5
Table 1 — Physical Data (cont)
BASE UNIT 50PG (cont)
16
EVAPORATOR FAN (cont)
Centrifugal Type, Belt Drive
Motor Pulley Pitch Diameter Min (in.)
Low
4.2
Mid-Low
4.2
High
5.2
Motor Pulley PItch Diameter Max (in.)
Low
5.2
Mid-Low
5.2
High
6.2
Fan Pulley Pitch Diameter
Low
10.2
Mid-Low
8.5
High
8.5
Nominal Motor Shaft Diameter (in.)
Low
7
/
8
Mid-Low
7
/
8
High
1
3
/
8
Belt
…
Pitch Length (in.)
Low
49.3
Mid-Low
47.8
High
43.8
Belt
…
Type
Low
AX
Mid-Low
BX
High
BX
Pulley Center Line Distance Min. (in.)
Low
14.2
Mid-Low
10.8
High
8.6
Pulley Center Line Distance Max. (in.)
Low
10.8
Mid-Low
14.2
High
12
Speed Change (rpm)
Low
34
Mid-Low
41
High
41
Movable Turns
Low
5
Mid-Low
5
High
5
Factory Pulley Setting (rpm)
Low
812
Mid-Low
983
High
1191
Fan Shaft Diameter at Pulley (in.)
1
3
/
16
HIGH-PRESSURE SWITCH (psig)
Cutout
660
±
10
Reset (Auto.)
505
±
20
RETURN-AIR FILTERS
Throwaway Type
Quantity
…
Size (in.)
8...20 x 20 x 2
LEGEND
TXV --- Thermostatic Expansion Valve
*Aluminum Evaporator/Aluminum Condenser coil fin material.
50PG16