8
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Piping installation
Installer reference guide
87
EPRA14~18D + ET23E
Daikin Altherma 3 H HT F
4P644739-1A – 2022.03
Part
Description
a
An automatic air intake (for air supply) should be installed at the
highest point. For example, an automatic air purge.
b
Protection for the field piping.
▪
Install the freeze protection valves:
-
At all lowest points of the field piping.
-
In the coldest part of the field piping, away from heat sources.
-
Vertically to allow water to flow out properly.
-
>15 cm above the ground to prevent ice from blocking the
water exit. Make sure there are no obstructions.
-
>10 cm away from other freeze protection valves.
▪
Prevent rain, snow and direct sunlight on the freeze protection
valves.
▪
Insulate the freeze protection valves in a similar way as the water
piping, but do NOT insulate the inlet and outlet (release) of these
valves.
▪
Do NOT make traps in the field piping.
>15 cm
>10 cm
c
Isolation of water inside the house when there is a power
interruption. Normally closed valves (located indoors near the
piping entry/exit points) can prevent that all water from indoor
piping is drained when the freeze protection valves open.
▪
When there is a power interruption:
The normally closed valves
close and isolate the water inside the house. If the freeze
protection valves open, only the water outside the house is
drained.
▪
In other circumstances
(example: when there is a pump failure):
The normally closed valves remain open. If the freeze protection
valves open, the water from inside the house is also drained.
NOTICE
When freeze protection valves are installed, set the minimum cooling setpoint
(default=7°C) at least 2°C higher than the maximum opening temperature of the
freeze protection valve. If lower, freeze protection valves can open during cooling
operation.
8.2.7 To fill the domestic hot water tank
1
Open every hot water tap in turn to purge air from the system pipe work.
2
Open the cold water supply valve.
3
Close all water taps after all air is purged.
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