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
III.CONDENSER-FAN ADJUSTMENT (Fig. 38)
1.Shut off unit power supply.
2.Remove
3.Loosen fan hub setscrews.
4.Adjust fan height as shown in Fig. 38.
5.Tighten setscrews.
6.Replace
UNIT 581B | FAN HEIGHT | |
(in.) | ||
| ||
| ||
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
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
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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