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Which is not a pressure or force on a txv diaphragm?
spring
What are three factors that determine the capacity of a TXV?
The capacity of a TXV differs due to orifice size, pressure difference between high and low side, and the temperature and condition of the refrigerant in the liquid line.
Why low temp rise in cooling mode of heat pump?
COULD BE MANY THINGS- NEED MORE SPECIFICS. MOST LIKELY TXV OR CHARGE ISSUE. IF TEMP RISE GOOD IN H/P MODE W/O STRIP OR SUPP. HEAT ADDED MOST LIKELY TXV. IS OA TEMP AN ISSUE THIS TIME OF YEAR? (LOW HEAD PRESSURE) lc
Why would your air conditioner have normal head pressure and a low suction pressure?
There is no such thing as normal head pressure. It is all based on temperature and calculations. Need to know indoor air temp, outdoor air temp, wet bulb versus dry bulb. Need to know specifics. so when outside ambient temp is 90 and I'm running 255 head with a clean condenser. that isn't normail head pressure? that's pretty normal to me. working with r22 the correct answer would be. If you are sure your head pressure is where it should be, with correct freon type. low suction pressure can be caused by no blower motor, closed or blocked registers, clogged filter or evaporator, lack of airflow, undersized evaperator or oversized AC, restricted metering device(TXV, piston) blocked returns. but he is right you need a lot more info what's your superheat/subcooling? what's your delta T, is you head pressure really wre it should be? what's changed since this started happening. How low issuction pressure what's your evap saturation temp? is coil freezin up? what are your pressures exactly is condenser temp 30 degrees warmer than outside temp. with r22. do you know what you are doing????
Which is not a pressure or force on a txv diaphragm?
spring
When do some txv require an external equalizer?
when exes of pressure drops
What is the purpose of the external equalizer on a TXV?
The purpose of the External equalizer on the TXV is to compensate for the pressure drop in the evaporator coil , This is done since the superheat calculation is based on the difference in the Saturation temperature corresponding to the Suction pressure (Measured after the coil) and the actual suction line temperature. Now, in a TXV measurement of actual line temperature is accomplished by using the Sensing Bulb and the Measurement of the Suction pressure by the External Equalizer of the TXV. The opening/Closing of the Expansion valve is controlled by the setting of the superheat which is governed by the setting of the Spring.
What are three factors that determine the capacity of a TXV?
The capacity of a TXV differs due to orifice size, pressure difference between high and low side, and the temperature and condition of the refrigerant in the liquid line.
What is the different between exv and txv?
Difference between txv and exv.
When a TXV powerhead looses its charge what happens?
The Txv usaully will not let any flow though valve causing low side to pump down or go off on low pressure. Because it is the charge that opens the diaphragm/valve against the spring pressuse (keeps the valve closed) of the TXV, an absense of the charge will allow the spring pressure to keep the valve closed; consequently starving the evaporator coil of a saturated vapor, until the system pulls down into a vacuum. If the system is equiped with a low side pressure switch, the system should go off on low pressure.
What is an evaporation coil with TXV?
The evaporator changes refrigerant from a low pressure liquid to a low pressure vapor, and acts as a heat exchanger, removing heat and humidity from the passenger compartment.
Which side of the ac is the high side on a Chevy Venture?
You'll see two lines coming in and out of the compressor. One will be larger than the other. The compressor splits the low pressure side from the high pressure side. The smaller line will be at the compressor outlet, and that's where the high side of the system begins. From the compressor, the line will go to the condenser. Where the line goes next depends on what type of system you have. If you have a Thermal Expansion Valve (TXV) system, it will go to the receiver-drier. If you have a Fixed Orifice Tube (FOT) system, it will go directly to the FOT from the condenser outlet. On a TXV system, the line will go from the receiver-drier outlet to the TXV inlet. The TXV and FOT are both metering devices which separate the high and low pressure side of the system. The high pressure side ends at the metering device inlet, and the low pressure side begins at the metering device outlet.
Is it ok to undersize a txv?
No, it is not.
How do you change 97 Nissan sentra ac expansion valve and where is located?
The TXV will be located on low pressure side somewhere between compressor and condensor You need to recover the frion from system before servicing the TXV Tip: The compressor is belt driven off the engine and has 2 hoses leadind to it
What is a dual port TXV?
Dual port TXV used when system need a large TXV for short periods of time. Dual-port valves have two independent capacities larger port for periods of high load smaller port for periods of normal load TXV capacity is doubled when larger port is open all the way.
What is meant by a dual-port txv?
step motor
