Help wiring Smart thermostat (Myson MPRT - Tado)

[Hammy193]

I need some assistance understanding which wire from my current thermostat Myson MPRT which has two wires. There are no labels on this thermostat and I'm supposed to put the wires in the COM and NO connections.

The MPRT instructions are no help either https://www.myson.co.uk/static_files/my/media/downloads/MPRT_Hard_Wired_Instalation_Instructions.pdf

They just show terminals 2 and 3 being used but don't state which wire in terminal 2 or 3 would be L or SL or COM or NO which would then assist me to put the two wires into the right Tado terminals.

Is anyone able to tell me which wire is which?

 

[Chunky19]

It’s just a simple switch. You can put your two wires in either way round. It makes no difference they just get connected together on Call for Heat.

 

[RandomGrinch]

my current thermostat Myson MPRT which has two wires.

Your hardwired MPRT is battery operated, but has two control wires to the boiler.
Can you post a picture of the wiring behind the thermostat and tell us what boiler you have?
There may not the Line and Neutral wires that you require to power the Tado.

 

[Hammy193]

The Myson MPRT thermostat connects to a Baxi assure 30 combi boiler.

There are 3 batteries in the thermostat. Tado also has batteries to power the thermostat. I am hoping I can connect the two wires in the Myson thermostat to the NO and COM connections as shown in the Tado manual. Let me know your thoughts.

 

[RandomGrinch]

I can connect the two wires in the Myson thermostat to the NO and COM connections as shown in the Tado manual. Let me know your thoughts.

For a (battery operated) Smart Wired Tado - then as @Chunky19, your two wires would connect to NO and COM.

Just to add, although the MPRT is battery operated, it could still be switching mains voltage. Isolate the boiler power, before rewiring.