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Table 1 — Physical Data (cont)
BASE UNIT 50PG (cont) 03 04 05 06 07
EVAPORATOR FAN
Centrifugal Type, Belt Drive
Quantity…Size (in.) Low
1...12 x 9
1...12 x 9 1...12 x 9 1...12 x 9 1...12x 9
High
1...12 x 9
1...12 x 9 1...12 x 9 1...12 x 9 1...12x 9
Type Drive Low
Belt
Belt Belt Belt Belt
High
Belt
Belt Belt Belt Belt
Nominal Cfm
800 1200 1600 2000 2400
Maximum Continuous Bhp Low
0.85
0.85 0.85 0.85/2.40† 2.40
High
0.85
0.85 1.60/2.40† 1.60/2.40† 3.10
Motor Nominal Rpm
1620 1620 1620 1725 1725
Motor Frame Size Low
48Y
48Y 48Y 56Y 56Y
High
48Y
48Y 56Y 56Y 56Y
Fan Rpm Range Low
482-736
482-736 596-910 690-978 796-1128
High
656-1001
796-1128 828-1173 929-1261 1150-1438
Motor Bearing Type
Ball Ball Ball Ball Ball
Maximum Fan Rpm
2000 2000 2000 2000 2000
Motor Pulley Pitch Diameter Range (in.) Low
1.9-2.9
1.9-2.9 1.9-2.9 2.4-3.4 2.4-3.4
High
1.9-2.9
2.4-3.4 2.4-3.4 2.8-3.8 4.0-5.0
Fan Pulley Pitch Diameter (in.) Low
6.8
6.8 5.5 6.0 5.2
High
5.0
5.2 5.0 5.2 6.0
Nominal Motor Shaft Diameter (in.) Low
1
/
2
1
/
2
1
/
2
5
/
8
5
/
8
High
1
/
2
1
/
2
5
/
8
5
/
8
7
/
8
Belt...PitchLength(in.)
Low
49.3 49.3 49.3 49.3 49.3
High
49.3
49.3 49.3 49.3 52.3
Belt…Type Low
AX
AX AX AX AX
High
AX
AX AX AX AX
Pulley Center Line Distance Min. (in.) Low
16.2
16.2 16.2 16.2 16.2
High
16.2
16.2 16.2 16.2 16.2
Pulley Center Line Distance Max. (in.) Low
20.2
20.2 20.2 20.2 20.2
High
20.2
20.2 20.2 20.2 20.2
Speed Change per F ull Turn of
Movable Pulley Flange (rpm)
Low
48
48 59 58 66
High
65
62 69 66 58
Movable Pulley Maximum Full
Turns from Closed Position
Low
5
5 5 5 5
High
5
5 5 5 5
FactoryPulleySetting(rpm) Low
482
482 596 690 796
High
656
796 828 929 1150
Fan Shaft Diameter at Pulley (in.)
3
/
4
3
/
4
3
/
4
3
/
4
3
/
4
HIGH-PRESSURE SWITCH (psig)
Cutout
660 ± 10 660 ± 10 660 ± 10 660 ± 10 660 ± 10
Reset (Auto.)
505 ± 20 505 ± 20 505 ± 20 505 ± 20 505 ± 20
RETURN-AIR FILTERS
Throwaway
Quantity…Size (in.)
4…16 x 20 x 2 4…16 x 20 x 2 4…16 x 20 x 2 4…16 x 20 x 2 4…16 x 20 x 2
LEGEND
TXV --- Thermostatic Expansion Valve
* Aluminum evaporator coil/aluminum condenser coil.
{ Single phase/three phase.
50PG03--07