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Wiring up new room thermostat

Former Community Member over 4 years ago

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?

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0 OlympusMons over 4 years ago

Sorry for all the questions Fitzy, but i am still a bit concerned about your shower mixers. Can you post a photo of one please. It does sound like your mains pressure is low, which makes me wonder why bother installing an un-vented cylinder which relies on good mains pressure to feed all the hot water outlets, even though there is a pressure limiting valve fitted.
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0 OlympusMons over 4 years ago

Sorry for all the questions Fitzy, but i am still a bit concerned about your shower mixers. Can you post a photo of one please. It does sound like your mains pressure is low, which makes me wonder why bother installing an un-vented cylinder which relies on good mains pressure to feed all the hot water outlets, even though there is a pressure limiting valve fitted.
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Wiring up new room thermostat

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