Description Of The Terminal Strip Connections - Worcester GB162-65 Installation And Servicing Instruction

8.5.4 DESCRIPTION OF THE TERMINAL STRIP
CONNECTIONS
B Connect all components to the relevant terminals.
DANGER: Danger of fatal accident due to
electric shock.
Items 1 – 6 are low-voltage connections and
items 7 – 10 are 230 V-connections
( fig. 42).
B Please be aware that there may be a
voltage on items 7 – 10 (230 V), when
power is supplied to the boiler.
FA FW DWV
RC WA EV
1 2 3 4 5 6
Fig. 42 Terminal strip connections
1 Room controller RC and EMS bus (connection colour
orange)
2 Outdoor-temperature sensor (connection colour blue)
3 Connection terminal for potential free heat demand
(connection colour green)
4 DHW temperature sensor (connection colour grey)
5 External switch contact, potential free, e. g. for floor heating
(connection colour red) (thermal protection)
6 Connection for external three-way valve
7 External heating pump 230 V (connection colour green) (for
use with non Worcester pump group)
8 DHW pump 230 V (connection colour grey)
9 DHW Circulation pump 230 V (connection colour lilac)
10 Mains connection 230 V AC (connection colour white)
GENERAL CONTROL CONNECTION
The following controls can be connected to the boiler.
• Control with contact for potential free heat demand
• RC25, RC35 room controller
• 4121, 4122, 4323 cascade controller
• Error reporting module EM10, 0 – 10 V input (can be
used to convert a 0 – 10 V signal to a modulating
signal).
CONNECTING AND INSTALLING A MODULATING
CONTROL (ROOM CONTROLLER)
It is NOT possible to connect more than one
room controller (
6 720 648 726 (2011/07)
Mains
PK PS PZ 230 V
7 8 9 10
6 720 648 726-042.1TD
fig. 43).
RC WA
Fig. 43 Terminal strip – RC room controller and
WA potential-free heat demand
INSTALLING AN RC35 ROOM CONTROLLER AS AN
OUTDOOR TEMPERATURE-DEPENDANT CONTROL IN
THE BOILER
For outdoor temperature-dependant control operation
only: it is possble to install the room controller (e.g.
RC35) in the boiler. In this case, the controller does not
have to be connected to the terminal strip afterwards.
If you would like to use this room controller for room
temperature-controlled operation, the room controller
must be installed in a living room.
B Push the arrow on the control panel cover to open
( fig. 44).
Fig. 44 Opening the control panel
B Remove the cover [1].
B Install the RC35 in the slot [2].
Fig. 45 Remove the cover and install the room controller
in the boiler (only for outdoor temperature-
dependant operation)
INSTALLATION
6 720 648 726-043.1TD
6 720 648 726-044.1TD
1 2
6 720 648 726-045.1TD
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