Overview

This guide will walk you through the step by step process for removing the Gen 1 CO2 regulator, and replacing it with either the same Gen 1 regulator assembly, or upgrading to a Gen 2 CO2 regulator assembly.

Gen 1 CO2 Regulator for Standup 2.0	Gen 2 CO2 Regulator for Standup 2.0

The CO2 Assembly is at the plumbing shelf in the back side of the Bevi Standup 2.0.

Required Tools & Materials

• #2 Phillips screwdriver
• Large adjustable wrench
• 3/8” Combination wrench or socket wrench
• Flush cut cable snips
• Zip ties
• Small bucket
• Spray bottle with soapy water solution

Removing the CO2 Regulator Assembly

Task 1: Enter the Service Panel to open the door to the Bevi 2.0

1. Touch the Service button in the top left corner of the main dispense screen.
2. Touch "Start Service" on the right side of the screen.
3. Enter the access code “1986”.
   1. The door should open.  If it doesn't, press the “Open Door” button at the top right of the service panel.

Task 2: Disconnect CO2 tank

1. Once the door is opened, locate the CO2 tank.  
   • CO2 tank is located inside the door at the base of the machine
2. Turn off CO2 tank
   • Turn tank valve clockwise to turn off
3. Using and adjustable wrench, disconnect high pressure hose from tank

Task 3: Access the Troubleshooting Tools menu

1. From the main Service Panel screen, press the “Machine Alerts” button
2. On the lower left hand side of the Machine Alerts screen, press “Troubleshooting Tools”

Task 4: Depressurize the CO2 Regulator Assembly

1. In the Troubleshooting Tools menu, locate the Dispense controls in the lower left corner
2. Place a small bucket under the dispense nozzle
3. Press and hold the “POUR” button for sparkling water
4. Pour about 1 Liter of sparkling water
   • This will depressurize the CO2 supply, to make it easier to disconnect the tubing from the push-to-connect fitting on the CO2 assembly

Task 5: Power off and remove both the top and center panels from the back of the Bevi 2.0

WARNING
	HAZARDOUS VOLTAGE (120 V / 240 V). CONTACT MAY CAUSE ELECTRICAL SHOCK AND INJURY.  DISCONNECT POWER BEFORE SERVICING.

1. Power off the Bevi
   • At this point you will be working closely around some delicate electronics inside the machine. It is important the machine is turned off for safety and to avoid damaging any electrical components.  
2. Loosen the #2 Phillips screws in the corners of the panels.
   • You do not need to fully remove the screws, only loosen a few turns.
3. Once loose, you can lift the panels up and off of the mounting screws.

Task 6: Disconnect the CO2 tubing from the CO2 Regulator Assembly

1. Remove the locking clip from the push-to-connect fitting
2. Disconnect the ¼” CO2 tubing from the Regulator Assembly

Task 7: Disconnect the CO2 Pressure Sensor wiring

1. Disconnect the CO2 Pressure Sensor cable from the BUC Board
   • The Pressure Sensor connector is located along the bottom, far right corner of the BUC Board.
   • Cut any zip ties securing the Pressure Sensor cable
     • The Pressure Sensor cable runs from the CO2 assembly up to the BUC Board.  
     • Cut zip ties securing the Pressure Sensor cable to any other wiring
     • Pull the Pressure Sensor cable through the access hole 

NOTE: BE EXTREMELY CAREFUL NOT TO CUT OR DAMAGE ANY WIRING

Task 8: Removing the CO2 Regulator Assembly

1. Remove mounting hardware for CO2 Regulator Assembly
   • The CO2 Regulator Assembly is secured with two P-Clamps, attached to the chassis with two 3/8” nylock nuts
2. Using a 3/8” wrench or socket, remove the two nuts holding the p-clamps to the chassis
   • Note the orientation of the p-clamps for reinstallation
3. Once mounting hardware is removed, the CO2 Regulator Assembly can be removed by carefully pulling the CO2 assembly out from the back of the machine
   • Note the routing of the high pressure CO2 hose for reference during reinstallation

Installing the new CO2 Regulator Assembly

Task 9: Identify which version of the CO2 Regulator Assembly you are installing. 

1. If you are installing a replacement Gen1 CO2 Regulator Assembly, continue to Task 10. 
   • The Gen 1 Regulator will have a grey high pressure hose, with the Anti-Kink Spring on the regulator end, next to the pressure sensor.  

2. If you are installing an updated Gen 2 CO2 Regulator Assembly, skip to Task 11. 
   • The Gen 2 Regulator will have a black high pressure hose, with the Anti-Kink Spring on the end of the hose at the tank connection.  

Task 10: Installing Gen 1 CO2 Regulator Assembly

1. Feed the high pressure hose through the access hole to the front of the machine
   • The high pressure hose fits through between the chassis and the buffer tank
   • Feeds out the front of the machine from access hole behind the filter

2. Mount the new CO2 Regulator Assembly to the chassis.
   • Install the new p-clips onto the CO2 Regulator Assembly.
   • Mount the p-clips onto the threaded studs in the chassis.
     • The CO2 Regulator assembly should “hang” from the studs.
     • NOTE: Installing the hardware upside-down will cause the CO2 supply tube to be too short.
3. Reinstall the two 3/8” nylock nuts, and tighten.

4. Reconnect CO2 Supply Tube.
   • Connect 1/4” CO2 supply tube to the CO2 Regulator. 
   • Ensure that the tubing is fully seated into push-to-connect fitting.
   • Reinstall red locking clip.
5. Reconnect pressure sensor cable.
   • Route the new cable through the access hole to the BUC Board.
   • Plug pressure sensor connector into the BUC Board.
   • Ensure connector is fully seated and clicks into place.
   • Install new zip ties to secure cabling.

6. Connect the high pressure hose to the CO2 tank.
   • The replacement Regulator already has a new CO2 washer installed in the tank connection, do not add an additional washer.
     • If there is no washer present, install a new washer (white, Gen 1 spare part 720-0143).
   • Tighten the high pressure hose onto the CO2 tank
7. Turn the tank valve counter clockwise to open the CO2 tank.
8. Once the CO2 Regulator is installed, continue to Task 12.

Task 11: Installing Gen 2 CO2 Regulator Assembly

1. Feed the CO2 tube through the existing access hole through the front of the machine.
   • Remove the beaded zip tie securing the washers and instruction card from the high pressure hose. 
   • The high pressure hose fits through between the chassis and the buffer tank.
   • Feeds out the front of the machine from access hole behind the filter.
   • Once the hose in in place reinstall the beaded zip tie with washers and instruction card.  

2. Using a 3/8” socket, attach the metal bracket with the two 10-32 nuts provided with the assembly.

3. Remove the old 1/4” CO2 In tubing from the Chiller. 
   • The old tube will be too short when using the Gen 2 Regulator.  
4. Connect the 1/4” tubing already connected to the new Regulator to the CO2 In fitting on the Chiller.
   • Ensure that the tubing is fully seated into push-to-connect fitting.
   • Reinstall red locking clip.

5. Reconnect the pressure sensor cable to the BUC board.
   • Ensure connector is fully seated and clicks into place.
   • Secure the pressure sensor cable with 2x zip ties as shown in the images below. 

6. Reconnect high pressure hose to CO2 tank.
   • The replacement Standup 2.0 Gen 2 CO2 Regulator Assembly includes 6x replacement CO2 washers. 
     • The updated washer is GREEN, with a smaller inner diameter than the Gen 1 washer..  
     • You MUST use the green washer when installing the Gen 2 Regulator.
     • Insert one of the provided CO2 washers into the high pressure hose fitting.
7. Tighten the high pressure hose to the tank.
8. Once the CO2 Regulator is installed, continue on to Task 12. 

Task 12: Power on the Bevi

1. Now that we have completed the work inside the Bevi, it is safe to power the machine back on.

Task 13: Confirm that you have adequate CO2 pressure

1. Once the new CO2 Regulator Assembly is fully installed and pressurized, it is important to check the system for any leaks and that the pressure sensor is working properly.
2. With the CO2 tank turned on, check the the CO2 pressure reading.
   • Locate the “Data” section of the Troubleshooting Tools menu.
   • In the “Chiller” data, you will find the CO2 pressure reading.
   • You should see at least 700 psi.
     • If you have NO CO2 pressure, make sure your CO2 tank is open.
     • If your CO2 pressure is much lower than 700 psi, check both the high pressure hose, and the CO2 supply tubing for any twist or kinks.
     • If the are no issues with the high pressure hose or the supply tubing, your CO2 tank may be low.

Task 14: Check for leaks

1. Using soapy water, spray down all fittings and connections for the CO2 Regulator assembly.  Leaks will present with small bubbles coming from the fitting or connection.
   • Check the high pressure hose and all connection points at and around the tank.
     • If leaking from the tank connection, recheck that the nut is properly tightened onto the tank.
     • If leaking from any of the other fittings shown below, the high pressure hose assembly may be faulty.

2. Check the CO2 Pressure Sensor and Regulator Assembly for leaks.
   • Repeat the soapy water test on all connections and fittings.

Task 15: Fill Carbonator and Test Sparkling Dispense

1. From the Troubleshooting Tools menu, pour sparkling water using the dispense controls.
   • Check and make sure your sparkling dispense is functioning properly.
   • Dispense 1/2 liter of sparkling water.

2. If sparkling dispense is functioning, reinstall back panels, and close door.
3. If sparkling dispense has little or no carbonation, purge the carbonator.
   • Turn off buffer tank.
   • Turn off source water.
   • Dispense sparkling from TT tools until only CO2 gas is coming out from nozzle.
   • Turn on buffer tank.
   • Turn on source water.
4. Dispense SPARKLING for 5 seconds, then wait 30 seconds (demand pump will run attempting to fill carbonation tank, then shut off). 
5. Repeat the 5-second dispense and 30-second wait until the Carbonator Fill reads "Yes" (this should take 5 - 10 cycles).

6. Dispense COLD water purge any trapped air.
7. Dispense a drink to ensure all is working properly.
8. Reinstall back panels.

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)