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C4H5S, H4H5S, T4H5S: Installation Instructions
Accessory
Accumulator
Ball Bearing Fan Motor
Compressor Start Assist Capacitor and
Relay
Crankcase Heater
Evaporator Freeze Thermostat
Hard Shutoff TXV
Isolation Relay
Liquid Line Solenoid Valve
Low Ambient Switch
Support Feet
*. For tubing line sets between 80 and 200 ft. (24.38 and 60.96 m) and/or 20 ft. (6.09 m) vertical differential, refer to Residential Piping and Long Line Guideline.
†. Additional requirement for Low–Ambient Controller.
Make Piping Connections
WARNING
!
PERSONAL INJURY AND ENVIRONMENTAL HAZARD
Failure to follow this warning could result in personal injury or death.
Relieve pressure and recover all refrigerant before system repair or
final unit disposal. Use all service ports and open all flow-control
devices, including solenoid valves.
Federal regulations require that you do not vent refrigerant to the
atmosphere. Recover during system repair or final unit disposal.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
If ANY refrigerant tubing is buried, provide a 6–in (152.4 mm) vertical
rise at service valve. Refrigerant tubing lengths up to 36–in (914.4
mm). may be buried without further special consideration. Do not bury
lines longer than 36 in (914.4 mm).
Outdoor units may be connected to indoor section using accessory
tubing package or field–supplied refrigerant grade tubing of correct size
and condition. For tubing requirements beyond 80 ft, substantial
capacity
and
performance
recommendations in the Residential Piping and Long Line Guideline
will reduce these losses. Refer to
Refer to
Table 2
for field tubing diameters.
There are no buried–line applications greater than 36 in. (914.4 mm)
If refrigerant tubes or indoor coil are exposed to atmosphere, they must
be evacuated to 500 microns to eliminate contamination and moisture in
the system.
Outdoor Unit Connected To Factory Approved Indoor
Unit
Outdoor unit contains approximate system refrigerant charge for
operation with approved AHRI rated indoor unit when connected by 15
ft (4.57 m) of field–supplied or factory–accessory tubing, and factory
supplied filter drier. Some indoor units require additional subcooling to
achieve optimal heating performance.
Subcooling Required, check refrigerant charge for maximum efficiency
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 1 – Accessory Usage
REQUIRED FOR LOW–AMBIENT
COOLING APPLICATIONS
(Below 55°F / 12.8°C)
Standard
†
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Recommended
losses
can
occur.
Following
Table 1
for accessory requirements.
Using
Table 4
– Additional
REQUIRED FOR
LONG LINE APPLICATIONS
Standard
No
Yes
Yes
No
Yes
No
See Long–Line Application Guideline
No
No
Service Valves
Service valves are closed and plugged from the factory. Outdoor units
are shipped with a refrigerant charge sealed in the unit. Leave the service
valves closed until all other refrigerant system work is complete or the
charge will be lost. Leave the plugs in place until line set tubing is ready
to be inserted.
Heat pumps require a piston metering device in the liquid service valve
for proper heating operation. Piston is shipped in the piston body of the
liquid service valve, temporarily held in place with a plastic cap. Do not
remove the plastic cap until line set tubing is ready to be installed.
Refer to
Fig. 3
and follow these steps for piston installation:
1. Remove plastic cap holding piston in piston body of liquid service
valve.
2. Check that piston size (stamped on side of piston) matches with
number listed on unit rating plate. Return piston to piston body of
liquid service valve (either direction).
3. Find plastic bag taped to unit containing copper adapter tube, brass
nut, and plastic washer.
4. Install plastic washer in the seat inside piston body.
5. Fit brass nut onto adapter tube and install tube onto liquid service
valve. Tighten nut finger tight, then wrench additional ½ turn only
[15-ft lbs (20.3 N-m)]. Over tightening may damage the plastic
washer and service valve's piston body.
the
Fig. 3 – Liquid Service Valve with Heating Piston and Adapter Tube
3
REQUIRED FOR
SEA COAST
*
APPLICATIONS (Within 2
miles / 3.22 km)
Standard
No
No
No
No
No
No
No
No
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