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Worcester-Bosch Greenstar Comfort I RF - 2023 Manual

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Installation
Comfort I – 6720810964 (2017/02)
Programmer/boiler connection
The Comfort I RF connects to your boiler’s EMS BUS
connections.
Run a two core cable from the boiler to the Programmer.
Use an electrical cable with a minimum rating of H05VV-F.
For cable runs up to:
▶ 100 metres, use 0.50mm2 conductor cross sectional area
▶ 300 metres, use 1.5mm2 conductor cross sectional area
Connect the cable to the EMS bus point connections on the
boiler control circuit board, refer to the Installation,
Commissioning and Servicing instruction manual for your
boiler to locate the EMS connections.
Optional wall mounting kit
Using the wall plate as a template, mark the position of the
mounting screws.
The optional wall mounting kit contains:
• 2 x countersunk screws
• 2 x plastic wall plugs
• Wall plate
•Top retainer
▶ Drill two holes to suit the size and depth of the wall plugs
▶Fit the wall plugs
▶ Feed the two core cable through the back of the wall plate
▶ Fit the wall plate [1], ensuring that it is level and tighten the
screws to secure
▶ Connect the two core cable to the terminal block, one core
to each outer connection, ignore the middle connection
Fig. 3 Suggested Programmer wall plate mounting
▶ Engage the four clips on the back of the Programmer [2]
with the four slots on the wall plate as shown in figure 4
▶ Push the Programmer down into the wall plate to secure
▶ Engage the tabs on the top retainer [3] into the slots on the
wall plate [1] and push down onto the Programmer
Fig. 4 Fitting Timer to wall plate assembly
NOTICE: EMS Connections
▶The Programmer must NOT be
connected to the boiler’s 230 volt
supply or an external 230 volt supply.
▶ Ensure that the EMS cable is at least
100mm away from any power cables to
eliminate any mains interference
▶ EMS connections are not polarity sensitive
The Comfort I RF connects to your boiler’s EMS
BUS connections only, on an edge connector
identified either with B B or .
6720810964-24.1Wo
6720810964-25.1Wo
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