Bryant 123A Install Liquid-Line Filter Drier Indoor, Evacuate Refrigerant Tubing and Indoor Coil

Use refrigeration 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.

Table 1 – Refrigerant Connections and Recommended Liquid

and Vapor Tube Diameters (In.)

	LIQUID	RATED VAPOR
		up to 80 ft. (24.38 m)*
UNIT SIZE (SERIES)	Connection	Connection	Tube
	& Tube
		Diameter	Diameter
	Diameter
018, 024	3/8	5/8	5/8
030, 036	3/8	3/4	3/4
042, 048	3/8	7/8	7/8
060 (all series)	3/8	7/8	1---1/8

Notes:

1.Tube diameters are for total equivalent lengths up to 80 ft. (24.38 m)

2.Do not apply capillary tube or fixed orifice indoor coils to these units.

*For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 20 ft. (6.10 m) vertical differential (250 ft. (76.2 m)Total Equivalent Length), refer to the Longline Guideline --- Air Conditioners and Heat Pumps using Puronr Refrigerant.

Install Liquid-Line Filter Drier Indoor

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

1.Installation of filter drier in liquid line is required.

2.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. 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.

A05178

Fig. 3 - Liquid Line Filter Drier

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 triple evacuation procedure in service manual). 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. A tight dry system will hold a vacuum of 1000 microns after approximately 7 minutes. See Fig. 4.

5000
4500
4000						LEAK IN
3500
						SYSTEM
3000
2500
MICRONS2000						VACUUM TIGHT
1500
						TOO WET
1000
						TIGHT
500
						DRY SYSTEM
0	1	2	3	4	5	6	7
			MINUTES
							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 or wires. Pay close attention to feeder tubes, making sure wire ties on feeder tubes are secure and tight.

123A / 124A

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