Daikin Altherma H Hybrid EJHA04AAV3 Installer's Reference Manual page 99

In case of third-party gas boiler
EJHA04AAV3 + EHY2KOMB28+32AA
Daikin Altherma H Hybrid
4P531180-1D – 2025.03
NOTICE
The water pressure indicated on the boiler display vary depending on the water
temperature (higher pressure at higher water temperature).
However, at all times water pressure shall remain above 1 bar to avoid air entering
the circuit.
INFORMATION
Air purge valves. In case of third-party gas boiler, the following air purge valves are
possible:
▪
Manual air purge valves on the shut-off valves (option EKBALLV1).
▪
Manual or automatic air purge valve inside the third-party gas boiler.
▪
Manual or automatic field-supplied air purge valves.
▪
Note: Automatic air purge valves are NOT allowed if glycol is used.
Before filling the space heating circuit, the gas boiler MUST be installed.
1 Flush the installation thoroughly to clean the circuit.
2 Connect the water supply hose to the fill/drain point.
Note: The fill/drain point can be:
▪ Field supplied
▪ Part of the existing installation
3 Power up the gas boiler, and make sure you can read out the pressure
indication.
Note: The pressure indication can be:
▪ On the boiler display of the third-party gas boiler
▪ On a field-supplied manometer
4 If an automatic air purge valve was installed, make sure it is open.
5 Fill the circuit with water until the boiler display indicates a pressure of ±2 bar
(with a minimum of 0.5 bar).
Note: The pressure relief valve of the outdoor unit is designed to open at
3 bar.
6 Purge air from all manual air purge valves in the system (open, purge air,
close).
7 Check the pressure. If it is too low, repeat from step 5.
8 Turn ON the pump, and check if you can still hear air in the circuit. After
±1 min, turn it OFF.
Note: To turn the pump ON and OFF, use the air purge function on the
outdoor unit's user interface. See
9 Turn ON the bivalent signal test, and check if you can still hear air in the
circuit. After ±1 min, turn it OFF.
Note: To turn the bivalent signal test, see
4
run" [ 190].
10 Purge air again from all manual air purge valves in the system (especially if you
heard air in the circuit).
11 Check the pressure again. If it is too low, repeat from step 5.
12 Disconnect the water supply hose from the fill/drain point.
"13.4.1 Air purge function" [
"13.4.3 To perform an actuator test
10 Installation
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4
188].
Installer reference guide
99