To Fill The Water Circuit - Daikin EWYA004D2V3P Installer's Reference Manual

8 | Piping installation

8.2.5 To fill the water circuit

Installer reference guide
70
Part
Protection for the field piping.
b
▪ 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.
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.
To fill the water circuit, use a field supply filling kit. Make sure you comply with the
applicable legislation.
Description
>10 cm
>15 cm
and packaged air to water heat pumps
EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
4P688013-1B – 2022.09