5.2 Wiring for a boiler that requires a
permanent live (a typical Combi boiler).
This can be used for boilers with low voltage
or 230Vac room thermostat inputs. Please
check manufacturer’s instructions.
EN
|
Installation Guide
Note: the plugs and
mounting screws
are supplied.
1. Disconnect the mains power from
the Heating Appliance.
To ensure your safety, always make sure mains
power is switched off before accessing wiring.
3. Mount the wiring plate
to the wall or wallbox.
4. Connect the Boiler Relay wiring.
2. Remove the wiring plate from the Boiler Relay.
Step 1
Use a
screwdriver to
unclip the cover
from base.
Step 2
Hinge the cover
upwards to remove.
5.1 Wiring for a basic boiler (not
requiring a pump overrun).
The Boiler Relay powers the boiler live input.
230V
50-60Hz
<5A
N L
N L
L
BDR91
Place link here
A-B:5(3)A
A-C:5(3)A
A B C
L
N
Installation Instructions
Power supply
from
fused spur
To heating appliance
1,5-2,5 mm
2
max 6 mm
>7 mm 0
<7 mm 0
Place link here
230V
50-60Hz
<5A
N L L
BDR91
A-B:5(3)A
A-C:5(3)A
A B C
L
N
N L
5.3 Wiring for a two-port zone valve.
230V
50-60Hz
<5A
N L L
BDR91
V4043H
A-B:5(3)A
A-C:5(3)A
A B C
L
N
BL BR
M
GR O
G
/
Y
G/Y: Green/Yellow
Earth wire
BL: Blue Motor
Neutral
BR: Brown Motor Live
GR: Grey End
switch (if used)
Permanent Live
O: Orange End
switch (If used).
In wired system
this typically
feeds the boiler.
7. Reconnect the mains power to
the Heating Appliance.
8. Locate the thermostat.
• Away from draughts
• Away from heat sources
• Away from direct sunlight
• Positioned about 1.2m – 1.5m from the floor
6. Attach the Boiler Relay to the wiring plate.
Step 1
Locate hinges
Step 2
Hinge the cover
downwards and
click into place.
10. Unclip the mounting plate.
Press the top of the
thermostat downwards, pull
it loose and tilt forwards.
9. First remove the dial.
12. Remove the protective tab
between the batteries.
11. Mount directly to the wall.
The plugs and mounting
screws required
are supplied.
Plugs
Screws
14. Replace the dial.
13. Attach the
thermostat to the
mounting plate.
Step 1
Locate hinges
Step 2
Hinge upwards
and click
into place
32300951-013 B
Y87RFC
Connected Single Zone Thermostat
Please refer
to wiring
diagram
(right).
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