This function can be activated to avoid measuring the buffer supply temperature in standing water.
This function will be acive only for the operation modes 1 and 2. Since in operation modes 5 and 6 we do not need a buffer charging, it does not matter what value the supply temperature sensor measures.
When all the charging valves are closed for a time period longer than PMP-03, the pump will be started for a time as defined by the parameter PMP-02. When any of the charging valve opens the pump will be switched on immediately and run as long as any of the valves is open.
When the parameter PMP-03 is equal to “0”, the pump will not start at closed charging valves. And the cyclic operation will be disabled.
Attention: the first charging valve has to be a changeover valve, otherwise the pump would run against closed valve.
Table 9. Parameter List
Description |
Value Range |
Default Value |
Unit |
|
PMP-02: pump run time at vlosed valves |
0...3600 |
120 |
sec |
|
PMP-03: pump restart at closed valves; 0 = disable |
0...3600 |
1800 |
sec |