One six-inch round duct is good for about 120 CFM, a six-inch duct carries about 150 CFM, and eight-inch carries about 200 CFM of cool air. If it's more than 50', run #8-2 or 8-3. What Size Home Would Use a 2.5-Ton A/C Unit?. Use the AC Unit sizing calculator below to calculate your required central air conditioner and heating system tonnage size. Currently I have a 220v, 30 amp breaker with 10 AWG Romex. Select the system type needed for your home. In some unit bundles, the required AC coil may be larger than this condenser in tonnage. So you've determined that your AC is tripping the breaker, but you're clueless as to why. is 50, I would go with a 40 amp breaker and then size my wire accordingly. Take a look at the Lennox air conditioning condensing unit tag on Page 19. … The panel was upgraded a few years ago, after the AC unit was installed. RE: HHP230AKA 2.5 Ton 12 Seer H/P Cond Unit FCX3600C 2.5 Ton 12Seer H/P Air Handler AMFK10AHA 10KW Aux Heat Bank Unit will not start. If you have a one ton AC unit, it means it has the ability to cool 12,000 BTUs an hour. A capacitor keeps an electrical charge on standby to provide it to the motor when it first turns on. Residential central air conditioners come in a range of sizes from 1.5 ton to 5 ton models. It should be noted that there is a distinct difference between BTU and BTUh. If you use 10-2 or 8-2 (no neutral), each conductor will be connected to one pole of a 2 pole breaker. Most common voltage ratings for AC units are 115, 125 and 220 volts, and amperage rating can run from 15 to 20 amps. So if you have a two-ton system, you need ductwork that will carry 800 CFM. The Goodman AVPTC61D14 air handler is a variable speed, energy efficient unit compatible with ComfortNet communicating technology. Follow these easy steps: Select the region you live in according to the color keyed map below. The ac should be installed prior to any finish work from what is being said here. Maybe not all the time but they will trip. Look at the nameplate on the AC unit and you should see the amperage and on most units the required circuit size … A … read more The matter being is that compressors are hard to start especially at 208V-1ph. The system i have is 18000 btu heat and AC. And what size wire do i use from the - Answered by a verified Electrician We use cookies to give you the best possible experience on our website. Also tested was a 3 ton air conditioner. "Min. is 32 and "Max." What size AC is right for me? Notice that the MCA is 28.6 amps and the maximum fuse or circuit breaker is 50 amps. The ones that don't work out will be tripping the breaker on start under different and varying conditions. Air handler breaker sizes for both above units are max 15 amps and min 5 amps. the run is about 60 feet from my subpanel. What size circuit breaker must be used for a 3.5 ton residential condensing unit? 5 ton AC unit is one of the biggest that can be powered by a generator. What Size Breaker For Ac Unit. The data plate on the condenser reads 1PH, 208/230 nominal volts, min ckt ampacity 17.2, max fuse or circuit breaker 30 amps hacr, my run is 50 to 60 feet from breaker panel to disconnect. There will be two numbers on the name plate of the unit. Tonnage ratings are typically expressed in increments of .5 tons, so residential air conditioners are usually rated as 1.5, 2, 2.5, 3, 3.5, 4, 4.5 or 5 ton units. I recently purchased a ductless mini split and am trying figure out the correct breaker and wire size. This is enough to cool down up to 3000 square feet home. They may have just installed whatever was there before in terms of the breaker rating, or the old panel had a 30A breaker and they just installed a breaker to match the wire size. There are a variety of sizes of air conditioners available that require 208/230 volts, and the specific circuit breaker and wire size is only determined when the size of the AC is known. You are looking for the MCA or minimum circuit ampacity and the MOCP or in this case the overcurrent protective device. Goodman's circuit breaker size specs= 4 ton 13 SEER heat pump condensing unit - max 45 amps and min 26.4 amps. The "size" of a circuit breaker is the maximum current that can pass through the breaker without tripping the circuit and causing a loss of power. The GSX140421 Goodman condenser is a 3.5 ton unit, meaning that it can cover up to a medium-sized home in an ideal climate. A 25 amp breaker is not a stock item, nor is it readily available. Electrical - AC & DC - wireing for a 3.5 ton unit - I am wireing my shop I am installing the wireing for a future 3.5 ton a/c heating unit. (Cooling and Heating or Cooling Only) Select the optional heating type. A 5 ton AC unit generates an outstanding 60,000 BTU of cooling power. Checking Wire Size Ac Units 2 You. A #6 Al wire typically matches a 40A breaker so I can see that happening. Using that measurement, a two-ton AC unit will remove 24,000 BTUs, while a three-ton AC unit will remove 36,000 BTUs. Residential Central AC systems come in a maximum size of 5-ton. 3.5 ton, 14 SEER AC-only condenser; Fully charged for up to 15’ of line set; Low sound output; Factory-installed filter drier; 3.5 ton. My questions is that 20 amp circuit gtoing to power both inside and outside unit or do I have to have two different circuits, one for inside unit and one for outside unit? (1) 5.0 Ton Goodman 14 SEER GSX Straight Cool Condenser - GSX140601 (1) Goodman 5.0 Ton ASPT High Efficiency Multi-position Air Handler - ASPT61D14A Choice of (1) HKS Series Electric Heat Kits (5, 8, 10, 15 or 20 kW)Note: Adding heat kit will increase p 5 ton 14 SEER heat pump condensing unit - max 60 amps and min 34.5. To get a rough estimate of the tonnage you will need from your AC unit, use the following calculation: Checked main breakers for both units and breaker on air handler. The exact amps an electric furnace requires is solely based on the size of the furnace and its performance capabilities; however, typically electric furnaces require a draw between 60 and 80 amps. If you really want to … You can damage the AC unit. Central air conditioners and heat pumps use capacitors. It gets tricky when we try to determine the size of a generator that can run a 5 ton AC unit. Bummer. If you want to run your central air conditioning we would need to install a 50 amp breaker not a 30 amp breaker. The inrush current was 7.26 times the steady state run current of 12.4 amperes. Determine what unit to buy based off of the room size. In the heat of the summer, one thing's sure to keep you cool and comfortable: a properly sized air conditioner. Example: If the "Min." Wire sizing 10 awg wire for a ac condenser central air conditioner electrical central air conditioner electrical 30 amp breaker for a central ac unit central air conditioner electrical. The electrical characteristics for my LG ductless mini split are as follows: MOP 35 amps MCA 23 amps Cooling rated amps 17.55 Heating rated amps 17.55 Compressor 17.3 amps Fan 0.25 amps One is allowed to use the next size higher breaker, which is a 30, the wire size must be increased accordingly. Breaker size depends on what is installed and length of wire. When we talk about air conditioning, a “ton” is the measurement of a units ability to cool. will #10 wire A rule of thumb says ducts should carry 400 cubic feet per minute (CFM) of air for every one ton of cooling. The size of a breaker is determined by the amp draw. How Many Amp Circuit Breakers Are Required For A 1 5 Ton Ac Unit. The lower two voltage ratings are common in smaller units, while units with a rating higher than 15,000 BTUs will require a 220-volt circuit. If you want the best of the best air handler for your home, the AVPTC61D14 is the best option for you. Circuit Ampacity" and "Max. Included in this cable will be a #12 bare ground wire. without going over the Max. I am installing a 2.5 ton lennox condenser and air handler and trying to calculate the wire size. Over time, a capacitor will wear out; you must replace it so your air conditioner or heat pump continues to work properly. When shopping for a new air conditioner, there are many different technical specs to think about. Two very important electrical components to know about are AMPs and volts. By multiplying the … If it is a unit for the North American market the condensing unit will have a data plate or sticker that will have this info. This means it is allowable to install this unit on a circuit breaker rated at 50 amps and a conductor rated at 28.6 amps, according to the NEC’s NFPA 70. You want to size the wire and breaker large enough to supply the Min. Instantaneous starting current on a 5 ton unit … A 5 ton air conditioner will need a two pole 40 amp circuit breaker to supply 240 volts over a cable of #8 copper wires. DIY Calculations. The momentary interruption test and the cold load pickup test showed an average inrush current of 90 amperes which lasted for 117 milliseconds. The out side unit specifies , max breaker size at 20 amps. Well, an air conditioner usually trips the breaker because it's pulling in more amps than the breaker is rated for.That is, if you have a 20-amp breaker and the AC pulls 30 amps, the breaker trips. Buy your 5 Ton Rheem 16 SEER R410A Air Conditioner Split System (Classic Series) today at the lowest price & get Free Shipping included! A 240 line is needed for the condenser directly to breaker panel with a disconnect at outside unit. Therefore, the more tonnage the AC unit is rated for, the more air it can cool down. Yes this generator might power your central air conditioning unit but you are running into issues here. Learn all you need to know about AC volts and AMPs here. 3 ton AC unit costs $2,200 – $2,500 4 ton AC unit costs $2,500 – $2,900 5 ton AC unit costs $2,900 – $3,500 ( a 5 ton unit is extremely powerful and is not required for most homes) In general, you can roughly add $400-$700 for each additional ton, as the units go up in size. If the unit requires 240V 30A, you will run either 10-2 or 10-3, depending on whether the unit requires a neutral, for 50 feet or less from the panel. I'd probably go with a 40 amp since you won't find a 45. Overcurrent Device". (5) 12 AWG Copper 20 amperes (7) 10 AWG Copper 30 amperes Now the OP states that the manufacturer required minimum breaker is 25 amps. 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