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What is the maximum distance from the A/C condensing unit to the evaporator?

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There are many things to consider, size, type of refrigerant and make. If you are installing the unit, check the install manual. without a doubt, it will tell you the max.

Posted on Apr 15, 2014

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A copper thin tube from the unit is very hot. Is it normal?

Yes, well somewhat normal. The refrigerant leaves the compressor at high temperature and flows through the condenser coil where it cools about 20 degrees warmer than the outside air flowing through the condenser. Many small air conditioner units use a small copper tube (capillary tube) of a specific diameter and length for that system to cause a decrease in refrigerant pressure between the condenser and the evaporator. The refrigerant leaves the compressor as a gas at high pressure, cools in the condenser and changes into a liquid. The liquid flows through the cap tube and cools more as the pressure decreases and gets closer to the evaporator. The refrigerant boils and evaporates under the low pressure of the evaporator and turns back into a gas. That gas is pulled back to the compressor.
If the condenser is not cooling the refrigerant enough, the tube can become extra hot. Efficiency is reduced. Actual temperatures throughout the system depend on the type refrigerant used, suction and discharge pressure at the compressor, outside and inside temperature. Tables, charts and graphs for various pressure-temperature relationships can be found in refrigeration books and chemical web sites.

Mar 17, 2015 | Carrier FB4ANF060 HVAC Electric Unit & AC...

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Guidance in replacing an evaporator coil for a Carrier Model 38GS014300

If it is still operational, I would leave it alone. The tools you would need would be an ocy/act welding pack, a vacuum pump, pipe cutters, and if the unit is R-22, you will need to close the king valve on the condensing unit high sidle (little pipe), and push the contactor in to remove all the refigerant in the line to store it in the condensing unit. To know if it is evacuated, you'll need a set of refrigerant guages. Depending on how much you want to spend, it would be cheaper to have someone come out and do it. The parts I have listed can run you upwards of $500. Plus, you'll need to know what your doing so you don't damage your compressor after changing your coil. You'll also need to replace the dryer once you open up the sealed system.

Sep 18, 2014 | Heating & Cooling

1 Answer

Why dose the front unit work fine and rear unit only blows air

There are lots of possibilities. Are you perhaps just running just the fan? Is the inside air below the thermostat setting? Is the compressor engaging? If the compressor is running, what is the current draw on the common line going to the compressor? A white tag on the housing should show the RLA for the unit. RLA: Acronym for "rated load amps". The maximum current a compressor should draw under any operating conditions. Often mistakenly called running load amps which leads people to believe, incorrectly, that the compressor should always pull these amps. You should never use the listed RLA to determine if the compressor is running properly or to condemn a compressor. The running amps of a compressor are determined by the evaporator temperature, condensing temperature and the line voltage.

If it is at the published specs for current draw then perhaps the just cleaning the evaporator and condenser will restore the unit if you can feel that the output of the compressor is nice and cold. Also a broken cover can make the unit not channel air properly through the condenser and evaporator. A missing baffle or large seams in the ducts portion that separate the intake from the outflow will cause the unit to recycle the cold air and not distribute the cooled air to the duct system.

If the compressor is not running, it could be a bad start capacitor or the temperature cutoff switch. It could also be a defective control board or thermostat. A test light on the output plug of the control board will help isolate the problem.

Jul 28, 2014 | Dometic Rooftop RV Air Conditioner

1 Answer

Can I put a lower amp fan motor on a condenser if the one has a higher amps


You air conditioning system is designed as an entire unit. All the parts were selected to work together.

The condenser fan motor has been selected to match system voltage, provide enough horsepower and RPM to spin the a fan with "x" number of fan blades with fan blade pitch or angle that will pull enough air across the condenser coil to cool the hot refrigerant gas enough so that by the time it reaches the expansion valve it will be in the ideal temperature range to provide maximum cooling in the evaporator coil.

Changing components with unlike replacements creates strain, inefficient cooling and potentially early failure of parts.

May 06, 2014 | Heating & Cooling

1 Answer

Danby DAC10011E 10000 BTU window air conditioner not draining water? does it have some sort of self evaporating technology? I can hear water inside when I turn it on and/or off, but none draining out the...

Hello, some window units do not use a drain tube instead they use the condenser fan blade to scoop the condensate from the bottum of the base pan and splash the condenser coil to keep the condenser cool and also evaporate the condensate. Most of the time you can hear a "swishing sound"

Jun 18, 2012 | Danby Dac10011e 10000 Btu Window Air...

1 Answer

WRS6R3EW8 Refrigerator and freezer not cooling. Evaporator coil 60 deg. only. Compressor, evaporator fan and condenser fan running. Some frost on the tubing coming from condenser at the evaporator. ...

Where is it frosting, condenser or evaporator? If you mean frosting on evaporator line to compressor, probably iced up evaporator. If you mean frosting after condenser by capillary, unit short of gas/ blocked.

Apr 27, 2012 | Refrigerators

1 Answer

The condensing unit is more than 75 feet from the evaperator. In the very hot weather the unit will not cool. Is there a line size increase recommended for this distance?

No. 75' of distance between condenser coil and evaporator coil is not considered abnormal at all. I would look elsewhere for reasons your unit does not cool in very hot weather, i.e., dirty condenser, low charge, improper sizing of AC and cooling space to name just a few.

Jun 10, 2011 | Heating & Cooling

3 Answers

The controll is set at its maximum for cold and its still not cold enough the freezer is not really freezing

Almost defiantly a gas leak. If you can get a look at the evaporator you will probably see frost build up on the inlet tube only. On a fully charged/properly running system there will be a even frost line across the face of the evaporator. The second most likely problem would be a condenser fan motor fault or blocked condenser. FYI (the evaporator is the inside(cold) coil and the condenser is the outside (warm) coil. :-) hope this helps.Brendan (refrigeration technician)

Jan 31, 2011 | Refrigerators

2 Answers

Dometic ac

remove the lower assembly and tighten the bolts that hold ac down to coach or pull shroud and check to make sure unit is not frezing up due to dirt

Jul 13, 2008 | Dometic 57915531 Air Conditioner

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