Carrier 19DA - Manual (Page 6)

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.