Daikin Altherma 3 H MT F, Installer'S Reference Manual

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11 | Commissioning
Installer reference guide
209
EPRA08~W1 + ET9W
Daikin Altherma 3 H MT F
4P634887-1 – 2021.03
There is NO water leak inside the indoor unit.
The shut-off valves are properly installed and fully open.
The automatic air purge valves are open.
The pressure relief valve purges water when opened. Clean water MUST come out.
The minimum water volume is guaranteed in all conditions. See "To check the water
volume and flow rate" in "8.1 Preparing water piping" [ 4 67].
The domestic hot water tank is filled completely.
11.4 Checklist during commissioning
The minimum flow rate during backup heater/defrost operation is guaranteed in all
conditions. See "To check the water volume and flow rate" in "8.1 Preparing water
piping" [
4
67].
To perform an air purge .
To perform a test run .
To perform an actuator test run .
Underfloor screed dryout function
The underfloor screed dryout function is started (if necessary).
11.4.1 Minimum flow rate
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.
Minimum required flow rate
20 l/min
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 "11.4.4 Actuator test run" [
4
214]). —
4 Read out the flow rate
(a)
and modify the bypass valve setting to
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.