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INSTALLATION INSTRUCTIONS

R-22 Split System Heat Pump

428 01 5001 00

7

F. LIQUID LINE FILTER-DRIER

Outdoor units are shipped with an appropriate filter-drier
for installation in the liquid line. Leave the plugs in the tube
ends until the filter-drier is installed. The optimal location
for the filter-drier is close to the indoor coil. Heat pump
filter-driers are “bi-flow” type. Either end can be pointed
towards indoor coil. Refer to Figure 5.

Figure 5

Liquid Line Filter-Drier

Installed at Indoor Coil

38-11-84

Filter-Drier

G. 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 refrigeration 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 and
retainer are 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 Figure 6 and follow these steps for piston
installation:

1.

Remove plastic cap holding piston and retainer 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).
Return retainer to piston  body.

NOTE:

 Small end of retainer fits inside piston body,

with O-ring sealing against inside of piston body

3.

Find plastic bag taped to unit containing copper
adapter tube with brass nut.

4.

Install adapter tube against retainer and thread
brass nut onto liquid service valve. Tighten nut
finger tight, then wrench additional 

½

 turn only.

Service valve bodies are brass and suction tube stub is
copper.

Figure 6

Liquid Service Valve with Piston

and Sweat/Flare Adapter Tube

PISTON  BODY

PISTON

PISTON  RETAINER

SWEAT/FLARE  ADAPTER TUBE

LIQUID
SERVICE
VALVE

BRASS NUT

H. BRAZING CONNECTIONS

!

WARNING

FIRE HAZARD

Failure to remove refrigerant and oil charge before
brazing could result in personal injury, death, and/
or property damage.

Refrigerant and oil mixture could ignite and burn
as it escapes and contacts brazing torch. Make
sure the refrigerant charge is properly removed
from both the high and low sides of the system be‐
fore brazing any component or lines.

Clean line set tube ends with emery cloth or steel brush.
Remove any grit or debris.

Insert line set tube ends into service valve tube stubs.

Apply heat absorbing paste or heat sink product between
service valve and joint. Wrap service valves with a heat
sinking material such as a wet cloth.

Braze joints using a Sil-Fos or Phos-copper alloy.

Summary of Contents for C2H3

Page 1: ...ing manner The signal word CAUTION is used throughout this manual in the following manner Signal Words on Product Labeling Signal words are used in combination with colors and or pictures on product l...

Page 2: ...so that water runoff will not enter the unit Locate unit away from areas where heat lint or exhaust fumes will be discharged onto unit as from dryer vents Locate unit away from recessed or confined a...

Page 3: ...ystem Heat Pump 428 01 5001 00 3 Figure 1 Clearances various examples Wall 6 24 Service Wall Wall Wall 6 6 Post Wall Wall 18 18 18 18 6 6 6 18 18 18 18 24 Service 24 Service 24 Service 24 Service 24 S...

Page 4: ...rm for the unit must be level If installation is on a flat roof locate unit minimum 6 inches above roof level Place the unit over one or more load bearing walls If there are several units mount them o...

Page 5: ...Specifications and Long Line Applications Guideline for line set sizing NOTE Total line set length must not exceed 200 feet NOTE A crankcase heater must be used when the refrigerant line length exceed...

Page 6: ...efrigerant Lines INSULATION SUCTION TUBE LIQUID TUBE OUTDOOR WALL INDOOR WALL LIQUID TUBE SUCTION TUBE INSULATION CAULK HANGER STRAP AROUND SUCTION TUBE ONLY JOIST 1 MIN THROUGH THE WALL SUSPENSION CA...

Page 7: ...ice 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 Return retainer to pi...

Page 8: ...e capable of accurately measuring this vacuum level The deep vacuum method is the most positive way of assuring a system is free of air and water Watch the vacuum gauge as the system is pulling down T...

Page 9: ...main remote electrical disconnect device There may be more than one disconnect device Supply voltage must be 208 230 volts 197 volt minimum to 253 volts maximum 60 Hz single phase Outdoor units are ap...

Page 10: ...LLING OUTDOOR THERMOSTATS SYSTEMS WITH ONE OUTDOOR THERMOSTAT G R W3 C O R G R W 3 C E C W 2 Y W 2 O R C W 2 Y W 2 C L G Y E O R SYSTEMS WITHOUT OUTDOOR THERMOSTATS C G R W 2 C Y O R W 2 SUBBASE THERM...

Page 11: ...fan motor lead from OF2 on control board refer to Figure 12 Tape lead to prevent grounding 3 Restart unit in heating mode allowing frost to accumulate on outdoor coil 4 After a few minutes in heating...

Page 12: ...will default to high speed fan for servicing Reconnect wire after servicing 2 Measure liquid service valve pressure by attaching an accurate gauge to service port 3 Measure liquid line temperature by...

Page 13: ...OUBLESHOOTING Some models are factory equipped with the Comfort Alertt Diagnostics device in the control box refer to Figure 14 Comfort Alert provides around the clock monitoring for common electrical...

Page 14: ...tch present go to Flash Code 1 information Yellow ALERT Flash Code 4 Locked Rotor 1 Run capacitor has failed 2 Low line voltage contact utility if voltage at disconnect is low 3 Excessive liquid refri...

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