To Connect The Recirculation Piping; To Connect The Pressure Relief Valve To The Drain; To Fill The Water Circuit - Daikin Altherma EHVH04S18CB3V Installer's Reference Manual

7 Installation
NOTICE
It is recommended to install shut-off valves to domestic
cold water in and domestic hot water out connections.
Shut-off valves are field supplied.
NOTICE
To avoid damage to the surroundings in case of water
leakage, it is recommended to close the cold water inlet
shut‑off valves during periods of absence.
2 Screw the indoor unit nuts on the shut-off valves.
3 Connect the domestic hot water in and out pipes to the indoor
unit.
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
a higher position than the 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.
7.8.4

To connect the recirculation piping

Prerequisite: Only required if you need recirculation in your system.
1 Loosen and remove the 4 screws that fix the top panel.
2 Remove the top panel from the unit.
4×
3 In case of a unit with a tank capacity of 180 l, remove the
expansion vessel.
4 Remove the top insulation.
5 Cut out part (c) from the top insulation.
Tank capacity
180 l
260 l
Installer reference guide
38
Cut out position
Left OR right
Backside
6 Connect the recirculation piping to the recirculation connection
(b) and route the piping through the hole at the backside of the
unit (a).
A
a
b
a Piping intake hole
b Recirculation connection
c Cut-out location
7 Reattach the top insulation, expansion vessel (in case of a unit
with a tank capacity of 180 l), and casing.
7.8.5 To connect the pressure relief valve to the
drain
The blow out of the pressure relief valve is coming out of the
backside of the unit.
a
b
a Pressure relief blow-out
b Drain outlet (only for EHVX)
The blow out should be connected to an appropriate drain according
to the applicable legislation. It is recommended to use a tundish.
7.8.6

To fill the water circuit

1 Connect the water supply hose to the fill valve.
ERLQ004~008CA + EHVH/X04+08S18+26CB
180 l
A
260 l
180°
Daikin Altherma – Low temperature split
4P384973-1A – 2016.02
c