Ref Name
(4) Cooling air inlet
(5) Cooling Full-Feature air outlet
(6) Cooling Full-Feature air inlet
Description
Ref Description
1 Install the compressor on a level floor suitable for taking the weight of the compressor.
Recommended minimum distance between the top of the bodywork and the ceiling: 1200
mm (46.80 in).
2 Remove the plastic plug or cap (if provided) from the compressor air outlet pipe and install
an air outlet valve. Close the valve and connect it to the air net.
3 The pressure drop over the delivery pipe can be calculated as follows:
dp = (L x 450 x Qc
1.85
) / (d
5
x P)
•
dp = pressure drop (recommended maximum = 0.1 bar)
•
L = length of outlet pipe in m
•
d = inner diameter of the delivery pipe in mm
•
P = absolute pressure at the compressor outlet in bar(a)
•
Qc = free air delivery of the compressor in l/s
The connection of the compressor air delivery pipe should be made on top of the main air
net pipe to minimize carry-over of possible remainder of condensate.
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 air velocity to the grids should be limited to 5 m/s (195 in/s).
The required ventilation capacity (per compressor installed) to limit the compressor room
temperature can be calculated as follows:
On ZR compressors: Qv = 0.1 N / dT
On ZT compressors: Qv = 0.92 N/ dT
•
Qv = required ventilation capacity in m
3
/s
•
N = shaft input of the compressor in kW
•
dT = temperature rise over ambient in ˚C
If cooling air ducts are installed, the maximum allowable pressure drop over the ducts is
30 Pa. Common ducting for several compressors is not allowed.
5 Lay out the drain piping from automatic condensate outlets (EWD) towards the condensate
collector. The drain pipes must not dip into the water of the collector. It is recommended
to provide a funnel to allow visual inspection of the condensate flow.
6 Elektronikon control system with control panel.
7 See Electric cables for the recommended cable 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.
8 Provide a condensate drain valve in the lowest part of the pipe between the compressor
outlet valve and the air net.
9 Remove the plastic plugs (if provided) from the compressor water pipes and connect the
pipes to the cooling water circuit. Provide a valve in the compressor water inlet pipe and
outlet pipe.
Instruction book
84
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