Cornelius QUEST NT 4000 Service Manual
QUEST NT
®
4000
Service Manual
Release Date: February 19, 2004
Publication Number: 720901117SER
Revision Date: April 25, 2014
Revision: F
Visit the 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 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 Warrant 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.
Contact Information:
To inquire about current revisions of this and other documentation or for assistance with any Cornelius product contact:
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.
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
Unit Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Concentrate Handling & Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Loading Concentrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Changing Concentrate Containers: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Changing Concentrate Containers for Models without Flush/Dispense Option: . . . . 4
Brixing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Checking/Adjusting the Brix Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Planned Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Daily . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Flush System (Models with Flush/Dispense Option): . . . . . . . . . . . . . . . . . . . . . 7
Flush System (Models without Flush/Dispense Option): . . . . . . . . . . . . . . . . . . . 7
Clean Splash Zones & Dispense Nozzles: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Weekly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Sanitize the Juice Dispenser: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Semi-Annual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Clean Water Inlet Strainer: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Clean Chassis Interior: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Check and Top-Off Water Ice Bath: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Annually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Replace Pump Tubing: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Removing Pump Platform(s): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Replacing Pump Tubing: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
System Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Main Electrical Box Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Quest Series Juice Dispenser - 115VAC (based on 10 machines) . . . . . . . . . . . . . 18
Quest Series Juice Dispenser - 230VAC (based on 10 machines) . . . . . . . . . . . . . 18
Quest Service Manual
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DANGER:
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WARNING:
CAUTION:
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WARNING:
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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
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.
DIFFERENT TYPES OF ALERTS
Indicates an immediate hazardous situation which if not avoided WILL result in serious injury, death or equipment
damage.
Indicates a potentially hazardous situation which, if not avoided, COULD result in serious injury, death, or equipment
damage.
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
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.
© 2004-2014, Cornelius Inc. - 1 - Publication Number: 720901117SER
Quest Service Manual
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WARNING:
CAUTION:
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CAUTION:
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WARNING:
SAFETY PRECAUTIONS
This unit has been specifically designed to provide protection against personal injury. To ensure continued protection
observe the following:
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.
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
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 A COUNTER
When installing the unit in or on a counter top, the counter must be able to support a weight in excess of 189 lbs. (85.7
kg.) 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.
Publication Number: 720901117SER - 2 - © 2004-2014, Cornelius Inc.
UNIT SPECIFICATIONS
Quest Service Manual
Nameplate Data: Model QST 4000, 115 VAC, 4.5 amps, 1 phase 60 hertz, 6.75 oz. (191-193g) R-134a refrigerant.
Test press: High side 400 psi (27.6 bar). Low side 100 psi (6.9 bar).
Model QST 4000, 230 VAC, 3 amps, 1 phase 60hertz, 6.75 oz. (191-193g) R-134a refrigerant. Test press: High side
400 psi (27.6 bar. Low side 100 psi (6.9 bar).
Concentrate Storage: Four 0.8 gallon (3.0 liter) disposable bottles.
Clearance Recommended: 12” (30.48 cm) on top and 4” (10.16 cm) required in back for air circulation.
Electrical Connection: 6 ft. long (1.83 m) power cord with 3-prong plug attached to dispenser. Export models have line
cord less plug.
Power Sup ply: 15 amps at 120 volts dedicated power supply.
10 amps at 230 volts dedicated power supply.
Water Connection: 3/8 in. (0.95 cm) SAE male flare fitting on dispenser.
Water Supply Requirements: 60 psi (413.7 kilopascals) (4.1 bar) maximum static pressure. 30 psi (206.8 kilopascals)
(2.1 bar) minimum dynamic pressure; i.e., flowing pressure measured at dispenser water inlet with 3.0 (88.7 ml) per
second water flow. Optimum recommended pressure 50 psi (344.7 kilopascals) (3.5 bar) dynamic pressure.
Ice Bank/Pull Down: Weight 14-16 lbs. Pull Down: 3.5 - 5 hours at 75°F (24°C)
© 2004-2014, Cornelius Inc. - 3 - Publication Number: 720901117SER
Quest Service Manual
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WARNING:
CONCENTRATE HANDLING & LOADING
It is recommended that the concentrate be thawed in a refrigerated 35°F-40°F (1.6°C-4.4°C) compartment for a
minimum of 48 hours prior to loading into the Quest Juice Dispenser.
Concentrate must be completely thawed and within the temperature range of 35°F-40°F (1.6°C-4.4°C) prior to
loading. Failing to supply concentrate inside the recommended temperature range, especially below 35°F (1.6°C), will
cause an out of brix drink (refer to the Brixing Procedure section for details).
LOADING CONCENTRATE
The Quest Juice Dispenser is designed to use either disposable juice concentrate containers or
the optional Cornelius generic refillable container sold separately.
1. Thoroughly shake concentrate, for a minimum of 30 seconds, prior to use.
2. Place concentrate containers on the dispensing platform shelf inside the refrigerated cabinet.
3. Engage the concentrate container by pressing it downward into the bottle adapter opening
on the dispensing platform.
NOTE: Be sure to lubricate the o-ring seal on the container nozzle. This will ensure a
good seal and allow the pumps to draw concentrated from the containers more easily. Failure
to create a good seal at this connection may result in weak drinks and/or seepage of concentrate.
4. Prime each pump by closing the cabinet door and press each dispense button until concentrate flows from the
dispense nozzles.
CHANGING CONCENTRATE CONTAINERS:
1. Open the cabinet door and move the valve handle from “Dispense” to “Flush”
2. Close the door. Depress and hold the dispense button until clear water flows from the dispense nozzle.
3. Open the cabinet door and return the handle to “Dispense”.
4. Depress and hold the dispense button for 1-2 seconds. This will relieve water pressure from the concentrate
pump system.
5. Load concentrate container (see
Loading Concentrate
).
CHANGING CONCENTRATE CONTAINERS FOR MODELS WITHOUT FLUSH/DISPENSE
O
PTION:
1. Fill a clean concentrate container with water and load inside cabinet.
2. Close the door. Depress and hold the dispense button until clear water flows from the dispense nozzle.
3. Remove the container of water from the cabinet.
4. Depress and hold the dispense button for 1-2 seconds. This will relieve water pressure from the concentrate
pump system.
5. Load concentrate container (see
Loading Concentrate
).
Publication Number: 720901117SER - 4 - © 2004-2014, Cornelius Inc.
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