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Installation
6720813171 (2016/05)30
Connection to the terminal strip of the boiler
Connect the external pump, if available, (not the pump of the pump
group) to the green PK terminal. The maximum allowed connected
load of the pump = 250 Watts.
Fig. 56 Terminal strip - external heating pump 230 V (connection
colour green)
Connecting the DHW pump
Connect the DHW pump to the grey PS terminal.
The maximum allowed connected load of the pump = 250 Watts.
Fig. 57 Terminal strip - DHW pump 230V (connection colour grey)
Connecting the DHW circulation pump
Connect the DHW circulation pump to the lilac PZ terminal. The
maximum allowed connected load of the pump = 250 Watts.
Fig. 58 Terminal strip - DHW pump 230 V (connection colour grey)
Connecting to the mains
A mains supply of 230 V - 50 Hz is required.
External controls are suitable for volt free installation.
Wiring to the boiler must be in accordance with the current I.E.E.
(BS 7671) Wiring Regulations and any local regulations.
Wiring should be a 3 core PVC insulated cable, not less than 0.75 mm²
(24 x 0.2 mm), and to table 16 of BS 6500.
Connection must be made in a way that allows complete isolation of the
electrical supply such as a double pole switch having 3 mm contact
separation in both poles, or by a three pin connector, serving only the
boiler and system controls. This boiler is equipped with a double pole
switch [1]. The means of isolation must be accessible to the user after
installation.
The electrical connection to the mains supply should be readily
accessible and adjacent to the boiler.
If the supply cord is damaged, it must be replaced by a registered Gas
Safe installer to avoid a hazard and must be an original spare part.
The electrical supply for both the boiler and the system must be taken
from the same fused spur outlet.
Fig. 59 Mains supply
8.5.6 Installing function modules (accessories)
The following function modules (accessories) can be connected to the
boiler:
Heat demand 0-10 V module EM10
Error reporting module EM10
Switch module WM10
Mixing module MM10
Solar module SM10.
Function modules (accessories) can be installed in 2 ways:
in the boiler (max. 2)
outside the boiler.
Both methods are described below.
Determine how the modules have to be installed.
Installing and connecting function modules (accessories) in the
boiler
Loosen the screw [1].
Pull open the draw [2].
Fig. 60 Opening the draw
All Worcester boilers require a permanent live.
DANGER: Danger of fatal accident due to electric shock.
Disconnect the boiler from the mains power supply
before working on the boiler.
PK
6 720 648 726-056.1TD
PS
6 720 648 726-057.1TD
PZ
6 720 648 726-058.1TD
Refer to the installation instructions of the relevant
function modules for information about installation and
combination possibilities.
ON
OFF
6 720 648 726-059.1TD
1
1
2
6 720 648 726-060.1TD
30


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