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Operation
•Pressure Switch - Auto/Off Switch
(Figure7) - In the AUTO position, the
compressor shuts off automatically when
tank pressure reaches the maximum
preset pressure. In the OFF position, the
compressor will not operate. This switch
should be in the OFF position when
connecting or disconnecting the power
cord from the electrical outlet or when
changing air tools.
• Regulator - The regulator controls
the amount of air pressure released
at the hose outlet.
• ASME Safety Valve - This valve
automatically releases air if the tank
pressure exceeds the preset maximum.
• Exhaust Tube - This tube carries
compressed air from the pump to the
check valve. This tube becomes very
hot during use. To avoid the risk of
severe burns, never touch the
exhaust tube.
• Check Valve - A one-way valve that
allows air to enter the tank, but
prevents air in the tank from flowing
back into the compressor pump.
• Handle - Designed to move the
compressor.
Never use the
handle on wheeled
units to lift the unit completely off the
ground.
• Drain Valve - This valve is located
on the bottom of the tank. Use this
valve to drain moisture from the tank
daily to reduce the risk of corrosion.
Reduce tank pressure below 10 psi,
then drain moisture from tank daily to
avoid tank corrosion. Drain moisture
from tank by opening the drain valve
located underneath the tank.
BEFORE FIRST START-UP
BREAK-IN PROCEDURE
(Complete this procedure before using
compressor for the first time. Once
completed, it is not necessary to repeat.)
1. Turn regulator knob fully clockwise
(to the right) to open air flow.
2. Turn on/off switch to OFF position.
3. Plug in power cord.
4. Turn on/off switch to AUTO position
and run compressor for 30 minutes.
5. Turn on/off switch to OFF position.
6. Unplug power cord.
The compressor is now ready for use.
BEFORE EACH START-UP
OPERATING PROCEDURE
1. Turn regulator knob fully counter
clockwise (to the left) to close air
flow.
2. Connect air hose to outlet of
regulator.
3. Turn on/off switch to OFF position.
4. Plug in power cord.
5. Turn on/off switch to AUTO position
and let compressor run until it
reaches automatic shutoff pressure.
6. Attach tire chuck or tool to end of
hose.
7. Turn regulator knob clockwise (to
the right) to desired pressure of tool
being used.
On/Off cycling of compressor
In the AUTO position, the compressor
pumps air into the tank. When a shut-
off (preset “cut-out”) pressure is
reached, the compressor automatically
shuts off.
If the compressor is left in the AUTO
position and air is depleted from the
tank by use of a tire chuck, tool, etc., the
compressor will restart automatically at
its preset “cut-in” pressure. When a tool
is being used continuously, the
compressor will cycle on and off
automatically.
In the OFF position, the pressure switch
cannot function and the compressor
will not operate. Make sure switch is in
OFF position when connecting or
disconnecting power cord from
electrical outlet.
ASME SAFETY VALVE
Do not remove or
attempt to adjust
the safety valve!
Check the safety valve by performing
the following steps:
1. Plug the compressor in and run until
shut off pressure is reached (see
Operating Procedure).
2. Wearing safety glasses, pull the ring
on the safety valve (see Figures 6 and
8) to release pressure from
compressor tank. Use your other
hand to deflect fast-moving air from
being directed toward your face.
MOISTURE IN COMPRESSED AIR
Moisture in compressed air will form into droplets as it comes from an air
compressor pump. When humidity is high or when a compressor is in
continuous use for an extended period of time, this moisture will collect in
the tank. When using a paint spray or sandblast gun, this water will be
carried from the tank through the hose, and out of the gun as droplets
mixed with the spray material.
IMPORTANT: This condensation will cause water spots in a paint job,
especially when spraying other than water based paints. If sandblasting, it
will cause the sand to cake and clog the gun, rendering it ineffective. A filter
in the air line (MP3105), located as near to the gun as possible, will help
eliminate this moisture.
Oil-Lubricated Compressors
www.chpower.com
AUTO
OFF
Figure 7 - Auto/Off switch
Figure 8