Step 8 Make Piping Connections - Carrier 25HNA Infinity
Series Installation Instructions Manual

Step 7 In Long−Line Applications, Install Liquid−Line
Solenoid Valve (LSV)
For refrigerant piping arrangements with equivalent lengths
greater than 80 ft. and/or when elevation difference between
indoor and outdoor unit is greater than ±20 ft., follow all
requirements of the Long−Line Guideline—Air Conditioners and
Heat Pumps Using PuronR
Long−Line Guideline, install LSV kit, part no. KHALS0401LLS,
specifically designed for PuronR refrigerant heat pumps. LSV
should be installed within 2 ft. of outdoor unit with flow arrow
pointing toward outdoor unit. Follow the Installation Instructions
included with accessory kit.
IMPORTANT: Flow arrow must point toward outdoor unit.
Step 8 Make Piping Connections
WARNING
!
PERSONAL INJURY AND UNIT DAMAGE
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.
Table 1—Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (In.)
UNIT SIZE
25HNA624
25HNA636
25HNA648
25HNA660
25HNA924
25HNA936
25HNA948
25HNA960
Notes:
1. Tube diameters are for total equivalent lengths (T.E.L.) up to 80 ft. Consult the Long Line Guideline Air Conditioners and Heat Pumps using Puron®
refrigerant.
2. Do not apply capillary tube or the fixed orifice indoor coils to these units.
3. T.E.L. − Total Equivalent Length
refrigerant. If required by
Information is Specific to 25HNA6 and 25HNA9 Models
LIQUID
Connection
Diameter
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
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.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
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. For tubing requirements
beyond 80 ft., substantial capacity and performance losses can
occur. Following the recommendations in the Application
Guideline and Service Manual−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.
Outdoor Unit Connected to Factory−Approved Indoor Unit
Outdoor unit contains correct system refrigerant charge for
operation with factory−approved, ARI−rated indoor unit with
highest sales volume when connected by 15 ft. of field−supplied
or factory−accessory tubing, and factory−supplied filter drier.
Check refrigerant charge for maximum efficiency.
Tube Connection
Diameter Diameter
3/8 5/8
3/8 3/4
3/8 7/8
3/8 7/8
3/8 3/4
3/8 3/4
3/8 7/8
3/8 7/8
5
RATED VAPOR
(up to 80 ft. T.E.L)
Tube
Diameter
5/8
3/4
7/8
1−1/8
3/4
3/4
7/8
1−1/8