Air-condition 24000 BTU-Help
- Thread starter Andrew81
- Start date
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Ask the manufacturers or read the data sheet.
Bear in mind there are two current ratings.
the normal current when running.
The start up current taken while the motors run up to full speed.
During start up a voltage drop in the supply cable will make the run up time longer and this has to be considered in the over current protection.
Bear in mind there are two current ratings.
the normal current when running.
The start up current taken while the motors run up to full speed.
During start up a voltage drop in the supply cable will make the run up time longer and this has to be considered in the over current protection.
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I seem to recall that 24000 BTU ( per hour ) is about 7 Kilowatts or 28 amp normal running. But I do not have conversion table to hand.
24,000BTU may well be equal to 7kw in terms of heat output, but you can't use this type of conversion to work out the power consumption of an air conditioning unit.
Unlike, for example, a fan heater, an A/C heat pump heats or cools by moving heat from one location to another. In doing so, it can quite happily give a cooling capacity of say 7kW while requiring only 3kW of electrical power. That's a very broad approximation, and the actual ratio of heat output to power input depends on the COP (Coefficient Of Performance) of the air conditioning unit in question.
Nobody can give you a definitive answer without more information, but I expect a 20A radial will more than suffice.
Unlike, for example, a fan heater, an A/C heat pump heats or cools by moving heat from one location to another. In doing so, it can quite happily give a cooling capacity of say 7kW while requiring only 3kW of electrical power. That's a very broad approximation, and the actual ratio of heat output to power input depends on the COP (Coefficient Of Performance) of the air conditioning unit in question.
Nobody can give you a definitive answer without more information, but I expect a 20A radial will more than suffice.
With no other information one has to take the worst case scenario and plan for that. And even then it may be wrong and under-astimate the requirement for the cable.
Probably won't but as my uncle said when planning the entrance gates consider on one day you may have to get a Rolls Royce in so do not size the entrance for a Mini
24000 BTU/hour? That used to be known as a 2 ton unit, because it can freeze 2 short tons of water a day.
Reckon on a worst case coefficient of performance plus a bit for motot efficiency and the full load current should be around 15A. It it's an all-in-one unit, such as the type that fit into a window, you'll need a 20A circuit to cope with the other fans etc.
If it's split, a modern condensing unit will have an electronic soft start, so no need to worry about a starting transient. Otherwise it would be prudent to use a 30A circuit. You will also need a 3A circuit for the fan coil unit.
Reckon on a worst case coefficient of performance plus a bit for motot efficiency and the full load current should be around 15A. It it's an all-in-one unit, such as the type that fit into a window, you'll need a 20A circuit to cope with the other fans etc.
If it's split, a modern condensing unit will have an electronic soft start, so no need to worry about a starting transient. Otherwise it would be prudent to use a 30A circuit. You will also need a 3A circuit for the fan coil unit.
Thanks Stoday and others. However, I am from Cyprus (Greek Side) and we apply the UK regulation (Wiring Regulations 16th edition, BS 7671:2001(2004)) The distribution voltage and the grid in Cyprus is similar with english standards.
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