Question about Whirlwind FH-778 Air Conditioner

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Central air conditioning unit

Which line is the low side of a unit?

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The large tube. it should be very cold
and the high side should be very warm but not hot.
if very hot you are leaking and low on freon.

Posted on Jun 04, 2008

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R-22 home condenser unit low side and high side pressures when running


Pressures look good but to know if it is charged correctly you have to do a sub cool or superheat to know for sure. Rule of thumb is if turn unit it on let it run 10 minutes. If the suction line sweats and is cold. Might be proper charge.

Jun 24, 2014 | Ruud Central System Air Conditioner

Tip

Central Air Conditioning or Window Air Conditioner


Many people look into installing air conditioning in their home every year. There are many options to consider when it comes time to make that decision. To help make that decision more clear, I will explore some of the positives and negatives of the two major options. Ductless Split A/C type units lately are also becoming more of a popular option. I will do another “Tips and Tricks” on that option. To include that in this one would just be more confusing. So for now we will just look at window air conditioners and central air conditioning.

Central air conditioning is usually the best way to go if you already have a central hot air heating system already installed in your house or building. The advantage that you have is that you already have the air handler or blower part already installed. The ductwork for the distribution of the air is also all ready in place. The ductwork may need some modification to make it work well for air conditioning, but the major part of it should be adequate. To use the existing furnace and ductwork an A/C coil will need to be installed at the furnace. An outdoor condenser unit will be installed outside and copper tubing will be used to connect the coil to the outdoor unit. Some electrical wiring will need to be done to power the outdoor unit. Low voltage wiring will also be needed to hookup the thermostat, the furnace, and the outdoor unit together so that they can talk to each other. Basically the thermostat will just tell the furnace to run the blower on high speed and the outdoor condenser to start up.
If there is no central hot air heating, then the installation of central air conditioning can be much more difficult. Many homes that do not have hot air heat also do not have the room to install ductwork. This would eliminate this possibility. If you are in this category you should get a professional to look at your situation to see if central air conditioning can be done. If it is the room available is to enough to do a good job and get large enough ductwork installed, then do not force the issue and go another option. Ductless split type air conditioning may be your best option.

A window air conditioner in my opinion is a last resort for air conditioning your house or building. There are many down sides to window air conditioning units. There are two good things that window air conditioners have going for them. They are very inexpensive when it comes to cost per BTU of cooling. They also install very quickly and easily. That is where the good part of them ends.

Window air conditioners are security risks. If a thief wants to get into your house, the thin sheet metal box that holds the unit in the window can easily be pulled apart to get in through the window. I have seen many units that are not even screwed fast. If the window air conditioner is just there, balancing in the window frame, it becomes very inviting for a unexpected guest. The window air conditioner is also very inefficient. These units use more power per BTU of cooling than any other type of air conditioner. If you are a light sleeper, than chances are you will not want one of these window shakers. Window air conditioners are one of the loudest forms of air conditioning.

The fan for these units is very loud when running. Then add the noise of the compressor and you have enough decibels to keep many people wide awake all night long. If you choose to use a window air conditioner, than you should also look for a place that it can be secured and placed in a room that you will not be sleeping in.


As you can tell by now, I am not a big fan of window air conditioners. They do have a place for some people. However, you do need to be aware of the problems that you may encounter with them. The low initial cost can be offset by the fact that they typically do not last as long as a central air conditioner.

Central air conditioning will last much longer, be quieter during operation, be more efficient, be more secure, but the initial cost will be higher. How much depends on each situation. When considering your options for air conditioning installation you need to get prices for everything and then decide what type of unit will work the best for you.


http://www.fixya.com/support/r3850183-condenser_coil_cleaning_condenser_coil

http://www.fixya.com/support/r3636751-air_conditioner_seer_seasonal_energy

http://www.fixya.com/support/r3636709-size_air_conditioner_need

http://www.fixya.com/support/r3633369-portable_air_conditioning_great_portable

http://www.fixya.com/support/r3623253-window_air_conditioners_clean_every_year

on Jan 01, 2010 | Air Conditioners

3 Answers

My A/C blowing air, but it is not cool. It has started freezing up. We just replaced the air filters and since then it is freezing up. We even gently cleaned the a/c coils before replacing the filters. ...


Hello, sounds like it is either a low charge or lack of airflow, what type of filter are you using? sometimes those filters that claim to be super effecient will actually cut down on your airflow and cause the ac to freeze up.

Jul 15, 2011 | Intertherm Air Conditioners

1 Answer

How do i hook my manifold gauges to my residental condensing unit to check pressures


The AC manifold gauges set have the three chambers: the low pressure chamber (left side), utility chamber (middle), and the high pressure chamber (right side).

When technicians connect the HVAC manifold gauge to the air conditioner units, he connects the low pressure side of air conditioner unit to low pressure gauge side.

If he wants to read the pressure in discharge line he connects the high pressure gauge hose to the air conditioner high pressure side.

The utility port (the middle chamber) is a place you connect the hose to vacuum pump, recovery units or add or remove refrigerant from AC units.

Air conditioning gauges is used to measure air conditioner units pressure within closed-system to evaluate or troubleshoot the AC units. Gauges manifold set is the most frequently used item when it comes to refrigerant or pressure.

Air conditioning gauge set allows the HVAC technician to check AC units operating pressures, transfer AC refrigerant, pressure test system, purge the system with nitrogen, and perform other necessary tasks.

The gauges manifold set includes the hoses, the manifold, the valves, the compound gauge (low pressure gauges) and high pressure gauge.

Jul 24, 2010 | Air Conditioners

1 Answer

Central air conditioning system is blowing warm air.


many, many. Is the outside unit running? If it is, is the compressor running? Feel the refrigerant lines leaving the unit. Little one should be warm. Big one should be cold, probably sweating.

Jul 08, 2010 | Ruud UAPA042 Air Conditioner

1 Answer

Where is the A/C low side recharge fitting


on what???car or window A/C or central A/C on a car its usually near the accumulator and if lucky has a blue cap on it w/ a snap recharge fitting on it hi side is a red cap, on window units theyre sealed and you need to install a saddle-tap,on central A/C's the low side is the larger of the two lines entering the compressor housing outside,usually the recharge fittings are outside near the unit

Jul 29, 2009 | Air Conditioners

1 Answer

I want to know how to add more freon to an existing home central air condition unit


there are two schrader valves at the condensing unit outside right at the bottom of the unit below the electrical connection box. there is where your guages hook up, low pressure side is the wider of the two copper tubes, high pressure the thinner of the two

Jul 15, 2009 | Air Conditioners

1 Answer

I have a Nordyne unit I need to locate where the freon is put in the air conditioning central air unit


The refrigerant is charged into the system on the low side or the larger line outside at the condensor. Unless you have an EPA card to buy R22 you have to have a service tech Mainly for your safety. Get a free estimate wont cost you anything and you know upfront what it will cost. Rus

Jul 04, 2009 | Whirlwind FH-778 Air Conditioner

1 Answer

How to hookup refrigerent gauges to central air?


Outside in the condensing unit you'll see the two copper pipes coming from the valves in the condensing unit. atach the hose from the high pressure gauge to the port in the smaller copper pipe (liquid line) and the other hose to the port of the other line (suction line) in there you check the low pressure (68psi) and if is low you can rechrge it, in the high side you should have no much more than 250psi .This pressures are for R22.

Apr 25, 2009 | Air Conditioners

1 Answer

Problem with central air condition


that depends on the size of the unit and lenght odf the line set.. to give you a general answer your suction pressure should be about 70 PSIG and you liquid line (small line) should be between 245-265 depending on the outdoor temp you will need a set of freon gauges to check this these readings are for an R-22 system if you have R-410a the readings will be much higher

Aug 20, 2008 | Whirlwind FH-778 Air Conditioner

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