11
INSTALLATION AND OPERATION MANUAL
• CIRCUIT DIAGRAM OF THE BOILER
• An electric installation with earthing, in accordance with the electric safety regulations in force, is to be installed when
connecting the electric part of the boiler.
Protect the isolation of the mains cable against damage.
• CONNECTION OF THE CIRCULATION PUMP
In order to insure a continuous flow of water, a circulation pump is to be installed in the system, on the return water pipe
behind the mixing valve. The electronic controller of the boiler controls the pump. The circulation pump is connected to
1
2
N
3
L
4
L1
5
L1
6
L14
7
8
9
N
10
L3
11
N
12
L4
L1
N
L2
L3
L4
M2
P
N
L
P
N
L
P
N
L
X4
X2
X1
P
L
N
L2
L14
L1
L
U
1
U
3
U
2
KR-4.4
S1
S2
SK
F
220 V
2
N
L
2A
2B
3
1
2
X3
1
1A
1B
3
1 2
1
C
J
M1
P
L
N
L5
Fig. 6 Circuit diagram of the boiler
S1 - power supply switch; S2 – fan switch; SK – emergency ventilator shutdown 95°C thermostat; F - fuse; M1 - smoke exhaust fan;; M2 - air
supply fan; J - socket of a circulation pump of the heating system; KR – electronic controller; U
1,2
- water temperature sensors; U
3
- smoke
temperature sensor.
