Connecting The Water Piping; To Connect The Water Piping; To Connect The Recirculation Piping; To Fill The Water Circuit - Daikin EHVZ08S23DA6V Installation Manual

b Refrigerant gas connection
2 Connect the gas stop valve from the outdoor unit to the
refrigerant gas connection of the indoor unit.
INFORMATION
When the indoor unit is installed in a place with limited
space, an optional pipe bend (EKHVTC) kit can be
installed to facilitate the connection to the refrigerant gas
and liquid connections of the indoor unit. For installation
instructions, see the instruction sheet of the pipe bend kit.
4.4

Connecting the water piping

4.4.1

To connect the water piping

NOTICE
Do NOT use excessive force when connecting the piping.
Deformation of the piping can cause malfunctioning of the
unit.
To facilitate service and maintenance, 4 shut-off valves and 1
overpressure bypass valve are provided. Mount the shut-off valves
on the space heating water inlets and space heating water outlets.
To ensure the minimum flow rate (and prevent overpressure), install
the overpressure bypass valve on the space heating water outlet
for the additional zone.
NOTICE
This unit is designed for operation on 2 temperature zones:
▪ underfloor heating in the main zone, this is the zone
with the lowest water temperature,
▪ radiators in the additional zone, this is the zone with
the highest water temperature.
1 Install the shut-off valves on the space heating water pipes.
2 Screw the indoor unit nuts on the shut-off valve.
3 Connect the domestic hot water in and out pipes to the indoor
unit.
c d a b
f e
a Space heating additional zone water out
b Space heating additional zone water in
c Domestic hot water out
d Domestic cold water in (cold water supply)
e Space heating main zone water out
f Space heating main zone water in
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.
EHVZ04+08S18+23DA + EHVZ04+08S18+23DJ
Daikin Altherma 3 R F
4P584429-1 – 2019.06
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" on page 8
check the minimum flow rate" on
NOTICE
If you install this unit as a single-zone application, then:
Setup. Install a bypass between the space heating water
inlet and outlet of the additional zone (=direct zone). Do
NOT interrupt the water flow by closing the shut-off valves.
a Bypass
Configuration. Set field setting [7-02]=0 (Number
zones = Single zone).
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.
4.4.2

To connect the recirculation piping

Prerequisite: Only required if you need recirculation in your system.
1 Remove the top panel from the unit, see
indoor unit" on page 8.
2 Cut out the rubber grommet on top of the unit, and remove the
stop. The recirculation connector is placed below the hole.
3 Route the recirculation piping through the grommet and connect
it to the recirculation connector.
4 Reattach the top panel.
4.4.3

To fill the water circuit

To fill the water circuit, use a field supply filling kit. Make sure you
comply with the applicable legislation.
4 Installation
"3.2.1 To check
and "6.2.1 To
page 24.
a
of
"4.1.1 To open the
Installation manual
11