Pfannenberg Rack Serie Libro De Instrucciones página 31

Step 8: Turn to the "ON" position Main Power Switch and Chiller Pump Circuit Breaker (all other Circuit Breakers should stay in
the "OFF" position).
Check correct rotation of the Chiller Pump Please note: there is an arrow located at the back part of the pump for direction
indication. Reverse two phases R-S-T on the terminal board in case of incorrect rotation.
CAUTION:
The pump must not flat running or in inverse direction; therefore the checking of the correct rotation
must be quick
Step 9:
Let Chiller Pump running for Minimum 20 minutes in order to allow the purging of all residual air within Hydraulic
Circuit.
Stop Chiller Pump and check Pre-Charge Pressure.
Refill if necessary.
Step 10:
Turn to the ON position all Circuit Breakers.
The Chiller Unit is now ready to operate
CAUTION
: Additional Air purge valves into external hydraulic circuit may be required should the Chiller be
installed on a low level (thus Air purge valve 3 not being at the highest point of the entire hydraulic system)
Please note
•
CLOSE LOOP Chillers are provided with a Safety Discharge Valve (component 2 within Picture 26 above) set at 4
bar (87 PSI) .
•
Max Operating Hydraulic Pressure value (PS) on Chiller type label has to be considered in addition to the pre-charge
pressure.
•
Regurarly check hydraulic system pre-charge pressure and refill if necessary.
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