Hi All,
Am i correct in thinking that setting the controls of my opentherm controller to make the boiler run longer but with lower water temps is more fuel efficient and mechanically better for the boiler than setting it for shorter runs but with higher temp water.
Current set up is
MAx flow temp 65,
Bolier modulates as low as 40.
I can set the controller to make the system never achieve thermostat set point, it will hover around 0.2 to 0.1 deg below set point, but the boiler just keeps running all the time with the water temp at 40 degs. If i increase set point by a degree or 2 it will modulate water temp up to achieve the new room temp. But again maintain it around 0.2 to 0.1 below the new set point and again just keep running at water temp of 40 degs.
Or
I can set to achieve set point easily but boiler will cycle maybe 3 times per hour.
I am using the EPH system and using the modulation setting to achieve this.
Which is best please, the long but lower temp or the higher but shorter runs ?
Thanks,
John
Am i correct in thinking that setting the controls of my opentherm controller to make the boiler run longer but with lower water temps is more fuel efficient and mechanically better for the boiler than setting it for shorter runs but with higher temp water.
Current set up is
MAx flow temp 65,
Bolier modulates as low as 40.
I can set the controller to make the system never achieve thermostat set point, it will hover around 0.2 to 0.1 deg below set point, but the boiler just keeps running all the time with the water temp at 40 degs. If i increase set point by a degree or 2 it will modulate water temp up to achieve the new room temp. But again maintain it around 0.2 to 0.1 below the new set point and again just keep running at water temp of 40 degs.
Or
I can set to achieve set point easily but boiler will cycle maybe 3 times per hour.
I am using the EPH system and using the modulation setting to achieve this.
Which is best please, the long but lower temp or the higher but shorter runs ?
Thanks,
John