Modifying heating switch

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I have an installation with Sunvic TLX RFP but one of the receivers (2 zone system) has failed. The Rx has 3 connections, L,N and output which goes to a zone valve (and via that to boiler).

I may have bought the wrong replacement. It's receiver has 5 connections as you can see from diagram below. I'm assuming that this is intended for direct connection to boiler, but this won't work for me.
So, I wondered if I could modify to use the relay to feed Live to the output? I hope the attached diagram illustrates what I'm thinking about.
 

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I have an installation with Sunvic TLX RFP but one of the receivers (2 zone system) has failed. The Rx has 3 connections, L,N and output which goes to a zone valve (and via that to boiler).

I may have bought the wrong replacement. It's receiver has 5 connections as you can see from diagram below. I'm assuming that this is intended for direct connection to boiler, but this won't work for me.
So, I wondered if I could modify to use the relay to feed Live to the output? I hope the attached diagram illustrates what I'm thinking about.
Contact a Registered Electrical Contractor (REC) to sort this out for you.
 
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