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Hi all
Hope someone can give me some advice. We have a hardwired Honeywell ST699 24hr programmer in the airing cupboard. This controls the on/off times of the water/heating.
When we had the bolier replaced, plumber kept the Honeywell controls and also installed a Siemens wireless RDJ10RF temperature thermostat in the hallway.
What I do not understand is that the Siemens controller has on/off times that can be user set. Won't these timings conflict with the timings on the Honeywell controls? eg Honeywell says heating on 5am / off 9am, Siemens says on 6am / off 10am; which one will dominate?
What is the correct way to set the controls on both devices so that one becomes the "master" ?
Hope someone can give me some advice. We have a hardwired Honeywell ST699 24hr programmer in the airing cupboard. This controls the on/off times of the water/heating.
When we had the bolier replaced, plumber kept the Honeywell controls and also installed a Siemens wireless RDJ10RF temperature thermostat in the hallway.
What I do not understand is that the Siemens controller has on/off times that can be user set. Won't these timings conflict with the timings on the Honeywell controls? eg Honeywell says heating on 5am / off 9am, Siemens says on 6am / off 10am; which one will dominate?
What is the correct way to set the controls on both devices so that one becomes the "master" ?