Install Liquid-Line Filter Drier Indoor
Refer to Fig. 3 and install filter drier as follows:
1.Braze
2.Wrap filter drier with damp cloth.
3.Braze filter drier to above
4.Connect and braze liquid refrigerant tube to the filter drier.
!CAUTION
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.
A05227
Fig. 3 - Liquid-Line Filter Drier
Refrigerant Tubing connection Outdoor
Connect vapor tube to fitting on outdoor unit vapor service valves (see Table 1).
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 TeflonR washer from bag and install on open end of liquid service valve.
5.Remove adapter tube from bag and connect threaded nut to liquid service valve. Tighten nut finger tight and then with wrench tighten an additional 1/2 turn (15
DO NOT OVER TIGHTEN!
Sweat Connections
!CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper operation.
SUse a brazing shield
SWrap service valves with wet cloth or heat sink material.
Use refrigerant grade tubing. Service valves are closed from factory and ready for brazing. After wrapping service valve with a wet cloth, braze sweat connections using industry accepted methods and materials. Consult local code requirements. Refrigerant tubing and indoor coil are now ready for leak testing. This check should include all field and factory joints.
Evacuate Refrigerant Tubing and Indoor Coil
!CAUTION
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. The alternate triple evacuation method may be used. See Service Manual for triple evacuation method. 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 gauge 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)
5000 |
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4500 |
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4000 |
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| LEAK IN | |
3500 |
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| SYSTEM | ||
3000 |
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2500 |
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MICRONS2000 |
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| VACUUM TIGHT | |
1500 |
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| TOO WET | ||
1000 |
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| TIGHT | ||
500 |
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| DRY SYSTEM | ||
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0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
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A95424
Fig. 4 - Deep Vacuum Graph
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
!WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Do not supply power to unit with compressor terminal box cover removed.
Be sure field wiring complies with local and national fire, safety, and electrical codes, and voltage to system is within limits shown on unit rating plate. Contact local power company for correction of improper voltage. See unit rating plate for recommended circuit protection device.
NOTE: Operation of unit on improper line voltage constitutes abuse and could affect unit reliability. See unit rating plate. Do not install unit in system where voltage may fluctuate above or below permissible limits.
NOTE: Use copper wire only between disconnect switch and unit.
286A / 288A
5