3
Weather Compensation Kit -
Installation
2 FITTING THE KIT
Notes.
1. A timer should be fitted to the system so that CH will be
switched off when appropriate.
2. The Connector (Frame 1, item C). is prefitted to certain
boilers. Boilers that don't have this fitted are marked with
an * on page 2.
FITTING THE SENSOR
The air sensor should be located on an external wall of the
building to be heated. Fix the sensor to a north/north-east
facing wall to avoid direct radiation from the sun. The air
sensor should be located to avoid any heating effect from the
boiler flue.
To fix the air sensor to the wall, unscrew the sensor box plastic
cover and screw/plug the sensor body to the wall.
Wire a twin core 0.5mm
2
cable from the sensor to the boiler
through a RH grommet located on the underside of the boiler.
Cable length between sensor and boiler should be no greater
than 20m. Note that this connection is protected extra low
voltage. It is not necessary for the person carrying out the
wiring to be approved to Part P of the Building Regulations.
Avoid running this cable alongside mains voltage cables.
WIRING THE WEATHER COMPENSATION KIT TO THE BOILER
1.
Isolate the electricity supply to the boiler.
2.
Remove the boiler front panel (refer to boiler installation
instructions).
3.
Hinge down the control box.
4.
Unclip and rotate the installer connections cover towards
you until it clips into the retention holes.
5.
Connect the wires from the outside sensor into the RHS
two terminals of the 4 way connector. Insert the connector
into the socket marked 'OPENTHERM / WEATHER
COMPENSATION'
6.
Re-assemble in reverse order.
7.
Record your name and today’s date on the enclosed label
and adhere it to the boiler in a position which will be visible
for future inspection.
5
Combi boiler
3 INSTALLER WIRING - HEAT & SYSTEM BOILERS ONLY
When fitting the outside sensor to the Heat or System boiler, refer to the changes required to the S and Y plan wiring on
the following pages.
Heat & System
