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12
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Commissioning
12.4.1 Minimum flow rate
12.4.2 Air purge function
Installer reference guide
228
Purpose
For a correct operating unit, it is important to check if the minimum flow rate is
reached. If needed, modify the bypass valve setting.
If operation is...
Cooling
Heating/defrost
Domestic hot water production
To check the minimum flow rate: additional zone (mandatory)
1 Check the hydraulic configuration to find out which space
heating loops can be closed by mechanical, electronic, or other
valves.
2 Close all space heating loops that can be closed.
3 Start the pump test run (see
4 Read out the flow rate
reach the minimum required flow rate + 2 l/min.
(a)
During pump test run, the unit can operate below the minimum required flow rate.
To check the minimum flow rate: main zone (recommended)
INFORMATION
The pump of the additional zone ensures that the minimum flow rate for correct
operation of the unit is guaranteed.
1 Check with the hydraulic configuration which space heating
loops can be closed by mechanical, electronic, or other valves.
2 Close all space heating loops that can be closed (see previous
step).
3 Create a thermo request on the main zone only.
4 Wait 1 minute until the unit is stabilized.
5 If the additional pump is still assisting (the green LED on the
right hand sided pump is ON) increase the flow until the
additional pump is not assisting anymore (LED is OFF).
6 Go to [8.4.A]: Information > Sensors > Flow rate.
7 Read out the flow rate and modify the bypass valve setting to
reach the minimum required flow rate + 2 l/min.
Purpose
When commissioning and installing the unit, it is very important to remove all air in
the water circuit. When the air purge function is running, the pump operates
without actual operation of the unit and the removal of air in the water circuit will
start.
Then the minimum required flow rate
"12.4.4 Actuator test
(a)
and modify the bypass valve setting to
is...
16 l/min
22 l/min
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run" [
232]).
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ERLA11~16D + EBVZ16S18+23D
Daikin Altherma 3 R F
4P643604-1B – 2022.05
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