Bryant 550A, 556A, 552A Dimensions, Check Equipment and JOB Site Unpack Unit, Inspect Equipment

NOTE: Avoid contact between tubing and structure

OUTDOOR WALL	INDOOR WALL
CAULK	LIQUID TUBE
	A
	C
	L

B

VAPOR TUBE

INSULATION

THROUGH THE WALL

	JOIST	3⁄8 IN. DIA TIEDOWN		8 3⁄16″
HANGER STRAP		KNOCKOUTS
		(2) PLACES
(AROUND VAPOR	INSULATION
		IN BASEPAN
TUBE ONLY)					A97375
	VAPOR TUBE		DIMENSIONS (IN.)
		→
			MINIMUM	TIEDOWN KNOCKOUT
		UNIT SIZE	MOUNTING PAD	LOCATIONS
			DIMENSIONS	A	B
		018	20 X 32	2-13/16	6-15/16
1″ MIN.		024–060	26 X 32	5-1/16	9-11/16
			Fig. 3—Clearance Requirements
	LIQUID TUBE

SUSPENSION

A94028

Fig. 2—Connecting Tubing Installation

can be no deviation. Consult the Application Guideline and Service Manual—Air Conditioners and Heat Pumps Using Pu- ron® Refrigerant to obtain required unit changes for specific applications and for R-22 retrofit.

I. CHECK EQUIPMENT AND JOB SITE

A. UNPACK UNIT

Move to final location. Remove carton taking care not to damage unit.

B. INSPECT EQUIPMENT

File claim with shipping company prior to installation if shipment is damaged or incomplete. Locate unit rating plate on unit corner panel. It contains information needed to properly install unit. Check rating plate to be sure unit matches job specifications.

II. INSTALL ON A SOLID, LEVEL MOUNTING PAD

If conditions or local codes require the unit be attached to pad, tie down bolts should be used and fastened through knockouts provided in unit base pan. Refer to unit mounting pattern in Fig. 3 to determine base pan size and knockout hole location.

On rooftop applications, mount on level platform or frame. Place unit above a load-bearing wall and isolate unit and tubing set from structure. Arrange supporting members to adequately support unit and minimize transmission of vibration to building. Consult local codes governing rooftop applications.

Roof mounted units exposed to winds above 5 mph may require wind baffles. Consult the Application Guideline and Service Manual—Air Conditioner with Puron® Refrigerant for wind baffle construction.

NOTE: Unit must be level to within ± 2 ° (± 3/8 in./ft) per compressor manufacturer specifications.

III. CLEARANCE REQUIREMENTS

When installing, allow sufficient space for airflow clearance, wiring, refrigerant piping, and service. Allow 30-in. clearance to service end of unit and 48 in. above unit. For proper airflow, a 6-in.

—2—

clearance on 1 side of unit and 12 in. on all remaining sides must be maintained. Maintain a distance of 24 in. between units. Position so water, snow, or ice from roof or eaves cannot fall directly on unit.

On rooftop applications, locate unit at least 6 in. above roof surface.

IV. OPERATING AMBIENTS

The minimum outdoor operating ambient in cooling mode is 55°F, and the maximum outdoor operating ambient in cooling mode is 125°F.

V.CHECK INDOOR CHECK-FLO-RATER® PISTON AND INSTALL PISTON RING (552A/550A STANDARD)

If unit is to be installed with a piston metering device, proceed as follows:

1.Check indoor coil piston to see if it matches the required piston shown on outdoor unit rating plate. If it does not match, replace indoor coil piston with piston shipped with outdoor unit. The piston shipped with outdoor unit is correct for any approved indoor coil combination.

2.After correct piston is installed, locate neoprene piston ring shipped in piston bag. Install piston ring behind metering piston as shown in Fig. 4. The piston ring ensures that piston stays seated during all operating conditions.

VI. INSTALL TXV (556A STANDARD; 552A/550A OP-

TIONAL)

NOTE: ALL 556A UNITS MUST BE INSTALLED WITH A TXV—NO EXCEPTIONS!

The thermostatic expansion valve is specifically designed to operate with Puron® . Do not use an R-22 TXV. An existing R-22 TXV must be replaced with a factory-approved TXV specifically designed for Puron® .

NOTE: FK4 and FC4 fan coils are equipped with an R-22 TXV. If an FK4 or an FC4 fan coil is used with a Puron® air conditioner, the R-22 TXV must be replaced with a Puron® TXV or with the accessory piston body kit and piston shipped with outdoor unit.

A. TXV INSTALLATION

IMPORTANT: The TXV should be mounted as close to the indoor coil as possible and in a vertical, upright position. Avoid mounting the inlet tube vertically down. Valve is more susceptible to malfunction due to debris if inlet tube is facing down. A factory-approved filter drier must be installed in the liquid line.