4 Piping installation
Installation manual
7
ETVH/9W(G)
Daikin Altherma 3 H HT F
4P586454-1 – 2019.07
Option 2: Through the right side panel
1
3×
T25
3
2
4
Piping installation
4.1
Preparing water piping
NOTICE
In case of plastic pipes, make sure they are fully oxygen
diffusion tight according to DIN 4726. The diffusion of
oxygen into the piping can lead to excessive corrosion.
4.1.1
To check the water volume and flow rate
Minimum water volume
There are no requirements for the minimum water volume.
Minimum flow rate
Check that the minimum flow rate in the installation is guaranteed in
all conditions. This minimum flow rate is required during defrost/
backup heater operation. For this purpose, use the overpressure
bypass valve delivered with the unit.
NOTICE
To guarantee proper operation it is recommended to have
a minimum flow of 28 l/min during DHW.
NOTICE
If glycol was added to the water circuit, and the
temperature of the water circuit is low, the flow rate will
NOT be displayed on the user interface. In this case, the
minimum flow rate can be checked by way of the pump
test (check that the user interface does NOT display error
7H).
NOTICE
When circulation in each or certain space heating loops is
controlled by remotely controlled valves, it is important that
the minimum flow rate is guaranteed, even if all valves are
closed. In case the minimum flow rate cannot be reached,
a flow error 7H will be generated (no heating or operation).
See the installer reference guide for more information.
Minimum required flow rate
25 l/min
See the recommended procedure as described in
4.2
Connecting the water piping
4.2.1
To connect the water piping
1
Connect the O-rings and shut-off valves to the outdoor unit
water connection pipes of the indoor unit.
2
Connect the outdoor unit field piping to the shut-off valves.
3
Connect the O-rings and shut-off valves to the space heating/
cooling water pipes of the indoor unit.
4
Connect the space heating/cooling field piping of both zones to
the shut-off valves.
5
Connect the domestic hot water in and out pipes to the indoor
unit.
c
d
a
b
e
f
a
Space heating/cooling water OUT (screw connection, 1")
b
Space heating/cooling water IN (screw connection, 1")
c
Domestic hot water OUT (screw connection, 3/4")
d
Domestic cold water IN (cold water supply)(screw
connection, 3/4")
e
Outdoor unit water OUT (screw connection, 1")
f
Outdoor unit water IN (screw connection, 1")
NOTICE
It is recommended to install shut-off valves to domestic
cold water in and domestic hot water out connections.
These shut-off valves are field supplied.
NOTICE
Overpressure bypass valve
(delivered as accessory). We
recommend to install the overpressure bypass valve in the
space heating water circuit.
Mind the minimum flow rate when adjusting the
overpressure bypass valve setting. See
the water volume and flow rate"
7] and
NOTICE
Install air purge valves at all local high points.
NOTICE
A pressure relief valve (field supply) with an opening
pressure of maximum 10 bar (= 1 MPa) must be installed
on the domestic cold water inlet connection in accordance
with the applicable legislation.
4.2.2
To connect the recirculation piping
Prerequisite:
Only required if you need recirculation in your system.
1
Remove the top panel from the unit, see
2
Cut out the rubber grommet on top of the unit, and remove the
stop. The recirculation connector is placed below the hole.
Summary of Contents for Altherma 3 H HT F ETVH16S18DA6V
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