Chapter 3 - Commissioning; A - Preparation For Start-Up; B - First Start-Up; C -Discharge Pressure Adjustment - Chicago Pneumatic CPF 175 Instruction Manual

Chapter 3 - Commissioning

A - Preparation for start-up

Before starting the set for the first time, the operator must get to
know the different systems. The main locations which have to be
examined are shown on the figures.
IMPORTANT
Before start up, make sure that transport red wedges have been
effectively removed.
ATTENTION
The power circuit must be turned off whenever adjusting electrical
equipment or to prevent accidental starting.
Loosening of electrical power cables that may be due to vibra-
tions caused by transport or initial heating entails abnormal heating
of contactors, which may even destroy them. Therefore, these
cables must be re-tightened at line contactor incoming and
outgoing, star delta before use.
Before start-up, check the following points :
1 - Make sure that the unit is properly earthed.
2 - Check the oil level in the tank.
NOTE : the tank has been filled with suitable oil in the
factory. See Chapter 7 - A for the quality of oil to be used
or for oil renewal conditions.
3 - Make sure the oil change valve is properly closed.
ATTENTION
The oil filler cap, the oil change valve and plugs must always
remain closed during operation and never be opened before the
system has been completely vented to atmospheric pressure ( see
Chapter 7 - A).

B - First start-up

Check the voltage between the three phases before using the unit
for the first time.
1
Fig. 9
Chicago Pneumatic Compressors
62 305 799 65
Check the direction of rotation (following the arrow on the
coupling housing rep. 1-Fig. 9) by pressing the "Start" button,
followed immediately by the emergency stop. If it does not spin
in the right direction reverse two stages of the power cord. When
it rotates in the correct direction, the oil level (Fig.21) should
drop after 4 or 5 seconds of operation.
It is also very important to verify the direction of rotation of the
fan (indicated on it by an arrow) anti-clockwise seen from inside
the machine or clockwise seen from outside the machine.
1 - Press the ON button, the motor starts up.
2 - Keep it running for a few minutes with the discharge valve
slightly open to observe the compressor under load. Ensure
that there are no leaks. Reblock the connectors if necessary.
3 - Press the OFF button. The motor will stop and the unit will
automatically vent to atmospheric pressure.

C -Discharge pressure adjustment

The unit is adjusted in the factory for a MAXIMUM pressure (for
the maximum output from the outlet of the central unit) of 100,
125, 150 or 175 PSI depending on the model. To adjust the
backflow pressure setting to a lower value, refer to the manual of
the electronic controler.

D - Parallel compressor assembly

If the CP Compressors is intended to operate in parallel with other
CP or similar compressors, the discharge piping can be linked
together.
If the CP Compressors is intended to operate in parallel with other
CP or similar compressors, there must be an air tank common to all
the alternative compressors. The pulses emitted by alternative
compressors may cause serious damage to the minimum pressure
valve and the CP Compressors oil separator, and disrupt the
regulation system. When the rotary compressor is operating in
parallel with an alternative compressor, the latter should be adjusted
so that the rotary compressor takes the main load. It is cheaper to
run this way.

E - Safety

The oil used for cooling the machine is a liquid combustible under
the effect of strong heat. In case of fire in the machine, it is essential
to respect the regulatory measures on the compressor. The type of
fire in a compressor is defined as "class B" and in presence of a live
electrical conductor, it is recommended to use a CO2 extinguisher
functioning by "smothering" (starvation of oxygen) while observing
the user instructions applicable to the model.
11/2008
Page 11