Daikin ETSX16E Installer's Reference Manual page 239

11.4 Checklist during commissioning
11.4.1 Minimum flow rate
EPRA14~18D + ETSH/X(B)16P30+50E
Daikin Altherma 3 H HT ECH₂O
4P679467-1D – 2023.11
Backup heater circuit breaker F1B (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. All electric components and connections are
dry.
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
The storage 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).
To set up a bivalent heat source.
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
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
▪ Do air purge.
▪ Check the function of the valve motor of M1S and M2S.
Replace the valve motor if necessary.
"8.1 Preparing water piping" [
"11.4.4 Actuator test
(a)
. If the flow rate is too low:
11 Commissioning
|
4 86].
"8.1 Preparing water
4
run" [ 243]).
Installer reference guide
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