Figure 2-3. Controls, indicators, and connectors
a. Before connecting connector (20) to electrical source, make certain that circuit breaker 122) and switch /21) are
b Check vacuum pump oil level at glass disk (15). Oil level must be maintained within sight of glass disk. Oil level
will indicate higher while pump is running.
Table 2-1. Functions of Controls, Indicators, and Connections
EVAC 1 V1
To control vacuum at unions CP3 and CP4.
To control vacuum at vacuum pump.
Combination heater and thermocouple sensing
element to provide signal to gage M1.
Scale on beaker displays quantity of refrigeration oil
To control ventilation or evacuation of reservoir.
OIL VENT V6
To control vent for refrigeration oil in beaker.
Measures pressure contained in reservoir.