When the air conditioner is detached or is transferred, the down of the pump of the refrigerative gas (collection) is necessary. Otherwise, the gas is discharged into an atmospheric inside. When installing it again, it costs useless cost to charge the gas. So as not to discharge the gas into the atmosphere when the air conditioner is detached, the gas is collected to the outdoor machine. This is called a down of the pump. It introduces the general correct method. When the pump can be downed by this method, the refrigerant oil can be collected in piping almost completely. If it is this method, you seem may divert piping though the piping of the model that uses the refrigerative of HCFC-R22 is supposed not to be able to be usually diverted to the model of new refrigerativeHowever, piping is two-kind copper pipe (highest use pressure 4.30MPa) for R410A, and should not have remarkable deterioration. And, it is a self-responsibility though admits the manufacturer according to the model.

If piping is not diverted, it should not be driving of about 15 minutes. Moreover, the pressure of the service port that adheres to a fat pipe closes the down of the pump and when it becomes it (about one minute), 0.1MPa(1kgf/cm^2) closes the valve on a fat pipe side as follows. It is not necessary to do untilAir may not enter the pipe when making it to the vacuum(The driving time of the compressor is adjusted to about 45 seconds when there is no pressure gauge. The compressor stopped and there was a breaking thing when lengthening it too much. The trial run switch is turned on according to the model. There is a model that cannot drive air-conditioning at cold time. time, the room temperature sensor of the indoor unit (thermistor) is warmed withIt goes well even if it does by the thermistor part's warming the patty and coming by it. When the air conditioner is detached, air-conditioning might not be able toThat time introduces the method devised by me.

However, even if the equipment breaks down, I do not assume the responsibility as a result becauseair conditioner window unit freezing this method is an irregular method. commercial air conditioning unit pricePlease do in own responsibility.carrier ac unit repair It seems to be able to collect the refrigerative gas without trouble by thisThough it leaks just a little. The kind of the gas used with a domestic air conditioner is as follows. hardly sold that the thing of mixed refrigerants of HFC-R410A (new refrigerative) uses HCFC-R22 in the main current recently. We are planning on having a new concrete patio poured in a couple of weeks and need to move our AC unit to make way for the slab. Is it possible for a layman to pump down the coolant and move the unit or do I need to pay someone to do this for me?

Unless you are an abnormally equipped layman, no. Even then, there may be a legal requirement (depending where you are) for this to be done by a licensed A/C service person, as regulations around refrigerants have become much more stringent over the years, trying to limit uncontrolled releases to atmosphere. The hard part actually isn't pumping down the vacuum on the AC, the hard part is recovering the refrigerant. Auto parts stores will loan you a vaccum pump that will work on a house AC, but this won't allow you to recover the refrigerant. Recovering the refrigerant requires specialized equipment that's quite expensive. Discharging the refrigerant to the atmosphere is definitely illegal.Browse other questions tagged hvac air-conditioning or ask your own question.How Can B-Y Help? Have B-Y contact you Why Do We Use A Pump Down System? An outdoor refrigeration condensing unit will normally operate no mater how cold it gets outside. If the room thermostat simply de-energized the contactor to cycle the compressor off we would run into refrigerant migration problems.

During cold winter months the refrigerant will “migrate” to the coldest place in the system. The coldest place is the outdoor condensing unit and compressor. The refrigeration oil in the compressor is “miscible” with the refrigerant which means they mix well. The liquid refrigerant will mix with the compressor oil or collect underneath it in the compressor crank case. When the compressor starts and the liquid refrigerant leaves the compressor the oil will leave with it. Liquid slugging and lose of oil may be the result. In a pump down system, the room thermostat closes a solenoid valve that is located in the liquid line. When the room thermostat is satisfied the solenoid valve will close stopping the liquid refrigerant flow to the TXV. The compressor will continue to operate until most of the refrigerant in the low side boils off and is pumped through the compressor into the condenser and receiver. As the suction pressure falls below the low pressure control setting the compressor will cycle off.

Most of the refrigerant is now stored in the condenser and receiver. A crank case heater will prevent the small amount of vapor that’s left from condensing in the compressor oil. When the room thermostat calls for cooling again, the solenoid valve energizes allowing refrigerant to flow to the TXV. As the suction pressure rises the low pressure switch closes and starts the compressor. If a defrost timer or pump down switch is utilized on the system they should be wired in series with the thermostat so that the system will only shut off after pumping down. The solenoid coil, defrost timer and room thermostat can be powered from the evaporator so no electrical between the indoor and outdoor units may be required. Multiple evaporators can be connected to one condensing unit. All of the evaporators may operate off one solenoid valve or each evaporator may have its own solenoid valve and thermostat. Commercial Refrigeration Condensing Units The Tecumseh DifferenceWhile all condensing units are an assembly of a compressor, condenser, fan motor, controls and a mounting plate, not all are created equal.

Here is why Tecumseh condensing units are a cut above. • Ranging from 1/6 hp to 10-3/4 HP, Tecumseh’s full line of Commercial Refrigeration condensing units use industry recgnized, performance proven Tecumseh compressors • Tecumseh's line of Celseon fractional horsepower condensing units are loaded with installer-friendly features • All Tecumseh condensing units are 100% leak and run tested (not all condensing unit manufacturers can say this), pressurized with non-refrigerant holding charge; • Tecumseh supports its customers with a strong warranty program • A knowledgeable technical support team is available to answer all your questions • Tecumseh offers a full line of condensing units, matching unit coolers, service parts and accessories AJ Large Pump Down Condensing Unit Resources As a complement to the existing line of Celseon Air-Cooled Condensing Units, Large Pump Down models offer an oversized receiver tank for added refrigerant storage to accommodate a larger refrigerant charge and/or longer line set lengths.