Installation guide
Table 2 - Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (In.)
RATED VAPOR
up to 80 ft. (24,38 m)*LIQUID
Connection and Tube Connection Rated Tube
UNIT SIZE Diameter Diameter Diameter
18, 24, 30, 3/8 3/4 3/4
36, 42, 48 3/8 7/8 7/8
60 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.
Install Liquid Line Filter Drier Indoor Evacuate Refrigerant Tubing and Indoor Coil
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Installation of filter drier in liquid line is required.
Filter drier must be wrapped in a heat-sinking material
such as a wet cloth while brazing.
Refer to Fig. 3 and install filter drier as follows:
1. Braze 5 in. (127 mm) liquid tube to the indoor coil.
2. Wrap filter drier with damp cloth.
3. Braze filter drier to above 5 in. (127 mm) liquid tube.
Flow arrow must point towards indoor coil.
4. Connect and braze liquid refrigerant tube to the filter
drier.
Figure 3 J Liquid Line Filter Drier
Refrigerant Tubing Connection Outdoor
Connect vapor tube to fitting on outdoor unit vapor service
valves (see Table 2.) Connect and braze the 3/8" coupling
(provided with the filter drier) to the liquid service valve and
connect and braze the liquid tubing to the other end of this
coupling. Use refrigerant grade tubing.
Sweat Connection
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Service valves must be wrapped in a heat-sinking
material such as a wet cloth.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Never use the system compressor as a vacuum pump.
Refrigerant tubes and indoor coil should be evacuated using
the recommended deep vacuum method of 500 microns. An
alternate triple evacuation method may be used. See triple
evacuation method in Service Manual.
IMPORTANT: Always break a vacuum with dry nitrogen.
Deep Vacuum Method
The deep vacuum method requires a vacuum pump capable
of pulling a vacuum of 500 microns and a vacuum gage
capable of accurately measuring this vacuum depth. The
deep vacuum method is the most positive way of assuring a
system is free of air and liquid water. (See Fig. 4)
Figure 4
Deep Vacuum Graph
IN
SYSTEM
VACUUM TIGHT
TOO WET
TIGHT
DRY SYSTEM
0 1 2 3 4 5 6 7
MINUTES
Final Tubing Check
IMPORTANT: Check to be certain factory tubing on both
indoor and outdoor unit has not shifted during shipment.
Ensure tubes are not rubbing against each other or any
sheet metal. Pay close attention to feeder tubes, making sure
wire ties on feeder tubes are secure and tight.
Make Electrical Connections
Service valves are closed from factory and ready for brazing. ELECTRICAL SHOCK HAZARD
After wrapping service valve with a wet cloth, braze sweat Failure to follow this warning could result in personal
connections using industry accepted methods and materials, injury or death.
Consult local code requirements. Refrigerant tubing and
Do not supply power to unit with compressor terminal box
indoor coil are now ready for leak testing. This check should
include atl field and factory joints, cover removed.
4 Specifications subject to change without notice. 421 01 5104 03