Buffer Tank Pressure Sensor Remove & Replace, CT 1.5 (Compact Chiller)

Overview

This guide will walk you through the step by step process to remove and replace the Buffer Tank Pressure Sensor in the Countertop 1.5 Compact Chiller.

In this article (click to jump)

• Task 1: Depressurize the water system.
• Task 2: Power Off the Bevi.
• Task 3: Remove the chiller from the cabinet.
• Task 4: Remove the left and right side panels.
• Task 5: Remove the Buffer Tank.
• Task 6: Remove the Buffer Tank Pressure Sensor.
• Task 7: Install the new Pressure Sensor.
• Task 8: Reinstall the Buffer Tank.
• Task 9: Test for Leaks.
• Task 10: Reinstall the Chiller.
• Task 11: Fill the Buffer Tank and Ice Bank.

Required Tools & Parts

• Part #720-0336 FRU - BUFFER TANK PRESSURE SENSOR
• #2 Phillips Head Screwdriver
• Small Flathead Screwdriver
• Flush cut pliers or utility knife
• Needle Nose Pliers
• Small bucket or collection container
• 24” zip tie, or multiple smaller zip ties for an equivalent length. 

Remove and Replace Procedure

Task 1: Depressurize the water system.

1. Turn off the water source to the Compact Chiller.
2. Open the front access panel on the chiller.
3. Drain the Buffer Tank.
   1. Ensure the Buffer Tank valve is in the open position.
   2. Remove the Filter Flush tube from the clips and direct it into a bucket,
   3. Open the Filter Flush Valve and drain the Buffer Tank until it is completely empty.

4. Once fully drained, close both the Buffer Tank and Filter Flush valves, and replace the Filter Flush tube into the clips.

5. Navigate to the Troubleshooting Tools screen.
   1. Touch the service icon in the upper left corner.
   2. Touch "Start Service"
   3. Enter the PIN to access the service panel.

6. On the left side of the screen, touch "Machine Alerts".
   1. Touch "Troubleshooting Tools"

7. Place a container under the nozzle, and pour COLD water until water is no longer dispensing.

Task 2: Power Off the Bevi.

1. Power off the Bevi using the power switch on the front of the chiller.
2. Disconnect the power cord from the back of the chiller.

Task 3: Remove the chiller from the cabinet.

1. Carefully lift the front of the chiller so the locating tabs on the bottom can come up and out of the ventilation holes.
2. Slide the chiller forward so the front hangs over the edge of the cabinet.

NOTE: Avoid spilling any water from the ice bank by taking extra care to keep the chiller flat and level, and minimize any excess handling.

2. Remove the red locking clip and disconnect the 3/8" water in tube from the back of the chiller.
   1. NOTE: This step may not be necessary if there is enough slack on the water line to fully remove the chiller without putting tension on the tubing.

4. Lifting from the front and the rear grab handle, carefully lift the chiller out of the cabinet and place on the floor.

Task 4: Remove the left and right side panels.

1. Using a #2 Phillips screwdriver, loosen the two screws at the top of each panel.
2. With the screws fully loosened, slide the panels up and out to release the locating tabs at the bottom.
3. Place the panels to the side.

Task 5: Remove the Buffer Tank

1. Using flush cut pliers or utility knife, cut the zip tie securing the buffer tank to the bracket.
   1. This allows for some movement of the buffer tank to more easily access the tubing connection.

2. Remove the red locking clip from the push to connect fitting at the bottom of the buffer tank.
   • TIP: Needle nose pliers can be helpful to grab and remove the clip.
3. Disconnect the 1/4" stem elbow from the push to connect fitting at the bottom of the buffer tank.

4. Remove the buffer tank from the chiller.
5. Remove the old cut zip tie from the buffer tank bracket.

Task 6: Remove the Buffer Tank Pressure Sensor.

1. Using needle nose pliers, grab and remove the red locking clip from the tee fitting.
2. Disconnect the Buffer Tank tube from the tee.

3. On the left side of the chiller, locate the Buffer Tank Pressure Sensor below the Demand Pump.
4. Depress the lock latch to release the connector, and disconnect the cable from the sensor.

5. Using a flathead screwdriver, carefully pry the pressure sensor to the left and out of the plastic housing.
   • Removing this sensor requires a fair amount of physical force. Exercise caution during removal.
6. Once the sensor is released from the housing, carefully work the tee fitting and stem elbow through the hole, and remove the assembly from the chiller.
   • TIP: You can reach your finger through above the housing to help guide the fittings out.

Task 7: Install the new Pressure Sensor.

1. Disconnect the old sensor and 1/4" tubing from the Tee fitting.
2. Connect the replacement buffer tank sensor and tubing to the Tee fitting.

3. Carefully feed the stem elbow and tee fittings through the sensor housing into the chiller.
4. Carefully push and rotate the sensor clockwise up into the plastic housing until it pops into place.

5. Reconnect the sensor cable.
   1. Ensure the connector fully seats in and clicks into place.

6. From the right side of the chiller, connect the buffer tank tube to the Tee fitting.
   1. There should be an insertion marking on the tube, ensure that the tube is fully seated into the push to connect fitting.
   2. Using needle nose pliers, reinstall the red clip.

Task 8: Reinstall the Buffer Tank

1. Feed the supplied large zip tie through the slots in the metal mounting bracket behind the buffer tank.

2. Insert the buffer tank back into the chiller in the mounting bracket.
   1. Do not secure the buffer tank in place with the zip tie at this time.

3. Reconnect the stem elbow to the push to connect fitting at the bottom of the buffer tank.
   1. Ensure the stem is fully pushed into the fitting.
   2. Reinstall the red locking clip.

Task 9: Test for Leaks

1. At this time, it is recommended that you test the system for leaks prior to fully reinstalling in the cabinet.
2. If it was disconnected during removal, reconnect the 3/8" water supply tube.
   1. Ensure the tubing is fully seated into the push to connect fitting.
   2. Reinstall the red locking clip.
3. Reconnect the chiller power cord.
4. In the front access panel, open the buffer tank valve.

Note: Confirm that the Filter Flush valve is in the closed position.

5. Power on the chiller.
6. Once the chiller is powered on, the water system should begin to fill.
   1. Inspect all tubing and fittings to ensure there are no leaks present.
   2. If there are leaks, turn off the water supply and buffer tank, and power off the chiller.
   3. Inspect all fittings to ensure tubing connections are fully seated.
7. If no leaks are present, continue to Task 10.

Task 10: Reinstall the Chiller.

1. Secure the zip tie around the buffer tank.
   1. If necessary, use a pair of pliers to firmly grasp the zip tie and tighten as much as possible.
   2. Cut any extra length of the zip tie with a cutting tool such that the tail of the zip tie does not obstruct the side panel of the compact chiller.

Ensure the head of the zip tie is out of the way of the side panel before fully tightening it.

2. Reinstall the side panels.
   1. Take care not to pinch any wiring in the panels.
   2. Ensure the locating tabs slot into place
   3. Tighten the screws to secure the panels.
3. Carefully lift the chiller into place in the cabinet.
   1. Ensure the locating tabs on the bottom of the chiller fit into the ventilation holes and the chiller sits flush on the base of the cabinet.

NOTE: Avoid spilling any water from the ice bank by taking extra care to keep the chiller flat and level, and minimize any excess handling.

Task 11: Fill the Buffer Tank and Ice Bank.

1. Once the chiller is reinstalled, navigate back to the troubleshooting tools menu.
2. In the front access panel, confirm the buffer tank valve is in the open position.

Note: Confirm that the Filter Flush valve is in the closed position.

3. Confirm the water source is turned on.
4. From the "Water" controls menu, open the inlet solenoid.
   1. This will allow water to enter the chiller and fill the buffer tank.
   2. While filling the buffer tank, observe the internal water pressure increasing in the Data section.
   3. Once water pressure has stabilized, the buffer tank should be full.

5. Confirm the Ice Bank is full.
   1. After removing and reinstalling the chiller, it is possible the ice bank is no longer full.
   2. In the Chiller Data section, confirm that Chiller "Full" reads YES.
   3. If the chiller is not full, press "Start" in the Chiller Controls menu to fill the ice bank.

6. Once the Buffer Tank and Ice Bank are filled, test the functionality of the Bevi.
7. Dispense both Cold and Sparkling water to verify they are working properly.
8. Press "Back" at the top right corner of the screen to exit the Troubleshooting Tools menu.
9. Be sure to resolve any machine alerts that may have fired while servicing the machine.

If you have any questions or need further assistance, please contact Bevi Technical Services at support@bevi.co, or call our support line at 866-704-2384 (BEVI)