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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.
To prevent damage to unit or service valves observe the
following:
• Use a brazing shield
• Wrap service valves with wet cloth or use a heat sink
material.
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 50 ft, substan-
tial capacity and performance losses can occur. Following the
recommendations in the Application Guideline and Service
Manual for Residential Split-System Air Conditioners and Heat
Pumps using Puron® Refrigerant to minimize losses. Refer to
Table 1 for field tubing diameters. Refer to Table 2 for accessory
requirements.
Refrigerant tubes and indoor coil must be evacuated to 500
microns to minimize 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 indoor coils which are not factory
approved to these units.
INSTALL ADAPTER TUBE
1. Remove plastic retainer holding outdoor piston in liquid
service valve.
2. Check outdoor piston size with matching number listed on unit
rating plate.
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. (See Fig. 7.)
5. Remove adapter tube from bag and connect threaded nut to
liquid service valve. Tighten nut finger tight and then with
Table 1—Refrigerant Connections and Recommended Liquid Line and Vapor Tube Diameters (In.)
UNIT
SIZE
CONNECTION DIAMETER TUBE DIAMETER
TUBE DIAMETER
(ALTERNATE)
RST TUBE
DIAMETERS
NOT PERMITTED
Liquid Vapor Liquid Vapor Vapor Vapor
018, 024 3/8 5/8 3/8 5/8 3/4 ACR 3/4
030 3/8 3/4 3/8 3/4 7/8 1-1/8
036 3/8 3/4 3/8 3/4 7/8 1-1/8
042, 048 3/8 7/8 3/8 7/8 7/8 3/4 and 1-1/8
060 3/8 1-1/8 3/8 1-1/8 7/8 3/4
NOTES:
1. Tube diameters are for lengths up to 50 ft. For tubing lengths greater than 50 ft, consult the Application Guideline and Service Manual — Residential Split-System
Air Conditioners and Heat Pumps Using Puron® Refrigerant.
2. Refrigerant tubes and indoor coils must be evacuated to 500 microns to minimize contamination and moisture in the system.
Fig. 7—Liquid Service Valve with Sweat Adapter
Tube
A99441
SWEAT/FLARE
ADAPTER
TEFLON
SEAL
PISTON BODY
LIQUID SERVICE VALVE
PISTON
Fig. 8—Filter Drier with Sweat Adapter Tube and
Liquid Tube
A00431
LIQUID
SERVICE
VALVE
LIQUID-LINE
FILTER-DRIER
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