1.32 to 1.43 Flow Meter Retrofit

Power Down 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.
• Once the chiller is in idle mode 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. Powering down the Plunge while it is in a cooling cycle can damage the chiller.

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 side chiller vent panels.
• Unscrew all 6 thumb nuts securing the rear panel:
  • 3 on the left vent
  • 3 on the right vent

Remove Rear Cover

• Grab the rear cover by the vent openings and slowly pull and wiggle the rear cover free. 

Disconnect Electrical Components

• Disconnect all electrical components by unscrewing the threads and pulling.
• The LED wire should be moved to the back of the chiller and set aside.

Remove E-Box Mounting Nuts

• Cut 2 zip ties securing the power cord to the frame near the electrical box.
• Using an 8mm hex driver, remove the 4 mounting nuts securing the e-box to the tub.

Move E-box Behind TH-1 Manifold

• After removing the 4 mounting nuts, gently lower the e-box from its mounted position.
• Pull the TH-1 manifold forward slightly to create room behind it.
• Carefully move the e-box behind the TH-1 manifold.
• Once positioned, allow the e-box to rest securely behind the TH-1 manifold against the tub basin.

🚨Make sure the UI ribbon cable and other wires do not snag or catch on any components.

Disconnect Ribbon Cable from UI

• Locate the ribbon cable connected to the back of the UI.
• Push the wing tabs on the ribbon cable connector apart—one up and one down—to release the cable.
• Gently remove the ribbon cable from the back of the UI.

Remove E-Box

• Cut zip ties that are securing the electrical box to the frame of the tub if needed.
• Move the electrical box back to the top of the chiller cabinet on the mounting nuts. 
• Push the TH-1 manifold back until it is against the basin of the tub.
• Tilt the e-box towards you, slowly and carefully slide the e-box out of the chiller cabinet between the top of the fan and the bottom of the tub.

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

NOTE: If a hand tool is necessary to unscrew ab union you must use soft tip pliers. 

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 

Extract Failed Flow Meter From E-Box

• Using a 2.5mm hex bolt driver remove the cover of the E-box
• Locate the wire coming out of the back of the flow meter bulkhead and cut the wires flush to the bulkhead using wire cutters.
• Disconnect the flow meter from the PCB board by pushing the tab and pulling
• Remove the flow meter wire from the E-box

Install 1.43 Flow Meter to E-Box

• Thread the flow meter connector through the ribbon cable slot in the e-box cover.
• Plug the flow meter into the PCB board.
• The flow meter plugs into the connection to the right of the fan. 
• Place the e-box cover back on and secure it with the bolts using a 2.5mm hex bolt driver.

Insert Ebox & Maneuver To Behind The Water Thermistor

• Slowly and carefully slide the E-box between the top of the fan and the bottom of the tub 
• Place E-box on mounting screws
• Slide TH-1 manifold forward up against the condenser fan
• Slowly and carefully slide the E-box behind the TH-1 manifold up against the tub basin. 

Connect Ribbon Cable to UI

• Retrieve the UI ribbon cable from the electrical box.

• Position the ribbon cable so that the red stripe is facing down.

• Insert the cable into the connector on the back of the UI.

• Once the cable is fully inserted, secure it in place by closing the wing tabs around the ribbon cable.

• Double-check that the connection is snug and properly aligned.

Mount & Secure E-box

• Carefully lift and maneuver the e-box back onto the mounting bolts at the top of the chiller cabinet.

• Align the e-box with the bolt pattern on the frame and gently seat it into position.

• Hand-thread all four 10mm mounting nuts onto the bolts to hold the e-box in place.

• Once all nuts are hand-tightened, use a hex driver to securely tighten each one.

• Confirm the e-box is firmly mounted and does not move or wobble

Install 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.

Secure Cords Using Zip Ties

• Secure E-box cord to tub frame with zip ties if you cut them earlier
• Secure the flow meter wire to the other cords along the top of the fan. 

Connect Flow Meter Manifold to Water Filter Housing

• Screw the flow meter manifold ab union to the water filter housing.

NOTE: Do not use tools to tighten union. This will damage the unions. 
NOTE: If union does not screw on easily it is most likely cross threaded. Back out and try again.

Test for Leaks & CF Error Code

⚠️ Warning: The chiller fan is exposed during testing. Keep hands, tools, and loose items away from the fan to avoid injury or equipment damage.

• 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.

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

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.