Table 1 — Physical Data
BASE UNIT 50GJ 006 008 012
NOMINAL CAPACITY (tons) 57
1
⁄
2
10
OPERATING WEIGHT (lb)
Unit 465 755 915
With Varislide™ Economizer 499 799 959
With PARABLADE Economizer 507 817 977
Roof Curb
115 143 143
COMPRESSOR Scroll
Quantity 122
Oil (oz) (each compressor)
50 57 57
REFRIGERANT TYPE R-407C
Operating Charge (lb-oz)
Circuit 1 9-12 7- 6 9-1
Circuit 2
— 6-15 10-2
CONDENSER FAN Propeller Type
Qty...Diameter (in.) 1...22 2...22 2...22
Nominal Cfm 4000 6500 7000
Motor Hp...Rpm
1
⁄
4
...1100
1
⁄
4
...1100
1
⁄
4
...1100
Watts Input (Total)
400 650 650
CONDENSER COIL High Efficiency Enhanced Copper Tubes, Lanced Aluminum Fin
Rows...Fins/in. 2...17 2...17 2...17
Total Face Area (sq ft)
16.53 20.5 25.0
EVAPORATOR FAN Centrifugal Type, Belt Drive
Qty...Size (in.) 1...10 x 10 1...15 x 15 1...15 x 15
Nominal Cfm 2000 3000 4000
Maximum Continuous Bhp 1.80 2.90 4.20
Motor Frame 56 56 56
Fan Rpm Range 1020-1460 840-1085 860-1080
Motor Bearing Type Ball Ball Ball
Maximum Fan Rpm 2100 2100 2100
Motor Pulley Pitch Diameter A/B (in.) 2.4/3.4 3.4/4.4 4.0/5.0
Nominal Motor Shaft Diameter (in.)
7
⁄
8
7
⁄
8
7
⁄
8
Fan Pulley Pitch Diameter (in.) 4.0 7.0 8.0
Belt — Qty...Type...Length (in.) 1...A...40 1...A...51 1...A...51
Pulley Center Line Distance (in.) 14.7-15.5 16.75-19.25 15.85/17.50
Speed Change per Full Turn of
75 50 45
Movable Pulley Flange (rpm)
Movable Pulley Maximum Full Turns
655
From Closed Position
Factory Setting — Full Turns Open 355
Factory Speed Setting (rpm) 1240 840 860
Fan Shaft Diameter at Pulley (in.)
5
⁄
8
11
EVAPORATOR COIL
High Efficiency Enhanced Copper Tubes, Aluminum Double-Wavy Fins,
Acutrol™ Feed Device
Rows...Fins/in. 4...15 3...15 4...15
Total Face Area (sq ft) 5.5 8.9 11.1
HIGH-PRESSURE SWITCH (Internal) (psig) 450 6 5
Cutout (Discharge Line) 428
Reset (Auto.) 320
LOSS-OF-CHARGE/LOW-PRESSURE SWITCH
(Liquid Line) (psig)
Cutout 7 6 3
Reset (Auto.) 22 6 7
FREEZE-PROTECTION THERMOSTAT
Opens (F) 30 6 5
Closes (F) 45 6 5
OUTDOOR-AIR INLET SCREENS Cleanable Cleanable
Qty...Size (in.)
1...20 x 24 x 1
1...20 x 25 x 1
1...16 x 25 x 1
RETURN-AIR FILTERS Throwaway Throwaway
Qty...Size (in.) 2...16 x 25 x 2 4...16 x 20 x 2 4...20 x 20 x 2
LEGEND
Bhp — Brake Horsepower
6
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