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Piping installation
Installer reference guide
86
EPRA14~W1 + ETBH/9W
Daikin Altherma 3 H HT W
4P587501-1B – 2020.10
c
c
b
b
a
a
Automatic air intake
b
Freeze protection valve (optional – field supply)
c
Normally closed valves (recommended – field supply)
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. The freeze protection valves must
be installed:
▪
vertically to allow water to flow out properly and free from
obstructions.
▪
at all lowest points of the field piping.
▪
in the coldest part and away from heat sources.
Note:
Leave at least 15 cm clearance from the ground to prevent
ice from blocking the water exit.
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, do NOT select a minimum cooling
setpoint lower than 7°C (7°C=default). If lower, freeze protection valves can open
during cooling operation.
7.2.6 To fill the domestic hot water tank
See the installation manual of the domestic hot water tank.
7.2.7 To insulate the water piping
The piping in the complete water circuit MUST be insulated to prevent
condensation during cooling operation and reduction of the heating and cooling
capacity.
