Table 1a — Specifications (SI)
UNIT 548C 090 120
NOMINAL CAPACITY (kW) 23.1 28.7
OPERATING WEIGHT (Kg)
Unit 381 426
With Economizer 401 446
ROOF CURB WEIGHT (Kg)
350 mm Curb 52 52
600 mm Curb 67 67
COMPRESSOR Hermetic
Quantity 22
Oil (ml) (each compressor) 1627 2071
REFRIGERANT R-22
Operating Charge (Kg)
Circuit 1 3.7 4.0
Circuit 2 3.2 3.9
OUTDOOR FAN Propeller Type
Quantity...Diameter (mm) 1...660 1...660
Nominal L/s 2900 3260
Motor BkW...r/s .25...16.0 .25...16.0
OUTDOOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins
Rows...Fins/m 2...669 2...669
Total Face Area (sq m) 1.9 2.3
INDOOR FAN Centrifugal
Size (mm) 381 x 381 381 x 381
Type Drive Belt Belt
Nominal L/s 1200 1600
Motor kW 1.12 1.50
Motor Frame 56 56
Fan r/s Range 10.37-14.68 11.53-14.93
Maximum Fan r/s 35 26.7
Motor Pulley Pitch Diameter
61/86 86/112
Open/Closed (mm)
Fan Pulley Pitch Diameter (mm) 140 178
Belt — Type...Length (mm) A...1219 A...1295
Pulley Center Line Distance (mm) 425-489 464-527
Speed Change Per Full Turn of
.87 .68
Movable Pulley Flange (r/s)
Movable Pulley Maximum Full
55
Turns from Closed Position
Factory Setting — Full Turns Open 55
Factory Speed Setting (r/s) 10.37 11.53
Fan Shaft Diameter at Pulley (mm) 25 25
INDOOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins
Rows...Fins/m 3...381 3...381
Total Face Area (sq m) .74 .93
OUTDOOR-AIR INLET SCREENS Cleanable
Quantity...Size (mm) 1...508 x 635 x 25
1...406 x 635 x 25
RETURN-AIR FILTERS Disposable
Quantity...Size (mm) 4...406 x 508 x 50 4...508 x 508 x 50
LEGEND
BkW — Brake Kilowatt
—6—
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