To Fill The Domestic Hot Water Tank - Daikin EPRA18DAV3 Installer's Reference Manual

7.2.7 To fill the domestic hot water tank

EPRA14~18DAV3+W1 + ETVH/X16S18+23DA6V+9W(G)
Daikin Altherma 3 H HT F
4P587502-1B – 2020.12
a
a Automatic air intake
b Freeze protection valve (optional – field supply)
c Normally closed valves (recommended – field supply)
Part
An automatic air intake (for air supply) should be installed at the
a
highest point. For example, an automatic air purge.
Protection for the field piping. The freeze protection valves must
b
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.
Isolation of water inside the house when there is a power
c
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.
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.
4 Check for water leaks.
7
c
b c
b
Description
Piping installation
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Installer reference guide
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