Daikin Altherma 3 H F Installer's Reference Manual page 84

7 | Installation
Freeze protection by freeze protection valves
Installer reference guide
84
About freeze protection valves
It is the responsibility of the installer to protect the field piping against freezing.
When no glycol is added to the water, you can use freeze protection valves at all
lowest points of the field piping to drain the water from the system before it can
freeze.
To install freeze protection valves
To protect the field piping against freezing, install the following parts:
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, do NOT select a minimum cooling
setpoint lower than 8°C (8°C=default). If lower, freeze protection valves can open
during cooling operation.
c
b
c
b
Description
EPGA11~16DAV3 + EAVH16SU18+23DA6V
Daikin Altherma 3 H F
4P606487-1 – 2019.12