S-CB
+
Boiler Range Manual
37
9
ELECTRICAL INSTALLATION
9.1 General
All the wiring is connected to a separate connector that is fitted in a socket. The connector can be taken from the
sockets without loosening the wiring. The connections are placed on top of the display panel and can be accessed
by removing the boiler front door and the connector protection cover.
For operation the boiler needs a power supply of 230 Vac 50Hz.
The boiler connections are not life/neutral sensitive (the boiler is not phase-sensitive).
The wiring for the connections can be entered at the bottom of the boiler through the cable glands.
NOTICE: Before starting to work on the boiler, it must be switched off and the power supply to the boiler
must be disconnected.
Electrical wiring should be installed according to all applicable standards and regulations.
Working on the boiler should only be done by a qualified service engineer that is skilled in working on elec-
trical installations and according to all applicable standards.
9.2 Electrical connections
16
15
14
13
6
5
4
3
2
1
7
8
9
10
11
12
17
18
34
33
32
27
26
25
21
20
19
22
23
24
28
29
30
31
9.3 Explanation of the connections
1-2
OUTDOOR SENSOR
When an outdoor temperature sensor is connected, the boiler will control the flow water temperature
by using a calculated setting, which is relative to the outdoor temperature.
PARAMETER: No parameter settings needed.
3-4
EXTERNAL FLOW SENSOR
When a low loss header is used, this sensor measures the flow temperature at the system side. The
sensor must be mounted on the supply pipe at the system side, just behind the low loss header. NO-
TICE: The sensor must be used when boilers are cascaded with the internal cascade manager.
PARAMETER: No parameter settings needed.
5-6
CALORIFIER SENSOR or THERMOSTAT
When an indirect hot water tank / calorifier is installed, a hot water sensor must be connected to these
terminals. In case of a DHW heat demand, the set point will be shown in the display. An external on/off
thermostat can also be connected to these terminals. When there is heat demand (terminals 5 and 6
are bridged) the flow temperature going to the heating coil(s) will be shown in the display.
OUTDOOR
SENSOR
EXTERNAL
FLOW
SENSOR
CALORIFIER
SENSOR
or
THERMOSTAT
GENERAL
BLOCKING
EMPTY
EXTERNAL
WPS
On/Off Stat
or Open
Therm Hea-
ting Circuit
+ -
0
– 10
VDC
A B
CASCADE
CONNECTION
LOCK-OUT
N.O.
BURNER
BURNING
N.O.
HEAT
DEMAND
N.O.
CH System
Pump P3
Diverter Valve Calorifier
Calorifier Pump P2
Mains 230 VAC
CONNECTIONS
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