Porter-Cable C7501 Instruction Manual page 12

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.
Check
Valve
Pressure Release Valve: The pressure release valve located on the side of the
pressure switch, is designed to automatically release compressed air from the
compressor head and the outlet tube when the air compressor reaches "cut-out"
pressure or is shut off. The pressure release valve allows the motor to restart freely.
When the motor stops running, air will be heard escaping from this valve for a few
seconds. No air should be heard leaking when the motor is running or after the
unit reaches "cut-out" pressure.
Motor Overload Protector: This motor has a manual thermal overload protec-
tor. 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 lever in the "Off" position.
2. Allow the motor to cool.
3. Depress the red reset button on the motor.
4. Place the Auto/Off lever in the "Auto" postion to restart the motor.
Air Intake Filter (not shown): This filter is designed to clean air coming into
the pump. This filter must always be clean and ventilation openings free from
obstructions. See Maintenance.
HOW TO USE YOUR UNIT
How to Stop:
Set the Auto/Off lever to "Off".
Before Starting
Do not operate this unit until you read this instruction manual
for safety, operation and maintenance instructions.
Break-in Procedure
Risk of property damage. Serious damage may result if the
following break-in instructions are not closely followed.
This procedure is required before the air compressor is put into service and when
the check valve or a complete compressor pump has been replaced.
1. Make sure the Auto/Off lever is in the "Off" position.
2. Check oil level in pump. See Oil paragraph in the Maintenance section for
instructions.
3. Recheck all wiring. Make sure wires are secure at all terminals connections.
Make sure all contacts move freely and are not obstructed.
4. Open the drain valve fully to permit air to escape and prevent air pressure build
up in the air tank during the break-in period.
5. Move the Auto/Off lever to "Auto" position. The compressor will start.
6. Run the compressor for 20 minutes. Make sure the drain valve and all air lines
are open so there is only a minimal air pressure build-up in tank.
12 - ENG
Reset
Button
Pressure
Release
Valve