Johnson Controls SABROE HeatPAC, Руководство по эксплуатации

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Operating manual - HeatPAC with reciprocating compressor
009332 en 2021.07
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Operating instructions
Leave all valves in their “in-operation positions” unless servicing or repair work is to be performed. Do
not turn off power to the heat pump unit as the oil heater must be connected to keep the correct oil
temperature.
Caution!
Wire connections to the motor and VSD must not be touched immediately after the heat pump unit is
powered down as the capacitors in the VSD may still be charged. Read the warning label on the VSD.
5.5.2 Shutting down for a long standstill period
Follow the Stopping for a brief period instructions and:
1. Turn of the oil heater and heat tracing.
2. Close suction and discharge valves.
3. Rotate the motor and compressor (weekly/monthly according to below).
4. If the compressor is water-cooled, drain of the water.
To reduce the risk of bearing damage, it is recommended to rotate (to a new position) the motor and
compressor on a monthly basis. If the heat pump is exposed to vibrations during a long shutdown period,
the position should be changed weekly. Avoid high vibration level.
5.6 Shutdown and alarms
5.6.1 Operating state
Experience has shown that variations in pressures and temperatures within the cooling cycle can pro-
vide information about the operating state of a heat pump.
In particular, suction and condensing pressures, as well as the temperatures of suction and pressure
gas, can provide important information.
Often, small changes in the variable pressures and temperatures are sufficient to create considerable
changes in the operating conditions.
It is therefore very important to use the already mentioned logbook. If a heat pump is not operating in op-
timal conditions, the economy of the plant will not be optimal either.
Irregularities in the plant will often cause changes in the operating conditions but not make the plant
stop. Consequently, the operating state of a refrigeration plant must be checked at regular intervals.
5.6.2 Troubleshooting
Too high condensing pressure
Cause Solution
Insufficient water flow through the
condenser
Adjust water supply, or clean the condenser.
Fouling in the condenser
Clean the condenser.
Too high hot water temperature Check hot water system, or reduce compressor capacity.
Air or non-condensable gases in the system Remove air from the condenser.