Installation Guide
Single Zone Thermostat
Y87RF
Installation instructions
1.Disconnect the mains power from the Heating Appliance.
To ensure your safety, always make sure mains power is switched off before accessing wiring.
2.Remove the wiring plate from the Boiler Relay.
2.1Carefully press a screwdriver into the opening until the cover comes free.
2.2Tilt the cover upwards and remove it.
3.Mount the wiring plate to the wall or wallbox.
Note: the plugs and mounting screws required are supplied.
4.Connect the Boiler Relay wiring.
Please refer |
To heating appliance |
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to wiring |
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diagram |
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1,5-2,5mm2 |
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(right). |
<7mm 0 |
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>7mm 0 |
max 6mm |
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Power |
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supply from |
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fused spur |
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5.1 Wiring for a basic boiler (not requiring a pump overrun).
The boiler relay powers the boiler live input.
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Place link here |
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BDR91 |
A-B:5(3)A |
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A-C:5(3)A |
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230V |
N L L A |
B C |
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50-60Hz |
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<5A |
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L |
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N |
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N |
L |
5.2 Wiring for a boiler that requires a permanent live.
For use with a boiler that requires a permanent live (a typical Combi boiler wiring). This can be used for boilers with low voltage or 230Vac room thermostat inputs. Please check manufacturer’s instructions.
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BDR91 |
A-B:5(3)A |
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A-C:5(3)A |
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230V |
N L |
L A |
B C |
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50-60Hz |
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<5A |
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L |
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N |
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N |
L |
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