Connecting Water Piping; To Connect The Water Piping; To Fill The Water Circuit; To Protect The Water Circuit Against Freezing - Daikin EWAA008D2V3P-H Installation Manual

5.2

Connecting water piping

5.2.1

To connect the water piping

NOTICE
Do NOT use excessive force when connecting the field
piping and make sure the piping is aligned properly.
Deformation of the piping can cause malfunctioning of the
unit.
NOTICE
When connecting the field piping, hold the nut on the inside
of the unit in place using a spanner to provide extra
leverage.
1 Connect the shut-off valve (with integrated filter) to the outdoor
unit water inlet, using thread sealant.
a
a Water OUT (screw connection, male, 1")
b Water IN (screw connection, male, 1")
c Shut-off valve with integrated filter (delivered as
accessory)(2× screw connection, female, 1")
d Thread sealant
2 Connect the field piping to the shut-off valve.
3 Connect the field piping to the outdoor unit water outlet.
NOTICE
About the shut-off valve with integrated filter (delivered as
accessory):
▪ The installation of the valve at the water inlet is
mandatory.
▪ Mind the flow direction of the valve.
NOTICE
For service purposes, it is recommended to also install a
shut-off valve and drain point to the water OUT connection.
This shut-off valve and drain point are field supplied.
EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688014-1D – 2022.10
b
b
1
d
2
c
NOTICE
Install air purge valves at all local high points.
5.2.2

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
The unit contains an automatic air purge valve. 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.
5.2.3 To protect the water circuit against
freezing
About freeze protection
Frost can damage the system. To prevent the hydraulic components
from freezing, the software is equipped with special frost protection
functions such as water pipe freeze prevention and drain prevention
(see the installer reference guide) that include the activation of pump
in case of low temperatures.
However, in case of a power failure, these functions cannot
guarantee protection.
Do one of the following to protect the water circuit against freezing:
▪ Add glycol to the water. Glycol lowers the freezing point of the
water.
▪ Install freeze protection valves. Freeze protection valves drain the
water from the system before it can freeze. 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.
NOTICE
If you add glycol to the water, do NOT install freeze
protection valves. Possible consequence: Glycol leaking
out of the freeze protection valves.
NOTICE
If you add glycol to the water, you also need to install a
flow switch (EKFLSW2).
Freeze protection by glycol
About freeze protection by glycol
Adding glycol to the water lowers the freezing point of water.
WARNING
Ethylene glycol is toxic.
5 Piping installation
Installation manual
13