Industrial Air Contractor C042I, Operator'S & Parts Manual

 9 

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Pre-Operation (continued)

Part

Description

A

AUTO/OFF Switch: 

Turn this switch in the “AUTO ( I )” position to provide automatic power to the 

pressure switch and “OFF ( O )” to remove power at the end of each use.

B

Safety Valve: (not shown) 

If the pressure switch does not shut off the air compressor at its “cut-out” 

pressure setting, the safety valve will protect against high pressure by “popping out” at its factory set 
pressure (slightly higher than the pressure switch “cut-out” setting).

C

Tank Pressure Gauge: 

 The tank pressure gauge indicates the reserve air pressure in the tank. 

D

Air Compressor Pump: 

 Compresses air into the air tank. Working air is not available until the 

compressor has raised the air tank pressure above that required at the air outlet.

E

Drain Valve

: The drain valve is located at the base of the air tank and is used to drain condensation at 

the end of each use.

F

Check Valve: 

 When the air compressor is operating, the check valve is “open”, allowing compressed 

air to enter the air tank.  When the air compressor reaches “cut-out” pressure, the check valve “closes”, 
allowing air pressure to remain inside the air tank.

G

Thermal Overload Reset: (not shown)  This motor has an automatic thermal overload protector

. If 

the motor overheats for any reason, the overload protector will shut off the motor.  The motor must be 
allowed to cool down before restarting.  To restart:

1.  Place the AUTO/OFF switch in the “OFF” ( O ) position and unplug the machine from its power source.
2.  Allow the motor to cool.

3.  Place the AUTO/OFF switch in the “AUTO” ( I ) position to restart the motor.

H

Regulator: 

Allows the user to adjust the pressure coming out of the tank to match what is needed for the 

task.

I

Pressure Regulator Gauge:

 Gauge that indicates the amount of pressure that the regulator is providing 

to the tool.

J

Quick Connect: 

Fitting that is designed to accept a hose that allows pressure to be released for tool 

usage.

SYSTEM COMPONENTS

E

D

F

H

J

A

C

I