Bryant 581B II. Lubrication, IV. Economizer Adjustment, Refrigerant Charge

Fig. 35 Ð Cleaning Condenser Coil

Fig. 36 Ð Propping Up Top Panel

Fig. 37 Ð Separating Coil Sections

D. Filters

Clean or replace at start of each heating and cooling season, or more often if operating conditions require it. Replacement ®lters must be same dimensions as original ®lters.

E. Outdoor-Air Inlet Screens

Clean screens with steam or hot water and a mild detergent. Do not use disposable ®lters in place of screens.

II. LUBRICATION

A. Compressors

Each compressor is charged with the correct amount of oil at the factory.

B. Fan Motor Bearings

Fan motor bearings are of the permanently lubricated type. No further lubrication is required. No lubrication of condenser- or evaporator-fan motors is required.

III.CONDENSER-FAN ADJUSTMENT (Fig. 38)

1.Shut off unit power supply.

2.Remove condenser-fan assembly (grille, motor, motor cover, and fan).

3.Loosen fan hub setscrews.

4.Adjust fan height as shown in Fig. 38.

5.Tighten setscrews.

6.Replace condenser-fan assembly.

UNIT 581B	FAN HEIGHT
	(in.)
036-060 and,
072	2.75
(208/230 V)
072	3.50
(460 and 575 V)

Fig. 38 Ð Condenser Fan Adjustment

IV. ECONOMIZER ADJUSTMENT

Refer to Optional Economizer sections on pages 13 and 14.

V. REFRIGERANT CHARGE

Amount of refrigerant charge is listed on unit nameplate (also refer to Table 1). Refer to GTAC2-5 Charging, Recovery, Re- cycling, and Reclamation training manual and the following procedures. Unit panels must be in place when unit is oper- ating during charging procedure.

This unit uses a ®xed ori®ce refrigerant metering device located in the coil header. There is one ori®ce in each coil cir- cuit. The size of the ori®ce is stamped on the outside of the tube where the ori®ce is located. Ori®ces are factory selected for optimum performance and are not designed to be changed in the ®eld. To determine if an ori®ce has become plugged, disconnect power to the evaporator-fan motor and start the unit in cooling. Observe the coil for an uneven frost pattern, indicating a plugged ori®ce.

A. No Charge

Use standard evacuating techniques. After evacuating sys- tem, weigh in the speci®ed amount of refrigerant. (Refer to Table 1.)

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