Hi. Can anyone help me to know what the typical Electric Power consumption is for a gas boiler having a maximum heat output of 120000KCal/h.
Andy
Contact breaker sizing for boiler
Feb 13, 2007
5 Replies
The "convert" prog' makes those kCal/hour into a whopping 140kW of heat. Which implies a small industrial unit. About 250W for the circulating pump (if any) , solenoids and the monitor electronics. I'm assuming UK (cos you don't say 'furnace') so that's about 1A, so a 2Amp fuse should be OK.
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Thanks for the reply John. We need a circuit breaker for the boiler so I'll go for one with 10 Amp and groundfault protection .As the wires are at least 1.5mm^2 they should stand that current without melting.
Andy
Anything from zero on up. Why does it need an electrical supply?
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It is for Industry. Some I can remember are Ignition, fans, Pumps, Zone and gas valves, switchboard and programming unit, keep hot and preheat heaters, standby power.
Andy
You need to add all of those up (worst case) and calculate the correct size.
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