Chicago Pneumatic CPF 270, Instruction Book

Page: 68 / 122

Phase Description
4 The inlet grids and ventilation fan should be installed in such a way that any recirculation
of cooling air to the compressor is avoided. The maximum air velocity through the grids is
5 m/s (16.5 ft/s).
The required ventilation to limit the compressor room temperature can be calculated as
follows:
On air-cooled compressors: Qv = 0.92 N/dT
On water-cooled compressors: Qv = 0.1 N/dT
Qv = Required ventilation capacity in m
3
/s
N = Shaft input of compressor in kW
dT = Temperature increase in compressor room
If cooling air ducts are installed, the maximum allowable pressure drop over the ducts is
30 Pa (0.12 in wc). The maximum pressure drop depends on the ambient temperature.
The fan capacity should match the compressor fan capacity at a pressure head equal to
the pressure drop caused by the cooling air outlet ducts. Consult your service
representative.
5 A water shut-off valve and water drain valve in the compressor water inlet pipe and outlet
pipe can be installed by the customer. If water shut-off valves are installed, a safety device
with set pressure according to the maximum cooling water inlet pressure has to be installed
between the compressor water outlet pipe and the shut-off valve. When operating the unit,
the operator must ensure that the cooling water system cannot be blocked.
The above mentioned also applies for the energy recovery cooling system.
Remove the plastic plugs (if provided) from the compressor water pipes and connect the
pipes to the cooling water circuit.
6 Remove the plastic plugs (if provided) from the condensate outlets and fit the manual
condensate drain valve. Lay out the drain piping towards the condensate collector. The
drain pipes must not dip into the water of the drain collector. It is recommended to provide
a funnel to allow visual inspection of the condensate flow.
7 Location of the electronic regulator.
8 See section Electric cable size for the recommended size of the supply cables. Check that
the electrical connections correspond to the local codes. The installation must be earthed
and protected against short circuits by fuses in all phases. An isolating switch must be
installed near the compressor.
Instruction book
66 2920 1796 01