Section 8: OperationPage 40
8.3.5 Unblock pump function
When the heat pump is stopped for more than 48 hours (parameter 4211), the
water pump turns ON for 5 seconds (parameter 4212) to prevent seizing up
and increases the life time of the pump.
In the case of the main pump and the additional pump, the down time after
the previous operation stop is counted individually. Furthermore, the pump
operation time can be set individually to prevent seizing.
8.3.6 Pump output adjustment function
Adjust the main water pump output so that the required flow rate is produced
in the heating system.
Using the DIP SW on the Terminal PCB, three level settings are possible.
To select one of the three performance curves, set DIP SW5 and DIP SW6 as
shown in Figure 8-9.
Factory default setting:
DIP SW5 and DIP SW6 set to OFF (level 3)
Level
Parameter
Function description
Display and input value
Remarks
Group Code Default Min. Max. Unit
I 4 2 11 OFF time for unblock pump function start 48 0 240 1 hr
I 42 12 Time ON main water pump for unblock pump function 5 0 10 1 sec
Table 8-8: Unlock pump function parameters
ON
OFF
DIP SW.
Level 3
(Maximum)
ON
OFF
Level 2
(Medium)
ON
OFF
Level 1
(Minimum)
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
Figure 8-9: Pump output adjustment flow rate - DIP switches
An excessively low flow rate may cause
problems including reduced capacity and poor
circulation.
NOTE
To Next Page
Loading...
Need help?
General
