CH/boiler - impact of being turned on & off by room stat

[MickOC]

Does anybody know what impact turning on and off the boiler numerous times each day will have on a boiler's life-span?

Assume it must be minimal as that is what the room stat is supposed to do?

 

[londonboy]

Wont make any difference to the boiler, my stat must turn it on and off 20 times a day to regulate at 20 degrees.

 

[electronicsuk]

I assume you're talking about an older boiler where the entire supply is switched, rather than newer models where there is a permanent supply and a switched call for heat?

 

[MickOC]

Yep I guess so, my boiler is probably over 10 years old, Wallstar HRM Oil boiler.

http://www.hrmboilers.co.uk/technical_hrmboilers.html

Before fitting a wireless programmable room stat we used to leave it on all day. So just wondered if turning off and on would have a detremental affect.

 

[MickOC]

Just checked the HRM 12/15 manual and there is a switched live and perm live. Does this mean the Room stat (CMT927) Live should be wired to switched L?

 

[MickOC]

Ignore above I'm guessing switched lived is oragnge from V4073A to HRM ( 8 on Y plan block)

 

[Agile]

The room stat should be wired into the wiring centre and the orange from the motor valve does the actual provision of the call for heat on its orange wire which should be connected to the switched live on the boiler.

Tony