I hope someone may bring some quiet to our home.
Our plumber recently exchanged our aged Honeywell analogue thermostat for a DT90E. Hurrah we thought, we know what the temperature actually is, and we can set the heating accurately.
All settings are factory.
Heating is on.
Set temperature is 21.5
Room temperature is 21.5
Every 10 minutes (presumably from cycle rate 6) the thermostat clicks. Flame appears, boiler fires up.
1 minute later (minimum on/off time 1 minute) it clicks again. Flame disappears, boiler shuts down.
Repeat until I change the Set temperature to 16.0 and the clicking finally stops (Proportional Band width >1.5)
Is this correct behaviour for the unit?
This is the second unit the plumber has fitted.
Maybe for many people the constant clicking is not noticeable.
Before I get the plumber back again, would someone tell me if it is working correctly?
Any advice to reduce the clicking to a simple 'it's cold start the boiler / it's warm shut it down' type clicks greatly appreciated.
Our plumber recently exchanged our aged Honeywell analogue thermostat for a DT90E. Hurrah we thought, we know what the temperature actually is, and we can set the heating accurately.
All settings are factory.
Heating is on.
Set temperature is 21.5
Room temperature is 21.5
Every 10 minutes (presumably from cycle rate 6) the thermostat clicks. Flame appears, boiler fires up.
1 minute later (minimum on/off time 1 minute) it clicks again. Flame disappears, boiler shuts down.
Repeat until I change the Set temperature to 16.0 and the clicking finally stops (Proportional Band width >1.5)
Is this correct behaviour for the unit?
This is the second unit the plumber has fitted.
Maybe for many people the constant clicking is not noticeable.
Before I get the plumber back again, would someone tell me if it is working correctly?
Any advice to reduce the clicking to a simple 'it's cold start the boiler / it's warm shut it down' type clicks greatly appreciated.