4 Piping installation
Installation manual
8
EPRA14~W1
Daikin Altherma 3 H HT
4P586100-1 – 2019.07
1
1
2
3
3
1
1
2
3
4
3×
3.4
To remove the transportation stay
NOTICE
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
The transportation stays (2×) protect the unit during transport.
During installation they must be removed.
a
a
Transportation stays (2×)
1
Open the switch box cover. See
2
Remove the screws (4×) from the transportation stays.
3
Remove the transportation stays (2×), and dispose of them.
4
Reattach the screws to the unit.
4
Piping installation
4.1
Connecting the water piping
4.1.1
To connect the water piping
1
Connect the shut-off valve (with integrated filter) to the outdoor
unit water inlet, using thread sealant.
c
a
b
b
d
1
2
a
Water OUT (screw connection, male, 1")
b
Water IN (screw connection, male, 1")
c
Shut-off valve with integrated filter (delivered as accessory)
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
Install air purge valves at all local high points.
4.1.2
To fill the water circuit
See the installation manual of the indoor unit, or the installer
reference guide.
4.1.3
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.
NOTICE
If you add glycol to the water, do NOT install freeze
protection valves.
Possible consequence:
Glycol leaking
out of the freeze protection valves.
Freeze protection by glycol
Adding glycol to the water lowers the freezing point of the water.
The required concentration depends on the lowest expected outdoor
temperature, and on whether you want to protect the system from
bursting or from freezing. To prevent the system from freezing, more
glycol is required. Add glycol according to the table below.
INFORMATION
▪ Protection against bursting: the glycol will prevent the
piping from bursting, but NOT the liquid inside the
piping from freezing.
▪ Protection against freezing: the glycol will prevent the
liquid inside the piping from freezing.
Lowest expected
outdoor
temperature
Prevent from
bursting
Prevent from
freezing
–5°C
10%
15%
–10°C
15%
25%
–15°C
20%
35%
–20°C
25%
—
–25°C
30%
—
