Skip to main content

All-In Commercial Max Gen 2 - (TH-7) Replacement

Updated

Tools Required

  • 8mm socket

  • 10mm socket

  • 2.5mm hex driver

  • Flathead screwdriver

  • Zip ties

  • Utility knife or snips (for cutting zip ties)

  • Protective gloves

  • Towels

Job Checklists

  • Arrival Checklist
  • All-In Commercial Max Gen 2 Compressor Discharge Thermistor (TH-6) Replacement Checklist
  • End of Job Checklist

All-In Commercial Max Gen 2 Compressor Discharge Thermistor (TH-6) Replacement Prep

Power Down The Plunge

  • Pause the chiller by pressing the pause button on the UI
    • ⚠️ Powering down the Plunge while it's in a cooling cycle can damage the chiller.
  • Press the test button on the GFCI outlet to power down the Plunge.
  • Unplug the GFCI outlet from the outlet.

🚨 Important: Do not power down the Plunge before pausing the chiller.

Only Needed for Commercial Units
🚨Close Auto-Doser Ball Valves🚨

  • Close the two auto-doser ball valves (perpendicular to the piping).
  • Important note: Not closing the ball valves will cause the auto-doser probe to dry out and need a recalibration.

Drain The Plunge

  • Remove the right ventilation screen. Opposite of the filter housing.
  • Locate the main drain manifold at the bottom and remove the cap from the spigot.
  • Attach a garden hose or inline pump to the spigot
  • Turn the valve on the spigot and the water should flow out
  • Turn the valve to close the spigot and install the cap back on.
 

Remove Chiller Vents and Thumb Nuts

  • Remove both chiller vent panels.
  • Unscrew all 4 thumb nuts
    • 2 just inside the left vent screen
    • 2 just inside the right vent screen
 

Remove Rear Cover

  • Slowly pull and wiggle the rear cover out through the vent openings.

Remove Chiller Mounting Nuts

  • Using a 10mm socket remove the 4 nuts securing the chiller to the base frame:

    • 2 on each side of the chiller base.

Remove E-Box Cover

  • Use a 2.5mm hex screwdriver to remove the 4 screws securing the e-box cover.

TH-7 Replacement Instructions

Before starting, disconnect power using the manufacturer's safety procedure. Allow hot components to cool before handling.

Step 1: Locate TH-7

Find the TH-7 sensor on the copper piping between the compressor and condenser. The red arrow identifies its location.

TH-7 sensor location, marked with a red arrow.

TH-7 sensor location, marked with a red arrow.

Step 2: Remove the sensor

Carefully pull TH-7 out of its socket. Leave the metal retaining clip inside the socket.

Before removal: Sensor seated in its socket.

Before removal: Sensor seated in its socket.

After removal: Sensor removed from its socket.

After removal: Sensor removed from its socket.

Step 3: Disconnect the old sensor

Follow the TH-7 wire into the electrical box (Ebox). Note the wire routing and connector location, then unplug the sensor connector from the circuit board (PCBA).

Electrical-box routing reference. The circuit-board connector is not visible in this photo.

Electrical-box routing reference. The circuit-board connector is not visible in this photo.

Step 4: Connect the replacement

Plug the new TH-7 connector into the same circuit-board connection. Feed the new sensor and wire out of the electrical box, following the original routing shown above.
Gen2 board.jpg

Step 5: Install the new sensor

Insert the replacement TH-7 into the original socket, keeping the metal retaining clip in place. Check that the sensor is securely seated.

Installed-position reference; the original sensor is shown.

Installed-position reference; the original sensor is shown.

Step 6: Check and finish

  • Confirm that the circuit-board connector is secure.
  • Check that the wire is not pinched or touching moving parts.
  • Reinstall any removed covers.
  • Restore power according to the manufacturer's procedure.


 

 

 

Related articles

Comments

0 comments

Please sign in to leave a comment.

Powered by Zendesk