Worcester GB162-65 Installation And Servicing Instruction page 35

CONNECTING THE DHW TEMPERATURE SENSOR
B Connect the DHW temperature sensor to the grey FW
terminal, using the harness enclosed with the DHW
temperature sensor [1].
NOTE:
B This connection is reverse-proof. This
means that it does not matter in which
order the wires are connected.
B It is not possible to connect more than
one DHW temperature sensor in the
boiler. It is only possible to connect a
DHW temperature sensor which is
suitable for this boiler.
Fig. 50 Terminal strip - potential-free heat demand
(connection colour green)
CONNECTING AN EXTERNAL SWITCH CONTACT
A potential-free external switch contact can be
connected. This external switch contact can be used to
safeguard a underfloor heating system so that the
heating water temperature will not become too high etc.
When the external switch contact is opened, the boiler
will be switched off for heating operation and for
domestic hot water operation. The pump continues to
run for the run-over time set on the boiler.
B Remove the cable from the EV terminal.
B Connect the external switch contact to the red EV
terminal.
This connection is reverse-proof. This
means that it does not matter in which order
the wires are connected.
6 720 648 726 (2011/07)
Fig. 51
CONNECTING EXTERNAL 230 V CONTROLS WITH USE
OF THE 230 VOLT CONVERTER (ONLY FOR GB162-65)
The gas wall hung boiler condensing can be fitted with
the following external controls:
• a room-temperature control device at 230 V
1 • ON/OFF temperature controller, volt free.
B Connect the black pre-wired main appliance lead to a
6 720 648 726-050.1TD
B Remove the grey cover of the 230 Volt converter [1].
B Feed the 230 V switch live and neutral (from external
B Identify the 230 V terminal block by the hashed area
B Connect the switch live to terminal "1" and a neutral
Fig. 52
Terminal strip - external switch contact,
potential-free, e. g. for floor heating (connection
colour red)
connected to the room control converter (only for
GB162-65). For connection, see the electrical wiring
diagram supplied with the 230 Volt converter),
WARNING:
B This appliance must be earthed.
permanent live supply (from the same fused isolator
as all other controls on the heating system), L N E.
NOTE:
B Connect the 230 Volt converter (grey
box) via the pair of black low voltage
cable to terminal WA. See figure 48.
controls) through the cable gland.
and 230 VAC warning triangle.
to terminal "2" [2].
NOTE:
B Terminal 3 [2] is not used.
1
Connection box - 230 Volt connection
INSTALLATION
EV
6 720 648 726-051.1TD
2
6 720 648 726-052.1TD
35