more ads by this user The HVAC Stores Difference: on all orders above $49 dollarsLow Price Guarantee! Factory Authorized E-tailer Factory Trained Representatives Overview for Goodman GPG1436080M41The Goodman GPG1436080M41 3 Ton 14 SEER 80,000 BTU Gas Electric Air Conditioner Package Unit provides efficient electric heating and cooling to your home or business, keeping you cool in the summer and warm with gas heat in the winter. Also the Goodman GPG1436080M41 Gas Electric Air Conditioner Package Unit offer's the legendary quality and affordability associated with the Goodman brand and is backed by some of the best warranty coverages in the heating and cooling industry. All models comply with California Low NOx emission standards Louvered condenser coil protection Redundant gas valve and easy conversion to propane Self-diagnostic blower operation and safety circuits Direct spark ignition system Aluminum tube / aluminum fin coils Durable, corrosion-resistant aluminized steel tubular heat exchanger

HIgh-efficiency compressor with internal relief valve Our SKU number(s): Goodman GPG1436080M41 The manufacturer model number(s): Goodman GPG1436080M41 Home & Garden > Household Appliances > Climate Control Appliances > Air Conditioners 208 / 230 V. 1 Phase 60 Hz 22" H X 11" W 16" H x 16" W 11" H X 22" Wportable ac unit for office 16" H X 16" Wac power supply input Warranty Terms - Compressor:ac unit alarm system Warranty Terms - Heat Exchanger: Warranty Terms - Parts: There is a difference between my calculations and what electricians say. Am I missing something? If I need to install a 3 horsepower air conditioner. Electricians always choose wires that are more than 4 sq mm. They say that air conditioners consume high current.

My calculations tell me that I can use 1.5 sq mm only. 3 horsepower = 2237.1 watt I = Power / voltage = 2237.1 / 220 = 10.16 Amps According to the following table, I will choose 1.5 sq mm. So, Why does electricians choose that thick cables? current temperature wire maximum-ratings wire-size You do not indicate so I wonder if you have considered the cable run length. Why would you like a thinner cable, if it is to save cost then the length is likely subtantial and therefore more of a reason to use thicker conductors. Also the electricians are aware that compressor devices have very large inrush currents that are supported by thicker cables. I found this mentioned in an Off grid guide by JayCar. Australian Standard AS4509.2 states a surge factor of 7x the continuous power should be used for electric motors, water pumps, fridges, air conditioner, and washing machines. A surge factor of 3x should be used for kitchen appliances and other electronics equipment, and surge factor of 1x for resistive loads.

Another more interesting document on Cold Load Pickup Issues also shows similar inrush current figures. Similar tests were conducted with on a ¼ HP refrigerator motor. The test results showed an average inrush current of 15 amperes and a maximum of 18 amperes. The average inrush was 7.5 times the steady state run current of 2 amperes. It took 483 milliseconds to reach the steady state condition. The test after a 25 cycle interruption produced lower inrush current and shorter times to reach steady state, 6 – 17 amperes and with 217 milliseconds to reach steady state. Also tested was a 3 ton air conditioner. The momentary interruption test and the cold load pickup test showed an average inrush current of 90 amperes which lasted for 117 milliseconds. The inrush current was 7.26 times the steady state run current of 12.4 amperes. The steady state value was reached in 267 milliseconds.Browse other questions tagged current temperature wire maximum-ratings wire-size or ask your own question.

When it comes to rated equipment capacity, is it 12,000 BTU/ton? Or, is it 9,200 BTU/ ton? Actually, sometimes it’s 14,300 BTU/ ton. In reality, equipment capacity will change for 10:00 am to 3:00 pm almost every day this summer. Let’s take a look at how you can determine the current rated capacity of the equipment you sell, install, and service at any time of the day.   It’s a really a hot summer afternoon. Your customer calls complaining the air conditioning isn’t keeping up. One valid reason it may not be keeping up is because the capacity of the equipment actually goes down as the outdoor temperature goes up. Cooling equipment is rated in a temperature-controlled booth under very exacting conditions according to published AHRI standards. These conditions have the outdoor air at 95F, with a return air temperature of 80F at 50% relative humidity (RH) which translates into a wet bulb temperature of 67F. The fan airflow is set to 400 CFM/ton. Nobody I know is comfortable with the thermostat set at 80F.

We rarely operate equipment under these conditions, but this is the baseline for the standard.  Typically, under these conditions, cooling equipment is rated to deliver about 11,200 BTU/ton. But wait, there’s more … In addition to meeting published AHRI standards, the manufacturers provide us with cooling performance tables for each piece of their equipment that shows how rated capacity changes as outdoor temperature, return air temperature, humidity, and airflow changes in our systems in the field.  When it gets warmer, cooling capacity goes down From the table below we see that as outdoor conditions change, the cooling capacity of the equipment also changes. Consider the following changes in the capacity of this 3-ton unit: Rated Cooling Capacity BTU Since more contractors are starting to measure and rate the operating efficiency of HVAC systems, determining the rated equipment capacity under different operating conditions becomes critical.  If you were to measure this 3-ton unit’s BTU delivery at only 31,000 BTU and you expect 12,000 BTU/ton, or 36,000, you would think the system operates poorly.

But if you knew that 31,000 was its rated capacity at 105F, you’d be delighted with the results of your work. Manual J and Manual S Manual J is an industry standard that calculates the heat gain of a home in the summer and the heat loss of a home in the winter. Ideally, you need to choose an air conditioning system that removes the amount of heat equal to the calculated heat absorbed by the home to maintain indoor comfort.                                                                                                                                                                                                                                                     Manual J calculates the heat gain of the home under design conditions which are calculated on some of the hottest days of the year.

If the load calc comes in at 37,000 BTU and you stop there, you may eyeball the unit size at 3 tons or 36,000 BTU, based on the nominal tonnage of 12,000 BTU/ton. Manual S requires you to look up the equipment’s rated capacity based on outdoor temperature, airflow/ton, and the desired indoor temperature to verify what the equipment rated capacity will be under design conditions. Manual S matches the equipment to the heat gain of the house. Without this important step you may undersize the cooling equipment. Based on the table above, if outdoor conditions reach 105F, the equipment will only remove 31,000 BTU from the house, leaving your customers 6,000 BTU short each hour. Actual cooling performance tables can be found at each manufacturer’s website. More engineering data is also turning up on search engines, just punch in the model number and see what pop’s up. You young folks with sharp vision can see most of this information in your smart phones. Start collecting manufacturer’s cooling performance tables whenever you can.