Bryant 552A, 556A Accessory Usage, VII. Make Piping Connections, Install LIQUID-LINE Filter Drier

→TABLE 1—REFRIGERANT CONNECTIONS AND RECOMMENDED LIQUID AND VAPOR TUBE DIAMETERS (IN.)

UNIT SIZE	LIQUID		VAPOR		VAPOR (LONG LINE)
	Connection Diameter	Tube Diameter	Connection Diameter	Tube Diameter	Connection Diameter	Tube Diameter
018, 024	3/8	3/8	5/8	5/8	5/8	3/4
030, 036	3/8	3/8	3/4	3/4	3/4	7/8
042, 048	3/8	3/8	7/8	7/8	7/8	1-1/8
060	3/8	3/8	7/8	1-1/8	7/8	1-1/8

NOTES:

1.Tube diameters are for lengths up to 50 ft. For tubing lengths greater than 50 ft, consult the Application Guideline and Service Manual— Air Conditioners and Heat Pumps Using Puron® .

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

→		TABLE 2—ACCESSORY USAGE
		REQUIRED FOR	REQUIRED FOR	REQUIRED FOR
	ACCESSORY	LOW-AMBIENT	LONG-LINE	SEA COAST
		APPLICATIONS	APPLICATIONS*	APPLICATIONS
		(BELOW 55°F)	(OVER 50 FT)	(WITHIN 2 MILES)
	Crankcase Heater	Yes	Yes	No
	Evaporator Freeze Thermostat	Yes	No	No
	Winter Start Control	Yes†	No	No
	Accumulator	No	No	No
	Compressor Start Assist	Yes	Yes	No
	Capacitor and Relay
	MotorMaster® Control,
	or	Yes	No	No
	Low-Ambient Pressure Switch
	Wind Baffle	See Low-Ambient Instructions	No	No
	Coastal Filter	No	No	Yes
	Support Feet	Recommended	No	Recommended
	Liquid-Line Solenoid Valve
	or	No	See Long-Line Application Guideline	No
	Hard Shutoff TXV
	Ball Bearing Fan Motor	Yes‡	No	No

*For Tubing Sets between 50 and 175 ft, refer to the Application Guideline and Service Manual— Air Conditioners and Heat Pumps Using Puron® .

† Only when low-pressure switch is used.

‡ Required for low-ambient controller (full modulation feature) and MotorMaster® Control only.

VII. MAKE PIPING CONNECTIONS

WARNING: Relieve pressure and recover all refrigerant before system repair or final unit disposal to avoid personal injury or death. Use all service ports and open all flow-control devices, including solenoid valves.

CAUTION: 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.

CAUTION: 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 over 36 in. in length.

CAUTION: To prevent damage to unit or service valves observe the following:

• Use a brazing shield.

•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 50 ft, substan- tial capacity and performance losses can occur. Following the recommendations in the Application Guideline and Service Manual—Air Conditioners and Heat Pumps Using Puron® Refrig- erant will reduce these losses. Refer to Table 1 for field tubing diameters. Refer to Table 2 for accessory requirements.

→ There are no buried-line applications greater than 36 in.

If refrigerant tubes or indoor coil are exposed to atmosphere, they must be evacuated to 500 microns to eliminate contamination and moisture in the system.

A. OUTDOOR UNIT CONNECTED TO FACTORY- APPROVED INDOOR UNIT

Factory refrigerant charge is for a 15 ft line set. Outdoor unit contains correct system refrigerant charge for operation with ARI rated indoor unit. Check refrigerant charge for maximum effi- ciency. The charge must be adjusted based on the actual line set length. Add or subtract 0.6 oz/ft for line sets longer or shorter than 15 ft.

B. INSTALL LIQUID-LINE FILTER DRIER

CAUTION: Installation of filter drier in liquid line is required.

Refer to Fig. 6 and install filter drier as follows:

1.Braze 5-in. connector tube to liquid service valve. Wrap filter drier with damp cloth.

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