Gorenje HPWW12, Instructions For Installation And Start-Up

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Water-to-water Heat Pump
16
increase up to max. 2.5 bar. The increased volume will be absorbed by the expansion vessel,
whose dimensions must correlate with the capacity of the heating system (not all heating circuits
have a related expansion vessel). The safety valve should be triggered when the pressure reaches
3 bar.
Heating Water Minimum Flow Rate
During operation of the heat pump, the minimum required heating water flow rate must be assured!
This can be achieved by using various techniques including correct adjustment of the over-flow
valve or a valve manifold with no pressure differences.
Heat source temperature
oC
From To
Max. temperature difference between the pre-
flow and the return flow of the heating circuit
water oK
7 12 10
13 18 11
19 25 12
If after testing the heating circuit the heat pump fails to operate and if there is danger of freezing,
the heating circuit must be discharged in order to prevent damage to the heating system.