How should a TXV be mounted?
TXV Bulb Placement
- Mount the bulb on the suction line.
- Mount it TIGHTLY with a proper metallic strap (usually copper, brass, or stainless steel)—not with zip ties or tape.
- Position it on a flat, clean, smooth portion of the horizontal suction line—not on a coupling or an elbow.
Can you mount a TXV upside down?
NOTE: Mounting the TXV in the upright position is preferred. Mounting TXV upside down may increase the chance that debris could deposit on the internal check valve and hold the check valve open during cooling and act as a bleed port.
How do you adjust a TXV valve?
The TXV cannot be adjusted open or closed, it is a modulating valve. Turning the adjustment stem clockwise will only increase spring pressure causing a higher superheat. Turning the adjustment stem counterclockwise will decrease spring pressure reducing superheat.
How do you install a thermal expansion valve?
To adjust the static superheat, turn the valve’s setting stem. Turning clockwise increases static superheat and effectively reduces refrigerant flow through the valve. Turning counterclockwise reduces static superheat and increases refrigerant flow.
Where do you put a TXV bulb?
Sensing Bulb Location — What is the correct position for the TXV sensing bulb? The sensing bulb should be attached at 12 o’clock on any suction line of 7/8-inch diameter or smaller. On lines larger than 7/8-inch diameter, the bulb should be placed at either 4 or 8 o’clock. The bulb should never be placed at 6 o’clock.
What is the best position for mounting the sensing bulb of TXV?
Where should the TXV bulb mounting?
The sensing bulb ships coiled up near the TXV and not installed. The sensing bulb needs to be mounted on a horizontal section of the suction line in the 3-o’clock or 9-clock position. Insulate the sensing bulb thoroughly so that it receives a good temperature signal from the gas in the sensing bulb.
Can a Txv sensing bulb be mounted vertically?
A sensing bulb can be installed on a vertical suction line if necessary, but never place the bulb downstream of a trap. Bulb placement before a trap (upstream) is recommended. Remember, with R-410A, traps are no longer necessary. When putting the bulb on a vertical line — always — TAIL END UP!
Where is Txv valve located?
The TXV Expansion valves reside between the evaporator and condenser in the refrigeration cycle. With the main body made from brass the TXV includes both and inlet and outlet valve. The inlet is located at the bottom while a refrigerator outlet is on the side.