Gas Boiler; Opening The Gas Boiler; To Disassemble The Gas Boiler - Daikin Altherma H Hybrid EJHA04AAV3 Installer's Reference Manual

15.4 Gas boiler

15.4.1 Opening the gas boiler

15.4.2 To disassemble the gas boiler

EJHA04AAV3 + EHY2KOMB28+32AA
Daikin Altherma H Hybrid
4P531180-1D – 2025.03
▪ Check if the water coming out of the relief valve is clean. If it contains debris or
dirt:
- Open the valve until the discharged water does not contain debris or dirt
anymore.
- Flush and clean the complete tank, including the piping between the relief
valve and cold water inlet.
To make sure this water originates from the tank, check after a tank heat up cycle.
INFORMATION
It is recommended to perform this maintenance more than once a year.
Switch box
Carry out a thorough visual inspection of the switch box and look for obvious
defects such as loose connections or defective wiring.
WARNING
If the internal wiring is damaged, it has to be replaced by the manufacturer, its
service agent or similarly qualified persons.
Freeze protection valves
▪ Replace the freeze protection valves every 3~7 years (depending on the water
quality).
▪ Replace the freeze protection valves if they do not close properly anymore.
Example: When they opened and dirt got stuck inside the valves.
Example: Replace the freeze protection valve inside the outdoor unit as follows:
a Connection piece for freeze protection valve
b1 Old freeze protection valve
b2 New freeze protection valve
Vacuum breaker
Dismantle the vacuum breaker and clean it's cartridge with water.
In case of malfunction: replace the vacuum breaker.
See "10.2.3 To open the gas
1 Turn off the appliance.
2 Turn off the main power supply of the appliance.
3 Close the gas tap.
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Maintenance and service
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Installer reference guide
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