AEROTECNICA COLTRI MCH 14 TECH NITROX SERIES, Instruction Manual

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This switch is automatic and starts the compressor at a low pressure and turns it off when it has
reached the maximum pressure level set.
It is pre-set to start and switch off the compressor at the correct pressure for the unit on which it is
installed. Do not change settings.
The belts must be tight in order to prevent slippage.
If the belts slip or creak, follow as for “ Verifying belt transmission” in paragraph 11.4
of this manual.
WARNING
If the belts are too tight the motor and its bearings will be overloaded and there is a risk of overheating or
seizure
If the compressor is unable to pump air or fills slowly, turn off the mains, remove the valve and clean
carefully using compressed air and a soft wire brush.
After cleaning, it is absolutely essential to check that all the parts have been reinstalled exactly in their
original position and that all the joints are tight otherwise the compressor will not function correctly.
When all the valves have been installed and the joints are tight, close the tank’s manual valve and vent
for the final check. The washers on the valves should be replaced every time the valves are removed from
the pump.
The centrifugal discharger is activated by two regulating weights. It is completely closed and lubricated
by the compressor guard. When the compressor is activated the regulating weights open automatically,
compressing the main spring, thus allowing the discharge pressure valve to close.
When the compressor stops, the main spring returns the regulating weights to their normal position,
opening the discharge pressure valves and emptying the compressor. This prevents the start motor
overloading. If air continues to come out of the regulating or discharge pressure valves in operation
phase, it means that the discharge pressure valves have not closed correctly and that they may have
remained open due to the presence of a foreign substance.
To solve this, the discharge regulation valve cover must be removed. Clean it carefully and reinstall the
parts in the order they were removed. The escape of air can also be caused by slow belts, that prevent
the compressor reaching the correct speed.
11.11.3
Pressure on/off
11.11.4
Belts
11.11.5 Compressor valves
11.11.6 C
entrifugal discharger and discharge pressure valve
Maintenance