We’ve recently had a new heating system installed. The boiler is an external wall mounted Grant Vortex Eco. The system was plumbed S plan using 2 Honeywell V4043H1056 zone valves.
The Evo components are the Wireless Connected Control Pack (AC928 & BDR91) and the Hot Water Kit (CS292 & BDR91) . All except 2 small radiators (porch and bathroom which I was content to allow to come on with any CH demand) are fitted with HR80 or HR92 (a mix).
The electricians who were unfamiliar with the Evo system had problems. While all the Radiator valves were communicating with the Central Controller, a call for CH did not turn on the BDR91 for CH. There was also a strange condition where the green lights on both BDR91s were off but the boiler and pump ran and the CH valve stayed open.
They left the job at this stage and apparently consulted Honeywell before returning. They have since made two visible changes. One was to move one of the relays they fitted – I guess this is just for reasons of signal – they were only about 5cm apart before. The other is that they have disconnected the CH zone vale and locked it open. The BRD91s now seem to work #1 to control the boiler and #2 to open the zone valve on the HW circuit. I’m not over happy with this as the 2 small rads come on with both CH and HW demands.
The only comment I picked up was something about the zone valves being incompatible with the S Plan but I can’t figure that out as the S Plan wiring diagram in the Evo installation manual shows 2 x V4043H. The only difference I’ve spotted between what we have and that diagram is that our boiler needs a permanent live.
Can someone advise me. Is it impossible to have our system using S Plan or what components would need changing to achieve this?
The Evo components are the Wireless Connected Control Pack (AC928 & BDR91) and the Hot Water Kit (CS292 & BDR91) . All except 2 small radiators (porch and bathroom which I was content to allow to come on with any CH demand) are fitted with HR80 or HR92 (a mix).
The electricians who were unfamiliar with the Evo system had problems. While all the Radiator valves were communicating with the Central Controller, a call for CH did not turn on the BDR91 for CH. There was also a strange condition where the green lights on both BDR91s were off but the boiler and pump ran and the CH valve stayed open.
They left the job at this stage and apparently consulted Honeywell before returning. They have since made two visible changes. One was to move one of the relays they fitted – I guess this is just for reasons of signal – they were only about 5cm apart before. The other is that they have disconnected the CH zone vale and locked it open. The BRD91s now seem to work #1 to control the boiler and #2 to open the zone valve on the HW circuit. I’m not over happy with this as the 2 small rads come on with both CH and HW demands.
The only comment I picked up was something about the zone valves being incompatible with the S Plan but I can’t figure that out as the S Plan wiring diagram in the Evo installation manual shows 2 x V4043H. The only difference I’ve spotted between what we have and that diagram is that our boiler needs a permanent live.
Can someone advise me. Is it impossible to have our system using S Plan or what components would need changing to achieve this?
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