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Worcester-Bosch Greenstar Comfort II RF - 2014-2022 Manual

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5
Comfort II RF installation
Comfort II– 6720810965 (2014/07)
2.2 Receiver
This unit is only used in conjunction with the Programmable
room thermostat.
The unit can be mounted in the boiler fascia, refer to your boiler
Installation, Commissioning and Servicing instruction manual
for fitting instructions.
The unit can also be wall mounted and hard-wired to the boiler
via the EMS BUS connections.
Fig. 2
[1] Fault indicator/Pairing indicator
[2] Override button/Pairing button
3 Comfort II RF installation
Refer to the boiler’s Installation, Commissioning and Servicing
instruction manual for information on the boiler.
Refer to this manual for detailed information on installing and
using the Comfort II RF.
A brief overview of the Comfort II RF installation procedure is
listed below:
▶ Isolate the boiler
▶ Remove any panels or casings required to gain access to
the control panel
▶ Mount the Receiver (boiler fascia or a suitable wall location
using the optional Wall Mounting Plate Kit, this will require
wiring between the boiler EMS BUS connections and Wall
Mounting Plate)
▶Turn the boiler on
▶ Insert batteries in the Programmable Room thermostat
▶ Set time and date on the Programmable room thermostat
▶ The units will automatically connect to each other
▶ Ensure that the signal strength is adequate at the
Programmable room thermostat before mounting in a
suitable reference room Section 5.1.4 Info - Signal
strength on page 12
The Comfort II RF Programmable room thermostat consists of
two units: the Receiver that mounts into the boiler fascia or,
with an optional wall mounting kit, onto the wall and the
Programmable room thermostat which mounts on a wall in a
suitable reference room
3.1 Receiver mounting
There are two methods of mounting the Receiver:
• In the boiler fascia
• On the wall (optional wall mounting kit 7 733 600 039)
If your boiler is mounted remotely i.e. in the loft or an
outbuilding, you may want the Receiver to be conveniently
located for easy access
Boiler fascia mounted
Refer to your boiler’s Installation, Commissioning and Serving
instruction manual for mounting the Receiver into the boiler
fascia.
Wall mounted
Choose a convenient wall location, approximately 1.2 metres
from the floor, to mount the Timer.
The Receiver is a radio frequency (RF) device and as such is
flexible for positioning.
EMS connection
Run a two core cable from the boiler to the Receiver location.
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.
CAUTION: Mains supplies
▶ Isolate the mains supplies to the boiler
before starting any work, and follow all
relevant safety precautions
6720810965-15.1Wo
1
2
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
… 5 …


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