Daikin ALTHERMA, Installer'S Reference Manual

Page: 85 / 280

8 | Piping installation
Installer reference guide
85
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
4P620241-1 – 2020.06
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, 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.
8.2.5 To fill the water circuit
To fill the water circuit, use a field supply filling kit. Make sure you comply with the
applicable legislation.
NOTICE
For models with integrated backup heater : The unit contains an automatic air purge
valve on the backup heater. Make sure it is open. All automatic air purge valves in
the system (in the unit, and in the field piping –if any) must remain open after
commissioning.
For other models : The unit contains a manual air purge valve. Make sure it is closed.
Only open it when performing an air purge.
8.2.6 To fill the domestic hot water tank
See the installation manual of the domestic hot water tank.