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I'm trying to replace my old Horstmann HRT2 with HRT3, the wiring out of the wall is brown to no1, blue to no2 ,earth to no3 nothing in no4. I'm hoping someone can tell me how to wire the new one up I have no diagrams.

If anyone has to apologise its me I can't always do things the same day even the next but I do appreciate all the help.

Thanks for the reply so all I need to do is run a new wire from Hive T1 OFF to the grey wire in the terminal block.

OK no reply about the wiring block so I assumed it doesn't matter so I have installed the hive it works of sorts and I haven't blown anything up.

Sorry for late reply hope this is right?

This is the block

It go's into a block and then changes to white?? looks like a right mess. look at the bottom of the photo

Photos as requested

Sorry was late in from work last night will get a photo today

This is the danfoss 102

There is a cylinder stat where does the grey wire go? In the junction box somewhere

Thank for the reply ill take a photo tonight

Hi I'm trying to wire up a dual hive hot water,central heating controller my Danfoss model 102, and its a three port valve with no room thermostat. Was wondering if there is a wiring diagram for this? Danfoss has a comm terminal which is confusing hive doesn't.