Salus RT520 controls

[Langleyhouse]

My father in law had a Vokera Easi Heat 29c combination boiler put in about a year ago,
boiler fine but at the time the gas engineer ( now retired) put in a salus RT520 progam time control
At the time I don't think the engineer knew much about the salus progammer!
Despite setting the times and settings as per the manual, this salus control seems to have a mind of its own and will often come on the wrong times! too early or too late
The Optimize and Optimum feature is set to off , as all he wants is the heating to come on and off at the times he as set on the control.
this a wired control not wireless,
He gets frustrated as he is elderly
Weather the salus has been installed wrong' I don't know, my take on it is to bin the salus and get a honeywell or potterton like what I have and get a decent CH engineer to fit it
Any advice on the above

 

[ianmcd]

The boiler has a small mechanical timer at the bottom right hand corner, this MUST be set to constantly on or it will over ride the Salus

 

[Langleyhouse]

This model does not have any mechanical
timer on the bottom right hand corner

Thanks for your reply

 

[Exedon]

If you intend using it a basically a timed on/off switch you will need to have back set temperatures low enough never to switch on when you want heating off.