35 - Installation and application -
8.4 COMMISSIONING
Check and record the pressures in the system.
If the pressure difference is smaller than expected, the pump may be rotating in the wrong
direction. The pump should rotate clockwise in the direction of the arrow indicated on the
pump housing.
Close the stop valve on the delivery side until the pressure difference has reached the max-
imum value as indicated in table 1 and set the flow switch accordingly.
If you hear unusual, or unfamiliar sounds from the pump, switch off the pump immediately
and investigate the cause.
The hand wheel (85) should always be turned fully open during operation!
When the pump operates normally, check after 2 hours, after 8 hours and later the pressure
difference and note the measured values.
After 1 to 2 weeks of trouble free operation you should inspect the conical filter for dirt
and contamination. Depending the degree of contamination the conical filter should be
regularly inspected and cleaned at planned intervals.
If the pump is fitted in an existing refrigeration system special attention has to be taken to drain
oil out of the the entire system within the first weeks.
If oil has collected in the pump, you can install an oil drain valve EA 10 GÜ/GB instead of plug
(58). With this valve in combination with a quick acting valve the pump may carefully drained
from oil by trained personnel (see chapter 9.6)
8.5 NORMAL OPERATION
When the pump has been installed properly a long lifetime is ensured.
It is strongly recommended that the following items are checked frequently:
Conical suction filter for contamination
Pump-circulation pipework for oil contamination
Pressure differential of the pump
Oil level in the oil chamber (see chapter 8.2)
Running sound of the pump
Once a year, or as dictated by the classification rules, the pump operation, settings and all
safety provisions
The date, time and results of each inspection should be recorded together with the serial
number.
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