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STEP 6 —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.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
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.
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. vertical
rise at service valve. Refrigerant tubing lengths up to 36 in.
may be buried without further special consideration. Do
not bury lines longer than 36 in.
Table 1—Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (In.)
UNIT SIZE
018, 024
030, 036
042, 048
060
Notes:
1. Tube diameters are for total equivalent lengths up to 80 ft..
2. Do not apply capillary tube or fixed orifice indoor coils to these units.
* For Tubing Set lengths between 80 and 200 ft. horizontal or 20 ft. vertical differential (250 ft. Total Equivalent Length), refer to the Longline Guideline --- Air
Conditioners and Heat Pumps using Puron refrigerant.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
To prevent damage to unit or service valves observe the
following:
S Use a brazing shield.
S 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. Rated tubing diameters
shown in Table 1 recommended up to 80 ft. See Product Data
for acceptable alternates vapor diameters and associated capacity
losses. For tubing requirements beyond 80 ft., substantial
capacity and performance losses can occur. Following the
recommendations in the Longline Guideline - - Residential
Split- -System Air Conditioners and Heat Pumps Using Puronr
Refrigerant will reduce these losses. Refer to Table 1 for field
tubing diameters. Refer to Table 2 for accessory requirements.
There are no buried- -line applications greater than 36 in.
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 correct system refrigerant charge for
operation with factory approved ARI rated indoor unit when
connected by 15 ft. of field- -supplied or factory- -accessory tubing,
and factory supplied filter drier. Check refrigerant charge for
maximum efficiency.
LIQUID
Connection
Tube
Diameter
Diameter
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
5
CAUTION
!
VAPOR
(up to 80 ft. *)
Connection
Diameter
5/8
3/4
7/8
7/8
Rated Tube
Diameter
5/8
3/4
7/8
1- - 1/8
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