The system will still be under warranty, he needs to get the installer back to sort him out. Part of the commissioning/benchmark process is to demonstrate and explain the controls to the customer leaving the system setup appropriately for their circumstances.
That’s the issue here, the engineer that’s put it in is saying it’s working correctly but does not seem to be able to answer why the pump runs 24x7 and why call for how water is being made when controls are set to off.
Would be great if an engineer out there could confirm:-
1. Should the central heating pump be running continuously?
2. Should hot water be running when the heating timer is set to off for both water and heating?
My understanding is the call for hot water is made when the timer is set to run and the cylinder thermostat says the water temperature is below the setting set. Call for heating should only happen when the room thermostat setting is above the room temperature and the timer setting is active for the time period. In both cases, W & H are overridden by the timer regardless of the thermostats.
Further more, the heating pump should run when either hot water or heating is called for and not 24x7. Some systems have overrun protection such that for minutes after either hot water or heating is called and then ends the pump will continue to operate to move hot water away from the heat matrix but then after that short period the pump will stop.
The one exception to the above I think is when the boiler low temperature protection is triggered and the boiler fires up to raise the water temperature to protect the system.
I’m not engineer but this is what I understand.
Les
