Stellar Industries Air Conditioner 50 Hz H Da018 076 User Manual

INSTALLATION  
INSTRUCTIONS  
STELLAR  
AIR CONDITIONING UNIT  
SPLIT-SYSTEM COOLING  
CONTENTS  
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
GROUND INSTALLATION . . . . . . . . . . . . . . . . . . . . . 3  
ROOF INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 3  
UNIT PLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
VERIFY INDOOR REFRIGERANT ORIFICE . . . . . . . 4  
INSTALLATIONS REQUIRING TXV . . . . . . . . . . . . . 4  
PIPING CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
PRECAUTIONS DURING LINE INSTALLATION . . . . 5  
PRECAUTIONS DURING BRAZING OF LINES. . . . . 6  
PRECAUTIONS DURING BRAZING  
ANGLE VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . 6 & 7  
GENERAL INFORMATION & GROUNDING . . . . . . . . . . 8  
FIELD CONNECTIONS POWER WIRING . . . . . . . . . . . . 8  
FIELD CONNECTIONS CONTROL WIRING . . . . . . . . . . 8  
SYSTEM CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
MEASUREMENT METHOD . . . . . . . . . . . . . . . . . . . . 9  
SUPERHEAT CHARGING METHOD . . . . . . . . . . . . 9  
SYSTEM START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
ENERGIZE CRANKCASE HEATER . . . . . . . . . . . . . 9  
SYSTEM CONTROLLER - HDB076 ONLY . . . . . . . 13  
INSTRUCTING THE OWNER. . . . . . . . . . . . . . . . . . 13  
INDICATIONS OF PROPER OPERATION . . . . . . . 13  
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
MODELS: 10 SEER  
11 SEER  
H*DB012 - 76  
H*DE024 - 60  
H*DH018 - 60  
H*DA018-076  
12 SEER  
50 Hz  
CAUTION: READ ALL SAFETY GUIDES BEFORE  
YOU BEGIN TO INSTALL YOUR UNIT.  
SAVE THIS MANUAL  
035-14562-000 REV A (999)  
Form 550.38-N1Y (999)  
®
550.38-N1Y  
TO  
WEATHERPROOF  
DISCONNECT  
SWITCH  
THERMOSTAT  
BLOWER  
MOTOR  
RELAY  
48OVERHEAD  
CLEARANCE  
REQUIRED  
TO POWER  
SUPPLY  
12REAR  
AND SIDES  
CLEARANCE  
REQUIRED  
NEC CLASS 1  
WIRING  
Sit unit on  
rubber  
NEC CLASS 2  
WIRING  
elevator  
grommets  
to reduce  
noise and  
allow for  
proper  
TO  
COIL  
drainage.  
NOTE: ALL OUTDOOR WIRING  
MUST BE WEATHERPROOF  
24SERVICE  
ACCESS CLEARANCE  
REQUIRED  
SEAL OPENING(S) WITH PERMAGUM OR EQUIVALENT  
FIGURE 1: TYPICAL INSTALLATION  
LOCATION  
Normal operating sound levels may be objectionable if the  
unit is placed directly under windows of certain rooms (bed-  
rooms, study, etc.).  
Before starting the installation, select and check the suitability  
of the location for both the indoor and outdoor unit. Observe  
all limitations and clearance requirements.  
ROOF INSTALLATION  
When installing units on a roof, the structure must be capable  
of supporting the total weight of the unit, including a pad, lin-  
tels, rails, etc., which should be used to minimize the trans-  
mission of sound or vibration into the conditioned space.  
The outdoor unit must have sufficient clearance for air  
entrance to the condenser coil, for air discharge and for ser-  
vice access. See Figure 1.  
If the unit is to be installed on a hot sun exposed roof or a  
black-topped ground area, the unit should be raised suffi-  
ciently above the roof or ground to avoid taking the accumu-  
lated layer of hot air into the outdoor unit.  
UNIT PLACEMENT  
1. Provide a base in the pre-determined location.  
2. Remove the shipping carton and inspect for possible  
damage.  
Provide an adequate structural support.  
3. Compressor tie-down bolts should remain tightened.  
4. Position the unit on the base provided.  
GROUND INSTALLATION  
The unit may be installed at ground level on a solid base that  
will not shift or settle, causing strain on the refrigerant lines  
and possible leaks. Maintain the clearances shown in Figure  
1 and install the unit in a level position. Isolate the base from  
the structure to avoid noise or vibration transmission.  
5. Sit unit on the (4) rubber elevating grommets if provided.  
Use grommet kit 1SG0601 if not provided. These should  
be positioned as shown in Figure 2 to reduce noise and  
allow for proper drainage.  
Isolate the unit from rain gutters to avoid any possible wash  
out of the foundation.  
6. Make a hole(s) in the structure wall large enough to  
accommodate the insulated vapor line, the liquid line and  
the wiring.  
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Coil is under 30 PSIG helium pressure. Relieve pres-  
sure from schrader valve on liquid line side.  
This fitting is a right-hand thread, turn counter-clock-  
wise to remove.  
1. First, relieve the holding charge by depressing the  
Schrader valve located in the end of the liquid line.  
2. Remove the liquid line fitting using 3/4" wrenches, and  
remove the pre-installed orifice with a small diameter  
wire or paper clip.  
3. Remove the new orifice from the packet and verify that it  
is the correct number required. Install this orifice with the  
rounded end toward the coil and the flat end outward per  
Figure 3 on page 4.  
4. Thread the liquid line fitting back in place on the coil.  
Tighten the fitting hand tight and turn an additional 1/8  
turn to seal.  
FIGURE 2 : POSITIONING GROMMETS  
VERIFY INDOOR REFRIGERANT ORIFICE  
Refer to the Tabular Data Sheet for the outdoor unit model  
and installed evaporator coil. Determine the correct orifice for  
that combination.  
If the orifice sizes match, nothing further is required and the  
refrigerant lines may be connected per the outdoor unit  
instruction. However, if another orifice should be used,  
change the orifice in the coil with the following procedure:  
Use 3/4" wrenches to turn fittings. Using pliers will  
cause internal damage to the fitting.  
NOTE: This procedure should be done within 2 minutes to  
keep air and contaminates from entering the coil. If the  
orifice cannot be replaced and the coil resealed within  
2 minutes, then it should be temporarily closed to air  
using masking tape (short term delay) or plugging/cap-  
ping (long term delay). There is no need to purge the  
coil if this procedure is done within the time limit.  
5. Mark the data plate of the coil with the orifice installed.  
INSTALLATIONS REQUIRING TXV  
For installations requiring a TXV, the following are the basic  
steps for installion. For detailed instructions, refer to the  
Installation Instructions accompanying the TXV kit.  
Install TXV kit as follows:  
FIGURE 3 : ORIFICE INSTALLATION  
1. First, relieve the holding charge by depressing the  
Schrader valve located in the end of the liquid line.  
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550.38-N1Y  
Ensure the bulb is making maximum contact. Refer to TXV  
installation instruction for view of bulb location.  
The evaporator coil is under 30 psig pressure.  
2. After holding charge is completely discharged, loosen  
and remove the liquid line fitting from the orifice distributor  
assembly. Note that the fitting has right hand threads.  
In all cases, mount the TXV bulb after vapor line is  
brazed and has had sufficient time to cool.  
3. Remove the orifice from the distributor body using a  
small diameter wire or paper clip. Orifice is not used  
when the TXV assembly is installed.  
a. Bulb should be installed on a horizontal run of the  
vapor line if possible. On lines under 7/8" OD the  
bulb may be installed on top of the line. With 7/8"  
OD and over, the bulb should be installed at the  
position of about 4 or 8 o'clock.  
4. After orifice is removed, install the thermal expansion  
valve to the orifice distributor assembly with supplied fit-  
tings. Hand tighten and turn an additional 1/8 turn to  
seal. Do not overtighten fittings.  
b. If bulb installation is made on a vertical run, the bulb  
should be located at least 16 inches from any bend,  
and on the tubing sides opposite the plane of the  
bend. On vertical bulb installations, the bulb should  
be positioned with the bulb tail at the top, so that the  
bulb acts as a reservoir.  
5. Reinstall the liquid line to the top of the thermal expan-  
sion valve. Hand modify the liquid line to align with cas-  
ing opening.  
6. Install the TXV equalizer line into the vapor line as follows:  
c. Bulb should be insulated using thermal insulation  
provided to protect it from the effect of the surround-  
ing ambient temperature.  
a. Select a location on the vapor line for insertion of the  
equalizer line which will not interfere with TXV bulb  
placement.  
b. Use an awl to punch through the suction tube and  
insert the awl to a depth to achieve a 1/8 inch diam-  
eter hole.  
PIPING CONNECTIONS  
The outdoor condensing unit may be connected to the indoor  
evaporator coil using field supplied refrigerant grade copper  
tubing that is internally clean and dry. Units should be  
installed only with the tubing sizes for approved system com-  
binations as specified in Tabular Data Sheet. The charge  
given is applicable for total tubing lengths up to 15 feet. See  
Application Data Form 690.01-AD1V for installing tubing of  
longer lengths and elevation differences.  
7. Install TXV equalizer line in 1/8 hole previously made in  
vapor line. Equalizer line can be bottomed out in vapor  
line as end of equalizer line is cut on 45 degrees angle to  
prevent blockage. Braze equalizer line making sure that  
tube opening is not brazed closed.  
NOTE: Using a larger than specified line size could result in oil  
return problems. Using too small a line will result in loss  
of capacity and other problems caused by insufficient  
refrigerant flow. Slope horizontal vapor lines at least 1"  
every 20 feet toward the outdoor unit to facilitate proper  
oil return.  
Dry nitrogen should always be supplied through the  
tubing while it is being brazed, because the tempera-  
ture required is high enough to cause oxidation of the  
copper unless an inert atmosphere is provided. The  
flow of dry nitrogen should continue until the joint has  
cooled. Always use a pressure regulator and safety  
valve to insure that only low pressure dry nitrogen is  
introduced into the tubing. Only a small flow is neces-  
sary to displace air and prevent oxidation.  
PRECAUTIONS DURING LINE INSTALLATION  
1. Install the lines with as few bends as possible. Care must  
be taken not to damage the couplings or kink the tubing.  
Use clean hard drawn copper tubing where no apprecia-  
ble amount of bending around obstruction is necessary.  
If soft copper must be used, care must be taken to avoid  
sharp bends which may cause a restriction.  
All connections to be brazed are copper-to-copper and  
should be brazed with a phosphorous-copper alloy material  
such as Silfos-5 or equivalent. DO NOT use soft solder.  
2. The lines should be installed so that they will not obstruct  
service access to the coil, air handling system or filter.  
Install the TXV bulb to the vapor line near the equalizer line,  
using the two bulb clamps furnished with the TXV assembly.  
3. Care must also be taken to isolate the refrigerant lines to  
minimize noise transmission from the equipment to the  
structure.  
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4. The vapor line must be insulated with a minimum of 1/2"  
foam rubber insulation (Arm-A-Flex or equivalent). Liquid  
lines that will be exposed to direct sunlight and/or high  
temperatures must also be insulated.  
Dry nitrogen should always be supplied through the  
tubing while it is being brazed, because the tempera-  
ture required is high enough to cause oxidation of the  
copper unless an inert atmosphere is provided. The  
flow of dry nitrogen should continue until the joint has  
cooled. Always use a pressure regulator and safety  
valve to insure that only low pressure dry nitrogen is  
introduced into the tubing. Only a small flow is neces-  
sary to displace air and prevent oxidation.  
Tape and suspend the refrigerant lines as shown. DO NOT  
allow metal-to metal contact. See Figure 4.  
5. Use PVC piping as a conduit for all underground installa-  
tions as shown in Figure 5. Buried lines should be kept  
as short as possible to minimize the build up of liquid  
refrigerant in the vapor line during long periods of shut-  
down.  
TAPE  
The outdoor units have re-usable service valves on both the  
liquid and vapor connections. The total system refrigerant  
charge is retained within the outdoor unit during shipping and  
installation. The re-usable service valves are provided to  
evacuate and charge per this instruction.  
L I QUI D  
L I NE  
INCORRECT  
Serious service problems can be avoided by taking adequate  
precautions to assure an internally clean and dry system.  
SHEET METAL HANGER  
CORRECT  
INSULATED VAPOR LINE  
PRECAUTIONS DURING BRAZING ANGLE VALVE  
Precautions should be taken to prevent heat damage to  
angle valve by wrapping a wet rag around it as shown in Fig-  
ure 6. Also, protect all painted surfaces and insulation during  
brazing. After brazing - cool joint with wet rag.  
FIGURE 4 : TUBING HANGER  
TO INDOOR COIL  
TO OUTDOOR UNIT  
CAP  
LIQUID LINE  
INSULATED  
VAPOR LINE  
PVC  
This is not a backseating valve. The service access  
port has a valve core. Opening or closing valve does  
not close service access port.  
CONDUIT  
If the valve stem is backed out past the retaining ring,  
the O-ring can be damaged causing leakage or sys-  
tem pressure could force the valve stem out of the  
valve body possibly causing personal injury. In the  
event the retaining ring is missing, do not attempt to  
open the valve.  
FIGURE 5 : UNDERGROUND INSTALLATION  
6. Pack fiber glass insulation and a sealing material such  
as permagum around refrigerant lines where they pen-  
etrate a wall to reduce vibration and to retain some  
flexibility.  
Connect the refrigerant lines using the following procedure:.  
1. Remove the cap and Schrader core from both the liquid  
and vapor angle valve service ports at the outdoor unit.  
Connect low pressure nitrogen to the liquid line service  
port.  
7. See Form 690.01-AD1V for additional piping information.  
PRECAUTIONS DURING BRAZING OF LINES  
2. Braze the liquid line to the liquid valve at the outdoor  
unit. Be sure to wrap the valve body with a wet rag. Allow  
the nitrogen to continue flowing.  
All outdoor unit and evaporator coil connections are copper-  
to-copper and should be brazed with a phosphorous-copper  
alloy material such as Silfos-5 or equivalent. DO NOT use  
soft solder.  
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7. Replace the schrader cores in the liquid and vapor  
valves.  
8. Evacuate the vapor line, evaporator and the liquid line, to  
500 microns or less.  
9. Leak test all refrigerant piping connections including the  
service port flare caps to be sure they are leak tight. DO  
NOT OVERTIGHTEN (between 40 and 60 inch - lbs.  
maximum).  
NOTE: Do not use the system refrigerant in the outdoor unit to  
purge or leak test.  
10. Replace caps on service ports. Do not remove the flare  
caps from the service ports except when necessary for  
servicing the system.  
FIGURE 6 : HEAT PROTECTION  
Do not connect manifold gauges unless trouble is  
suspected. Approximately 3/4 ounce of refrigerant  
will be lost each time a standard manifold gauge  
is connected.  
If visual verification of the valve stem reaching the  
retaining ring is impossible, stop backing outthe.valve  
stem when the slightest increase in resistance is felt.  
Because of the small size and therefore the reduced  
resistance, back out the liquid valve 5 turns maximum  
to prevent going past the retaining ring.  
11. Release the refrigerant charge into the system. Open  
both the liquid and vapor valves by removing the plunger  
cap and with an allen wrench back out counter-clockwise  
until valve stem just touches retaining ring. Release the  
refrigerant charge into the system. See PRECAUTIONS  
DURING BRAZING ANGLE VALVEon page 6.  
3. Carefully remove the brazed plugs from the evaporator  
liquid and vapor connections after relieving the pressure  
in the evaporator.  
Replace plunger cap finger tight, then tighten an additional  
1/12 turn (1/2 hex flat). Cap must be replaced to prevent  
leaks.  
If a leak is suspected, leak test to locate the leak. To verify  
the leak, close the valve to the vacuum pump suction to iso-  
late the pump and hold the system under vacuum. If the  
micron gauge indicates a steady and continuous rise after a  
few minutes, it's an indication of a leak. If the gauge shows a  
rise, then levels off after a few minutes and remains fairly  
constant, its an indication that the system is leak free, but still  
contains moisture and may require further evacuation if the  
reading is above 1000 microns.  
The evaporator is pressurized.  
4. Braze the liquid line to the evaporator liquid connection.  
Thenitrogenshouldnowbeflowingthroughtheevaporator  
coil.  
12. If the refrigerant tubing, indoor evaporator coil or outdoor  
condensing unit has developed a leak during shipment,  
or was, for any other reason, opened to the atmosphere  
for more than four (4) minutes, it is necessary to evacu-  
5. Slide the grommet away from the vapor connection at  
the coil. Braze the vapor line to the evaporator vapor  
connection. After the connection has cooled, slide the  
grommet back into original position.  
6. Protect the vapor valve of the outdoor unit with a wet rag  
and braze the vapor line connection. The nitrogen flow  
should be exiting the system from the vapor service port  
connection. After this connection has cooled, remove the  
nitrogen source from the liquid fitting service port.  
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550.38-N1Y  
ate the system down to at least 500 microns to eliminate  
contamination and moisture in the system.  
POWER  
WIRING  
CONTROL  
WIRING  
LOW VOLTAGE  
JUNCTION BOX  
GROUND  
LUG  
Never attempt to repair any brazed connections while  
the system is under pressure. Personal injury could  
result.  
See “SYSTEM START-UP” on page 9 for checking and  
recording system charge.  
GENERAL INFORMATION & GROUNDING  
Check the electrical supply to be sure that it meets the values  
specified on the unit nameplate and wiring label.  
All outdoor wiring must  
be weatherproof. Use  
copper conductors only.  
Power wiring, control (low voltage) wiring, disconnect  
switches and over current protection to be supplied by the  
installer. Wire size should be sized per NEC requirements.  
FIGURE 7 : TYPICAL FIELD WIRING  
2. The complete connection diagram and schematic wiring  
label is located on the inside surface of the unit electrical  
box cover.  
3. All field wiring to be in accordance with national electrical  
codes (NEC) and/or local-city codes.  
All field wiring must USE COPPER CONDUCTORS  
ONLY and be in accordance with Local, National Fire,  
Safety & Electrical Codes. This unit must be grounded  
with a separate ground wire in accordance with the  
above codes.  
NOTE: A Start Assist Kit is available and recommended for  
long line set applications or in areas of known low volt-  
ageproblems. Ahardstartkitmustbeusedifasolenoid  
valve accessory or non-bleed type expansion device is  
installed.  
The complete connection diagram and schematic wiring label  
is located on the inside surface of the unit electrical box cover  
and this instruction.  
4. Mount the thermostat about 5 ft. above the floor, where it  
will be exposed to normal room air circulation. Do not  
place it on an outside wall or where it is exposed to the  
radiant effect from exposed glass or appliances, drafts  
from outside doors or supply air grilles.  
FIELD CONNECTIONS POWER WIRING  
1. Install the proper size weatherproof disconnect switch  
outdoors and within sight of the unit.  
5. Route the 24-volt control wiring (NEC Class 2) from the  
outdoor unit to the indoor unit and thermostat.  
2. Run power wiring from the disconnect switch to the unit.  
NOTE: To eliminate erratic operation, seal the hole in the wall  
at the thermostat with permagum or equivalent to pre-  
vent air drafts affecting the anticipators in the thermo-  
stat.  
3. Remove the control box cover to gain access to the unit  
wiring. Route wires from disconnect through power wir-  
ing opening provided and into the unit control box as  
shown in Figure 7.  
SYSTEM CHARGE  
4. Install the proper size time-delay fuses or circuit breaker,  
and make the power supply connections.  
The factory charge in the outdoor unit includes enough  
charge for the unit and a most sold matched evaporator.  
Some indoor coil matches may require some additional  
charge. See Tabular Data sheet provided in unit literature  
packet.  
5. Energize the crankcase heater to save time by preheat-  
ing the compressor oil while the remaining installation is  
completed.  
FIELD CONNECTIONS CONTROL WIRING  
Sweat connect units also include sufficient charge for 15 feet  
of lines. See Tabular Data for charge adder for line lengths  
greater than 15 feet.  
1. Route low voltage wiring into bottom of control box as  
shown in Figure 7. Make low voltage wiring connections  
inside the junction box per Figures 8, 9, 10 or 11.  
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The TOTAL SYSTEM CHARGEmust be permanently  
stamped on the unit data plate.  
1. Operate system until temperatures and pressures stabi-  
lize (minimum of 10 minutes).  
2. Measure and record indoor wet bulb (WB) temperature  
using a sling psychrometer and the outdoor dry bulb  
(DB) temperature using a thermometer.  
Total system charge is determined as follows:  
1. Determine outdoor unit charge from tabular data sheet.  
3. Measure and record the suction pressure at the suction  
service valve port.  
2. Determine indoor coil adjustment from tabular data  
sheet.  
4. Using Table 1 on page 12, note the superheat value cor-  
responding to the intersection of the indoor wet bulb and  
the outdoor dry bulb.  
3. Calculate the line charge using the Tabular Data Sheet.  
a. Calculate total length of pre-charged lines for quick  
connect units.  
5. With the superheat value obtained in step 4 and the suc-  
tion pressure value from step 3, find the intersection of  
the values in Table 2 on page 12. This is the required  
suction tube temperature at the suction service valve.  
b. Calculate over 15 feet of sweat lines for sweat con-  
nect units.  
NOTE: The charge for pre-charged lines should be included  
in the system charge shown on the data plate but need  
not be added to the system. If sweat connect lines are  
used, the line charge over 15 feet should be included  
on the data plate and must be added to the system.  
6. To bring the tube temperature in line with the required  
value from Table 2, add refrigerant to the service port to  
cause the tube temperature to fall and reclaim refrigerant  
to cause the temperature to rise.  
Check flare caps on Schrader fittings to be sure they are  
tight. DO NOT OVERTIGHTEN (40-60 inch-lbs. maximum).  
4. Total system charge = item 1 + item 2 + item 3.  
5. Permanently stamp the unit data plate with the total  
amount of refrigerant in the system.  
SYSTEM START-UP  
Use one of the following charging methods whenever addi-  
tional refrigerant is required for the system charge.  
ENERGIZE CRANKCASE HEATER  
If this unit is equipped with a crankcase heater for the com-  
pressor, a warning label with an adhesive back is supplied in  
the unit installation instruction packet. This label should be  
attached to the field supplied disconnect switch where it will  
be easily seen. See below:  
Refrigerant charging should only be carried out by a  
qualified air conditioning contractor.  
In order to energize the crankcase heater:- Set indoor two  
stage cooling thermostat to "OFF" position.- Close the line  
power disconnect to the unit.  
Measurement Method  
IMPORTANT  
If a calibrated charging cylinder or accurate weighing device  
is available, add refrigerant accordingly.  
An attempt to start the compressor without at least 8  
hours of crankcase heat will damage the compressor  
Compressor damage will occur ifsystem is improperly  
charged. On new system installations charge system  
per tabular data sheet for the matched coil and follow  
guidelines in this instruction.  
Check flare caps on service ports to be sure they are leak  
tight. DO NOT OVERTIGHTEN (between 40 and 60 inch -  
lbs. maximum).  
Superheat Charging Method  
NOTE: Use this method only during system maintenace and  
repair.  
Unitary Products Group  
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GROUND.  
LUG  
FIGURE 8 : TYPICAL SINGLE PHASE FIELD WIRING  
FIGURE 9 : TYPICAL THREE PHASE FIELD WIRING  
10  
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FIGURE 10 : TYPICAL FIELD WIRING - AIR HANDLER (H*DB076 & H*DA076 ONLY)  
ALL FIELD WIRING TO BE IN ACCORDANCE WITH NATIONAL ELECTRICAL CODE (NEC) AND/OR LOCAL CODES  
POWER WIRING  
208/230-3-60  
460-3-60  
380/415-3-50  
575-3-60  
POWER  
CONTROL  
FACTORY  
FURNACE TERMINAL BLOCK  
Y
R
W
C
G
24 VOLT  
CONTROL  
WIRING  
L1  
L2  
OUTDOOR  
SECTION  
Y
R
G
W
R
ROOM THERMOSTAT  
BRN  
YEL  
C
Y
GROUND  
SCREW  
X
ALL OUTDOOR WIRING MUST BE WEATHERPROOF. USE COPPER CONDUCTORS ONLY.  
FIGURE 11 : TYPICAL FIELD WIRING - FURNACE (H*DB076 & H*DA076 ONLY)  
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Table 1: SUPERHEAT VALUE  
OUTDOOR DB F  
°
INDOOR WB  
F1  
°
55  
60  
65  
70  
75  
80  
85  
90  
95  
100  
105  
110  
115  
50  
9
7
52  
54  
56  
58  
60  
62  
64  
66  
68  
70  
72  
74  
76  
12  
14  
17  
20  
23  
26  
29  
32  
35  
10  
12  
15  
18  
21  
24  
27  
31  
33  
35  
6
10  
14  
16  
19  
22  
24  
30  
30  
33  
35  
7
10  
13  
16  
19  
21  
24  
27  
30  
33  
6
9
5
8
12  
16  
18  
23  
24  
28  
30  
34  
6
8
12  
15  
18  
21  
25  
28  
31  
35  
5
9
11  
15  
19  
22  
26  
30  
33  
6
9
11  
16  
20  
24  
27  
31  
6
14  
18  
20  
25  
29  
12  
15  
20  
23  
27  
9
6
13  
17  
22  
26  
11  
15  
20  
25  
8
14  
18  
23  
1.  
Evaporator Entering Air °F  
Table 2: TEMPERATURE AND PRESSURE  
SUCTION  
PRESSURE  
PSIG  
(SERVICE  
PORT)  
SUCTION SERVICE VALVE SUPERHEAT °F  
01  
2
4
6
8
10  
12  
14  
16  
18  
20  
22  
24  
26 28 30  
32  
34  
61.5  
64.2  
67.1  
70.0  
73.0  
76.0  
79.2  
82.4  
35  
37  
39  
41  
43  
45  
47  
49  
37 39  
39 41  
41 43  
43 45  
45 47  
47 49  
49 51  
51 53  
41  
43  
45  
47  
49  
51  
53  
55  
43  
45  
47  
49  
51  
53  
55  
57  
45  
47  
49  
51  
53  
55  
57  
59  
47  
49  
51  
53  
55  
57  
59  
61  
49  
51  
53  
55  
57  
59  
61  
63  
51  
53  
55  
57  
59  
61  
63  
65  
53  
55  
57  
59  
61  
63  
65  
67  
55  
57  
59  
61  
63  
65  
67  
69  
57  
59  
61  
63  
63  
67  
69  
71  
59  
61  
63  
65  
67  
69  
71  
73  
61 63 65  
63 65 67  
65 67 69  
67 69 71  
69 71 73  
71 73 75  
73 75 77  
75 77 79  
67  
69  
71  
73  
75  
77  
79  
81  
69  
71  
73  
75  
77  
79  
81  
83  
1.  
Saturation Temperature  
Table 3: R-22 SATURATION PROPERTIES  
PRESSURE  
PSIG  
PRESSURE  
PSIG  
PRESSURE  
PSIG  
PRESSURE  
PRESSURE  
PSIG  
TEMP. F  
TEMP. F  
TEMP. F  
TEMP. F  
TEMP. F  
°
°
°
°
°
PSIG  
45  
46  
47  
48  
49  
76.02  
77.58  
79.17  
80.77  
82.39  
60  
61  
62  
63  
64  
101.62  
103.49  
105.39  
107.32  
109.26  
75  
76  
77  
78  
79  
132.22  
134.45  
136.71  
138.99  
141.30  
90  
91  
92  
93  
94  
168.40  
171.02  
173.67  
176.35  
179.06  
105  
106  
107  
108  
109  
210.75  
213.81  
216.90  
220.02  
223.17  
50  
51  
52  
53  
54  
84.03  
85.69  
87.38  
89.08  
90.81  
65  
66  
67  
68  
69  
111.23  
113.22  
115.24  
117.28  
119.34  
80  
81  
82  
83  
84  
143.63  
145.99  
148.37  
150.78  
153.22  
95  
96  
97  
98  
99  
181.80  
184.56  
187.36  
190.18  
193.03  
110  
111  
112  
113  
114  
226.35  
229.56  
232.80  
236.08  
239.38  
55  
56  
57  
58  
59  
92.56  
94.32  
96.11  
97.93  
99.76  
70  
71  
72  
73  
74  
121.43  
123.54  
125.67  
127.83  
130.01  
85  
86  
87  
88  
89  
155.68  
158.17  
160.69  
163.23  
165.80  
100  
101  
102  
103  
104  
195.91  
198.82  
201.76  
204.72  
207.72  
115  
116  
117  
118  
119  
242.72  
246.10  
249.50  
252.94  
256.41  
12  
Unitary Products Group  
®
550.38-N1Y  
SYSTEM CONTROLLER - HDB076 ONLY  
INDICATIONS OF PROPER OPERATION  
Controls operation as follows:  
Cooling operation is the same as any conventional air condi-  
tioning unit.  
1. RANDOM START - Upon initial application of power and  
a 2.5 second time delay, the compressor contactor will  
be energized.  
The following checks may be made to determine if the sys-  
tem is operating properly:  
2. ANTI-SHORT CYCLE - Once the unit is energized, a  
momentary interruption of power, i.e., thermostat cycling,  
greater than 8 milliseconds, will initiate the compressor  
lockout time delay of five minutes regardless of the con-  
dition of the inputs. Upon completion of the 5 minute  
lockout delay the system will automatically reset allowing  
the compressor contactor to energize.  
1. The outdoor fan should be running, with warm air being  
discharged from the top of the unit.  
2. The indoor blower (furnace or air handler) will be operat-  
ing, discharging cool air from the ducts.  
3. The vapor line at the outdoor unit will feel cool to the  
touch.  
3. SAFETY SWITCH - Upon interruption of power to the  
compressor via the high pressure or low pressure switch,  
the compressor contactor will be locked out indefinitely.  
Reset will occur when the pressure switch recloses and  
power has been removed and reapplied via the system  
circuit breaker or by cycling the thermostat temperature  
setting from maximum cool to maximum heat and back  
to desired cool setting. During lockout the fault indicating  
lamp shall be on.  
4. The liquid line at the outdoor unit will feel warm to the  
touch.  
If unit is not operating properly, check the following items  
before calling a serviceman:  
1. Indoor section for dirty filter.  
2. Outdoor section for leaf or debris blockage.  
4. LOW PRESSURE SWITCH BY-PASS TIME DELAY -  
The low pressure switch is by-passed for a period of 75 -  
105 seconds to allow the system to start and stablize.  
After the delay period has expired the system will then  
be maintained by the low pressure switch. In the event  
that the low pressure switch should open after the delay  
period while the compressor is running the system will  
go into lockout. Note depending upon how the system is  
wired the lockout may automatically be reset or may  
require a manual reset.  
Eliminate problem, turn off the thermostat for 10 seconds and  
attempt start. Wait 5 minutes. If system does not start, call  
service technician.  
MAINTENANCE  
1. Dirt should not be allowed to accumulate on the outdoor  
coils or other parts in the air circuit. Clean as often as  
necessary to keep the unit clean. Use a brush, vacuum  
cleaner attachment, or other suitable means.  
2. The outdoor fan motor is permanently lubricated and  
does not require periodic oiling.  
System Time Delays are as follows: Random Start = 2.5 sec-  
onds; Lockout = 5 minutes; Low Pressure By-pass = 75 - 105  
seconds.  
3. If the coil needs to be cleaned, it should be washed with  
Calgon CalClean (mix one part CalClean to seven parts  
water). Allow solution to remain on coil for 30 minutes  
before rinsing with clean water. Solution should not be  
permitted to come in contact with painted panel surfaces.  
INSTRUCTING THE OWNER  
Assist owner with processing warranty cards. Review Owners  
Guide and provide a copy for the owner guidance on proper  
operation and maintenance. Instruct the owner or the opera-  
tor how to start, stop and adjust temperature setting.  
4. Refer to the furnace or air handler instructions for filter  
and blower motor maintenance.  
When applicable, instruct the owner that the compressor is  
equipped with a crankcase heater to prevent the migration of  
refrigerant to the compressor during the OFFcycle. The  
heater is energized only when the unit is not running. If the  
main switch is disconnected for long periods of shut down, do  
not attempt to start the unit until 8 hours after the switch has  
been connected. This will allow sufficient time for all liquid  
refrigerant to be driven out of the compressor.  
5. The evaporator coil drain pan should be inspected and  
cleaned regularly to prevent odors and assure proper  
drainage.  
WHEN THE SYSTEM IS FUNCTIONING PROPERLY AND  
THE OWNER HAS BEEN FULLY INSTRUCTED, SECURE  
THE OWNER'S APPROVAL.  
The installer should also instruct the owner on proper opera-  
tion and maintenance of all other system components.  
Unitary Products Group  
13  
®
550.38-N1Y  
NOTES:  
14  
Unitary Products Group  
®
550.38-N1Y  
NOTES:  
Unitary Products Group  
15  
®
550.38-N1Y  
NOTES:  
®
Heating and Air Conditioning  
Unitary Products Group  
5005 York Drive, Norman, Oklahoma 73069  
Subject to change without notice. Printed in U.S.A.  
Copyright © by Unitary Products Group 1999. All rights reserved.  
Supersedes: 550.38-N1Y (899)  
550.38-N1Y (999)  

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