Commissioning
21.10.2015
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Copyright
2014 by: WATERKOTTE GmbH. Subject to changes.
Insulation resistance
After installation or after module has been cut off from power supply for an
extended period, the insulation resistance will drop below 1 MΩ due to re-
frigerant accumulating in the compressor. This is not a malfunction. Pro-
ceed as follows:
1.
Remove wires from compressor and measure insulation resistance
of compressor.
2.
If insulation resistance is below 1 MΩ, the compressor is faulty or
the resistance dropped due to refrigerant accumulation in com-
pressor.
3.
After wires are connected and power is switched on, compressor
starts to warm up. Remeasure insulation resistance based on acti-
vation times indicated below.
The insulation resistance drops due to refrigerant accumulation in
the compressor. Resistance will rise above 1 MΩ after compressor
has warmed up for 4 hours.
(The required compressor warm-up time varies according to at-
mospheric conditions and refrigerant accumulation.)
To operate the compressor with refrigerant accumulation, it must
be warmed up at least 12 hours to prevent failure.
4.
If insulation resistance rises above 1 MΩ, the compressor is not
faulty.
10.2
Initial start of heat pump
The initial start of the heat pump is performed by a qualified
WATERKOTTE system partner.
Figure 11:ON / OFF switch (arrow)
Switch is lit => power supply switched on (regular operation)
Starting operation directly after turning on power switch can cause severe
damage to internal parts! Keep main power switch on during period of op-
eration.After all checks have been conducted (Kap. 10), proceed as follows:
1.
Turn on main power switch (on heat pump)
2.
The compressor does not start immediately, because the oil
dump
