Daikin Altherma 3 R ECH2O - To Connect a Pressure Vessel; To Fill the Heating System

5 Piping installation
Installation manual
20
EBSH/X(B)11+16P30+50DF
Daikin Altherma 3 R ECH₂O
4P663483-1A – 2021.11
dc
b a
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, 1")
d Domestic cold water IN (cold water supply)(screw
connection, 1")
NOTICE
It is recommended to install shut-off valves on the space
heating/cooling water in and out connections, as well as on
the domestic cold water in and domestic hot water out
connections. These shut-off valves are field supplied.
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.
5.4.2 To connect a pressure vessel
1 Connect a suitably dimensioned and preset pressure vessel for
the heating system. There may not be any hydraulic blocking
elements between the heat generator and the safety valve.
2 Position the pressure vessel in an easily accessible place
(maintenance, parts replacement).
5.4.3 To fill the heating system
DANGER: RISK OF ELECTROCUTION
During the filling process, water can escape from any
leaking point and can cause an electrical shock if it comes
into contact with live parts.
▪ Before the filling process, de-energise the unit.
▪ After the first filling and before switching on the unit
with the mains switch, check whether all electric parts
and connection points are dry.
1 Connect a hose with a non-return valve (1/2") and an external
manometer (field supply) to a water tap and the fill and drain
valve. Secure the hose against slipping off.
j/k
e.1
B
AB
A
e.2
50%
(45%)
100%
0%
CH
Bypass
(B) (A)
f
a
h
i
c
j
k
d
b
g
50%
(67%)
100%
0%
CH
DHW
(A)
(B)
a Hose with a non-return valve (1/2") and an external
manometer (field supply)
b Fill and drain valve
c Space heating/cooling water OUT
d Space heating/cooling water IN
e.1 Valve motor
e.2 Valve motor latch
f Water tap
g Automatic air purge valve
h Pressure gauge (field supply)
i Pressure vessel (field supply)
j Bypass valve
k Tank valve
2 Prepare for air purging according to the instructions (see
"8.2.2To perform an air purge"[445]).
3 Open the water tap.
4 Open fill and drain valve and monitor the manometer.
5 Fill the system with water until the external manometer shows
that the system target pressure is reached (system height +2m;
1m water column = 0.1bar). Make sure that the pressure relief
valve does not open.
6 Close the manual air vent valves as soon as water emerges
free of bubbles.