Cornelius UF-1 Installation guide

CARBON DIOXIDE
WATER
SYRUP/CONCENTRATE
MECHANICAL
REFRIGERATION
CONTROLS & ELECTRICAL

Release Date: June 28, 2023
Publication Number: 315222001OPR
Revision Date: June 28, 2023
Revision: A

Visit the Cornelius web site at www.cornelius.com for all your Literature needs.
UF-1 AND UFB-1 VALVES
TRAINING MANUAL

Notice
The products, technical information, and instructions contained in this manual are subject to change without notice. These
instructions are not intended to cover all details or variations of the equipment, nor to provide for every possible contingency
in the installation, operation or maintenance of this equipment. This manual assumes that the person(s) working on the
equipment have been trained and are skilled in working with electrical, plumbing, pneumatic, and mechanical equipment. It
is assumed that appropriate safety precautions are taken and that all local safety and construction requirements are being
met, in addition to the information contained in this manual.
This Product is warranted only as provided in Cornelius’ Commercial Warranty applicable to this Product and is subject to all
of the restrictions and limitations contained in the Commercial Warranty.
Cornelius will not be responsible for any repair, replacement or other service required by or loss or damage resulting from
any of the following occurrences, including but not limited to, (1) other than normal and proper use and normal service
conditions with respect to the Product, (2) improper voltage, (3) inadequate wiring, (4) abuse, (5) accident, (6) alteration, (7)
misuse, (8) neglect, (9) unauthorized repair or the failure to utilize suitably qualified and trained persons to perform service
and/or repair of the Product, (10) improper cleaning, (11) failure to follow installation, operating, cleaning or maintenance
instructions, (12) use of “non-authorized” parts (i.e., parts that are not 100% compatible with the Product) which use voids
the entire warranty, (13) Product parts in contact with water or the product dispensed which are adversely impacted by
changes in liquid scale or chemical composition.
Correct Disposal of this Product
RECYCLE
This marking indicates that this product should not be disposed with other household wastes throughout the EU. To prevent
possible harm to the environment or human health from uncontrolled waste disposal, recycle it responsibly to promote the
sustainable reuse of material resources. To return your used device, please use the return and collection systems or contact
the retailer where the product was purchased. They can take this product for environmental safe recycling.
Trademarks and Copyrights
This document contains proprietary information and it may not be reproduced in any way without permission from Marmon
FoodService Technologies Inc. This document contains the original instructions for the unit described.
MARMON FOODSERVICE TECHNOLOGIES INC
355 Kehoe Blvd
Carol Stream, IL
Tel: + 1 800-238-3600
Printed in U.S.
Contact Information
To inquire about current revisions of any documentation or assistance with any Cornelius product, contact:
www.marmonfoodservice.com
www.cornelius.com
800-238-3600

NOTES:
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TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Preview Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Key Things To Know / Do . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Dimensions & Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SYSTEM DETAILS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Water Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Water Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Adjusting Flow Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Calculating Flow Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Syrup/Concentrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Setting Ratios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
UF-1 Valve Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Mounting Block Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Controls and Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
UF-1 Portion Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Portion Control Valve Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
UF-1 OptifillTM Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
OptifillTM Valve Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Requirements Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Installation & Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
UF-1 Valve Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Retrofitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Mounting Block Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Preventative Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Cleaning Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ATTACHMENTSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
REVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

UF-1 and UFB-1 Valves Training Manuai
Publication Number: 315222001OPR - 1 - © 2023, Marmon Foodservice Technologies Inc.
INTRODUCTION
1. PREVIEW QUESTIONS

Check your current knowledge by taking a few minutes to answer the following questions:
1. What are the flow capacities of a UF-1 valve? _____________________________________________
____________________________________________________________________________________
2. What are the flow capacities of a UFB-1 valve? ____________________________________________
____________________________________________________________________________________
3. Which syrup has the greatest pressure drop, diet or sugar?___________________________________
____________________________________________________________________________________
4. How do juice valves differ from carbonated beverage valves? _________________________________
____________________________________________________________________________________
5. Can you program “top-off” on a portion control valve? ______________________________________
____________________________________________________________________________________
6. What components must be replaced when retrofitting SF-1 to UF-1 valves? _____________________
____________________________________________________________________________________
2. KEY THINGS TO KNOW / DO
• For quality drinks — keep the nozzles and the water/syrup system clean; and have the correct
ratio, temperature, and carbonation!
• Set the water/syrup ratio accurately — and leave it alone!
• To set the ratio accurately, set the water flow first, then the syrup!
• Be sure to cool below 40°F the syrup and water before setting the ratio.

UF-1 and UFB-1 Valves Training Manual
© 2023, Marmon Foodservice Technologies Inc. - 2 - Publication Number: 315222001OPR
3. O VERVIEW
3.1 Product Description

The UF-1 and UFB-1 valve provides accurate flow capability and dependability. The UF-1 and UFB-1 valves are
capable of flow rates of 1 ½ to 3 ounces per second (high flow), 2 to 4 ounces per second (UFB-1), or 3 to 4 ½
ounces per second (ultra flow). The valve flow control modules are the only parts that differ in the three versions.
Note: The flow rate is also dependent on the capacity of the dispensing, cooling, and carbonation systems.
An ultra flow capacity valve will not make up for a slow system flow rate or inadequate supplies of cooled
water and syrup. The following is a list of Cornelius units and the valve flow rates they support:

UF-1 and UFB-1 Valves Training Manuai
Publication Number: 315222001OPR - 3 - © 2023, Marmon Foodservice Technologies Inc.
3. O VERVIEW
3.1 Product Description (cont.)
There are four varieties of UF-1 and UFB-1 valves:
• The cup activated valve dispenses by means of a lever engaged by the cup.
• A push button valve has a press and hold button on the front cover of the valve.
• The OptifillTM valve dispenses with an activation lever but stops after liquid fills the cup and touches the lever.
• A portion control valve has four programmable drink size buttons that provide timed deliveries, top off, and a
manual dispensing button.
Figure 1
The UF-1 and UFB-1 valves are the same as described above with minor differences for juice applications. In the
UF-1 and UFB-1 valve concentrate enters the nozzle assembly higher providing a better mix of concentrate and
water in the cup. In addition, the orifices for concentrate are larger to avoid clogging. The concentrate diffuser is
gray allowing for easy identification.
Note: The beverage (syrup) diffuser must be installed to use a diversion tube to ratio the concentrate valve
Note: Concentrate valves have only one hole in their sleeve and are only offered in fast flow capacities
of 1.5 to 3.0 oz./sec.
Figure 2

UF-1 and UFB-1 Valves Training Manual
© 2023, Marmon Foodservice Technologies Inc. - 4 - Publication Number: 315222001OPR
3. O VERVIEW
3.1 Product Description (cont.)
Figure 3
A side water lever kit can be added to a valve allowing for dispensing of water without syrup or concentrate. The side
water lever can be added to either a carbonated drink valve or a non-carbonated drink valve.
Post-mix valves control:
• the ON–OFF of syrup and water,
• the flow rates of syrup and water,
• the mixing of the two ingredients as they pour into 
the cup, and
• in some instances - dispensed portion.
Figure 4
3.2 Dimensions & Capacities
Fast Flow: 1 ½ to 3 oz./sec.
UFB-1: 2 to 4 oz./sec.
Ultra Flow: 3 to 4 ½ oz./sec.
Operational temperature range: 10°C (50°F) to 43°C (110° F)
Voltage requirements: 22 to 27 VAC (50/60 Hz)
Transformer (electronic valves): 80 VA min.
Operating Pressure (flowing): syrup = 20 psi min; water = 35 psi min.
Concentrates and juices that contain particulates must be dispensed from a juice valve.
A slanted drip tray is necessary when using an OptifillTM valve.

UF-1 and UFB-1 Valves Training Manuai
Publication Number: 315222001OPR - 5 - © 2023, Marmon Foodservice Technologies Inc.
SYSTEM DETAILS
1. WATER

1.1 Water Quality
Water quality issues have an affect on dispensing valves. Chloramine, a combination of chlorine and ammonia is
responsible for some degradation of rubber components. Chloramine is used in many U. S. water supplies. Its
affects can be minimized by installing and maintaining a water filtration system.
Ultra pure water affects the sensitivity of the Optifill™ valve. Because ultra pure water has less mineral content, it
reduces the conductivity of the water keeping the circuit open and overfilling the beverage container.
1.2 Water Flow
The size of the orifice in the piston varies depending on whether the piston is used forsyrup or water, and whether
it is high flow or ultra flow valve.
Note: The notched water piston on the Ultra Flow and UFB-1 valve. results in at least one orifice in the sleeve
always open. This eliminates pulsating and smooths water flow at higher flow rates.
Figure 5
In operation the liquid flows through the knife–edged orifice in the bottom of the piston and then out the orifices
in the sleeve. The outlet orifice size in the sleeve is regulated by the position of the piston. In the illustration, the
piston is restricting approximately 1/2 of the outlet orifices.
Figure 6

UF-1 and UFB-1 Valves Training Manual
© 2023, Marmon Foodservice Technologies Inc. - 6 - Publication Number: 315222001OPR
1.2 Water Flow (cont.)
Figure 7
The position of the piston inside the sleeve is determined by the upward pressure of the liquid against the
base of the piston and the downward pressure of the spring inside the piston (not shown here). The pressure
of the spring is regulated by the adjusting screw.
If the pressure of the liquid increases, the flow rate through the knife–edged orifice will increase. The piston
is moved upward closing off more of the outlet orifices. The sameflow rate is thereby maintained.
1.3 Adjusting Flow Rates
Flow rates of the water and syrup are adjusted based on the desired ratio. For example: if the desired ratio is
5:1, then the flow rate of the water is 5 times that of the syrup. If the desired finished drink total flow rate is
3.0 ounces per second, then the water flow rate is 2.5 oz./sec and the syrup flow rate is 0.5 oz./sec. (The
water at 2.5 oz./sec is five times the 0.5 oz./sec syrup flow rate.)
Note: Always adjust water within its range.

UF-1 and UFB-1 Valves Training Manuai
Publication Number: 315222001OPR - 7 - © 2023, Marmon Foodservice Technologies Inc.
1.4 Calculating Flow Rates
Figure 8
The most frequent ratio is 5:1. The charts above list the breakdown for many ratios and flow rates. It is useful
to be able to calculate flow rates when a chart is not available.
An example of calculating the water and syrup flow rates given the finished drink flow rate and the water to
syrup ratio:
Given:
1. Finished Drink Flow Rate = 3.0 oz./sec.
2. Water to Syrup Ratio = 5 to 1
To calculate Water Flow Rate:
1. Calculate the Total Portions = Water Portion + Syrup Portion (example 5 + 1 = 6)
2. Calculate Syrup Flow Rate = Finished Drink Flow Rate ÷ Total Portions (examp. 3.0 oz./sec ÷ 6 = 0.5 oz./sec)
3. Calculate Water Flow Rate = Finished Drink Flow Rate – Syrup Flow Rate 
(example 3.0 oz./sec - 0.5 oz./sec = 2.5 oz./sec)
Prove the calculation is correct by adding water flow rate of 2.5 oz./sec + syrup flow rate of 
5 oz./sec = finished drink flow rate of 3.0 oz./sec.
Water flowing at 2.5 oz./sec and syrup flowing at 0.5 oz./sec achieves a ratio of 5:1 and 3.0 oz./sec. flow
rate.

UF-1 and UFB-1 Valves Training Manual
© 2023, Marmon Foodservice Technologies Inc. - 8 - Publication Number: 315222001OPR
2. Syrup/Concentrate
Syrup should always be pre-cooled before setting the ratio. Syrup takes a path through the valve parallel to
the water path. It is introduced in the block, travels through a syrup flow control, banjo, valve head and out
the nozzle. Note, concentrate is not cooled.
High sugar syrups are more viscous (thicker) than diet syrups and consequently have more pressure drop
within a system. This pressure drop results in less flow at the valve and therefore a slower fill time. Increasing
the pump pressure will help overcome the pressure drop caused by high sugar syrups.
3. Setting Ratios
If the ratio varies and must be adjusted often, it is probably the result of a restricted syrup system. It is then
time to clean and sanitize the syrup tubing and cooling coils and check for other problems such as syrup
pumps, etc.
Note: Try raising the pressure on the pump before cleaning.
Set the water flow rate first, then adjust the syrup to the desired ratio. This gives the most accurate valve
flow setting possible. Measure the ratio and adjust the syrup flow, if necessary. This will result in uniform
flow, better carbonation retention, and improved drink quality.
When using a ratio cup always take these precautions to ensure accuracy:
• After installing the separator tube, open the valve to fill the syrup tube before starting the ratio test.
• Clean the cup thoroughly between tests so there is no carry–over from one test to the next.
• Fill the cup to approximately 3/4 full and use approximately the same quantity for each test to ensure
accurate settings.
• Take another sample to verify the settings.
Figure 9

UF-1 and UFB-1 Valves Training Manuai
Publication Number: 315222001OPR - 9 - © 2023, Marmon Foodservice Technologies Inc.
4. Mechanical
4.1 UF-1 and UFB-1 Valve Disassembly
1. Sequence for disassembly (refer to UF-1 Post-mix Dispensing
Valve Illustrated Parts List) is as follows:

Figure 10
________________________________________________________________________________________
2. Remove front cover by lifting.


Figure 11
________________________________________________________________________________________
3. Remove valve cover.



Figure 12
________________________________________________________________________________________
4. Unplug wiring harness.
Figure 13

UF-1 and UFB-1 Valves Training Manual
© 2023, Marmon Foodservice Technologies Inc. - 10 - Publication Number: 315222001OPR
4.1 UF-1 and UFB-1 Valve Disassembly (cont.)
5. Remove valve from mounting block 
by pushing locking tab to left and 
push down on top plate of block.
Figure 14
________________________________________________________________________________________
6. Remove water screw and lever (if it
is installed on the valve).

Figure 15
________________________________________________________________________________________
7. Remove nozzle – turn left ¼ turn.
Figure 16
________________________________________________________________________________________
8. Remove diffuser assembly.
Note: The diffuser must be cleaned daily. Do not use bleach,
do not use detergent, do not put in dishwasher. Use lukewarm
water or soak in carbonated water.
Figure 17
________________________________________________________________________________________
9. Remove bottom plate by disengaging side tabs.
Figure 18
________________________________________________________________________________________
10. Remove U-shaped retainer wire from back of valve.

Figure 19

UF-1 and UFB-1 Valves Training Manuai
Publication Number: 315222001OPR - 11 - © 2023, Marmon Foodservice Technologies
4.1 UF-1 and UFB-1 Valve Disassembly (cont.)

11. Grasp flow control module assembly and pull up.
Note: O-rings on bottom of inlets and outlets.
Figure 20
________________________________________________________________________________________

12. Note that the flow rate (1 ½ - 3, 3 – 4 ½ or 1 ½ - 3 juice) and 
date code are printed on the retainer plate.

Figure 21
________________________________________________________________________________________
13. To disassemble the flow control:
Remove screws and pull retainer forward. Remove top flow
control subassemblies exposing flow controls. Note the difference
between high flow and ultra flow valves.
Note: Top Flow control is an assembly and cannot be
dissasembled.
Figure 22

Figure 23
________________________________________________________________________________________
14. Pop off solenoid cover. Remove solenoid
assembly from valve body by prying with
screwdriver.
Note: Check plunger for corrosion and dirt –
replace as necessary.
15. Carefully remove banjo lever springs. 
Figure 24

UF-1 and UFB-1 Valves Training Manual
© 2023, Marmon Foodservice Technologies Inc. - 12 - Publication Number: 315222001OPR
4.1 UF-1 and UFB-1 Valve Disassembly (cont.)
16. Then remove 5 screws that secure the valve head to the
valve body.


Figure 25
________________________________________________________________________________________
17. To remove the dispensing lever return spring pry the end of the spring
and pull up. This spring stops the lever from vibrating.
Figure 26
________________________________________________________________________________________
4.2 Mounting Block Disassembly
To disassemble mounting block:
1. Turn off water and syrup supplies.
________________________________________________________________________________________
2. Remove 2 screws from top plate and pull spools out from the bottom
of the mounting plate exposing spools and O-rings.
Note: When replacing mounting block use replacement O-rings for the
inlet fittings.
Figure 27
________________________________________________________________________________________
3. When installing a new block, make sure it is locked in
the open position.
Figure 28

UF-1 and UFB-1 Valves Training Manuai
Publication Number: 315222001OPR - 13 - © 2023, Marmon Foodservice Technologies
5. Controls and Electrical
All UF-1 and UFB-1 valves have a 24 volt solenoid that should be powered by an 80 kVA rated transformer.
Voltage at the coil with the solenoid energized should be 22 and 27 VAC.
5.1 UF-1 and UFB-1 Portion Control Valve
The UF-1 and UFB-1 Portion Control Valves are push and release that dispense for a
programmed duration. There are four settings: small, medium, large, and extra-large.
There is also a Cancel/Pour rectangular button with red and green arrows. If this
button is pressed during dispensing, the flow stops. If the valve is not dispensing and
the button is pressed, the valve dispenses as long as the button is held.
The portion controls are factory programmed to the following default settings:
Figure 29
Portion Control Valve Programming
To set the amount of beverage dispensed, follow this procedure:
1. Press the hidden program switch until the PGM light turns on. (This light shows only when the
programming mode is turned on.)
2. Put desired amount of ice in cup. Press and hold a portion button until the desired level in the appropriate
sized cup is reached. Release the button.
3. Continue with other portion buttons that need programming. Portion buttons may be reprogrammed as
many times as necessary. Only the last time values entered for each button will be saved when exiting the
programming mode.
4. Press the program switch until the PGM light turns off.
Figure 30
NOTE: The portion control valve does not have a top-off function.
NOTE: When in programming mode, press and release any of the portion size buttons to return to the factory
portion settings.
NOTE: Portion controls will not operate below 22 volts. This is known as the “brown-out feature.”

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5.2 UF-1 and UFB-1 OptifillTM
The OptifillTM Valve is activated by pressing a cup against the dispensing lever. The valve
dispenses only until foam from the cup touches the lever.* If a top-off delay is set, the
valve will dispense again after a preset delay. This “topping-off” fills the cup after the
foam settles. The top-off delay is can be adjusted from 0 to 15 seconds, the factory
default is 2 seconds.
*Note: A metal rivet in the valve body supplies electricity through the beverage being
dispensed. When the foaming beverage comes in contact with the metal dispensing
lever it completes the electrical circuit and the flow module closes the dispensing valve
— even though the lever is still activated.
Note: The cup must stay in place against the lever for the top-off to operate.
Note: A slanted cup rest must be used with an OptifillTM valve.
Optifill Valve Programming
The OptifillTM valve module provides a timed dispensing function to set water flow rates. To access this
function:
1. Press the program switch until the LED turns on.
2. Hold a graduated cup under the valve nozzle without touching the lever. Press the large rectangular
switch. The valve dispenses for 2 seconds. The dispensed liquid divided by 2 equals the oz./sec dispensed
rate.
3. Press the program switch to exit the program.
4. To program the top off function follow this procedure:
5. Remove the front valve cover.
6. Press the program switch until the LED turns on (can be seen from the top of the module.)
7. Place cup against the lever for initial dispensing. When the foam touches the lever the valve stops and the
LED flashes.
8. When the foam in the cup has lowered, press and release the large rectangular button. The valve dispenses
a top-off and shuts off when the foam again touches the lever. The LED is now on steady.
9. Press the program switch until the LED turns off.
10. If you wish to disable the top-off, follow steps 1 through 3. Remove the cup from the lever. This will enter
a zero value for the delay time and disable the top-off fill. Press the program switch for 3 seconds.
Figure 31
Note: The OptifillTM valve does not have an adjustment for sensitivity.

UF-1 and UFB-1 Valves Training Manuai
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INSTALLATION
CAUTION: Only trained and certified technicians should service this unit. ALL WIRING AND PLUMBING
MUST CONFORM TONATIONAL AND LOCAL CODES.

1. Installation Requirements
1.1 Requirements Summary
The beverage dispenser that the UF-1 or UFB-1 valve(s) will be installed on should be capable of supplying an
adequate flow of water (for the beverage and for cooling) and syrup.
Environment: indoor installation only
Temperature: 50 to 110° F ambient temperature
Syrup BIB: 60 to 80 psi
Carbonated water: 65 to 110 psi
Plain water: 50 to 110 psi
Electrical: 24 volts AC (22-27 volts), 80 VA, 50/60 Hz
1.2 Electrical Requirements
Before connecting electrical power to the beverage dispenser refer to nameplate to see if it requires 50 or 60
Hz power.
DANGER: To avoid possible serious injury or death the ELCB (earth leakage circuit breaker) must be
installed in the electrical circuit of all 50 Hz units.
WARNING: To avoid possible electrical shock the unit must be electrically grounded using the green
grounding screw provided inside the electrical contractor box.
CAUTION: The wiring must be properly grounded and connected through a 15-amp disconnect switch
(slow?blow fuse or equivalent HACR circuit breaker). ALL WIRING MUST CONFORM TO NATIONAL AND
LOCAL CODES. MAKE SURE UNIT IS PROPERLY GROUNDED.
2. Installation and Startup
2.1 UF-1 and UFB-1 Valve Installation Procedure
1. Shut off syrup, unplug carbonator, shut off CO2 and water supply to the unit.
2. Release pressure in lines by activating valves and lifting relief valve of carbonator.
3. Detach current valves:
– Remove front cover by lifting.
– Remove valve cover.
– Unplug wiring harness.
– Remove valve.

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© 2023, Marmon Foodservice Technologies Inc. - 16 - Publication Number: 315222001OPR
3. Installation Checklist
1. Voltage and proper grounding.
2. Valve properly secured (latched) to block.
3. CO2 pressure to carbonator.
4. Water flow rate.
5. Syrup delivery pressure.
6. Finished product temperature less than 40°F.
7. Water to syrup ratio.
8. Portion size / top-off.
9. Water, syrup, CO2 leaks.
10. Cover secured to valve.
11. Valves flavor correctly marked.
4. Retrofitting
UF-1 and UFB-1 valves will retrofit any valve with an identical mounting block screw pattern.
Note: Replacement of mounting block inlet fitting O-rings (part # 4073) is required when retrofitting valves.
4.1 Mounting Block Removal
To remove valve mounting block from the front panel, take out and save 4 screws.
IMPORTANT: Before installing block replace O-rings on each outlet fitting. Lubricate with Dow 111 or
equivalent silicone lubricant. Do not use petroleum jelly.