Hello,
We have a problem with the CH in our 5 year old Barratt house.....i've tried for weeks to track the problem down but i'm totally stuck now....i'd be grateful if anyone can help me out.
The boiler is a 'Potterton Suprima 40' (with the temperature knob set to about 70%), the programmer is a 'Potterton Mini Minder E', there's a single room thermostat downstairs, and a cylinder mounted thermostat (set to 60 deg). There's a single Myson pump and a Myson 3-way valve and attenuator. I'm assuming the hot water cylinder is gravity fed by a tank in the loft and the water is heated by the pumped loop which gets diverted to the radiators by the room thermostat. I know very little about plumbing and have tried to read up as much as possible in order to solve the problem before the weather starts to get really cold....but to no avail.
The problem is that when the temperature of the cylinder has reached the required level, the CH never comes on i.e. no pump and no diverter movement. As soon as the water in the cylinder needs heating (say, when i run a hot tap for a while), the motor kicks in and the 3-way valve goes to the correct position. I replaced the valve actuator but this didn't fix it. I put a multi-meter on the actuator input wires and the CH 'ON' doesn't seem to go live when the HW 'OFF' is live....but as soon as the HW 'ON' goes live the CH 'ON' comes on (if the room thermostat is turned up).
Is this a problem with the programmer perhaps? It's worse at night when the hot water cylinder has reached its temperature and we want some heat on but it just wont fire up the pump. Any ideas? Any help will be much appreciated.
thanks,
Bill.
We have a problem with the CH in our 5 year old Barratt house.....i've tried for weeks to track the problem down but i'm totally stuck now....i'd be grateful if anyone can help me out.
The boiler is a 'Potterton Suprima 40' (with the temperature knob set to about 70%), the programmer is a 'Potterton Mini Minder E', there's a single room thermostat downstairs, and a cylinder mounted thermostat (set to 60 deg). There's a single Myson pump and a Myson 3-way valve and attenuator. I'm assuming the hot water cylinder is gravity fed by a tank in the loft and the water is heated by the pumped loop which gets diverted to the radiators by the room thermostat. I know very little about plumbing and have tried to read up as much as possible in order to solve the problem before the weather starts to get really cold....but to no avail.
The problem is that when the temperature of the cylinder has reached the required level, the CH never comes on i.e. no pump and no diverter movement. As soon as the water in the cylinder needs heating (say, when i run a hot tap for a while), the motor kicks in and the 3-way valve goes to the correct position. I replaced the valve actuator but this didn't fix it. I put a multi-meter on the actuator input wires and the CH 'ON' doesn't seem to go live when the HW 'OFF' is live....but as soon as the HW 'ON' goes live the CH 'ON' comes on (if the room thermostat is turned up).
Is this a problem with the programmer perhaps? It's worse at night when the hot water cylinder has reached its temperature and we want some heat on but it just wont fire up the pump. Any ideas? Any help will be much appreciated.
thanks,
Bill.