Cornelius UC 701 Series Manual

CONTINUOUS FLOW ICEMAKER
UC 701 - SERIES
Installation and Service Manual
Release Date: 2000
Publication Number: 630460150
Revision Date: April 16, 2012
Revision: B
Visit the IMI Cornelius web site at www.cornelius.com for all your Literature needs.

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 possi-
ble contingency in the installation, operation or maintenance of this equipment. This manual assumes that the per-
son(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 Warrant applicable to this Product and is sub-
ject 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 per-
sons to perform service and/or repair of the Product, (10) improper cleaning, (11) failure to follow installation, oper-
ating, 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.
Contact Information:
To inquire about current revisions of this and other documentation or for assistance with any Cornelius product con-
tact:
www.cornelius.com
800-238-3600
Trademarks and Copyrights:
This document contains proprietary information and it may not be reproduced in any way without permission from
Cornelius.
This document contains the original instructions for the unit described.
IMI CORNELIUS INC
101 Regency Drive
Glendale Heights, IL
Tel: + 1 800-238-3600
Printed in U.S.A.

TABLE OF CONTENTS
Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Read and Follow ALL Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Recognition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Different Types of Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Qualified Service Personnel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Shipping And Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Mounting in or on a Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
General Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
To the User of this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Claims Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Warranty Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Design Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Specification Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Freight Damage Claim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Initial Start up, Checks and Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Guide to Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Icemaker Cleaning and Sanitizing Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Monthly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Quarterly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Semi-Annually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Water Level Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
How Water Level Control Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
To Replace Water Level Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
To Replace Water Level Safety Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Refrigeration System Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Expansion Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Adjustment and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Condenser Modulating Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Condenser Modulating Valve Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Bin Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Motor Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Start Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
To Replace Gearmotor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Auger and Extruding Head Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Installation and Shaft Seal Replacement (See Figure 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Upper Nut and Bearing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
To Replace Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Electrical Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Overload Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Compressor Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Capacitor Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Safety Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Guide to Good Ice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Troubleshooting Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
© 2000-2012, IMI Cornelius Inc. - 1 - Publication Number: 630460150
SAFETY INSTRUCTIONS
READ AND FOLLOW ALL SAFETY INSTRUCTIONS
Safety Overview
• Read and follow ALL SAFETY INSTRUCTIONS in this manual and any warning/caution labels on the unit (decals, labels or
laminated cards).
• Read and understand ALL applicable OSHA (Occupational Safety and Health Administration) safety regulations before
operating this unit.
Recognition
DIFFERENT TYPES OF ALERTS
!
DANGER:
Indicates an immediate hazardous situation which if not avoided WILL result in serious injury, death or equipment
damage.
!
WARNING:
Indicates a potentially hazardous situation which, if not avoided, COULD result in serious injury, death, or equipment
damage.
CAUTION:
!
Indicates a potentially hazardous situation which, if not avoided, MAY result in minor or moderate injury or equipment
damage.
SAFETY TIPS
• Carefully read and follow all safety messages in this manual and safety signs on the unit.
• Keep safety signs in good condition and replace missing or damaged items.
• Learn how to operate the unit and how to use the controls properly.
• Do not let anyone operate the unit without proper training. This appliance is not intended for use by very young children or
infirm persons without supervision. Young children should be supervised to ensure that they do not play with the appliance.
• Keep your unit in proper working condition and do not allow unauthorized modifications to the unit.
QUALIFIED SERVICE PERSONNEL
!
WARNING:
Only trained and certified electrical, plumbing and refrigeration technicians should service this unit. ALL WIRING
AND PLUMBING MUST CONFORM TO NATIONAL AND LOCAL CODES. FAILURE TO COMPLY COULD
RESULT IN SERIOUS INJURY, DEATH OR EQUIPMENT DAMAGE.
Recognize Safety Alerts
This is the safety alert symbol. When you see it in this manual or on the unit,
be alert to the potential of personal injury or damage to the unit.
!

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
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SAFETY PRECAUTIONS
This unit has been specifically designed to provide protection against personal injury. To ensure continued protection
observe the following:
!
WARNING:
Disconnect power to the unit before servicing following all lock out/tag out procedures established by the user. Verify
all of the power is off to the unit before any work is performed.
Failure to disconnect the power could result in serious injury, death or equipment damage.
CAUTION:
!
Always be sure to keep area around the unit clean and free of clutter. Failure to keep this area clean may result in
injury or equipment damage.
SHIPPING AND STORAGE
CAUTION:
!
Before shipping, storing, or relocating the unit, the unit must be sanitized and all sanitizing solution must be drained
from the system. A freezing ambient environment will cause residual sanitizing solution or water remaining inside the
unit to freeze resulting in damage to internal components.
MOUNTING IN OR ON ACOUNTER
!
WARNING:
When installing the unit in or on a counter top, the counter must be able to support a weight in excess of 205 lbs.to
insure adequate support for the unit. FAILURE TO COMPLY COULD RESULT IN SERIOUS INJURY, DEATH OR
EQUIPMENT DAMAGE.
NOTE: Many units incorporate the use of additional equipment such as icemakers. When any
addition equipment is used you must check with the equipment manufacturer to determine the
additional weight the counter will need to support to ensure a safe installation.

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
© 2000-2012, IMI Cornelius Inc. - 3 - Publication Number: 630460150
GENERAL INFORMATION
TOTHE USER OF THIS MANUAL
This manual covers the installation and assembly of the Air--Cooled or Water--Cooled Model UC 701 Icemaker with
the Model UC150 Dispenser. Refer to Table of Contents for page location of detailed information pertaining to
questions that may arise during installation or operation of this equipment.
DESCRIPTION
The UC701 is a chuncklet Icemaker designed to be installed under a counter adjacent to an Ice Dispenser or an Ice
Storage Bin. The Icemaker will deliver ice to either the left or right side. The Icemaker requires a 12--inch by 12--
inch opening at the lower front of the Unit for air intake. A minimum of 1.5 sq. ft. opening must be provided out the
left or right side and the rear of the machine for air exaust.
CLAIMS INSTRUCTIONS
Claims: In the event of shortage, notify the carrier as well as IMI Cornelius immediately. In the event of damage,
notify the carrier. IMI Cornelius is not responsible for damage occurring in transit, but will gladly render assistance
necessary to pursue your claim. Merchandise must be inspected for concealed damage within 15 days of receipt.
WARRANTY REFERENCE INFORMATION
Warranty Registration Date
(to be filled out by customer)
Unit Part Number:
Serial Number:
Install Date:
Local Authorized Service Center:
DESIGN DATA
Table 1. Design Data
Unit Model Number:
UCR700--A Series Continuous--Flow Icemaker (Air--Cooled)
UCR700--W Series Continuous--Flow Icemaker (Water--Cooled)
Unit Overall Dimensions:
Height 27 inches
Width 13.7 inches
Depth 25.5 inches
Clearances Dimensions Required:
Front Side Service Access (Removable front panel to allow removal of Unit) 25 inches
Side Opposite Storage Bin for Air Exaust 4 inches
Rear for Air Exaust 4 inches
Weights:
Shipping Weight 184 pounds

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
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SPECIFICATION CHART
Models Condensing
UnitVAC HZ PH Wire Comp.
RLA
Fan
Amps
GRMTR
Amps
Refrigerant Circuit
Fuse
Oz. Type
UCR701--A Air Cooled 208/230 60 1 2 7.7 1.6 213 R404A 20
UCR701--W Water Cooled 208/230 60 1 2 7.7 N/A 2 13 R404A 20
Water Supply--Water inlet fitting is 1/4--inch SAE flare located at the top front of the Unit. The Unit is designed to operate on
water pressure between 10 PSI and 90 PSI.
Drain Overflow Line (Located at rear of the Unit) 3/8--inch Flexible Tubing
Ambient Operating Temperature 40° F to 100° F
Electrical:
Unit Electrical Rating 208/230 VAC, 60 Hz,11.3 Amps,
Single Phase
Recommended Electrical Supply 208/230 VAC, 60 hz, 20 Amps
Dedicated 3--Wire
Grounded Circuit
Table 1. Design Data
Unit Model Number:
(cont’d)

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
© 2000-2012, IMI Cornelius Inc. - 5 - Publication Number: 630460150
Figure 1. Clearance Requirements

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
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PRE-INSTALLATION
FREIGHT DAMAGE CLAIM
The delivery of your equipment (Freight Company, Distributor, or dealer) is responsible for loss or damage of your
shipment. All claims must be filed with the deliverer of your equipment. Please follow the steps below to determine
if your shipment is satisfactory or if a claim must be filed:
1. Check the number of products delivered against the number of products listed on the delivery receipt. Should
the totals not match, have the driver note all errors on both copies and both you and the driver sign and date
said notation.
2. Inspect all cartons for visible damage. Open and inspect as required before the driver leaves and have him or
her note any damage on the receipts. All damaged claims must be inspected within 15 days of delivery. Notify
your carrier immediately if concealed damage is found after delivery.
3. Should concealed damage be found when the product is unpacked, retain the packing material and the product
and request an inspection from the deliverer.
4. All claims for loss or damage should be filed at once. Delays in filing will reduce the chance of achieving a sat-
isfactory resolution to the claim.
COUNTER
1. A flat and level counter space sufficiently strong to support the weight of the Dispenser and the Icemaker. The
Icemaker may be installed on the left or the right side of the Dispenser.
2. General Requirements:
A. The front of the Icemaker must be free of obstructions.
B. Allow a 4--inch minimum clearance between exaust side of the Icemaker and adjacent equipment.
C. A louvered front panel (12--inches X 12--inches) aligned with the air inlet of the Icemaker and adequate
ventilation (1.5 Sq. feet opening) in the counter for exaust air.
D. A removable panel in the counter face (from 2--inches below the top of the counter to the floor, a minimum
of 19--inches wide) to allow removal of the Icemaker.
ELECTRICAL
Two separate 20 amp, 120VAC, 60 Hz electrical circuits.
DRAIN
One drain beneath the counter at floor level which will accomodate both the drain from the Icemaker and the
Dispenser.

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
© 2000-2012, IMI Cornelius Inc. - 7 - Publication Number: 630460150
INSTALLATION
1. Keep unit in the upright position, remove carton and pallet from the Icemaker and inspect for damage. If any
damage is found, file a claim with carrier immediately.
2. Locate startup card either on outside of container or on plastic liner. Fill in proper information and send one to
factory, and other copy to distributor. Postage is prepaid.
3. Install the Dispenser first, following installation instructions supplied with the Dispenser.
4. Remove the two hole plugs from the side of the dispenser.
A. The plugs are pressed in and sealed with a silastic sealant. To remove pry the outside cap off and then
press the inside plug into the bin. Discard both plugs.
B. Install the icemaker alignment brackets (Supplied with icemaker) to the dispenser (See Figure 2).
5. Install the Icemaker:
A. Install the icemaker alignment brackets (Supplied with icemaker) to the icemaker (See Figure 2).
B. Roll the Icemaker into the cabinet alongside the Dispenser.
C. Level and align the icemaker to the dispenser using the four level adjustment bolts located on the lower
front of the Icemaker.
D. Install the locking bolt on the lower front of the icemaker.
E. Connect drain, power and water.
6. Install transport tube:
A. Insert the ice transport tube through the bin into the transport elbow on the Icemaker. (Note
: The icemaker is
equipped with a safety switch located at the base of the elbow, this switch will prevent the icemaker from running if the elbow is not
properly installed
).
B. Align the nylon lock screw on the elbow with the recess on the tube. Install lock screw.
7. Connect bin thermostat:
A. Locate bin thermostat cable supplied with the icemaker (Black cable) and connect to electrical box on the
UC700 and the receptacle on the side of the dispenser.
Figure 2. Side Bracket Installation

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
Publication Number: 630460150 - 8 - © 2000-2012, IMI Cornelius Inc.
INITIAL START UP, CHECKS AND ADJUSTMENT INSTRUCTIONS
NOTE: Do not start Icemaker before completing installation steps on pages 6 and 7.
Turn on water supply (if Icemaker is water cooled turn water on to condenser also) turn on main power switch
(located on top of electrical box), and make the following system checks:
NOTE: If Icemaker will not start be sure water reservoir is full. Low water safety control must be
properly adjusted to start and shut down the Icemaker. If water level drops below bottom of reser-
voir, the Icemaker must shut down. Adjustment is made by moving magnet up or down.
Water Level—If necessary adjust float by bending float arm up or down as needed, push float assembly down until
Icemaker stops running. Release float and Icemaker will restart. Keep water in reservoir at level line while the
Icemaker is in operation. (See Figure 3)
Low Water Safety Control—Adjust magnet by bending magnet arm as needed to shut unit down if water level
drops below bottom of reservoir.
Bin Control—Place ice around probe, unit should shut down in one minute. Remove ice from around probe, unit
should start in two minutes.
NOTE: For altitudes over 1000 feet above sea level, adjust range screw (behind end cover). Half
turn max. raises setting 4°F approx.
Figure 3. Icemaker Float Assembly
Water modulating valve (water cooled units only)—Opening point of condenser water modulating valve should
be set to maintain proper operating pressure in the refrigeration system high side. (see chart on page 11). Closing
point of valve should be set low enough to close valve during compressor stand by periods. To raise, turn
counterclockwise, to lower turn clockwise.

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
© 2000-2012, IMI Cornelius Inc. - 9 - Publication Number: 630460150
GUIDE TO SERVICE
!
WARNING:
Disconnect electrical power to the Icemaker to prevent personal injury before attempting any internal maintenance.
Only qualified personnel should service internal components or electrical wiring.
Failure to Comply Could Result in Serious Injury, Death or Equipment Damage.
ICEMAKER CLEANING AND SANITIZING PROCEDURES
CAUTION:
!
Do not use any of the ice made during cleaning operations. Clean and sanitize ice storage area when cleaning
icemaker.
1. Turn machine off.
2. Shut off water supply.
3. Remove ice from storage bin.
4. Mix approved cleaner (2 gallons as directed). Recommended cleaner:Calgon Corp. of Virginia Chemicals,
ice machine cleaner. Mixture:3-1/3 ounces per gallon of water.
5. Clean auger assembly and ice transition tube in a sink using cleaner mixture and reinstall in icemaker.
6. Turn machine on and add cleaner solution to water level control until 2 gallons have been used.
7. Turn on water supply and run machine for 15 minutes.
8. Turn off machine and remove all ice.
9. Sanitize using household liquid bleach (50 ppm chlorine). Mixture: 1 fluid ounce per gallon room temperature
water. 2 minute exposure time.
10. Sanitize auger assembly and ice transition tube in a sink using sanitizing solution and reinstall in icemaker.
11. Fill icemaker with sanitizer by slowly pouring solution into water feed reservoir until full. Solution will drain
through overflow tube. Do not run machine. Allow to air dry.
12. If icemaker is used in conjunction with ice dispenser or storage bin, follow manufacturer’s recommended clean-
ing instructions at this time.
MAINTENANCE
Preventive maintenance can increase the trouble free life of your icemaker. Many authorized service agencies offer
service contracts for your icemaker. Contact your local distributor for further information.
Monthly
1. Clean the condenser. Use a brush, vacuum cleaner or blow from inside with air or CO2gas.
2. Inspect water feed reservoir at lease once a month until a definite pattern for cleaning and sanitizing has been
established.

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
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Quarterly
This is the maximum period of time between cleaning and sanitizing the icemaker. In addition to recommended
monthly procedure, and if a more frequent cleaning and sanitizing pattern has not been established, unit must be
cleaned and sanitized.
Semi-Annually
Semi-Annually in addition to all previously established service procedures perform the following:
1. Check for water leaks in tube connections, water fittings and lower Icemaker water seal.
2. Check drain tubes for clogs and aged tubes. Replace if tubes are stained or brittle.
3. Check for signs of condensation. Clean where necessary and replace insulation properly.
4. Check safety circuits for proper operation.
5. Check refrigeration system (see page 11).
6. Check unit for abnormal noise. Tighten machine and cabinet screws, if necessary.
7. Check white upper bearings on auger assembly. If bearings are less than 1/16’’ thick, replace. See Figure 4)
Figure 4. Upper Nut and Bearing Assembly

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
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WATER LEVEL CONTROL
HOW WATER LEVEL CONTROL WORKS
When water is introduced through the inlet fitting the float rises. the float pushes against a lever which in turn forces
the poppet assembly against the inlet fitting valve seat which seals the water off. See Figure 3 before the water inlet
is sealed the safety switch is operated. In the event of a water failure the float would drop down and operate the
safety switch to shut off the machine.
If water level control will not shut off and seal at level as indicated, be sure inlet pressure does not exceed
recommended factory operating range.
Under ordinary circumstances adjustment should not be necessary providing it was properly adjusted when unit
was installed or relocated. If, however, the control becomes inoperative, repair or replace. See Start-Up
Adjustment, page 8.
PURPOSE
1. To automatically maintain proper water level in the evaporator when unit is running and making ice.
2. A safety switch is operated in the event of an interruption in water supply. The switch shuts off the electrical
power to the icemaker and its refrigeration system. Switch will reset as soon as cause of water failure has been
corrected and proper water level in icemaker has again been reached.
3. The transparent bowl not only provides a visible check of water level, but also is a good guide to the internal
conditions which exist within the icemaker assembly itself. (See Cleaning Procedure.)
TOREPLACE WATER LEVEL CONTROL
!
WARNING:
Disconnect power to the unit before servicing. Follow all lock out/tag out procedures established by the user. Verify all
power is off to the unit before performing any work.
Failure to comply could result in serious injury, death or damage to the equipment.
1. Shut off the water supply.
2. Remove the flexible tubing from bottom of water level control and drain water from water level control and evap-
orator.
3. Remove flexible tubing at bottom of water level bowl connected to the overflow.
4. Hold water inlet fitting with proper tool to prevent it from rotating when disconnecting the water inlet.
5. Remove wing nut holding water control to its mounting bracket. Control can be removed by lifting straight up.
TOREPLACE WATER LEVEL SAFETY SWITCH
!
WARNING:
Disconnect power to the unit before servicing. Follow all lock out/tag out procedures established by the user. Verify all
power is off to the unit before performing any work.
Failure to comply could result in serious injury, death or damage to the equipment.
1. Unplug the ice dispenser from electrical outlet.
2. Unplug molex connector connecting switch to electrical box.
3. Remove the 2 screws anchoring the water level safety switch to the bottom of the water level control mounting
bracket.

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
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REFRIGERATION SYSTEM
Refrigerant
Type R404A
±10 lbs. Discharge Pressure
Water Temperature (°F)
Air Temperature (°F)
40 65 90
50 174 177 180
60 202 205 208
70 230 233 236
80 265 269 272
90 300 304 307
100 328 334 340
NOTE: Thermostatic Expansion Valve is non-adjustable on all models.
REFRIGERATION SYSTEM ADJUSTMENTS
A complete understanding of the icemaker and hermetic refrigeration system is necessary before any adjustments
are made. The refrigeration technician must use high and low side pressure readings, water and air temperatures,
plus general conditions of cleanliness to assess the refrigeration system status when making any adjustments.
All icemaker products are tested and adjusted at the factory prior to shipment where the ambient temperature
ranges from 65° to 90°F, depending on the season of the year.
Whenever a new icemaker product is initially installed and started-up, it is imperative that the start-up operation
make the following checks and/or readjustments for local conditions.
EXPANSION VALVE
You will find a thermostatic expansion valve on icemakers, which is used to control the amount of refrigerant flowing
through the evaporator. Improperly installed or defective expansion valves may cause low production, soft ice,
squeaking from evaporator and excessive load inside evaporator.
By using general refrigeration system troubleshooting along with the pressure charts you can easily determine
whether or not the expansion valve is working properly.
ADJUSTMENT AND TROUBLESHOOTING
When troubleshooting the expansion valve you must first be sure you have adequate water flowing into evaporator,
a clean condenser, unit is properly ventilated, and system is properly charged and free from any restrictions. Also
be sure compressor is operating properly.
Second, take reservoir water temperature and air temperature from condenser inlet and determine at what
pressure unit should be running. Machines are equipped with thermostatic valves, there is NO adjustment. If
correct pressure cannot be obtained, first be sure system has time to stabilize 10-15 minutes. Second, be sure
sensing bulb is located at 12:00 position on outlet side of evaporator about 3-4 inches away from evaporator and be
sure to insulate well and clamp tightly to tubing. If system pressures are still not adequate, take a second water and
air temperature reading and go over other parts of system for possible problems. If proper charge is questionable
evacuate and recharge to nameplate and leak check. If valve still malfunctions replace valve. When replacing valve
be sure to bleed refrigerant gas from low side port so as not to lose refrigerant oil. Use general refrigerant system
practices when replacing and recharging unit. After new valve is in place, go through previous monitored
adjustments and troubleshooting to be sure valve is functioning properly.
NOTE: Units with thermostatic expansion valve—Thevalve is located on bottom refrigerant line.
Sensing bulb is located on top refrigerant line. On water cooled units adjust condenser modulating
valve before troubleshooting expansion valve.

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
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CAUTION:
!
Very high discharge pressure is present in system. Quick disconnects on your gauges will minimize danger and loss
of refrigerant. Comply with federal regulations for reclaiming refrigerant.
CONDENSER MODULATING VALVE
The reason for using a water modulating valve is to supply the correct amount of water to the condenser. and to
maintain a proper operating pressure to refrigeration system high side.
The flow of water through the valve is increased as the high side pressure rises and is decreased as high side
pressure lowers.
To calibrate the amount of water flow with the refrigeration system high side pressure, turn adjustment screw
located on end of valve opposite of bellows. See Figure 6. Turn screw counterclockwise to raise opening point or
clockwise to lower opening point. Opening point of valve should be set to maintain proper operating pressure in
refrigeration system high side. Refer to Pressure Chart on page 3. Closing point of valve should be set low enough
to close valve during compressor stand-by periods.
NOTE: Cold water will absorb heat faster than warm water. The water flow will therefore automati-
cally increase as inlet temperature increases.
Figure 5. Expansion Valve Figure 6. Adjustment Screw
CONDENSER MODULATING VALVE REMOVAL
!
WARNING:
Disconnect power to the unit before servicing. Follow all lock out/tag out procedures established by the user. Verify all
power is off to the unit before performing any work.
Failure to comply could result in serious injury, death or damage to the equipment.
1. Shut off water supply to condenser and evacuate refrigerant from system.
2. Remove inlet water line from Condenser Modulating Valve. Also remove tube from high side refrigerant line.
3. Remove Condenser Modulating Valve and bracket from unit.
4. Remove valve from bracket.
5. Replace Condenser Modulating Valve by reversing Steps 1 thru 4. Then pull system into vacuum.
6. Charge unit with proper amount of refrigeration.
7. Turn power and water on to unit.
8. With unit running, adjust modulating valve to proper setting.
9. Go through a complete system check.

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
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BIN CONTROL
The type of bin control used on all UC Models is thermostatically controlled. The switch itself is inside the electrical
box of the Dispenser and can be serviced from the front of the unit. The cap tube bulb is located in the thermostat
well directly under the ice inlet.
To test switch, disconnect power to unit and remove one wire from switch. Connect both leads of your ohmmeter to
the Bin Control Switch terminals. With control bulb at room temperature ohmmeter should read “Closed Circuit”.
Now cover the control bulb with ice, within 1 minute switch should “click” and ohmmeter should read “Open Circuit.”
The Bin control is in electrical series with a 24 volt transformer located in the ice dispenser and a 24 volt control
relay located in the Icemaker.
The Bin 24 volt control relay is in electrical series with coil on antifreeze relay along with the low water safety. If unit
is water cooled, the condenser high pressure cut out is also in series.
The Control Switch is held in place inside electrical box by 2 screws. Control bulb is positioned under ice chute and
can be replaced by removing the capillary from the thermostat well.
The most important thing to remember when replacing probe is to be careful not to cut or kink probe and be sure
sensor bulb is located in a position to shut unit down before ice reaches ice chute.
This icemaker is equipped with a safety ice level sensor. This sensor control is located on top of theevaporator.This
switch is also in electrical series with the anti-freeze relay and other safety circuitry.
GEARMOTOR
The gearmotor is equipped with a start relay and a manual reset overload.
When current is applied, the relay energizes and completes the circuit to the start winding. The motor reaches a
predetermined speed and the relay drops out, disconnecting the start winding. The run winding remains in the
circuit as long as current is applied.
The purpose of the overload is to automatically shut off the motor in the event of a mechanical bind of the
transmission, an overload condition within the evaporator or an electrical malfunction. It does this by sensing
amperage draw. If the motor stalls the start relay would energize and stay energized. The amperage would surge 5
to 6 times greater than the normal draw. In this event the overload would shut off the transmission in 4 to 8
seconds.
If the motor is subjected to an abnormal load, but does not reach a stall condition, the overload will react, but over
a greater period of time. The reaction time depends upon the amperage to which it is subjected.
The overload, through the safety circuit, also shuts off the compressor.

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
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MOTOR CHECK
The resistance readings on the winding will be between 5 to 25 ohms. A meter capable of these low readings must
be used. The start relay cover must be removed. (See Figure 7).
If no continuity on start or run winding test, replace gearmotor. If continuity on grounded motor test, replace
gearmotor.

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
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START RELAY
1. Check between “2” and “4” on relay (with relay unplugged). If there is continuity replace the relay, as the relay
contacts should be open.
2. Check between “3” and “4” on relay, if no continuity replace the relay.
Figure 7. Gearmotor Assembly
To Replace Gearmotor Assembly
!
WARNING:
Disconnect power to the unit before servicing. Follow all lock out/tag out procedures established by the user. Verify all
power is off to the unit before performing any work.
Failure to comply could result in serious injury, death or damage to the equipment.
1. Disconnect the transmission cable from the electrical box.
2. Remove the 4 hex head bolts securing the evaporator to the top of the transmission.
3. Remove the 4 bolt’s holding the transmission and bracket to frame base, while supporting the weight of the
evaporator. Remove the transmission from the unit.
4. When replacing the transmission, it may be necessary to rotate the auger back and forth to align the motor
shaft and auger.
Figure 8. Auger and Extruding Head Removal