Heat pump relay help ?

Hiya yes really not sure on this relay side

I assume its a 240 supply to the coil a1 a2 and then 24 volt out ?

its not a voltage out of the relay - its a contact. The 24 volts comes from the heat pump installer.

several relays are made that fit this base. yes, the " A" terminals are the coil drive, in your application the relay needs a 230V coil.

The recommended ones have the following pin-outs.

If somehow you have been sold a unit with 24V coil, itt will indeed go bang when the mains comes on.

The relay part nos can be understood as follows

The key here is the last block of 4 digits called 'coil code'

I agree with Mike Min, it looks like 5230 is the likely one you want. perhaps check the coil resistance prior to switch on next time.

Mike

So the code of the relay the wholesaler sent me which blew is ...

RM84 - 2012 - 35 - 5024

It does say ac 24 volt but also 250 volt on the relay itself 

I would read that as 24V coil, with switch contacts capable of switching 250V.

Yes that is what im thinking 

goldenboy1818 said:

It does say ac 24 volt but also 250 volt on the relay itself 

Sounds like 24V coil and 250V rated contacts ... which would agree with the symptoms,

   - Andy.

Thanks everyone for the help, hopefully that is the issue sorted, will get a new relay.

Really appreciate everyone that helped me 

goldenboy1818 said:

RM84 - 2012 - 35 - 5024

It does say ac 24 volt but also 250 volt on the relay itself 

That part number is a 24V AC coil, and as Simon mentioned, the second voltage is what the contacts are capable of handling.

On a side note, when you are changing the relay out, just check that the base isn't damaged in anyway, normally it should be ok, but it is worth checking.

goldenboy1818 said:

RM84 - 2012 - 35 - 5024

It does say ac 24 volt but also 250 volt on the relay itself 

That part number is a 24V AC coil, and as Simon mentioned, the second voltage is what the contacts are capable of handling.

On a side note, when you are changing the relay out, just check that the base isn't damaged in anyway, normally it should be ok, but it is worth checking.

Thanks Mike, yes il change the base too to be safe