Daikin Altherma EHYHBH05A Series, Installer'S Reference Manual

Page: 198 / 264

12 | Commissioning
Installer reference guide
198
08CA + EHY EHYHBH/X08A + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1G – 2022.09
▪ Manually: the unit will operate with a fixed pump speed (high or low), which can
be set. The position of the 3-way valve for the optional domestic hot water tank
as well as that of the gas boiler's bypass valve can also be set. To ensure all air
will be removed, however, it is recommended NOT to adjust their custom
position.
▪ Automatic: the pump alternates between high speed, low speed and standstill
position. The position of the 3-way valve automatically alternates between that
for space heating and that for domestic hot water heating. The gas boiler is
continuously bypassed. To remove air from the gas boiler, perform a manual air
purge on the gas boiler.
Typical workflow
Purging the air from the system should consist of:
1 Performing a manual air purge
2 Performing an automatic air purge
INFORMATION
Start by performing a manual air purge. When almost all the air is removed, perform
an automatic air purge. If necessary, repeat performing the automatic air purge until
you are sure that all air is removed from the system. During air purge function, pump
speed limitation [9‑0D] is NOT applicable.
Air purge prerequisites
3 Install air purges on each part of the installation where the pipe work goes
down. (For example on a tank with connections on top.)
4 Fill the circuit to ±2 bar.
5 Purge all radiators and all other air purges installed on the circuit.
6 Repeat steps 2 and 3 until purging the radiators and the other points does NOT
longer lead to a pressure drop.
7 Make sure that the leaving water temperature home page, room temperature
home page, and domestic hot water home page are turned OFF.
When an air bubble blocks the pump and there is no flow, a 7H error can occur. In
this case, stop the air purge function and restart the operation. This will cause the
bubble to leave the pump. Make sure the pressure in the circuit is ±2 bar and refill
if necessary.
To check if the air purge function is finished, monitor the flow rate. If it stays
constant when the pump is running at high or low speed, the unit is properly
purged. To monitor the flow rate, go to [6.1.8].
The air purge function automatically stops after 42 minutes.
INFORMATION
For best results, air purge each loop separately.
To perform a manual air purge
Prerequisite: Make sure that the leaving water temperature home page, room
temperature home page, and domestic hot water home page are turned OFF.
1 Set the user permission level to Installer. See "To set the user permission level
to Installer" [
4
131].
2 Set the air purge mode: go to [A.7.3.1] > Installer settings >
Commissioning > Air purge > Type .
3 Select
Manual
and press .