Swapping Existing Wireless Thermostat Receiver for Hive Receiver on Combi Boiler

31 Jan 2015
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United Kingdom
Should be a simple question hopefully.

I want to swap my existing Honeywell BDR91 wireless thermostat receiver on my combi boiler for the Hive receiver.

Existing receiver color scheme:

New Hive receiver:

All I want to know is which terminals to connect each of the 4 wires to in the Hive receiver. I know the boiler end of the wiring is fine and my boiler is already set to constant as my existing receiver works just fine.
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Using the existing color scheme of the wires in my first photo, should it be:

Black wire to N on Hive back plate
Brown wire to L on Hive back plate
Grey wire to Com 1 on Hive back plate
Yellow/Green wire to Com 3 on Hive back plate

So essentially:

N on BDR91 to N on Hive
L1 on BDR91 to L on Hive
A on BDR91 to Com 1 on Hive
B on BDR91 to Com 3 on Hive
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Apply some brown sleeving or insulation tape to that green/yellow wire, it’s bad practice to use what is commonly used as an earth wire.
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