Even better to switch it off before the shower so there is less heat to escape in the mean time.
fuse blows after installing timeswitch
- Thread starter mm82
- Start date
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My experience with a 200L version:
1 hour/day, 0600-0700. ~1,5KWh
1 hour twice a day, 0600-0700 & 1200-1300. ~2-2.5KWh
2 hours/day, 0600-1800. ~2KWh
8 hours/day, 0600-1400. ~3KWh
24 hours/day. 4-5KWh
This was in a non insulated workshop (Farm building) Winter time allow another 10-20%
so difference between 1.5 and 4 KWh is 2.5x20p=50p/day or £180/year
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This one will be to modern, high standards of insulation.
Your 200 cylinder would take over 3 hours to heat, so obviously heating it for 1 hour a day will not be enough.
Your 200 cylinder would take over 3 hours to heat, so obviously heating it for 1 hour a day will not be enough.
How much has it changed since june 2020?
according to the manufacturer standing heat loss would be 1.25 kwh/day at 65C, probably slightly higher due to loss on pipes but yeah, even assuming the cost of electricity will ramp up quite a bit in the next few years its likely not going to be a massive difference. the timer was around £30.
Are they less efficient than the old copper unlagged cylinders then?
Apologies, thinking about size, I doubt it's as big as 600mm diameter and 1m high, allowing for insulation I'd guess it must be more like 100L.
It isn't cold, it's a well lagged cylinder and still warm from the previous day.
EDIT: But in the days we heated a 18x36" copper cylinder with an immersion heater it was plenty hot enough for a bath in 20-25 minutes. I don't know how long it would have taken to reach a full 65', that was only ever a mistake. I'll guess 90-120minutes
Last edited:
Example
Amount of water 200 litres
Start temperature 12C
End temperature 50C
Heating power 3kW
Time: 2 hours 57 minutes
Near enough 1 litre of bathwater per minute
Easier to remember that than to do the calculation.
So an older 100 litre would take a bit over an hour and a half.
Edit
https://bloglocation.com/art/water-heating-calculator-for-time-energy-power
Amount of water 200 litres
Start temperature 12C
End temperature 50C
Heating power 3kW
Time: 2 hours 57 minutes
Near enough 1 litre of bathwater per minute
Easier to remember that than to do the calculation.
So an older 100 litre would take a bit over an hour and a half.
Edit
https://bloglocation.com/art/water-heating-calculator-for-time-energy-power
so I've removed the wire on #1, the timer is on override always on. it shows to be powered and on from its LEDs without fuse issues,
but 3 hours later I can't tell much of a difference in terms of water temperature, I'm not sure if I'm missing something here. is the insulating connector necessary?
I'm trying plugging 1 back and removing 2, it might be too early to tell but doesn't seem to be doing much either..
say I wanted to temporarily reinstall the original untimed switch I posted earlier and have a shower, how would I go about wiring that correctly?
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