Remcor Sentry 3 Service Manual
IMI CORNELIUS INC g One Cornelius Place g Anoka, MN 55303-6234
Telephone (800) 238-3600 Facsimile (612) 422-3246
Service Manual
SENTRY III-A POST-MIX COOLING UNIT
(R-134A Refrigerant)
IMPORTANT:
TO THE INSTALLER.
It is the responsibility of
the Installer to ensure that
the water supply to the
dispensing equipment is
provided with protection
against backflow by an air
gap as defined in
ANSI/ASME A112.1.2-1979;
or an approved vacuum
breaker or other such
method as proved effective
by test.
Water pipe connections
and fixtures directly
connected to a potable
water supply shall be
sized, installed, and
maintained according to
Federal, State, and Local
Codes.
Part No. 312021004
December 16, 1994
Revised: December 1, 1995
Control Code A
THIS DOCUMENT CONTAINS IMPORTANT INFORMATION
This Manual must be read and understood before installing or operating this equipment
IMI CORNELIUS INC; 1994--95Ó
PRINTED IN U.S.A
TABLE OF CONTENTS
SAFETY INFORMATION 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RECOGNIZE SAFETY INFORMATION 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UNDERSTAND SIGNAL WORDS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FOLLOW SAFETY INSTRUCTIONS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CO2 (CARBON DIOXIDE) WARNING 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SHIPPING, STORING, OR RELOCATING UNIT 1. . . . . . . . . . . . . . . . . . . . . . .
GENERAL INFORMATION 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TO THE USER OF THIS MANUAL 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CLAIMS INSTRUCTIONS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARRANTY REFERENCE INFORMATION 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DESIGN DATA 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DESCRIPTION 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THEORY OF OPERATION 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PARTS IDENTIFICATION 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SERVICE AND MAINTENANCE 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PREPARING COOLING UNIT FOR SHIPPING, STORING, OR RELOCATING 9
PERIODIC INSPECTION 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADJUSTING CO2 REGULATORS 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CARBONATOR CO2 REGULATOR 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SUGAR SYRUP TANK CO2 REGULATOR 9. . . . . . . . . . . . . . . . . . . . . . . . . . . .
LOW-CALORIE (DIET) SYRUP TANK CO2 REGULATOR 9. . . . . . . . . . . . . .
CLEANING CONDENSER COIL 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHECKING ICE WATER BATH 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHANGING ICE WATER BATH 11.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PERIODIC CLEANING 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CLEANING AND SANITIZING 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DAILY CLEANING OF UNIT 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SANITIZING POST-MIX SYRUP SYSTEMS 12. . . . . . . . . . . . . . . . . . . . . . . . . .
ADJUSTING CARBONATOR TANK LIQUID LEVELS 14. . . . . . . . . . . . . . . . . . . . . . .
UNDER 40-OUNCES OF CARBONATED WATER DISPENSED 14. . . . . . . . .
OVER 60-OUNCES OF CARBONATED WATER DISPENSED 15. . . . . . . . . .
CARBONATOR WATER PUMP YEARLY MAINTENANCE 15. . . . . . . . . . . . . . . . . . .
SERVICING CARBONATOR WATER PUMP WATER STRAINER SCREEN 15
SERVICING CARBONATOR WATER INLET DOUBLE LIQUID CHECK VALVE 16
CLEANING CO2 GAS CHECK VALVES 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LUBRICATION 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CARBONATOR WATER PUMP MOTOR LUBRICATION 18. . . . . . . . . . . . . . .
CARBONATED WATER CIRCULATING PUMP MOTOR LUBRICATION 18. .
REPLENISHING SYRUP SUPPLY 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SYRUP FLAVOR CHANGE 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page
WATER-TO-SYRUP “RATIO” OF DISPENSED DRINK TOO LOW OR TOO
HIGH 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADJUSTMENT OF DISPENSING VALVE SYRUP FLOW REGULATOR DOES NOT
i
312021004
INCREASE TO DESIRED WATER-TO-SYRUP “RATIO” 21. . . . . . . . . . . . . . . . . . . .
312021004
ii
TABLE OF CONTENTS (cont’d)
ADJUSTMENT OF DISPENSING VALVE SYRUP FLOW REGULATOR DOES NOT
DECREASE TO DESIRED WATER-TO-SYRUP “RATIO” 21. . . . . . . . . . . . . . . . . . . .
DISPENSED PRODUCT CARBONATION TOO LOW 22. . . . . . . . . . . . . . . . . . . . . . .
DISPENSED PRODUCT COMES OUT OF DISPENSING VALVE CLEAR BUT
FOAMS IN CUP OR GLASS 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DISPENSED PRODUCT PRODUCES FOAM AS IT LEAVES DISPENSING
VALVE 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ONLY CARBONATED WATER DISPENSED 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ONLY SYRUP DISPENSED 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARM PRODUCT BEING DISPENSED 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WATER PUMP MOTOR WILL NOT OPERATE 23. . . . . . . . . . . . . . . . . . . . . . . . . . . .
WATER PUMP MOTOR WILL NOT SHUT OFF 23. . . . . . . . . . . . . . . . . . . . . . . . . . . .
ERRATIC CYCLING OF CARBONATOR 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WATER PUMP MOTOR OPERATES BUT WATER PUMP DOES NOT PUMP
WATER 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WATER PUMP CAPACITY TOO LOW 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMPRESSOR DOES NOT OPERATE 24. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
COMPRESSOR WILL NOT STOP AFTER SUFFICIENT ICE BANK IS
PRODUCED 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMPRESSOR OPERATES CONTINUOUSLY BUT DOES NOT FORM
SUFFICIENT ICE BANK 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONDENSER FAN MOTOR NOT OPERATING 25. . . . . . . . . . . . . . . . . . . . . . . . . . .
AGITATOR MOTOR NOT OPERATING 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARRANTY 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page
LIST OF FIGURES
FIGURE 1. SENTRY III-A COOLING UNIT 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 2. SYSTEM FLOW DIAGRAM 6.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
FIGURE 3. PARTS IDENTIFICATION 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 4. CARBONATOR LIQUID LEVEL CONTROL SWITCHES 15. . . . . . . . . .
FIGURE 5. WATER STRAINER SCREEN AND DOUBLE LIQUID CHECK
VALVE 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 6. LIQUID CHECK VALVE ASSEMBLY 17. . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 7. CO2 GAS CHECK VALVE 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 8. WIRING DIAGRAM (DROP-IN REFRIGERATION ASS’Y) 19. . . . . . . .
FIGURE 9. WIRING DIAGRAM (LOWER COOLING UNIT CABINET) 19. . . . . . . .
LIST OF TABLES
TABLE 1. DESIGN DATA 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iii
312021004
SAFETY INFORMATION
Recognize Safety Information
This is the safety-alert symbol. When you see this
symbol on our machine or in this manual, be alert to
the possibility of personal injury.
Follow recommended precautions and safe operating
practices.
Understand Signal Words
A signal word - DANGER, WARNING, OR CAUTION
is used with the safety-alert symbol. DANGER identifies the most serious hazards.
DANGER
Safety signs with signal word DANGER or WARNING
are typically near specific hazards.
General precautions are listed on CAUTION safety
signs. CAUTION also calls attention to safety messages in this manual.
WARNING
CAUTION
Follow Safety Instructions
Carefully read all safety messages in this manual and on your machine safety signs. Keep safety signs in
good condition. Replace missing or damaged safety signs. Learn how to operate the machine and how to
use the controls properly . Do not let anyone operate the machine without instructions. Keep your machine in
proper working condition. Unauthorized modifications to the machine may impair function, safety, and affect
the machine life and may void the factory warranty.
CO2(Carbon Dioxide) Warning
CO2Displaces Oxygen. Strict Attention must be observed in the prevention of CO2(carbon dioxide)
gas leaks in the entire CO2and soft drink system. If a CO2gas leak is suspected, particularly in a
small area, immediately ventilate the contaminated area before attempting to repair the leak. Personnel exposed to high concentration of CO2gas will experience tremors which are followed rapidly by
loss of consciousness and suffocation.
Shipping, Storing, Or Relocating Unit
CAUTION: All water must be purged from the Unit if exposed to freezing temperature. A freezing ambient temperature will cause residual water remaining inside the Unit to freeze resulting in damage to
internal components of the Unit.
1 312021004
THIS PAGE LEFT BLANK INTENTIONALLY
312021004
2
GENERAL INFORMATION
TO THE USER OF THIS MANUAL
This manual is a guide for servicing and maintaining this equipment. Refer to table of contents for page location
of detailed information pertaining to questions that may arise during service and maintenance or troubleshooting
of this equipment.
CAUTION: Before shipping, storing, or relocating this Unit, the syrup systems must be
sanitized and all sanitizing solution must be purged from the syrup systems. All water must
also be purged from the plain and carbonated water systems. A freezing ambient
environment will cause residual water in the Unit to freeze resulting in damage to internal
components.
WARNING: CO2displaces oxygen. Strict attention must be observed in the prevention of
CO2(carbon dioxide) gas leaks in the entire CO2and soft drink system. If a CO2gas leak is
suspected, particularly in a small area, immediately ventilate the contaminated area before
attempting to repair the leak. Personnel exposed to high concentration of CO2gas will experience
tremors which are followed rapidly by loss of consciousness and suffocation.
CLAIMS INSTRUCTIONS
Claims: In the event of shortage, notify the carrier as well as IMI Cornelius Inc. immediately . In the event of
damage, notify the carrier. IMI Cornelius Inc. 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
(to be filled out by customer)
Unit Part Number
Serial Number
Install Date:
LocalAuthorized
Service Center
DESIGN DATA
Table 1. Design Data
Unit Part Numbers:
Domestic Unit 4164920000
Export Unit 4964920000
3120210043
Table 2. Design Data (cont’d)
COOLING UNIT DATA
Cooling Unit Overall Dimensions: (with hood in place)
Height 36--1/4 inches
Width 19 inches
Depth 27 inches
NOTE: Cooling unit Stand P/N 309802069 (optional) with cooling unit in place on stand dimensions:
Height (approx) 74--1/4 inches
Width 36 inches
Depth 19--1/2 inches
Weights (approximate)
Shipping Weight 260 pounds
Weight (W/O Cartoning) 240 pounds
Capacities:
Cooling Unit Water Bath (no ice bank) 16.8 gallons
Ambient Operating Temperature 40° F to 100° F
Electrical Requirements: See Unit Nameplate
DROP--IN REFRIGERATION ASSEMBLY DATA
Weights:
No Ice Bank 103 pounds
With Ice Bank 142 pounds
Refrigerant Requirement (R-134A Refrigerant) See Unit Nameplate
DESCRIPTION
The Sentry III-A Post--Mix Cooling Unit (see Figure 1) with R-134A Refrigerant is designed to provide cooled
syrup, carbonated water, and plain water to the dispensing station(s) connected to the Cooling Unit through an
insulated python. The lower cabinet of the Cooling Unit consist of carbonated water, plain water, and syrup coils,
a water tank where the coils are located, a carbonator, and a carbonated water circulating pump. The Cooling
Unit utilizes a drop-in refrigeration assembly which contains the refrigeration compressor and a condenser coil
and fan assembly as shown in Figure 2).
312021004
4
FIGURE 1. SENTRY III-A COOLING UNIT
THEORY OF OPERATION
A CO2cylinder delivers carbon dioxide gas (CO2) through adjustable CO2regulators to the soft drink tanks and
also to the built--in carbonator located inside the cooling unit. Plain water is pumped into the carbonated water
tank by the water pump and is carbonated by regulated CO2pressure also entering the tank. When dispensing
valve is opened, CO2gas pressure exerted upon the syrup in the soft drink tank, pushes syrup from the tank,
through the cooling unit, through the python, and on to the dispensing valve. Carbonated water is pushed by
CO2gas pressure from the carbonated water tank, through the cooling unit, through the python to the dispensing valve. Syrup and carbonated water meet at the dispensing valve resulting in a carbonated drink being dispensed. Plain water is also available at the dispensing station (s) by passing through the cooling unit, through
the python, and on to the dispensing station. Carbonated water is replenished when carbonated water level inside the carbonator tank drops to a specified level which in turn automatically starts the carbonator water pump
motor. When carbonated water level inside the tank has been replenished, the carbonator water pump motor will
stop. Carbonated water is continuously being circulated from the cooling unit, out through the insulated python
to the dispensing station(s), and back to the cooling unit which maintains liquids in the python at a cold temperature.
3120210045
SYRUP INLET
CONNECTIONS
VALVE
SHUTOFF
INLET
2
PLAIN WATER
CO
INLET CONNECTION
CONNECTION
WATER PUMP
CARBONATED
WATER TANK
CARBONATED
CHECK VALVE
COOLING UNIT
DOUBLE LIQUID
LINE LEGEND
PLAIN WATER
CARB WATER
CO2SYRUP
FIGURE 2. SYSTEM FLOW DIAGRAM
CULATING PUMP
CARBONATED WATER CIR-
BARBED
CONNECTORS (9)
9-LINE PYTHON
TO DISPENSING TOWER
PYTHON LINES
1THROUGH 5 and 9 SYRUP
6 PLAIN WATER
7 CARB WATER OUT
UNNUMBERED LINE IS
CARB WATER RETURN
6
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