Hi,
Not sure if this is a new fault or indeed a fault at all. ive changed the time when our hot water comes on from an early morning time to an evening time due to a change in work shift pattern.
When the system starts up on hot water for the first 30 minutes it works fine and the boiler settles down to a very low modulation rate. As the cylinder approaches 60 degrees however, the boiler begins to short cycle. It will fire up at about 58 degrees flow temp and within 20 seconds it's achieved 72 degrees which is the boiler thermostat setting at present. It then shuts down and doesn't fire back up until 58 degrees again. It continues to do this until the cylinder stat is satisfied. I've measured the flow and return temps with clamp on thermometers and when it starts cycling, the flow and returns are around the exact same temperatures - no differential at all. There are no manual valves on the hot water pipework, it's straight from the 2 port valve up to the cylinder and then back down to the boiler.
System is a British gas 330 at 24kw, s plan.
As I have changed the times then obviously I am noticing this behaviour as I'm awake whilst it's doing it, but I suppose it probably was doing this when the time was set to early mornings too.
Anything to worry about or is this normal behaviour?
Not sure if this is a new fault or indeed a fault at all. ive changed the time when our hot water comes on from an early morning time to an evening time due to a change in work shift pattern.
When the system starts up on hot water for the first 30 minutes it works fine and the boiler settles down to a very low modulation rate. As the cylinder approaches 60 degrees however, the boiler begins to short cycle. It will fire up at about 58 degrees flow temp and within 20 seconds it's achieved 72 degrees which is the boiler thermostat setting at present. It then shuts down and doesn't fire back up until 58 degrees again. It continues to do this until the cylinder stat is satisfied. I've measured the flow and return temps with clamp on thermometers and when it starts cycling, the flow and returns are around the exact same temperatures - no differential at all. There are no manual valves on the hot water pipework, it's straight from the 2 port valve up to the cylinder and then back down to the boiler.
System is a British gas 330 at 24kw, s plan.
As I have changed the times then obviously I am noticing this behaviour as I'm awake whilst it's doing it, but I suppose it probably was doing this when the time was set to early mornings too.
Anything to worry about or is this normal behaviour?