TM 5-4130-234-13&P
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
OFF.
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
Panel Marking
Index No.
and/or Reference
Control, Indicator
Function
Designation
or Connection
To control vacuum at unions CP3 and CP4.
Valve
EVAC 1 V1
1
To control vacuum at vacuum pump.
Valve
EVAC2 V2
2
Combination heater and thermocouple sensing
Thermistor
MT1
3
element to provide signal to gage M1.
Scale on beaker displays quantity of refrigeration oil
Beaker
SG2
4
To control ventilation or evacuation of reservoir.
Valve
VENT/EVAC V3
5
To control vent for refrigeration oil in beaker.
Valve
OIL VENT V6
6
Measures pressure contained in reservoir.
Gage
GA3
7
2-5
