Frost Stat Queries

[Rautospoon]

I had a Vaillant ecoTech Plus Open Vent boiler fitted in my loft about 6 months together with replacement Honeywell Frost (set at 3C) and Pipe (set at 20C) stats.
These replaced a 30 year old boiler (Ideal Classic NF40) and identical frost and pipe stats, again in the loft to my bungalow.
My queries are :
1. What could be considered a "normal" time period between the boiler "kicking in" (when the air temperature falls to 3C) and it stopping (when the temperature in the return pipe reaches 20C) and vica versa ?
2. Does the frost stat temperature (3C) or the pipe stat temperature (20C) have priority ?
3. If the CH is "on" and has reached temperature on my Drayton room stat and has turned off, will the boiler still "kick in" if the temperature in the loft falls to 3C ?

I ask as the new boiler seems to come "on and off" more (in the current cold weather) than my previous one.
Many thanks.

 

[Stuckinarut]

All could have varying answers. Are pipes insulated and were they previously? The frost stat and pipe stat should be wired in series (afaik) and will override any other controls. How long would be dependant on how much time it takes to heat up to the required temperature.

 

[Rautospoon]

The pipework in the loft is now well insulated, better than before.
The frost stat are wired in series, does one override the other ?

 

[JayN]

I recently rewired my frost and pipe stats in my cold garage, and tested them by switching off the boiler so the pipes in the garage got cold, then turned the frost stat dial and had the pipe stat set to 20-30degrees IIRC. There was a long lag, pipes got really toasty before the pipe stat switched off the boiler. I was getting worried but in the end, boiler shut off.