INSTALLATION INSTRUCTIONS
R
−
410A Split System Heat Pumps
4
428 01 1703 01
Specifications subject to change without notice.
Table 1
−
Accessory Usage
Accessory
REQUIRED FOR LOW
AMBIENT COOLING APPLICATIONS
(16 SEER Product Only)
(Below 55
°
F / 12.8
°
C)
REQUIRED FOR LONG LINE
APPLICATIONS*
REQUIRED FOR SEA COAST
APPLICATIONS (Withing 2
miles/3.22km)
Compressor Start Assist
Capacitor and Relay
NO
No
No
Crankcase Heater
Yes, Standard
Yes, Standard
No
Liquid Line Solenoid Valve
No
See Long Line Applications
Guideline
No
Support Feet
Recommended
No
Recommended
Hard Shutoff TXV
Yes (Standard with factory
approved indoor unit)
Yes (Standard with factory
approved indoor unit)
Yes (Standard with factory
approved indoor unit)
Evaporator Freeze Thermostat
Yes
No
No
Low-Ambient Pressure Switch
Yes
No
No
Isolation Relay
Yes
No
No
* For tubing line sets between 80 and 200 ft. (24.38 and 60.96 m) and/or 20 ft. (6.09 m) vertical differential, refer to Long Line Applications Guideline.
Table 2
−
Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (In.)
UNIT SIZE
LIQUID
RATED VAPOR
up to 80 ft. (24.38 m)*
Connection Diameter
Tube Diameter
Connection Diameter
Rated Tube Diameter
624, 924
3/8
3/8
3/4
3/4
636, 936
3/8
3/8
7/8
7/8
648, 948, 660, 960
3/8
3/8
7/8
1
−
1/8
* Units are rated with 25 ft. (7.6 m) of lineset. See Specification sheet for performance data when using different size and length linesets.
Notes
:
1. Do not apply capillary tube or fixed orifice indoor coils to these units.
2. For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 35 ft. (10.7 m) vertical differential 250 ft. (76.2 m) Total Equivalent Length),
refer to the Long Line Applications Guideline.
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal
injury, and/or property damage.
Never use air or gases containing
oxygen for leak testing or operating
refrigerant compressors. Pressurized
mixtures of air or gases containing
oxygen can lead to an explosion.
!
WARNING
