11. Route equalizer tube through suction connection opening
(large hole) in fitting panel and install fitting panel in place.
12. Sweat inlet of TXV, marked “IN,” to liquid line. Avoid
excessive heat which could damage valve.
13. Install vapor elbow (See Fig. 6B) with equalizer adapter to
vapor line of line set and vapor connection to indoor coil.
Adapter has a 1/4-in. male flare connector for attaching
equalizer tube. (See Fig. 6B.)
14. Connect equalizer tube of TXV to 1/4-in. equalizer fitting on
vapor line adapter. Use backup wrench to prevent damage to
equalizer fitting.
15. Proceed with remainder of unit installation.
LONG-LINE APPLICATIONS, INSTALL LIQUID-LINE
SOLENOID VALVE (LSV)
For refrigerant piping arrangements with equivalent lengths
greater than 50 ft or when elevation difference between indoor
and/or outdoor unit is greater than ± 20 ft, follow all requirements
of the Long-Line Guideline section in the Application Guideline
and Service Manual—Air Conditioners and Heat Pumps Using
Puron® Refrigerant. If required by Long-Line Application Guide-
line, install LSV kit P/N KHALS0401LLS specifically designed
for Puron® Heat Pump. LSV should be installed between filter
drier and indoor coil as close as possible to outdoor unit (within 2
feet). (See Fig. 12 for wiring diagram.) Follow the Installation
Instructions included with accessory kit.
IMPORTANT:
Flow arrow must point toward outdoor unit.
Step 7—Make Piping Connections
Relieve pressure and recover all refrigerant before system
repair or final unit disposal to avoid personal injury or death.
Use all service ports and open all flow-control devices,
including solenoid valves.
Do not leave system open to atmosphere any longer than
minimum required for installation. POE oil in compressor is
extremely susceptible to moisture absorption. Always keep
ends of tubing sealed during installation.
If ANY refrigerant tubing is buried, provide a 6 in. vertical
rise at service valve. Refrigerant tubing lengths up to 36 in.
may be buried without further special consideration. Do not
bury lines for lengths over 36 in.
Outdoor units may be connected to indoor section using accessory
tubing package or field-supplied refrigerant grade tubing of correct
size and condition. Tubing diameters listed in Table 1 are adequate
for equivalent lengths up to 50 ft. For tubing requirements beyond
50 ft, substantial capacity and performance losses will occur.
Follow the recommendations in the Application Guideline and
Service Manual—Air Conditioners and Heat Pumps Using Pu-
ron® Refrigerant to minimize losses.
Refer to Table 1 for field tubing diameters. Refer to Table 2 for
accessory requirements.
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
These outdoor units are carefully evaluated and listed with specific
indoor coils for proper system performance.
IMPORTANT:
Do not apply to indoor coils that are not factory
approved combinations.
INSTALL ADAPTER TUBE
1. Remove plastic retainer holding outdoor piston in liquid line
service valve.
2. Check to be sure outdoor piston is properly installed in liquid
line service valve.
3. Locate plastic bag taped to unit containing adapter tube.
4. Remove Teflon washer from bag and install on open end of
liquid service valve.
5. Remove adapter tube from bag and connect threaded nut to
liquid service valve. Tighten nut finger tight and then with
wrench an additional 1/2 turn (15 ft-lb). DO NOT OVER-
TIGHTEN!
REFRIGERANT TUBING AND FILTER DRIER
Installation of filter drier in liquid line is required.
Connect vapor tubing to fittings on outdoor unit vapor service
valve. Connect liquid tubing to filter drier. (See Table 1 and Fig.
9.) Connect other end of filter drier to adapter tube on liquid line
service valve.
Fig. 7—Positioning of Sensing Bulb
A00399
SENSING BULB
STRAP
8 O'CLOCK
4 O'CLOCK
Table 1—Refrigerant Connections and
Recommended Liquid and Vapor Tube
Diameters (In.)
UNIT
LIQUID
VAPOR
VAPOR (LONG-LINE)
SIZE
Connection
Diameter
Tube
Diameter
Connection
Diameter
Tube
Diameter
Connection
Diameter
Tube
Diameter
024
3/8
3/8
5/8
5/8
5/8
3/4
036
3/8
3/8
3/4
3/4
3/4
7/8
037,048
3/8
3/8
7/8
7/8
7/8
7/8
060
3/8
3/8
7/8
1-1/8
7/8
1-1/8
Notes:
1. Tube diameters are for lengths up to 50 equivalent ft
2. Do not increase or decrease tubing sizes.
4
