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The second pic is obviously terminal block M5. But I am unable to idnttify the first pic, with three terminals and two black wires. To which...
Look again at fig 39. You willl see that the only 240v connections betwwen M3 and M4 are for the clock motor (M). The other terminals on fig 39...
The Unica 36HE appears to require a volt-free thermostat (see page 27 of Installation Manual). So the Honeywell T6360B would not be suitable as it...
There are several version of the 36HE combi boiler. Which one do you have? It will say on the user or installation manual. The Gas Council (GC)...
What is the model number of the Honeywell Programmer?
There are four versions of the T80si - 7.5kW, 8.0kW, 8.5kW and 9.5kW. There should be a label on the underside of the shower giving the rating. If...
I thought of the same thing, particularly as there is a connector between the new valve and the junction box. Separate the connector and check...
These four diagrams show the status of a mid-position valve when: Calling for hot water (DHW) Calling for CH and DHW Calling for CH only When CH...
Thanks for the pics. The wiring centre is a bit of a muddle! Do you have a multimeter and know how to use it?
The connection to the boiler does not look very healthy. The pipe leaving the boiler is twisted and misshapen. It will have to be replaced by a...
Can you post a close up pic of the heating box (aka wiring centre) with the lid off? (Take care: 240Vac present.) Another pic showing the boiler...
Fernox claim that their device converts Calcite (the normal form of Calcium Carbonate) into Aragonite. They both have the same chemical formula...
The manufacturers of "electronic" and "electrolytic" water conditioners all say that the are not water softeners. All they do is "condition" the...
The grey wire, which holds the valve open when HW is satisfied or not required, is fed from two places: programmer HW OFF or cylinder stat...
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