Help with hive

[bennettp23]

Back of the hive.

 

[ericmark]

The only time the pump is not switched with the boiler is with thermo-syphon, the Hive thermostat has a special function to work with thermo-syphon but it would be unusual to have two motorised valves with thermo-syphon, but the C Plan has at least 3 versions.

My own system has two motorised valves, and two pumps, and two relays and the DHW is still thermo-syphon.

So it may be we have missed some thing.

 

[bennettp23]

Only one pump. I think it’s the wiring. Im hoping I can just change something in the pics I posted. Directly wire 4 to the pump?

 

[EFLImpudence]

Only one pump. I think it’s the wiring. Im hoping I can just change something in the pics I posted. Directly wire 4 to the pump?

No, 4 to the CH valve.

 

[ericmark]

Only set to gravity can Hive power pump and boiler indepent, the normal is Hive powers the motorised valves which in turn power both pump and boiler.

 

[bennettp23]

No, 4 to the CH valve.

I’ll try that.

No, 4 to the CH valve.

I don’t think I can do that from the boiler interface on these pictures?

 

[bennettp23]

This is the wiring next to the pump and valves but there was wiring to the old thermostat which was removed which I think is the problem - or is there something I can do here?

 

[bennettp23]

And these are the old wires which he cut off in the ceiling.

there is also a control box in the ceiling which is now inaccessible.

 

[bennettp23]

Think I might be onto something here.

old thermostat wiring, cable on left becomes live when calling for heat. Maybe if i join that back to the left cable? Think that is what he cut as well.

 

[bennettp23]

Didn’t work.

Can I hijack one of the cables at the back of the hive boiler controller to get the CH on signal up into the loft?

or do I connect all three wires together that were in the thermostat?

 

[bennettp23]

FYI here is the other control box now in the ceiling (pics taken last year)

 

[bennettp23]

So looks like the cable 4 from the hive controller goes straight to the thermostat and then another cable to the control box in/near the loft. This second cable is the one that was ripped out.

I think i need to run another cable from the hive controller next to the boiler up to the loft control box… bugger.

 

[ianmcd]

just connect the CH on from the hive to the brown wire from the CH zone valve

 

[bennettp23]

There is no wire from the CH up to the valve.

 

[ianmcd]

There is no wire from the CH up to the valve.

That is because the connection used to come via the old room thermostat, just connect as I said, the hive opens the valve, the valve sends power to the boiler and pump not the hive