23
4.5 Circuit Flow Commissioning
4.5.1 Set pump speed
Calculate the required flow rate based on the number of tubes. A flow rate of 1 litre per
minute is required for every 10 tubes, so:
-
If you have 20 tubes, you need 2 litres per minute
-
If you have 50 tubes, you need 5 litres per minute.
The maximum flow rate that can be achieved with the pump station as supplied is 8 litres per
minute (the maximum reading on the flow indicator). If a higher flow rate is required (for an
installation of more than 80 tubes) an alternative high flow indicator can be fitted. Consult
the Customer Care Centre.
Following the instructions supplied with the solar system controller (SSC~), manually activate
the circulating pump by accessing the HND Menu and setting HDN1 to
On
. Ensure any
motorised valve opens and the circulating pump starts.
Set the pump speed to its minimum setting,
1
, using the pump speed adjuster.
Turn the flow adjuster to its mid position,
F
, which gives the maximum flow rate.
Read the flow rate from the flow indicator. The reading is taken from the bottom edge of the
float body. Is the reading more than or equal to the required flow rate for the number of
manifolds fitted?
If
NO
:
Increase the pump speed until the reading is more than or equal to the required flow rate.
If
YES
:
Proceed to Step 4.5.2.
Figure 24: Circuit flow commissioning
4.5.2 Set flow adjuster
Set the flow adjuster by turning the valve until the reading is equal to the required flow rate.
If the required flow rate cannot be achieved at any flow adjuster setting, increase the pump
speed and repeat the process. If the required flow rate cannot be achieved at any pump
speed setting, it may be necessary increase the size of the pipework or to fit a higher head
pump. Consult the Customer Care Centre.
With the pump speed and flow adjuster correctly set to provide the required flow rate, access
the HND Menu and set HDN1 to
Off
. Ensure the circulating pump stops.
Pump Speed Adjuster
Flow Adjuster
Flow Indicator
Summary of Contents for Solar SHP20
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