TXV Bulb Placement


When mounting a TXVbulb or checking bulb placement there are a few important considerations (listed in order of importance)

  1. Mount the bulb on the suction line. Flapping in the breeze is no good.
  2. Mount TIGHTLY it with a proper metallic strap (usually copper or brass). Not zip ties, not tape.
  3. Position it on a flat, clean, smooth, portion of horizontal suction line. Not on a coupling or an elbow.
  4. Mount it before the equalizer tube (closer to the evaporator than the EQ tube)
  5. When possible mount it at 8 or 4 o’clock on the suction line (or according to manufacturers¬†specs) . This becomes more important the larger the suction line.
  6. When possible, insulate the bulb so that it is not influenced by ambient air temperature.

Finally… be gentle with the bulb and tube. They break easily.

You can read a more detailed description HERE

— Bryan

One comment

  1. Benoit Mongeau says:

    Good tips, but it might be worth mentioning that some manufacturers recommend in their literature to relocate the bulb outside the plenum/cabinet.

Leave a Reply

Scroll to top

Daily Tech Tip

Subscribe to our daily tech tip to receive daily tips and advice!
Email address
Name