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Would the condenser have more or less subcooling if the unit had an overcharge of refrigerant?
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After heat is absorbed into a condenser medium in a water cooled condenser the heat can be deposited in one of two places what are they?
There is only one condenser. That would be an air condenser.
What kind of head pressure would you see if the condenser fan became inoperative?
Very high
Which type of current does a windmill produce?
Direct current as would a magneto. For this reason it can be used with an integrated battery-condenser plant which would keep things going during slack periods.
What percent vapor is refrigerant when entering the evaporator?
because of flash gas the amount of liquid entering the evaporator would be 75 % liquid and 25% vapour
What happens to the freon in the condenser?
well it condenses, hence the name condensor. but if you are having to "recharge" your system then basically you have a leak that either needs to be repaired or replace the unit.for the techinical answer to your actual question, the refrigerant is condensed by means of removing heat from the refrigerant basically taking a high pressure high temperature gas and condensing it into a high pressure liquid. I'm guessing that you are referring to having to call a service company to recharge your unit on a regular basis, if that is the case you will like I said need to have the leak repaired (depending on the age of the unit) or purchase a new system (which if your unit is more that 10-15 years old that is what I would recommend.)my experience is in the HVAC/R field (commercial refrigeration) not the residential stuff that sears hires crackeads off the street to repair.
What is meant by degree of subcooling?
The degrees (temperature) from the saturated liquid line. One example would be after refrigerant goes through a condenser. T_subcooling = T_sat - T_condenser
Why would you run high head and normal suction pressures?
Dirty condenser coil, high ambient temperature, problem with condenser fan, overcharge, non condensibles, high indoor load are the first places I would look. In that order.
Why would outside condenser be making an intermittent roaring noise?
The compressor may have a locked rotor in the condenser causing the loud roaring noise. Another possibility is low refrigerant.
The high side pressure on your auto ac is reading over 400 psi when the ac is on what could be the cause?
A defective fan control, broken fan belt, dirty or blocked condenser coil, incorrect refrigerant, refrigerant overcharge and also the fact that the car is not moving and the hood is open while you are checking it causes the ac system to lose the benefit of the airflow it would normally have by forward movement. 400 psig is way too high.
How would the compressor housing feel when a unit has an overcharge of refrigerant?
A refrigerant compressor will be hot when running whether or not the charge is too high or too low. If the charge is too low, the compressor will cycle on and off. If too high the compressor may not run at all.
What is the principal of cascade refrigeration system?
To condense refrigerants that are capable of achieving ultra low temperatures that would not be able to condense at room temperature. This is achieved by using a low temperature evaporator of one system as the condenser the other, condensing and subcooling the liquid before entering the metering device.
What kind of head pressure would you experience if the condenser motor became inoperative?
The compressor would continue to operate until the high pressure safety switch shut it down, if the switch failed the pressure relief device would blow and you would lose all of the refrigerant. As far as how high would the pressure get, the settings on the two devices depend on what type of refrigerant is used and you do not mention that.
What does an air conditioning condensor fan do?
The condenser fan moves air across the hot condenser coil. This transfers heat from the hot refrigerant to the cooler ambient air. A fan is not required, but the heat transfer surface would have to be multiple times larger to cause the needed amount of heat transfer.
Which journal would be adjusted for an overcharge a creditor be recorded?
general
What would cause the battery to overcharge?
Defective voltage regulator.
How can you safely do a pump down procedure on a home split cycle air conditioning system and what tools would you need?
I think you mean a split system ac unit, not a split cycle.You will need a set of refrigeration gauges and a means of closing whatever types of service valves are on your unit. You will also need to know what order in which to close those valves and what the readings on the gauges are telling you. The pumpdown procedure only takes a couple of minutes, so call a tech for the 1 hour service call. Then call him back to do a proper restart. You cannot Safely do it.The process of doing this may sound complicated but it is easy for a technician.There are two valves at the condenser, one valve for the suction line and one valve for the liquid line. The HVAC technician closes the liquid line valve and turns the air conditioning on. The compressor pumps all the refrigerant into the condenser coils. The HVAC technician watches his gages carefully and when the pressure gets to zero on the gages he quickly closes the suction line valve to trap the refrigerant in the condenser and then turn the compressor off. This saves using refrigerant unnessarily because the same refrigerant in the system can be reused for the new evaporator coil or air handler. After the new evaporator coil or air handler is installed the HVAC technician evacuates the new part of the system and when completed with the evacuation process opens the valves to allow the refrigerant into the new part of the system. To make sure the charge is correct he uses his gages and the superheat method or subcooling to ensure the proper amount of refrigerant is in the system.
Does the refrigerant always need recharging when a rooftop condenser unit is replaced?
No, the new condensing unit comes precharged. Once the piping is connected to the new unit , the piping and evaporator coil only needs to be evacuated then open the valves on the new condenser. The condenser comes charged with the proper amount of refrigerant for a 50`or less run of pipe (one way). Longer piping runs may require a small amount of additional refrigerant. But, I have heard recently some supply houses are now selling new R-22 condensers without the precharge (in order to circumvent the EPA regulations regarding R-22). But I would guess that is rare and is with new R-22 units only.
