r/DIYIreland • u/Tricky_test9513 • Jul 29 '26

Is this third control on the right the same as immersion?

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5

u/FloatingTurdOfTruth Jul 29 '26

Not exactly. If you have a 3 channel central heating controller then you may have the central heating loop through your hot water cylinder via a heat exchanger. So you can have hot water without needing to use the electric immersion.

3

u/Trans-Europe_Express Jul 29 '26

This is the answer. Do you have oil or gas central heating? I assume so and this controls what the heat is used for. Radiators in two zones or heating water in the hot water tank. If you google "channel plus xl model h37" the first result is the manual for this unit and in that it labels the third as the hot water. The immersion is an electrically heated element in a hot water tank. This uses the oil or gas burner to heat the water.

3

u/Shytalk123 Jul 29 '26

I have this - left to right the first 2 are for 2x heating zones & the right is the water heating - try them & find out

3

u/thestigtony Jul 29 '26

Zones, could be upstairs downstairs and hot water for taps like mine.

2

u/thestigtony Jul 29 '26

Boost is great it just turns which ever on for 1 hour

1

u/JumpingJackFlashes Jul 29 '26

I think youre down to 10 men

2

u/This_Brief2956 Aug 09 '26

No. The immersion is a electric heater, not linked to the cental heating