Use the heating, the hot water cylinder isn't empty, even if it was it has no bearing on your heating.
How do you know the HWC has water in it?
ONQ.
Think about it ONQ, and then tell me how it could possibly empty?
Clue: What drives the water through the HWC ?
How do you know the HWC has water in it?.
Have a look in the attic and see if there is another small water tank ( Header tank ) positioned above the main tank . So long as there is water in this tank then heating is safe to use . If you do not have a header tank then you must have a "Closed" heating system which has a pressure gauge on the system to show if there is water there. If you know where this gauge is and pressure is normal then system is safe .
The HWC will eventually empty if the main tank is drained and the main tank supply cut off and people continue to use the hot taps in the house.
I am happy to stand corrected or receive some wisdom on the matter.
<chuckle>
The hot water cylinder cylinder therefore regularly empties, refilled by water from the main attic tank, with hot water being drawn off to the HW taps throughout the house.
The HWC will eventually empty if the main tank is drained and the main tank supply cut off and people continue to use the hot taps in the house.
Good to hear that last bit
The HWC fills from the bottom, drains from the top. When you open a hot tap, the pressure from the cold feed atthe bottom forces hot water out the top of the tank. Ideal really as the water at the top is the hottest within the tank. Where dual coil immersion elements are used, the shorter 'sink' coil only heats the top portion of the tank.
Leo
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