36
(a) Minimum cable section AWG18 (0.75 mm
2
).
(b)The thermistor cable are delivered with the unit
：
if the current of the load is large, an AC contactor is needed.
1
2
3
4
5
9
Description
AC/DC
Required number of conductors
Maximum running current
Item
DHW pump control cable
SV2: 3-way valve control cable
SV1: 3-way valve control cable
Booster heater control cable
Room thermostat cable
User interface cable
Solar energy kit signal cable
AC
2
200mA
AC
5
200mA
AC
2
200mA(a)
AC
2
3
200mA(a)
AC
200mA(a)
AC
3
200mA(a)
AC
2
200mA(a)
6
7
8
Outside circulation pump control cable
Solar pump control cable
AC
2
200mA(a)
AC
2
200mA(a)
1
2
5
7
8
6
4
H
25
T
D
A
K
K
K
K
J
G
E
L
L
9
B
CN11
CN7
CN30
1
A
2
B
3
X
4
Y
5
E
6
P
7
Q
8
E
9
H1
10
H2
25
�����
HT
29
��
N
30
R1
31
DFT1
32
DFT2
26
����
R2
27
AHS1
28
AHS2
1
SL1
2
SL2
3
�
C
4
TBH
5
�
N
6
1ON
7
1OFF
8
P_o
9
N
10
�
11
�
N
12
�
24
3OFF
23
N
21
N
20
IBH1
19
18
13
H
14
L1
15
N
16
P_c
17
N
22
P_s
2ON
2OFF
P_d
3ON
3
M
F
C
I
ti
n
u
y
l
b
m
e
s
s
A
e
d
o
C
ti
n
u
y
l
b
m
e
s
s
A
e
d
o
C
)
y
l
p
p
u
s
d
l
e
if
(
p
m
u
p
W
H
D
:
d
_
P
G
ti
n
u
Main
A
)
y
l
p
p
u
s
d
l
e
if
(
e
v
l
a
v
y
a
w
-
3
:
2
V
S
H
)
y
l
p
p
u
s
d
l
e
if
(t
i
k
y
g
r
e
n
e
r
a
l
o
S
B
)
y
l
p
p
u
s
d
l
e
if
(
k
n
a
t
r
e
t
a
w
t
o
h
c
it
s
e
m
o
d
r
o
f
e
v
l
a
v
y
a
w
-
3
:
1
V
S
I
e
c
a
fr
e
t
n
i
r
e
s
U
C
r
o
t
c
a
t
n
o
C
K
)
y
l
p
p
u
s
d
l
e
if
(
p
m
u
p
r
a
l
o
S
:
s
_
P
E
o
EN
IDOLA M 3.2
04÷16T
CAUTION
34
Ethylene Glycol and Propylene Glycol are TOXIC
WARNING
NOTE
During filling, it might not be possible to remove all air in the system. Remaining air will be removed through the
automatic air purge valves during the first operating hours of the system. Topping up the water afterwards might be
required.
The water pressure will vary depending on the water temperature (higher pressure at higher water temperature).
However, at all times water pressure should remain above 0.3 bar to avoid air entering the circuit.
The unit might drain-off too much water through the pressure relief valve.
Water quality should be complied with EN 98/83 EC Directives.
Detailed water quality condition can be found in EN 98/83 EC Directives.
Connect the water supply to the filling valve and open the valve.
Make sure the automatic air purge valve is open (at least 2 turns).
Fill with water pressure of approximately 2.0 bar. Remove air in the circuit as much as possible using the air purge
valves. Air in the water circuit could lead to malfunction of the backup electric heater.
9.5 Filling water
Do not fasten the black plastic cover on
the vent valve at the topside of the unit
when the system is running. Open air
purge valve, turn anticlockWise at least
2 full turns to release air from the
system.
CounterclockWise rotation, remove the flow switch.
Drying the flow switch completely.
When the unit is not running for a long time, make sure the unit is powered on all the time. If you want to cut off the
power, the water in the system pipe needs to be drained clean to avoid the unit and pipeline system being damaged by
freezing. Also the power of the unit needs to be cut off after water in the system is drained off.
Cod. 3QE47850 - Rev. 00 - 03/2022