Checklist During Commissioning; Minimum Flow Rate; Air Purge Function - Daikin Altherma 3 H HT F Series Installer's Reference Manual

10.4 Checklist during commissioning

10.4.1 Minimum flow rate

10.4.2 Air purge function

EPRA14~18DAV3+W1 + ETVH/X16S18+23DA6V+9W(G)
Daikin Altherma 3 H HT F
4P587502-1 – 2019.07
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 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" [ 74].
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
25 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.
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.
"10.4.4 Actuator test
(a)
and modify the bypass valve setting to
10 Commissioning
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"7.1 Preparing water
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4
run" [ 202]). —
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Installer reference guide
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