Wiring up new room thermostat

Fitzy71:

Hi guys


Hope you’re all keeping well and safe?


I need some help with wire colour identification for my new Flomasta and 6259G wired thermostat.  I have worked on any heating/water installs yet, so I’m not familiar with the wiring colours.  My old analogue Honeywell thermostat has 5 wires, Gn/Y, blue, black, light grey and brown.  The Honeywell is wired 1 gn/y, 2 blue, 3 black, 5 brown, light grey isn’t used.  New flomasta uses only 3 wires, Com, NO & NC, I know the NO & NC means open/closed, but which colour wire goes to which terminal?

Normally manual room thermostats have just three needs. L to Com. Switch L to calling for heat, N to N terminal. Which gas heating wiring system have you S plan or Y plan?  Traditionally Red went to Com. Blue to N and Yellow to switched L.  So now it is probably Brown to L, black sleeved blue to N, and grey (sleeved brown) to switched L.


Z.


 

Fitzy71:

Hi guys


Hope you’re all keeping well and safe?


I need some help with wire colour identification for my new Flomasta and 6259G wired thermostat.  I have worked on any heating/water installs yet, so I’m not familiar with the wiring colours.  My old analogue Honeywell thermostat has 5 wires, Gn/Y, blue, black, light grey and brown.  The Honeywell is wired 1 gn/y, 2 blue, 3 black, 5 brown, light grey isn’t used.  New flomasta uses only 3 wires, Com, NO & NC, I know the NO & NC means open/closed, but which colour wire goes to which terminal?

Normally manual room thermostats have just three needs. L to Com. Switch L to calling for heat, N to N terminal. Which gas heating wiring system have you S plan or Y plan?  Traditionally Red went to Com. Blue to N and Yellow to switched L.  So now it is probably Brown to L, black sleeved blue to N, and grey (sleeved brown) to switched L.


Z.