Table 2 - Setting Safety Controls (Contd)
SAFETY OR CONTROL DEVICE RECOMMENDED SETTING
2. Refrigerant Low-Temperature
Cutout (Fig. 1)
1. Install jumper wire or mechanical block in the chilled
water low-temperature cutout and recycle control.
2. Set the refrigerant low-temperature cutout at 33 F while
reading the temperature gage on side of float chamber.
3. Remove jumper wire or block.
3. Oil Heater Thermostat (Fig. 1)
Set the oil heater thermostat to maintain a minimum oil
reservoir temperature of 145 F at shutdown.
4. Condenser High-Pressure
Cutout (Fig. 1)
CUTOUT ADJUSTMENT .-••c '
COVER-
The condenser high-pressure cutout switch is factory set
to shut the machine down when the condenser pressure
reaches approximately fifteen psig. Isolate the switch, and
check switch setting with a metered supply of air.
RESET
„
......
..........
.
, BUTTON
CUTOUT SCALE
5. Low Oil Pressure Cutout (Fig. 1)
RANGE (CUT-IN) .
DIAL ADJUSTMENT
REMOVE METAL
COVER
------
CUTOUT
ADJUSTMENT
Opens switch contacts on drop in oil pressure. Cutout at
9 psi differential. Cut-in at 14 psi differential. While op
erating pump manually, note and record reservoir pres
sure on gage. Remove cap and gasket from oil pressure
regulating valve. Loosen locknut. Turn adjusting screw
counterclockwise to lower oil pressure to within 4 psi of
reservoir pressure. Reset differential to adjust cutout. Set
range (cut-in) by turning adjusting dial clockwise, raising
oil pressure.
6. Antirecycle Timer (Fig. 1)
/TIME SETTING
'LOCKNUT
' N
TIMER
SWITCHES
Time setting is factory set for 20 minutes. Limits the num
ber of machine starts to three per hour.
