Porter-Cable CFBN125A, Instruction Manual

Outlet Pressure Gauge:

  The outlet 

pressure gauge indicates the air 
pressure available at the outlet side 
of the regulator. This pressure is 
controlled by the regulator and is 
always less than or equal to the tank 
pressure. 

Regulator:

 Controls the air 

pressure shown on the outlet 
pressure gauge. Turn regulator knob 
clockwise to increase pressure 
and counterclockwise to decrease 
pressure. 

Cooling System (not shown):

  This 

compressor contains an advanced 
design cooling system. At the heart of 
this cooling system is an engineered 
fan. It is perfectly normal for this fan 
to blow air through the vent holes 
in large amounts. You know that the 
cooling system is working when air is 
being expelled.

Air Compressor Pump (not shown):

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.

11 - ENG

A07300

Description of Operation

Become familiar with these controls 
before operating the unit.

On(I)/Off(O) Switch

: Place this switch 

in the ON (I) position to provide 
automatic power to the pressure 
switch and OFF (O) to remove power 
at the end of each use.

Pressure Switch (not shown):

 The 

pressure switch automatically starts 
the motor when the air tank pressure 
drops below the factory set "cut-in" 
pressure. It stops the motor when the 
air tank pressure reaches the factory 
set "cut-out" pressure.

Safety Valve:

 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).

Tank Pressure Gauge:

  The tank 

pressure gauge indicates the reserve 
air pressure in the tank. 

OPERATION

Know Your Air Compressor

READ THIS OWNER’S MANUAL AND SAFETY RULES BEFORE OPERATING 
YOUR UNIT. Compare the illustrations with your unit to familiarize yourself with 
the location of various controls and adjustments. Save this manual for future 
reference.

On(I)/Off(O) Switch

Safety Valve

Tank 
Pressure 
Gauge

Outlet 
Pressure 
Gauge

Regulator

Quick Connect