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11.4 Checklist during commissioning
11.4.1 Minimum flow rate
EPRA14~18D + ETBH/X16E
Daikin Altherma 3 H HT W
4P644736-1D – 2023.10
Backup heater circuit breaker F1B (field supply) is turned ON.
Only for tanks with built-in booster heater:
Booster heater circuit breaker F2B (field supply) is turned ON.
The correct pipe size is installed and the pipes are properly insulated.
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 (space heating circuit) 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
(if applicable) The domestic hot water tank is filled completely.
The minimum flow rate during backup heater/defrost operation is guaranteed in all
conditions. See "To check the water volume and flow rate" in
4
piping" [
86].
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).
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
▪
For E models: 25 l/min
▪
For E7 models: 22 l/min
To check the minimum flow rate
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.
"8.1 Preparing water
piping" [
"11.4.4 Actuator test
(a)
and modify the bypass valve setting to
11
Commissioning
|
4
86].
"8.1 Preparing water
4
run" [
238]).
Installer reference guide
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