Daikin Altherma EHYKOMB33AA - To Check the Minimum Flow Rate; Air Purge Function

12 | Commissioning
Installer reference guide
197
EVLQ05+08CA + EHYHBH05A + EHYHBH/X08A + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1G – 2022.09
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 perform a gas pressure test.
To perform a test run on the gas boiler.
12.4.1 To check the minimum flow rate
1 Confirm according to the hydraulic configuration which space heating loops
can be closed due to mechanical, electronic, or other valves.
2 Close all space heating loops that can be closed (see previous step).
3 Start the pump test run operation (see "12.4.4 To perform an actuator test
run"[4200]).
4 Go to [6.1.8]: > Information > Sensor information > Flow rate to
check the flow rate. During pump test run operation, the unit can operate
below this minimum required flow rate.
Bypass valve foreseen?
Yes No
Modify the bypass valve setting to reach
the minimum required flow rate + 2l/
min
In case the actual flow rate is below the
minimum flow rate, modifications at the
hydraulic configuration are required.
Increase the space heating loops that
can NOT be closed or install a
pressure‑controlled bypass valve.
Minimum required flow rate
05 models 7l/min
08 models 8l/min
12.4.2 Air purge function
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.
NOTICE
Before starting the air purge, open the safety valve and check if the circuit is
sufficiently filled with water. Only if water escapes the valve after opening it, you can
start the air purge procedure.
Manual or automatic
There are 2 modes for purging air:
There are 2 modes for purging air: