Daikin Altherma H Hybrid EJHA04AAV3 Installer's Reference Manual page 198

15 | Maintenance and service
Installer reference guide
198
▪ Pressure relief valve of the domestic hot water tank
▪ Switch box
▪ Freeze protection valves
▪ Vacuum breaker
Heat exchanger
The heat exchanger of the outdoor unit can get blocked up due to dust, dirt,
leaves, etc. It is recommended to clean the heat exchanger yearly. A blocked heat
exchanger can lead to too low pressure or too high pressure leading to worse
performance.
Water pressure
Keep water pressure above 1 bar. If it is lower, add water.
Water filter
Clean the water filter.
NOTICE
Handle the water filter with care. Do NOT use excessive force when you reinsert the
water filter so as NOT to damage the water filter mesh.
Water pressure relief valve
Open the valve and check if it operates correctly. The water may be very hot!
Checkpoints are:
▪ The water flow coming from the relief valve is high enough, no blockage of the
valve or in between piping is suspected.
▪ Dirty water coming out of the relief valve:
- open the valve until the discharged water does NOT contain dirt anymore
- flush the system and install an additional water filter (a magnetic cyclone filter
is preferable).
It is recommended to do this maintenance more frequently.
Pressure relief valve of the domestic hot water tank (field supply)
Open the valve.
CAUTION
Water coming out of the valve may be very hot.
▪ Check if nothing blocks the water in the valve or in between piping. The water
flow coming from the relief valve must be high enough.
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EJHA04AAV3 + EHY2KOMB28+32AA
Daikin Altherma H Hybrid
4P531180-1D – 2025.03