Connecting The Water Piping; To Connect The Water Piping; To Fill The Water Circuit - Daikin Altherma Installer's Reference Manual

a From the multilingual fluorinated greenhouse gases
label peal off the applicable language and stick it on
top of a.
b Factory refrigerant charge: see unit name plate
c Additional refrigerant amount charged
d Total refrigerant charge
2 Fix the label on the inside of the outdoor unit near the gas and
liquid stop valves.
7.5

Connecting the water piping

7.5.1

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, 2 shut-off valves are provided.
Mount the valves on the water inlet and on the water outlet. Mind
their the position. Orientation of the integrated drain valves is
important for servicing.
1 Install the shut-off valves on the water pipes.
b a
a Water inlet
b Water outlet
NOTICE
To avoid damage to the surroundings in case of water
leakage, it is recommended to close the cold water inlet
stop valves during periods of absence.
2 Screw the indoor unit nuts on the shut-off valves.
3 Connect the field piping on the shut-off valves
4 In case of connection with the optional domestic hot water tank,
see the installation manual of the domestic hot water tank.
ERLQ004~008CAV3 + EHBH/X04+08CA
Daikin Altherma - Low Temperature Split
4P313774-1C – 2012.11
NOTICE
▪ A drain device and pressure relief device should be
installed on the cold water inlet connection of the
domestic hot water cylinder.
▪ To avoid back siphonage, it is recommended to install a
non-return valve on the water inlet of the domestic hot
water tank in accordance with the applicable legislation.
▪ It is recommended to install a pressure reducing valve
on the cold water inlet in accordance with the
applicable legislation.
▪ An expansion vessel should be installed on the cold
water inlet in accordance with the applicable legislation.
▪ It is recommended to install the pressure relief valve on
higher position as top of the domestic hot water tank.
Heating of the domestic hot water tank causes water to
expand and without pressure relief valve the water
pressure inside the tank can rise above the tank design
pressure. Also the field installation (piping, tapping
points, etc.) connected to the tank is subjected to this
high pressure. To prevent this, a pressure relieve valve
needs to be installed.
The overpressure prevention depends on the correct
operation of the field installed pressure relief valve. If
this is NOT working correctly, overpressure will deform
the tank and water leakage may occur. To confirm
good operation, regular maintenance is required.
7.5.2

To fill the water circuit

1 Connect the water supply hose to the drain and fill valve.
2 Open the drain and fill valve.
3 Make sure that the automatic air purge valve is open (at least 2
turns).
INFORMATION
For location of
"15.3.3 Components: Indoor unit" on page 79.
4 Fill the circuit with water until the manometer indicates a
pressure of ±2.0 bar.
5 Purge as much air as possible from the water circuit.
NOTICE
▪ Air in the water circuit can cause malfunctioning of the
backup heater. During filling, it may not be possible to
remove all the air from the circuit. Remaining air will be
removed through the automatic air purge valves during
the initial operating hours of the system. Additional
filling with water afterwards may be required.
▪ To purge the system, use the special function as
described in the chapter "9 Commissioning" on
page 68. This function should be used to purge the
heat exchanger coil of the domestic hot water tank.
6 Close the drain and fill valve.
7 Disconnect the water supply hose from the drain and fill valve.
7 Installation
the air purge valve, see
Installer reference guide
35