My system uses a Honeywell ST699 programmer which is working fine. but there is only a two way valve employed which limits the flexibility a bit.
I have just purchased an ACL Drayton cylinder thermostat and would like to use it in the following way.
Presently the timer simply provides 240Volt mains to start the boiler, and also another seperate 240Volt supply to the 2 way valve motor when hot cylinder water is selected either via the timer switch or manually by pressing the button on the bottom slider.
The new cylinder thermostat has a pair of normally open and a pair of normally closed contacts, and my idea is simply to interupt the 2 way valve supply, and feed the live conductor via the thermostat normally closed contacts.
This will mean that until the tank water reaches the required temperature the programmer will still control the valve condition but at the preset point the supply will be opened giving the system both timed and temperature control for the hot water.
I am a fully qualified long term electronics engineer and know it will work, but would like to know from the plumbing point of view could it cause any problems.
The timer unit is easily accessed in the airing cupboard, as is the valve motor feed wiring, making it about an hours job, rather than tearing up the bedroom floor boards to fit a different valve.
Regards Ravel.
I have just purchased an ACL Drayton cylinder thermostat and would like to use it in the following way.
Presently the timer simply provides 240Volt mains to start the boiler, and also another seperate 240Volt supply to the 2 way valve motor when hot cylinder water is selected either via the timer switch or manually by pressing the button on the bottom slider.
The new cylinder thermostat has a pair of normally open and a pair of normally closed contacts, and my idea is simply to interupt the 2 way valve supply, and feed the live conductor via the thermostat normally closed contacts.
This will mean that until the tank water reaches the required temperature the programmer will still control the valve condition but at the preset point the supply will be opened giving the system both timed and temperature control for the hot water.
I am a fully qualified long term electronics engineer and know it will work, but would like to know from the plumbing point of view could it cause any problems.
The timer unit is easily accessed in the airing cupboard, as is the valve motor feed wiring, making it about an hours job, rather than tearing up the bedroom floor boards to fit a different valve.
Regards Ravel.
