[ VI Control ]
- 106 -
HWE1708A GB
[2] Controlling HBC Controller
Water pump control
-1- Water pump control
Depending on the capacity required, temperature difference on the indoor units is controlled so as to be within a certain range.
During normal operation, the changes in specified voltage of the water pump corresponding to the capacity of connectable
indoor units are shown in the graph below.
The specified voltage changes with the load on the indoor unit side. (A sample is shown in the graph above.)
(1) Periodic specified voltage control
1) Periodic control cycle
Specified voltage control is performed after the following times have elapsed.
Thirty seconds after either compressor startup or the completion of the defrost cycle
2) The amount of frequency change
The amount of specified voltage change is controlled to approximate the target value based on the target temperature differ-
ence.
3) The voltage control range and control content vary with the version of the equipment and the software.
Connectable capacity
Minimum
connectable
capacity
100%
Specified voltage
Minimum
voltage
6V
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