1.43 Flow Meter Replacement

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.

🚨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 5 thumb nuts:
  • 3 from the left chiller vent
  • 2 from the right chiller vent
• Note: Bottom-right nut may be an 8mm hex nut—use socket if necessary.

Remove Rear Cover

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

Remove E-Box Cover

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

• Unplug & Remove Flow Meter From Ebox

• Using the PCB Board Diagram, locate and unplug the flow meter from the PCB board.
  • NOTE: The flow meter plug is too large to fit through the port with other wires in place, so you'll need to first remove the TH1 thermistor and suction thermistor.
• Unplug the TH1 and suction thermistors from the PCB board.
• Push the TH1 and suction thermistor connectors through the back port of the electrical box.
  • NOTE: Do not pull on the wires. Only push the plastic connectors through to avoid damaging the wires or connections.
• Once those are removed, push the flow meter plug out through the back of the electrical box.
• Leave all three connectors outside the electrical box in preparation for installing the new flow meter manifold.

Cut Zip Ties Securing Flow Meter Wire

• Cut the zip ties securing the flow meter wire to the chiller. 

Disconnect Flow Meter Manifold From Water Filter Housing

• Locate the ab union connecting the flow meter manifold to the back of the water filter housing.
• Unscrew the ab union to disconnect the flow meter manifold from the water filter housing

Remove Flow Meter From Manifold

• Locate the flow meter on the flow meter manifold between the water filter housing and fan.
• Using a phillips head screwdriver remove the two screws securing the cover of the flow meter.
• Using a 3mm hex bolt driver remove the 4 bolts securing the flow meter to the manifold.
• Cut zip ties that are securing the flow meter the the chiller 

Install New Flow Meter to Manifold

• Before installing the flow meter ensure the pin wheel on the back side spins freely without obstruction.
  • NOTE: There is a plastic pin that holds the pin wheel in place. Be careful this does not fall out.
• Using a 3mm hex nut driver install the flow meter into the flow meter manifold.
  • NOTE: The wire should be facing up to the top of the tub when the flow meter is installed
• Using a Phillips head screw driver install and secure the flow meter cover to the flow meter.

Install & Plug In Flow Meter to Ebox

• Feed the flow meter, water temp thermistor, and suction thermistor wires through the back of the electrical box.
  • NOTE: The flow meter must go first due to the size of the connector.
• Refer to the PCB board diagram and plug each wire into the correct port:

Secure Flow Meter Cord Using Zip Ties

• Secure the flow meter wire to the other cords along the top of the fan. 

Connect Flow Meter Manifold From Water Filter Housing

• Connect the flow meter union to the back of the water filter housing connection.

⚠️ Important: Hand tighten only, tools will damage the union. If the union is difficult to screw on back out as it can be cross threaded.

Test for Leaks & CF Error Code

• Fill the Plunge up with water so the water line is 6" below the edge of the tub.
• 🚨 Open the auto-doser ball valves🚨
  • ⚠️ If chiller is turned on while auto-doser ball valves are closed it can damage the chiller.⚠️
• Plug in the Plunge and press the “Reset” button on the GFCI plug to power it on.
• Set temperature to 50 degrees so pump powers to 100%.
• Allow the Plunge to run and observe the chiller plumbing union connections.
• Carefully inspect all union fittings for any signs of leaking while the system is running.
• If a leak is found, pause the system and recheck that the union is properly seated and hand-tightened.
• Confirm no "CF" error code on UI

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.

Prepare for Rear Cover Installation

• Reattach e-box cover (4 screws).
• Secure chiller to frame using the 4 base nuts.
• Pre-install the upper thumb nut (near filter housing) loosely—this area is tight with cover on.

Install Rear Cover

• Carefully slide rear cover over chiller.
• Ensure power cord is routed through the correct side.
• Reinstall all 5 thumb nuts to secure rear panel.
• Attach the left and right chiller vents.