Daikin Altherma EJHA04AAV3 Installation Manual page 14

5 Installation
Part
b3+b4 (Optional – Field supply).
It is the installer's responsibility to protect the field
piping against freezing. One possibility is to install
freeze protection valves at all lowest points of the field
piping. If you do so, always install the freeze protection
valves in pair:
b3 Freeze protection valve (head-up for air supply)
b4 Freeze protection valve (head-down for water
drainage)
c c Normally closed valves
(Recommended – Field supply).
Normally closed valves can prevent that all water from
the system 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.
To connect a+b1+b2
2
2×
2×
a Connection piece for b1
b1 Freeze protection valve (for water drainage)
b2 Vacuum breaker (head-up for air supply)
1 Open the top plate.
2 Open the front plate.
3 Open the rear plate.
4 Connect a+b1 as follows:
Installation manual
14
Description
b3
b4
2×
1
3
4×
4 (a+b1)
5 (b2)
1 Remove the clip.
2 Remove and discard the stop with the sealing.
3 Attach the freeze protection valve (b1) to the connection
piece (a), using thread sealant.
1
4 Attach the connection piece to the outdoor unit.
5 Attach the clip.
6 Close the rear plate, front plate and top plate.
5 Do one of the following to connect b2 (2 possibilities):
NOTICE
Vacuum breaker (b2). To make proper drainage through
the freeze protection valve inside the outdoor unit possible,
the vacuuum breaker must be installed correctly:
▪ Directly at the water outlet of the unit, without any field
piping or valve in between.
▪ Head-up for air supply.
Possibility 1 With option EKBALLV1 (shut-off valves
with integrated connection for the vacuum
b2 breaker).
For installation instructions, see the
installation manual of the shut-off valves.
Daikin Altherma hybrid monobloc – Heat pump module
a
2
b1
EJHA04AAV3
4P530607-1B – 2018.10