Another new self-install Evohome user here. Having been inspired by the PC Pro review I completed the Honeywell on-line training course and purchased a system.
My system is S-Plan with HTG and DHW 2-way zone valves, gas boiler and pump. I have wired exactly as per S-Plan diagram (Figure 9) in the installation guide.
I have 14 radiators in 10 zones controlled by HR92s, the living room has a TR87RF thermostat.
The system is set up on the bench for testing and works as it should.
I am wanting to add an additional zone to control a self-regulating electric underfloor heating mat. This is switched by a low voltage contact closure.
My plan was to add a DTS92 thermostat and BDR91 relay box. I have added this as an additional zone, binding the BDR91 as a ‘zone valve’. However, when this zone calls for heat both the HTG BDR91 and additional zone BDR91 switch on together. The HTG BDR91 switches on its own when a HR92 calls for heat.
Any help as to where I have gone wrong in setting this up would be appreciated.
My system is S-Plan with HTG and DHW 2-way zone valves, gas boiler and pump. I have wired exactly as per S-Plan diagram (Figure 9) in the installation guide.
I have 14 radiators in 10 zones controlled by HR92s, the living room has a TR87RF thermostat.
The system is set up on the bench for testing and works as it should.
I am wanting to add an additional zone to control a self-regulating electric underfloor heating mat. This is switched by a low voltage contact closure.
My plan was to add a DTS92 thermostat and BDR91 relay box. I have added this as an additional zone, binding the BDR91 as a ‘zone valve’. However, when this zone calls for heat both the HTG BDR91 and additional zone BDR91 switch on together. The HTG BDR91 switches on its own when a HR92 calls for heat.
Any help as to where I have gone wrong in setting this up would be appreciated.
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