / 1027 1133 / 1063 1249 / 1172  
36000  
12.13  
1200  
3.0  
65290  
12.28  
2000  
5.3  
87570  
11.6  
3000  
7.6  
116986  
11.5  
138204  
11.1  
167303  
11.3  
4000  
10.2  
4800  
12.5  
6000  
14.8  
1
1
1
2
2
2
model  
ZP32  
ZP57  
ZP83  
ZP57  
ZP67  
ZP83  
indoor coil, 3/8" tube size  
face area, sq. ft.  
rows / fpf  
3.19  
4 / 144  
4.98  
4 / 144  
7.13  
3 / 168  
12.12  
2 / 168  
12.12  
2 / 168  
14.56  
3 / 168  
water condenser, tube & tube  
water connection, in.  
indoor fan, belt-driven  
quantity  
3/4 NPT  
3/4 NPT  
3/4 NPT  
1 1/4 NPT  
1 1/4 NPT  
1 1/4 NPT  
1
1
2
2
2
2
diameter x width  
motor  
motor frame size  
air filter, 1" throwaway  
9 x 9  
1 / 0.5  
56  
10 x 10  
1 / 1.0  
56  
9 x 9  
1 / 2.0  
56  
12 x 12  
1 / 2.0  
56  
12 x 12  
1 / 3.0  
56  
12 x 12  
1 / 3.0  
56  
14 x 20 (1) +  
20 x 20 (1)  
18 x 24 (3) +  
24 x 24 (1)  
12 x 24 (1) + 24 x 24 (2)  
size / (quantity), in.  
14 x 25 (1)  
18 x 24 (2)  
refrigerant, R-410A, TXV control  
refrigerant charge (Ckt 1 / 2), lbs.  
hot water coil, 2-row, 108 fpf, 1/2" tubes  
face area, sq. ft.  
3.8  
5.4  
7.8  
5.1 / 5.2  
6.2  
6.5/6.3  
6.2  
7.2/7.2  
7.78  
1.42  
2.08  
3.27  
Notes:  
1. Net cooling capacity is rated at 95°F ambient, 80°F entering dry bulb and 67°F entering wet bulb @ SCFM air condition.  
2. EER is rated at ARI condition.  
PKG-SVX14A-EN  
25  
maintenance  
procedures  
Maintenance  
Maintenance Procedures  
This section describes specific  
maintenance procedures that must be  
preformed as a part of the normal  
maintenance program. Always  
disconnect electrical power to the unit  
before performing these procedures and  
heed all warnings and cautions.  
Note: the following coil cleaning proce-  
dures apply only to the outdoor condens-  
ers. Do not use these procedures for the  
reheat or evaporator coils.  
Coil Cleaning Procedure  
1. Disconnect power to the unit.  
2. Remove panels from the unit to gain  
access to the coil.  
3. Use a soft brush to remove loose dirt  
and debris form both sides of the coil.  
4. Straighten coil fins with fin comb as  
required.  
5. Mix the detergent with water  
according to the manufacturers  
instructions.  
Cleaning the Condenser Coils  
Clean the coil at least once each year or  
more frequently if located in a dirty  
environment, to help maintain proper unit  
operating efficiency. High discharge  
pressures are a good indication that the  
coil needs cleaning. Follow the detergent  
manufacturer instructions as closely as  
possible to avoid potential coil damage.  
WARNING  
Live Electrical Components!  
During installation, testing, servicing,  
and troubleshooting this equipment, it  
may be necessary to work with live  
electrical components. Have a  
qualified licensed electrician or other  
individual who is properly trained in  
handling live electrical components  
perform these tasks. Failure to follow  
all electrical components could result  
in death or serious injury.  
Observe all recommendations of the  
cleanser manufacturer. The coil cleanser  
manufacturer’s recommendations,  
warnings and cautions will at all times  
take precedence to these instructions.  
1. Place solution in the sprayer. Be sure to  
follow these guidelines if using a high-  
pressure sprayer:  
a) Keep minimum nozzle spray angle 15°.  
b) Spray solution at a 90° angle to the coil  
face.  
c) Keep sprayer nozzle at least six inches  
from the coil.  
d) Sprayer pressure must not exceed  
600 psi.  
2. Spray leaving air side of the coil first  
then spray the entering air side of the  
coil. Allow the detergent and water  
solution to stand on the coil for five  
minutes.  
3. Rinse both sides of the coil with cool,  
clean water.  
4. Inspect the coil. If it still appears dirty,  
repeat the cleaning procedure.  
5. Reinstall all unit components and  
panels, and restore electrical power  
and gas supply to the unit.  
WARNING  
Hazardous Chemicals!  
Coil cleaning agents can be either acidic  
or highly alkaline.Handle chemical  
carefully. Proper handling should  
include goggles or face shield, chemical  
resistant gloves, boots, apron, or  
protective suit as required. For personal  
safety, refer to the cleaning agent  
manufacturer’s materials safety data  
sheet and follow all recommended safe  
handling practices. Failure to follow all  
safety instructions could result in death  
or serious injury.  
WARNING  
Hazardous Voltage!  
Disconnect all electrical power including  
remote disconnects before servicing  
unit. Follow proper lockout/tagout  
procedures to ensure power cannot be  
inadvertently energized. Failure to  
disconnect power before servicing can  
result in death or serious injury.  
To clean the refrigerant coil, use a soft  
brush and sprayer, such as a garden  
pump up or high pressure type . In  
addition, use a quality detergent; like  
“SPREX AC’, “ OAKITE 161” or “OAKITE  
166” and “COILOX.”  
Periodic Maintenance Checklist  
Inspect coil surface for cleanliness.  
Clean as required, referring to the “Coil  
Cleaning” section.  
Note: If detergent is strongly alkaline (i.e.  
has a pH value greater that 8.5 ) after  
mixing, you must add an aluminum  
corrosion inhibitor.  
CAUTION  
Freezing Temperatures!  
Do not allow liquid refrigerant to come  
into contact with the skin. If it does,  
treat the injury similar to frostbite.  
Slowly warm the ffected area with  
lukewarm water and seek immediate  
medical attention. Direct contact with  
liquid refrigerant may cause minor or  
moderate injury.  
Annual Maintenance Checklist  
Perform all monthly maintenance  
inspections.  
Perform seasonal startup checks.  
Leak test refrigerant circuits. Inspect  
contacts of fan motor contactors and  
relays. Replace all worn contacts.  
Clean and repaint any corroded  
surface.  
WARNING  
Hazardous Voltage!  
Disconnect all electrical power including  
remote disconnects before servicing  
unit. Follow proper lockout/tagout  
procedures to ensure power cannot be  
inadvertently energized. Failure to  
disconnect power before servicing can  
result in death or serious injury.  
26  
PKG-SVX14A-EN  
maintenance  
procedures  
Maintenance  
Refrigerant System  
In the event of required system repair,  
leak test the liquid line, evaporator coil,  
and suction line at pressures dictated by  
local codes, and using the following  
guidelines.  
1. Charge enough refrigerant and dry  
nitrogen into the system to raise the  
pressure to 100 psig.  
2. Use a halogen leak detector, halide  
torch, or soap bubbles to check for  
leaks. Check interconnecting piping  
joints, the evaporator coil connections,  
and all accessory connections.  
3. If a leak is detected, release the test  
pressure, break the connections and  
reassemble it as a new joint, using  
proper brazing techniques.  
4. If no leak is detected, use nitrogen to  
increase the test pressure to 150 psig  
and repeat the leak test. Also, use soap  
bubbles to check for leaks when  
nitrogen is added.  
To assist in reducing power generation  
emissions, always attempt to improve  
equipment performance with improved  
maintenance and operations that will  
help conserve energy resources.  
Special Note on Refrigerant Emissions  
Follow the Trane recommended  
procedures on operation, maintenance,  
and service to ensure refrigerant  
conservation and emission reduction.  
Also, pay specific attention to the  
following:  
• Whenever removing refrigerant from  
equipment, recover for reuse, recycle,  
reprocess (reclaim), or properly destroy  
it.  
• Always determine possible refrigerant  
recycling or reclaiming requirements  
before beginning recovery. Questions  
about recovered refrigerants and  
acceptable refrigerant quality  
standards are addressed in ARI  
Standard 700.  
• Use approved containment vessels and  
safety standards. Comply with all  
applicable transportation standards  
when shipping refrigerant containers.  
To minimize emissions while recovering  
refrigerant, use recycling equipment.  
Always attempt to use methods that  
pull the lowest possible system vacuum  
while recovering and condensing  
refrigerant into containment.  
• When leak checking with trace  
refrigerant and nitrogen, use HCFC22  
(R22) rather than CFC12 (R12) or any  
other fully halogenated refrigerants. Be  
aware of any new leak test methods  
that eliminate refrigerant as a trace gas.  
• When cleaning system components or  
parts, do not use CFC11 (R11) or  
CFC113 (R113). Refrigeration system  
clean up methods using filters and  
dryers are recommended. Do not use  
solvents that have ozone depletion  
factors. Properly dispose of used  
materials.  
WARNING  
Confined Space Hazards!  
Do not work in confined spaces where  
sufficient quantities of refrigerant or  
other hazardous, toxic, or flammable  
gas may be leaking. Refrigerant or  
other gases could displace available  
oxygen to breathe, causing possible  
asphyxiation or other serious health  
risks. Some gases may be flammable  
and or explosive. Evacuate the area  
immediately and contact the proper  
rescue or response authority. Failure  
to take appropriate precautions or to  
react properly to a potential hazard  
could result in death or serious injury.  
5. Retest the system to make sure new  
connections are solid.  
6. If a leak is suspected after the system  
has been fully charged with refrigerant,  
use a halogen leak detector, halide  
torch, or soap bubbles to check for  
leaks.  
WARNING  
Hazard of Explosion!  
Use only dry nitrogen with a pressure  
regulator to pressurize the unit. Do not  
use acetylene, oxygen, compressed  
air, or mixtures containing them.  
Do not use mixtures of a hydrogen  
containing refrigerant and air above  
atmospheric pressure for pressure  
testing as they may become  
flammable and could result in an  
explosion. Refrigerant, when used as  
a trace gas should only be mixed with  
dry nitrogen for pressurizing units.  
Failure to follow these  
Refrigerant Evacuation  
For field evacuation, use a rotary style  
vacuum pump capable of pulling a  
vacuum of 100 microns or less.  
When connecting the vacuum pump to a  
refrigeration system, it is important to  
manifold the pump to both the high and  
low side of the system. Follow the pump  
manufacturer’s directions.  
WARNING  
Use of Pressure Regulator –  
Valves – Gauges!  
Always use pressure regulators,  
valves, and gauges to control drum  
and line pressures when pressure  
testing equipment. Failure to follow  
these instructions could result in an  
explosion causing death, serious  
injury, or equipment damage.  
recommendations could result in  
death, serious injury, equipment, or  
property-only damage.  
Take extra care to properly maintain all  
service equipment directly supporting  
refrigerant service work such as  
gauges, hoses, vacuum pumps, and  
recycling equipment.  
• Stay aware of unit enhancements,  
conversion refrigerants, compatible  
parts, and manufacturer’s  
recommendations that reduce  
refrigerant emissions and increase  
equipment operating efficiencies.  
Follow specific manufacturer’s  
guidelines for conversion of existing  
systems.  
WARNING  
Leak Testing!  
Do not exceed 200 psig when leak  
testing system. Failure to follow these  
instructions could result in an  
explosion causing death or serious  
injury.  
PKG-SVX14A-EN  
27  
maintenance  
procedures  
Maintenance  
Charging the Refrigerant System  
To completely charge the system, charge  
gaseous refrigerant into the suction line  
shrader valve with the unit running.  
However, make sure that some  
refrigerant is present in each circuit  
before starting the compressors.  
CAUTION  
Motor Winding Damage!  
Do not use a megohm meter or apply  
greater than 50 VDC to a compressor  
motor winding while it is under a  
deep vacuum. Voltage sparkover may  
cause damage to the motor windings.  
CAUTION  
Compressor Damage!  
Do not allow liquid refrigerant to enter  
the suction line. Excessive liquid  
accumulation in the liquid lines may  
result in compressor damage.  
WARNING  
Hazardous Pressures!  
If a heat source is required to raise  
the tank pressure during removal of  
refrigerant from cylinders, use only  
warm water or heat blankets to raise  
the tank temperature. Do not exceed  
a temperature of 150°F. Do not, under  
any circumstances, apply direct flame  
to any portion of the cylinder. Failure  
to follow these safety precautions  
could result in a violent explosion,  
which could result in death or serious  
injury.  
CAUTION  
Compressor Damage!  
Never manually or automatically  
pump down below 7 psig. This may  
cause the compressor to operate in a  
vacuum and result in compresor  
damage.  
Table M-MP-1. Normal operation condition  
water-cooled  
air-cooled  
high pressure  
low pressure  
superheat  
280 to 430 psig  
320 to 570 psig  
100 to 160 psig  
4 to 9°F  
5 to 10°F  
subcooling  
Table M-MP-2. Controls adjustment  
control  
disarming  
rearming  
high pressure control (air-cooled & 12-ton water cooled)  
624 17.5 psig  
464 29 psig  
unit (ton / voltage)  
high pressure control (water-cooled except 12-ton)  
low pressure contol  
450 10 psig  
51 7 psig  
266 5F  
348 14.5 psig  
94 7 psig  
194 5  
198  
3 / 204-230 & 575  
5 / 208-230  
275 5F  
266 5F  
198  
5 / 575  
motor windings thermostat, standard motor only  
194 5F  
248 5F  
194 5F  
221 5F  
135  
156  
135  
142  
7.5 - 10 / 208-230  
7.5 - 10 / 575  
12 - 15 / 208-230  
12 - 15 / 575  
28  
PKG-SVX14A-EN  
periodic  
checklists  
Maintenance  
Periodic Checklists  
interference with fan blades. Remove  
obstructions and debris. Center the fan  
wheel if necessary.  
4. Check the fan assembly sheave  
alignment. Tighten set screws to their  
proper torques.  
5. Inspect the thermal expansion valve  
sensing bulbs for cleanliness, good  
contact with the suction line, and  
Monthly Checklist  
The following checklist provides the  
recommended maintenance schedule to  
keep the unit running efficiently.  
adequate insulation from ambient air.  
WARNING  
WARNING  
Live Electrical Components!  
During installation, testing, servicing,  
and troubleshooting this equipment, it  
may be necessary to work with live  
electrical components. Have a  
qualified licensed electrician or other  
individual who is properly trained in  
handling live electrical components  
perform these tasks. Failure to follow  
all electrical components could result  
in death or serious injury.  
Note: Perform this procedure monthly if  
the unit is in a coastal or corrosive  
environment.  
Hazardous Voltage!  
Disconnect all electrical power including  
remote disconnects before servicing  
unit. Follow proper lockout/tagout  
procedures to ensure power cannot be  
inadvertently energized. Failure to  
Annual Maintenance  
Check and tighten all set screws, bolts,  
disconnect power before servicing could locking collars and sheaves.  
result in death or serious injury.  
1. Inspect, clean, and tighten all electrical  
connections.  
2. Visually inspect the entire unit casing  
for chips or corrosion. Remove rust or  
corrosion and repaint surfaces.  
3. Visually check for leaks in refrigerant  
piping.  
4. Inspect fan, motor, and control  
contacts. Replace badly worn or eroded  
contacts.  
1. Inspect unit air filters. Clean or replace  
if airflow is blocked or if filters are dirty.  
2. Inspect coils for icing. Icing on the coils  
may indicate low airflow supply,  
restricted airflow from dirty fins.  
3. Check the fan belt condition and  
tension. Adjust tension if belt is floppy or  
squeals continually.  
4. Check and record operating pressures.  
Semi-Annual Maintenance  
1. Verify the fan motor is properly aligned  
and bolted tight to the motor frame.  
2. Lubricate fan bearings.  
3. With power disconnected, manually  
rotate the fan wheel to check for  
obstructions in the housing or  
WARNING  
Rotating Components!  
During installation, testing, servicing  
and troubleshooting of this product it  
may be necessary to measure the  
speed of rotating components. Have a  
qualified or licensed service individual  
who has been properly trained in  
handling exposed rotating  
components, perform these tasks.  
Failure to follow all safety precautions  
when exposed to rotating  
components could result in death or  
serious injury.  
PKG-SVX14A-EN  
29  
Maintenance  
troubleshooting  
WARNING  
Hazardous voltage!  
Disconnect all electric power, including  
remote disconnects before servicing.  
Follow proper lockout/tagout procedures  
to ensure the power can not be  
inadvertently energized. Failure to  
disconnect power before servicing  
injury.  
could result in death or serious  
Troubleshooting  
Use the following steps and procedures to help correct these common problems.  
Problem  
Remedy  
The entire unit does not operate.  
Possible cause  
1. Power interruption  
1. Check for blown fuses or tripped circuit breakers. Replace or reset if necessary.  
2. Setting may be too high; check unit and reset. Thermostat may be out of calibration  
or otherwise defective; replace.  
2. Thermostat not operating  
3. Electrical panel: a) 24-volt transformer  
defective; b) loose wire  
3. Correct as required.  
Problem  
Remedy  
Fan runs but compressor does not start.  
Possible cause  
1. Low voltage  
1. Check power supply for voltage outside the acceptable voltage range.  
2. Check the control unit for loose wires. Firm any loose connections.  
3. Replace.  
2. Remote thermostat  
4. Check for loose wire connection, broken or burned contacts. If defective, replace.  
5. Locate leak and repair. Recharge unit.  
6. Tug on wires to see if they will separate from connections. Replace terminals if  
necessary.  
7. Check for shorts, opens, and grounded. Remove and replace compressor.  
8. Remove and replace.  
3. Compressor contactor open or burned  
4 .High pressure control cutting out unit  
5. Refrigerant leak - no gas  
6. Loose or defective wires.  
7. Compressor shorted, open or burned  
8. Defective compressor  
Problem  
Remedy  
Unit held off by safety.  
Possible cause  
1. Unit cutout on high pressure control, set at  
385 psig  
2. Refrigerant leak  
3. Air restriction, dirty coils  
4. Partial restriction in refrigerant system  
5. High pressure control  
6. TXV power element charge loss  
7. Loose connection in electrical unit  
1. Adjust tubes by bending slightly to firm position without touching other unit parts.  
2. Level unit base. Fully support base.  
3. Check and tighten loose screws.  
4. Tighten screws on fan wheel shaft.  
5. Adjust wheel position on motor shaft  
6. Replace fan motor.  
7. Replace fan bearing.  
Problem  
Remedy  
Noisy operation.  
Possible cause  
1. Copper tubing vibrating  
2. Machine vibrating out of level  
2. See if unit is low on refrigerant charge. Repair leak and recharge unit.  
3. Verify if the air filter is dirty or has an airflow restriction, and correct problem.  
4. Locate restriction by inspecting refrigerant lines for temperature changes. Remove  
restriction, evacuate, and recharge.  
5. Replace, if defective.  
6. Evacuate, replace element, recharge.  
7. Trace and firm up connection.  
30  
PKG-SVX14A-EN  
Maintenance  
troubleshooting  
WARNING  
Problem  
Insufficientcooling  
Possible cause  
Hazardous voltage!  
Disconnect all electric power, including  
remote disconnects before servicing.  
Follow proper lockout/tagout procedures  
to ensure the power can not be  
inadvertently energized. Failure to  
disconnect power before servicing  
could result in death or serious  
injury.  
1. Insufficient air flow due to: a) dirty  
evaporator; b) ice on evaporator coils  
(indicates airflow restriction through  
evaporator); c) dirty filter; d)  
obstructed discharge air intake; e)  
fan motor not running; f) evaporator  
fan or fan wheel slipping on motor  
shaft  
2. Heat gain or loss in room exceeds  
unit capacity  
3. Defective compressor  
4. Insufficient refrigerant charge  
indicated  
by: a) low wattage; b) condenser air  
outletcold  
5. Overcharge of refrigerant indicated  
by high wattage and sweating of the  
compressor return line  
6. Thermostat not set for full cooling  
7. Insufficient airflow through  
condenser  
due to: a) dirty condenser; b) loose belt;  
c) fan loose on shaft  
8. Cutout on high pressure  
9. Only one refrigerant circuit  
operational  
Remedy  
1. Correct as follows: a) clean; b) defrost (using fan operation only); c) clean or  
replace filter; d) remove obstruction; e) check electrical system; f) adjust fan  
position. Tighten set screw on fan wheel.  
2. Refer to original load calculations. Recalculate heat gain or loss.  
3. Replace, if necessary.  
4. Check refrigerant charge pressure with gauges. If refrigerant is low, recharge  
system.  
5. Reclaim excess refrigerant.  
6. Refer to thermostat operating instructions.  
7. Correct as follows: a) clean coil; b) verify drive is adjusted correctly; c) tighten fan  
on shaft.  
8. See that air is flowing and that damper is set properly.  
9. Reset high pressure cutout on inoperative circuit. Check contactor in inoperative  
circuit.  
in 2-circuit units  
Problem  
Remedy  
Unit short cycles  
1. Repair or replace.  
Possible cause  
2. Trace and repair.  
1. Remote thermostat  
2. Loose connection in electrical unit  
3. Thermostat contacts fluttering  
4. Air flow to evaporator is restricted  
5. Insufficient charge  
3. Repair or replace.  
4. Flush or blow dirt out of coil.  
5. Reclaim, evacuate, recharge per nameplate.  
Problem  
Remedy  
Compressor starts and runs, but fan  
does  
1. Replace.  
2. Replace.  
not run.  
Possible cause  
3. Adjust fan mounting.  
1. Faulty switch  
2. Open fan motor coil circuit  
3. Fan binding on shroud or venturi ring  
PKG-SVX14A-EN  
31  
typical wiring  
diagram  
Maintenance  
32  
PKG-SVX14A-EN  
typical wiring  
diagram  
Maintenance  
PKG-SVX01A-EN  
33  
typical wiring  
diagram  
Maintenance  
34  
PKG-SVX14A-EN  
typical wiring  
diagram  
Maintenance  
PKG-SVX01A-EN  
35  
Literature Order Number  
Date  
PKG-SVX14A-EN  
October 2008  
Supersedes  
PKG-SVX14A-EN September2007  
Trane has a policy of continuous productand product dataimprovement and reserves the right to changedesign  
and specifications without notice.  
For more information, contact your local Trane  
office or e-mail us at [email protected]  

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