Check the setting of the control transformer
DANGER
Electric shock
Life-threatening electric shock
➯
Work on the electrical equipment
must only be carried out by autho-
rised electricians or electrical techni-
cians.
➯
With the speed-controlled type-
s (
RS
) there is a risk of electric
shocks due to charged capacitors!
Switch the compressor voltage-free
and wait 10 minutes before touching
any electrical parts.
➯
Checking the DC bus voltage.
The control transformer is set to the rated volt-
age ex works.
Experience has shown that the actual supply
voltage may differ from the rated voltage.
To match the local circumstances, the cor-
rect setting of the control transformer must be
checked when the compressor is under load
by measuring the control voltages and if neces-
sary the transformer then reset.
A number of taps are provided for this purpose
(see circuit diagram).
NOTICE
Material damage
Incorrect setting of the control transformer en-
dangers trouble-free operation.
➯
Checking of the setting of the control trans-
former forms part of commissioning and pe-
riodic inspection/maintenance, as the mains
voltage conditions may vary.
5.4
Cooling water connection
1
2
[1]
Cooling water inlet
[2]
cooling water outlet
WARNING
Legionella contamination
Health risk with open cooling systems.
➯
Constant testing of the water quality
in the cooling circuit for the number
of microbes.
Connecting the compressor to the cooling
water mains
The compressor is completely assembled in the
factory. The connection to the cooling water mains
must be made with a flexible line, e.g. a com-
pressed air hose or expansion joint.
Only use correctly sized connectors.
1. Ensure that the lines can be connected free
from tension.
2. Connect the connecting line with the compres-
sor cooling water inlet and outlet.
3. Shut-off valves must be provided at the cooling
water inlet and outlet.
4. Secure the hose lines.
Cooling water inlet and cooling water outlet
•
European version: EN 10226-1 Rp 1 1/4
Permissible cooling water data
•
Cooling water pressure max.:
10 bar
•
Cooling water inlet temperature min.:
5 °C
