Your browser is not supported. For the best experience, you should upgrade to a modern browser with improved speed and security. View full-size in new tab Single-Packaged Products with Energy-Saving Features and Puron® refrigerant.15.0-16.0 SEER / 12.0-12.5 EERSFactory-Installed TXVMulti-speed ECM Blower Motor - StandardSound levels as low as 72dBATwo Stages of CoolingDehumidification FeatureFeature / BenefitsOne-piece cooling unit with optional electric heater, low sound levels, easy installation, low maintenance, and dependable performance.Puron Environmentally Sound Refrigerant is Carrier’s unique refrigerant designed to help protect the environment. Puron is an HFC refrigerant which does not contain chlorine that can harm the ozone layer. Puron refrigerant is in service in millions of systems proving highly reliable, environmentally sound performance.Easy InstallationFactory-assembled package is a compact, fully self-contained,electric cooling unit that is prewired, pre-piped, and pre-charged for minimum installation expense.

These units are available in a variety of standard cooling sizes with voltage options to meet residential and light commercial requirements. Units are lightweight and install easily on a rooftop or at ground level. The high tech composite base eliminates rust problems associated with ground level applications.window ac unit power usageInnovative Unit Base DesignOn the inside a high-tech composite material will not rust and incorporates a sloped drain pan which improves drainage and helps inhibit mold, algae and bacterial growth. outside ac unit runs constantlyOn the outside metal baserails provide added stability as well as easier handling and rigging.what to do when ac unit is frozenConvertible duct configurationUnit is designed for use in either downflow or horizontal applications.

Each unit is converted from horizontal to downflow and includes horizontal duct covers. Downflow operation is provided in the field to allow vertical ductwork connections. The basepan seals on the bottom openings to ensure a positive seal in the vertical airflow mode.Efficient operation High-efficiency design offers SEER(Seasonal Energy Efficiency Ratios) of up to 16.0.Durable, dependable componentsScroll Compressors have 2 stages of cooling and are designed for high efficiency. Each compressor is hermetically sealed against contamination to help promote longer life and dependable operation. Each compressor also has vibration isolation to provide quieter operation. All compressors have internal high pressure and overcurrent protection.Multi-speed ECM Blower Motor is standard on all 50VG-A.Direct-drive PSC (Permanent Split Capacitor) condenser-fan motors are designed to help reduce energy consumption and provide for cooing operation down to 40ºF (4.4°C) outdoor temperature. Motormaster® II low ambient kit is available as a field-installed accessory.

Thermostatic Expansion Valve - A hard shutoff, balance port TXV maintains a constant superheat at the evaporator exit (cooling cycle) resulting in higher overall system efficiency.Refrigerant system is designed to provide dependability. Liquid filter driers are used to promote clean, unrestricted operation. Each unit leaves the factory with a full refrigerant charge. Refrigerant service connections make checking operating pressures easier.High and Low Pressure Switches provide added reliability for the compressor.Indoor and Outdoor coils are computer-designed for optimum heat transfer and efficiency. The indoor coil is fabricated from copper tube and aluminum fins and is located inside the unit for protection against damage. The outdoor coil is internally mounted on the top tier of the unit.Low sound ratings ensure a quiet indoor and outdoor environment with sound ratings as low as 72dBA.Easy to service cabinets provide easy 3 panel accessibility to serviceable components during maintenance and installation.

The basepan with integrated drain pan provides easy ground level installation with a mounting pad. A nesting feature ensures a positive basepan to roof curb seal when the unit is roof mounted. A convenient 3/4-in. (19.05 mm) wide perimeter flange makes frame mounting on a rooftop easy.Dehumidification FeatureThis unit has independent fan speeds for low stage cooling and high stage cooling. In addition, 208/230 VAC models have thefield-selectable capability to run an enhanced dehumidification (’DHUM’) speed on high stage cooling (as low as 320CFM perton). Coupled with the improved dehumidification associated with low stage cooling, the DHUM speed allows for a complete dehumidification solution independent of cooling stage. The dehumidification control must open the control circuit on humidity rise above the dehumidification set point.NOTE: The enhanced dehumidification feature on high stage cooling does not support use of an economizer.Standard horizontal metal duct covers with insulation come with the unit and cover the horizontal duct openings.

These can be left in place if the units are converted to downflow.Cabinets are constructed of heavyduty, phosphated, zinc-coated prepainted steel capable of withstanding 500 hours in salt spray. Interior surfaces of the evaporator/electric heater compartment are insulated with foil-faced insulation, which keeps the conditioned air from being affected by the outdoor ambient temperature and provides improved indoor air quality. (Conforms to American Society of Heating, Refrigeration and Air Conditioning Engineers No. 62P.) The sloped drain pan minimizes standing water in the drain. An external drain is provided. Blower Motor HP1/2 HP Condenser Motor HP1/10 HP Number of Fan Blades1Image 1 of 5 My big fat oversized air conditioner. I did a little doctoring of this photo, but using a data logger showed that the air conditioner I had installed in 2009 is definitely oversized. Back in 2009, I had a new air conditioner installed our condo. The previous one was an ancient 25 years old and barely limping along.

It wasn't cooling much, and the summer electric bills had risen. So, I did a Manual J load calculation on our condo to find out what size we should replace it with. I wanted to install one that wouldn't be too big so it would have long runtimes and keep our place cool and dry. Well, I put one of my new data loggers to use this summer to find out if I succeeded. The (doctored) photo below, which is not our condo, might give you a hint how well I did. Once you have an air conditioner installed, it's not hard to tell if it's oversized. All you need to do is time how long it runs on a hot day. If it runs a lot and still keeps the place cool, you're in good shape. If it runs only a few minutes at a time and spends the majority of the time turned off, your AC is oversized. In the world of air conditioning, "hot day" has a specific definition. There's this thing called the summer design temperature, which is the temperature that your location goes above only 1% of the time. Out of the 8,760 hours in a year, the summer design temperature is the temperature exceeded only 87.6 hours, on average.

Your air conditioner should be sized to run almost continuously at the design temperature. That's the idea behind a Manual J heating and cooling load calculation, a protocol developed by the Air Conditioning Contractors of America (ACCA). But there's some slack built into it, so you don't need to worry about being hot on a day when the temperature is a few degrees over your design temperature. If you're getting runtimes of 45 minutes or more per hour when it's near your design temperature, your AC is probably doing a pretty good job. As I mentioned, I did a load calculation on our condo before I got the new AC. The result was that we needed about 1.6 tons of air conditioning capacity. As I wrote in an earlier article about how to find out if your AC is oversized, I wanted to go with the 1.5-ton AC, but I chickened out and put in a 2-ton unit instead. Our place is about 1,500 square feet, so that's 750 square feet per ton. The standard rule of thumb that a lot of contractors still use around here is to install one ton of AC capacity for each 500-600 square feet of conditioned floor area.

Since our place is old and leaky (yeah, yeah, cobbler's kids and all that), 750 square feet per ton is pretty good. But, was it good enough? Well, this summer I got finally put a data logger on our air conditioner to see just how oversized it really is. I previously wrote about using a stopwatch to determine that our AC was oversized because the on-periods weren't long. I measured about 9-10 minutes max on a hot afternoon shortly after I got the new AC. The data logger I used in my latest experiment was the Hobo UX90-004 from Onset. All you do is stick it on a motor (it's held there by magnets) and it tells you when the motor is on and when it's off. I opened up the furnace and stuck it on the blower motor, as shown in the photo below. The display shows how many total hours and minutes the motor ran while the logger was deployed, but you get a lot more detail when you download the data. After sorting through a few months of data, I settled on one day that seemed to be perfect for illustrating how well sized our air conditioner is.

That day was last Friday August 29, and I looked at the 24-hour period from midnight to midnight. I also made sure to keep the indoor temperature constant. The thermostat was at 75°F for nearly the whole day. The only time it wasn't was in the early morning morning when I lowered it to 74°F. You can see the data below. The first graph shows the average temperature for each hour of the day (green), the amount of time the AC was off during each hour (red), and the amount of time the AC was on during each hour (blue). (The temperature data are from Weather Underground.) Our design temperature in Atlanta is 92°F. Last Friday, we had a good 5 hours when the temperature stayed right there, around 91-92°F. We had another couple of hours above 89°F, so it was perfect for seeing if our AC is oversized. The first thing to notice is that there was only one hour in the whole day when the AC was on more than it was off. From 6 p.m. to 7 p.m., the AC was on for 31 minutes and off for 29.

Note that the first graph isn't showing the actual on/off cycles. I binned the data so that each red column shows the number of minutes in its hour when the AC did not run, and each blue column shows the number of minutes the AC was on in an hour. When it got hot in the afternoon, there were about three cycles per hour. Over the whole 24-hour period, the air conditioner went through 35 cycles, as shown in the second graph. It started the day turned off and ended the day turned off and came on 35 times in between. (The red columns at the beginning and end don't show the whole off periods. The first one shows only 29 of 53 minutes off, and the last shows only 4 of 63 minutes turned off.) I've been studying these data for a while now, and there's a lot to see here. Here are some of the numbers that jumped out at me: Some of the main lessons we can learn from these data are: I got an email from Rick Chitwood a couple of weeks ago in which he mentioned how he likes to do air conditioner sizing and installation.