Servend Ice & Beverage Dispensing Units Troubleshooting guide

MD/MDH SERIES
MD 150/175/200/250 & MDH 302/402 Beverage/Ice Dispensers
INSTALLATION & SERVICE GUIDE
Part Number 5010330
Manitowoc Beverage Equipment
2100 Future Drive Š Sellersburg, IN 47172-1868
Tel: 812.246.7000, 800.367.4233 Š Fax: 812.246.9922
www.manitowocbeverage.com
In accordance with our policy of continuous product development and
improvement, this information is subject to change at any time without notice.
December 03, 2007 REV5
FOREWORD
Manitowoc Beverage Equipment (MBE) developed this manual as a reference guide for the owner/
operator, service agent, and installer of this equipment. Please read this manual before installation
or operation of the machine. A qualified service technician should perform installation and startup of this equipment, consult the Troubleshooting Guide within this manual for service assistance.
If you cannot correct the service problem, call your MBE Service Agent or Distributor. Always have your model and
serial number available when you call.
Your Service Agent ___________________________________________________________________
Service Agent Telephone Number ______________________________________________________
Your Local MBE Distributor ___________________________________________________________
Distributor Telephone Number _________________________________________________________
Model Number ______________________________________________________________________
Serial Number _______________________________________________________________________
Installation Date _____________________________________________________________________
UNPACKING AND INSPECTION
Note: The dispenser was thoroughly inspected before leaving the factory. Any damage or irregularities
should be noted at the time of delivery.
WARRANTY INFORMATION
Consult your local MBE Distributor for terms and conditions of your warranty. Your warranty specifically
excludes all beverage valve brixing, general adjustments, cleaning, accessories and related servicing.
Your warranty card must be returned to Manitowoc Beverage Equipment to activate the warranty on this
equipment. If a warranty card is not returned, the warranty period can begin when the equipment leaves
the MBE factory.
No equipment may be returned to Manitowoc Beverage Equipment without a written Return Materials
Authorization (RMA). Equipment returned without an RMA will be refused at MBE’s dock and returned
to the sender at the sender’s expense.
Please contact your local MBE distributor for return procedures.
TABLE OF CONTENTS
FOREWORD ........................................................................................................ 2
UNPACKING AND INSPECTION ........................................................................ 2
WARRANTY INFORMATION ............................................................................... 2
SAFETY ............................................................................................................... 6
IMPORTANT SAFETY INSTRUCTIONS ............................................................................. 6
CARBON DIOXIDE WARNING ........................................................................................... 6
QUALIFIED SERVICE PERSONNEL .................................................................................. 6
SHIPPING, STORAGE, AND RELOCATION ....................................................................... 6
ADDITIONAL WARNINGS ................................................................................................. 6
GROUNDING IN STRUCTIONS ......................................................................................... 7
INSTALLATION .................................................................................................... 8
PRE-INSTALLATION CHECK LIST .................................................................................... 8
LEGS ................................................................................................................................ 8
UNIT INSTALLATION ........................................................................................................ 9
DRAINAGE OPTIONS ....................................................................................................... 9
CARB TANK PURGE TUBE ROUTING .............................................................................10
COLD CARB AND AMBIENT SYSTEM PRESSURES ........................................................ 11
AMBIENT BAG-IN-BOX (B-I-B) SYSTEM .......................................................................... 11
COLD CARB BAG-IN-BOX (B-I-B) SYSTEM ...................................................................... 11
TOP MOUNTED ICEMAKER REQUIREMENTS .................................................................13
ICE FLOW RESTRICTOR ................................................................................................. 13
BAFFLE FOR MANITOWOC™ CUBERS ..........................................................................14
BAFFLE FOR "Q" SERIES ICE MACHINES ...................................................................... 14
MANUAL FILL LID FOR DISPENSERS WITH A CUBER ..................................................14
PLUMBING DIAGRAM LOCATION ...................................................................................15
MD-150 6 VALVE PLUMBING DIAGRAM ..........................................................................16
MD-150 6 VALVE FLEX MANIFOLD .................................................................................. 16
MD-175 8 VALVE PLUMBING DIAGRAM ..........................................................................17
MD-175 8 VALVE FLEX MANIFOLD ................................................................................. 17
MD-200/250 8 VALVE PLUMBING DIAGRAM ................................................................... 18
MD-200/250 8 VALVE FLEX MANIFOLD ........................................................................... 18
MD-200/250 10 VALVE PLUMBING DIAGRAM .................................................................19
MD-200/250 10 VALVE FLEX MANIFOLD ......................................................................... 19
MD-302 12 VALVE PLUMBING DIAGRAM ........................................................................ 20
MD-302 12 VALVE FLEX MANIFOLD ............................................................................... 20
MD-402 16 VALVE PLUMBING DIAGRAMS ..................................................................... 21
MD-402 16 VALVE FLEX MANIFOLD ............................................................................... 21
MD-402 20 VALVE PLUMBING DIAGRAMS ..................................................................... 22
MD-402 20 VALVE FLEX MANIFOLD ............................................................................... 22
TABLE OF CONTENTS
OPERATION ...................................................................................................... 23
UNIT INSPECTION ........................................................................................................... 23
ICE STORAGE AND DISPENSING ................................................................................... 23
ROCKING CHUTE ICE DISPENSING ................................................................................ 23
COLD PLATE BEVERAGE COOLING ............................................................................... 23
BEVERAGE VALVES ........................................................................................................ 23
AUTO BAG SELECTORS ................................................................................................. 24
B-I-B ................................................................................................................................. 24
PUMPS ............................................................................................................................ 24
RACKING ......................................................................................................................... 24
PRE-MIX & POST-MIX BEVERAGE DISPENSERS .......................................................... 24
BACK ROOM PACKAGE .................................................................................................. 25
BAG-IN-BOX SYSTEM ..................................................................................................... 25
FIGAL SYSTEM ............................................................................................................... 26
CARBONATION ................................................................................................................ 27
INTERNAL CARBONATION .............................................................................................. 27
MD SERIES COUNTERTOP MEASUREMENTS ................................................................ 28
MD SERIES SPECIFICATIONS ........................................................................................ 29
MDH SERIES COUNTERTOP MEASUREMENTS .............................................................. 30
MDH SERIES SPECIFICATIONS ...................................................................................... 31
ROCKING CHUTE ICE DELIVERY SWITCH ADJUSTMENT .............................................. 32
SETTING THE AUTOMATIC AGITATION TIMER ............................................................... 33
115V/220V NON ADJUSTABLE AGITATION TIMER .......................................................... 33
SEQUENCE OF OPERATION ............................................................................................ 34
USER MAINTENANCE ...................................................................................... 35
PREVENTATIVE MAINTENANCE ...................................................................................... 35
HOW TO DISASSEMBLE FOR CLEANING OR MAINTENANCE ....................................... 35
DAILY CLEANING ............................................................................................................. 38
MONTHLY CLEANING ...................................................................................................... 39
BEVERAGE SYSTEM CLEANING ..................................................................................... 40
BAG-IN-BOX SYSTEM ..................................................................................................... 40
FIGAL BEVERAGE SYSTEM ............................................................................................ 41
Installation and Service Manual
TABLE OF CONTENTS
EXPLODED VIEWS, PARTS & DIAGRAMS ..................................................... 42
MD 150/175/200/250 EXPLODED VIEW ............................................................................ 42
MD 150 PARTS LIST ....................................................................................................... 43
MD 175 PARTS LIST ....................................................................................................... 43
MD 200/250 PARTS LIST ................................................................................................. 44
MDH 302/402 EXPLODED VIEW ....................................................................................... 45
MDH 302 PARTS LIST .....................................................................................................46
MDH 402 PARTS LIST .....................................................................................................46
MD 150 115V PRE-MIX WIRING DIAGRAM ...................................................................... 47
MD 150/175/200 115V WIRING DIAGRAM ........................................................................ 48
MD 150 220V PRE-MIX WIRING DIAGRAM ...................................................................... 49
MD 150/175/200 220V WIRING DIAGRAM ........................................................................ 50
MD 250 115V WIRING DIAGRAM ..................................................................................... 51
MD 250 220V WIRING DIAGRAM ..................................................................................... 52
MDH 302 115V WIRING DIAGRAM ...................................................................................53
MDH 302 220V WIRING HARNESS .................................................................................. 54
MDH 402 115V WIRING DIAGRAM ...................................................................................55
MDH 402 220V WIRING DIAGRAM ...................................................................................56
TROUBLESHOOTING ....................................................................................... 57
PUMP ............................................................................................................................... 57
DRINKS ............................................................................................................................ 58
LIQUID LEVEL CONTROL ................................................................................................ 60
INDEX ................................................................................................................ 63
5
SAFETY
IMPORTANT SAFETY INSTRUCTIONS
Carefully read all safety messages in this manual. Learn how to operate the MD unit properly. Do not
allow anyone to operate the unit without proper training and keep it in proper working condition.
Unauthorized modifications to the MD may impair function and/or safety and affect the life of the unit.
CARBON DIOXIDE WARNING
DANGER: Carbon Dioxide (CO2) displaces oxygen.Exposure to a high concentration of CO2 gas causes
tremors, which are followed rapidly by loss of consciousness and suffocation. If a CO2 gas leak is
suspected, particularly in a small area, immediately ventilate the area before repairing the leak. CO2 lines
and pumps should not be installed in an enclosed space. An enclosed space can be a cooler or small
room or closet.This may include convenience stores with glass door self serve coolers.If you suspect CO2
may build up in an area, venting of the B-I-B pumps and / or CO2 monitors should be utilized.
QUALIFIED SERVICE PERSONNEL
WARNING: Only trained and certified electrical and plumbing technicians should service this unit. All
wiring and plumbing must conform to national and local codes.
SHIPPING, STORAGE, AND RELOCATION
CAUTION: Before shipping, storing, or relocating this unit, syrup systems must be sanitized. After
sanitizing, all liquids (sanitizing solution and water) must be purged from the unit. A freezing environment causes residual sanitizing solution or water remaining inside the unit to freeze, resulting in
damage to internal components.
ADDITIONAL WARNINGS
Installation and start-up of this equipment should be done by a qualified service technician. Operation,
maintenance, and cleaning information in this manual are provided for the user/operator of the equipment.
Save these instructions.
Installation and Service Manual
SAFETY
GROUNDING IN STRUCTIONS
WARNING: Risk of electrical shock. Connect to a properly grounded outlet only.
This appliance must be grounded. In the event of malfunction or breakdown, grounding provides a
path of least resistance for electric current to reduce the risk of electric shock. This appliance is
equipped with a cord having an equipment-grounding conductor and a grounding plug. The plug
must be plugged into an appropriate outlet that is properly installed and grounded in accordance
with all local codes and ordinances.
DANGER – Improper connection of the equipment-grounding conductor can result in a risk of electric shock. The conductor with insulation having an outer surface that is green with or without yellow
stripes is the equipment grounding conductor. If repair or replacement of the cord or plug is necessary, do not connect the equipment-grounding conductor to a live terminal. Check with a qualified
electrician or serviceman if the grounding instructions are not completely understood, or if in doubt
as to whether the appliance is properly grounded. Do not modify the plug provided with the appliance – if it will not fit the outlet, have a proper outlet installed by a qualified electrician.
WARNING – When using electric appliances, basic precautions should always be followed, including the following:
a) Read all the instructions before using the appliance.
b) To reduce he risk of injury, close supervision is necessary when an appliance is used near
children.
c) Do not contact moving parts.
d) Only use attachments recommended or sold by the manufacturer.
e) Do not use outdoors.
f) For a cord-connected appliance, the following shall be included:
• Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord.
• Unplug from outlet when not in use and before servicing or cleaning.
• Do not operate any appliance with a damaged cord or plug, or after the appliance
malfunctions or is dropped or damaged in any manner. Return appliance to the nearest
authorized service facility for examination, repair, or electrical or mechanical adjustment.
g) For a permanently connected appliance – Turn the power switch to the off position when
the appliance is not in use and before servicing or cleaning.
h) For an appliance with a replaceable lamp – always unplug before replacing the lamp.
Replace the bulb with the same type.
i) For a grounded appliance – Connect to a properly grounded outlet only. See Grounding
Instructions.
SAVE THESE INSTRUCTIONS
7
INSTALLATION
PRE-INSTALLATION CHECK LIST
When installing any system, first make sure the major components are available. Generally the major components
necessary for an installation are:
† Do you have enough space to install the dis†
Pre-mix system:
†
†
†
†
†
†
†
†
†
† Is the countertop level?
penser or a dispenser and top mounted cuber?
Does the top mounted cuber (if utilized) have
a minimum of 6 inches (15.3) cm) clearance
on all sides?
† Can the countertop support the weight of the
dispenser, or the dispenser/cuber combination
plus the weight of the stored ice?
Post mix system:
†
†
†
†
†
†
†
CO2 regulator set
Product connectors for Figal tank
Gas connectors for Figal tank
Beverage dispenser
Beverage tubing
CO2 tank
Figal beverage tanks
CO2 regulator set
Beverage dispenser
Beverage tubing
CO2 tank
Carbonator
Stepless (Oetiker) clamps
Chain for CO2 tank
Stepless (Oetiker) clamps
Chain for CO2 tank
Figal system also:
B-I-B System also:
† B-I-B connectors
† Syrup connectors for Figal tank
† Gas connectors for Figal tank
† Figal syrup tanks
† B-I-B regulator set
† B-I-B rack
† B-I-B syrup boxes
Double Check:
† Is the countertop level?
† Do you have enough space to install the dispenser or a dispenser and top mounted cuber?
† Does the top mounted cuber (if utilized) have a
† Can the countertop support the weight of the
minimum of 6 inches (15.3) cm) clearance on
all sides?
dispenser, or the dispenser/cuber combination
plus the weight of the stored ice?
Also consider the location of the following items before installation:
† Water line
† Power outlet
† Drain
† Heating and air conditioning ducts
LEGS
CAUTION: It is recommended if an icemaker is installed on top of the dispenser, legs should NOT be installed.
Legs are optional equipment with most Servend dispensers. Standard legs are four-inch (10.2 cm) tall painted
steel legs.
8
When installing legs on a MD Series dispenser, leg
braces should be used. These are metal braces fitting
side to side under the dispenser that reinforce the leg
attachment area.
Installation and Service Manual
INSTALLATION
UNIT INSTALLATION
1. Place the dispenser in the desired location.
tween those pressures proper measures must be
taken to regulate them to correct settings.
2. Run the beverage lines and water lines (make sure to
install the water connections to the proper inlets. Connection “A” comes from the procon pump and is your
carbonated water supply and Connection “B” is your
plain water supply. (Refer to plumbing diagrams.)
6. Turn CO2 supply on to the dispenser. Each cold carb
pump deck is furnished with a fixed regulator set at
75 psi. Ambient units need to be set between 90 and
100 psi.
3. Install drain plumbing and insulate.
7. Fill bin with ice.
(See Drainage Options below)
8. Connect power supply.
4. Set flexible manifold for correct drink settings.
9. Brix beverage valves.
5. Turn water supply on to the dispenser. Water pressure should be between 40 and 55 psi. If not in-be-
10. Meet all code requirements.
DRAINAGE OPTIONS
The drains for MD Series connects to the drain pan.
Option One
Option Two
Drainage through the bottom of the unit:
Drainage through the back of the unit:
NOTE: The MDH 302 & 402 will have two drains
Radiator clamp
90 elbow fitting
Straight fitting Radiator clamp
Flexible tubing
Radiator clamp
Flexible tubing
Holes for
beverage
lines
Holes for
drain pan
drain
9
INSTALLATION
CARB TANK PURGE TUBE ROUTING
1. During installation of unit the carbonator tank purge
tube (A) must be properly routed to a drain. Once
the splash panel has been removed from unit remove twist tie (B) that holds carbonator tank purge
tube.
A
2. Route carbonator tank purge tube (A) down front of
unit and behind drain pan. Be sure not to collapse or
kink carbonator tank purge tube during routing from
unit to drain. (C) Purge tube is connected to the pressure relief valve on carbonator tank and must be
routed to a drain
B
3. The carbonator tank purge tube (A) can be routed
down through the counter top that unit has been installed on or out the rear of unit. Then install carbonator tank purge tube to a drain. Follow all local and
national plumbing codes when routing carbonator
tank purge tube to the drain.
A
C
Pressure Relif Valve
Drain Pan
To Drain
10
A
Installation and Service Manual
INSTALLATION
COLD CARB AND AMBIENT SYSTEM PRESSURES
1. Incoming tap water should be at a minimum pressure of 40 psi and a maximum of 55psi.
2. BIB pressure gauge set for 60 psi.
3. Carbonator Pressure gauge:
• Cold Carbonation set for 75 psi.
• Ambient systems should be set at 90 psi to 100
psi.
NOTE: If incoming water pressure is under 40 psi, a water booster is recommended. If incoming water pressure is
over 55 psi, a water regulating valve is required.
AMBIENT BAG-IN-BOX (B-I-B) SYSTEM
NOTE:
Dispenser
This is a simplified schematic to
show the basic operation of the
beverage system.
Typical MD Ambient
System Overview
5
w/Coldplate
Countertop
BIB
Syrup Pump
SYRUP
NON-CARBONATED WATER
SYRUP
CARBONATED WATER
1800
ox
n-B
p
g-I
Ba Syru n
rto
Ca
90100
Tap Water
60
1
CO2
SYRUP
CO2
Cylinder
CO2
Carbonator
Tap Water
3
Tank
4
CO2
SYRUP
2
Drawing #: 5010102-0
COLD CARB BAG-IN-BOX (B-I-B) SYSTEM
NOTE:
This is a simplified schematic to
show the basic operation of the
beverage system.
MD Series
Internal Carbonation
Beverage Dispensing System
Dispenser
Carbonated/Non-carbonated
Beverage Manifold
Carbonator Tank
Countertop
SYRUP
BIB
Syrup Pump
Tap Water
CO2
1800
60
Tap Water
ox
n-B
g-I p
Ba Syru n
o
rt
Ca
CO2
3
CO2
Cylinder
1
75
SYRUP
2
4
Dwg#: 5010301-0
11
INSTALLATION
COLD CARB BAG-IN-BOX (B-I-B) SYSTEM
12
Installation and Service Manual
INSTALLATION
TOP MOUNTED ICEMAKER REQUIREMENTS
1
2
3
Location - Avoid placing the dispenser and/or ice
machine near heat sources such as radiators, ovens, refrigeration equipment and direct sunlight.
Clearances - Six inch (15.2 cm) clearance on all
sides of the icemaker is needed.
Front of icemaker to be flush with front of dispenser- The front of the icemaker should be flush
with the front of the dispenser, as shown in the draw1
2
4
5
ing above. Because the icemaker is flush with the
front of the dispenser, some icemakers may overhang at the back of the dispenser.
Drains - A separate drain line is required for the ice
machine, in addition to a drain line for the ice/beverage dispenser.
MD Series dispensers require an adapter kit to
install a top-mounted icemaker. Contact your local Servend distributor for the correct adapter kit.
6" (15.2 cm)
clearance
for cuber
6" (15.2 cm)
6" (15.2 cm)
cuber
6"
(15.2 cm)
5
6"
(15.2 cm)
3
3
4
4
NOTE: For full information about icemaker installation, including plumbing lines connections and
electrical requirements, see the icemaker installation manual.
ICE FLOW RESTRICTOR
For all Servend MD/MDH Series dispensers an ice flow
restrictor is available. This ice flow restrictor decreases
the amount of ice allowed to enter the ice chute by blocking a small area at the entrance of the dispenser chute.
This in turn restricts the flow of ice that is dispensed in to
your cup.
Ice Flow Restrictor
Please refer to the instructions included in kit #5013822
for more information on how to install.
13
INSTALLATION
BAFFLE FOR MANITOWOC™ CUBERS
When installing a Manitowoc™ “S” series Ice Machine on a Servend MD-series dispenser, a baffle kit is required for
proper installation. The baffle kit is designed to prevent ice from lying against the front of the ice machine, and
melting down the front of the dispenser. There are two different baffle kits available from Servend. One kit is for the
30" wide “S” series ice machine, and the other kit is for the 22" wide “S” series ice machine.
These two Kits are available through your local Manitowoc Distributor. List prices may be subject to change without
notification. Please call your local parts distributor for current pricing before ordering.
Ice Maker Baffle Installation:
1. Remove both front panels.
2. Examine the ice machine to see if the machine has
four screws on the lower front plastic panels.
3. If there are screws, remove them from the countersunk holes on the front surface of the machine, save
the screws.
4. Install the deflector, using the four screws removed
in step three.
5. Four screws and two backing plates are in the kit.
6. If there are no screws on the ice machine (step 2),
pierce the thin plastic countersunk holes, install the
backing plates and install the deflector using the
screws from the kit.
7. Replace the front panels.
Part Number
Description
5029518 ........................ Baffle Kit 30”
5029517 ........................ Baffle Kit 22”
BAFFLE FOR "Q" SERIES ICE MACHINES
1. Position baffle on top of water well with tab on the
front and the other tab inside the water well.
2. Mount the baffle on the left side of the ice maker
using the hole and screw provided.
MANUAL FILL LID FOR DISPENSERS WITH A CUBER
If you are top mounting your MD Series dispenser with a
cuber, you will require a lid for the manual fill area at the
top, front of the dispenser.
14
If you ordered a Servend dispenser and a cuber at the
same time, the manual fill lid was included with the unit.
The manual fill lid can be ordered from your local Servend distributor.
Installation and Service Manual
INSTALLATION
PLUMBING DIAGRAM LOCATION
The plumbing diagram is printed on a white vinyl label, usually located above the inlet tubes for syrup and later. The
plumbing diagram label can be accessed by removing the splash panel of the dispenser. The plumbing diagram label
explains which inlet coldplate fittings supply which dispenser valves and water manifolds.
On internal carb units the water supply must first be connected to the carbonator pump before plumbing to connection
“A” shown on plumbing diagram. The carbonator pump deck must be within six feet of the dispenser for optimum
performance. (See BIB installation diagram for system pressure settings). 0
4
SH
PU
R IC
FO
E
ING
PLUMB AM
R
G
DIA
Plumbing Diagram
15
INSTALLATION
MD-150 6 VALVE PLUMBING DIAGRAM
MD-150 6 VALVE FLEX MANIFOLD
16
Installation and Service Manual
INSTALLATION
MD-175 8 VALVE PLUMBING DIAGRAM
MD-175 8 VALVE FLEX MANIFOLD
17
INSTALLATION
MD-200/250 8 VALVE PLUMBING DIAGRAM
MD-200/250 8 VALVE FLEX MANIFOLD
18
Installation and Service Manual
INSTALLATION
MD-200/250 10 VALVE PLUMBING DIAGRAM
MD-200/250 10 VALVE FLEX MANIFOLD
19
INSTALLATION
MD-302 12 VALVE PLUMBING DIAGRAM
LEFT
RIGHT
MD-302 12 VALVE FLEX MANIFOLD
(1 PER SIDE)
20
Installation and Service Manual
INSTALLATION
MD-402 16 VALVE PLUMBING DIAGRAMS
LEFT
RIGHT
MD-402 16 VALVE FLEX MANIFOLD
(1 PER SIDE)
21
INSTALLATION
MD-402 20 VALVE PLUMBING DIAGRAMS
LEFT
RIGHT
MD-402 20 VALVE FLEX MANIFOLD
(1 PER SIDE)
22
Installation and Service Manual
OPERATION
UNIT INSPECTION
Thoroughly inspect the unit upon delivery. Immediately report any damage that occurred during transportation to the
delivery carrier. Request a written inspection report from a claims inspector to document any necessary claim.
ICE STORAGE AND DISPENSING
Servend dispensers are designed to dispense hard, cube ice up to one-inch square. The ice shapes and sizes listed
below are recommended for dispensing. Warm “Super Cooled” Ice Before Dispensing “Super Cooled” ice is not
recommended for dispensing. “Super cooled” ice is ice that has been stored in freezers below 32oF. Should it be
necessary to temporarily use “super cooled” ice, allow the ice to warm at room temperature for 25 to 30 minutes before
placing the ice in the dispenser.
Dispensing compressed flake “nugget” ice in Servend dispensers takes special handling. Most dispensers require
special bin components plus a universal ice management kit. Contact MBE regarding details for your particular
installation.
ROCKING CHUTE ICE DISPENSING
As the customer presses the rocking chute, the arm at
the top left rear of the chute pushes upward on the door
lock. The door opens until it contacts the stops in the
mounting brackets. The plastic arm on the ice chute also
activates the lever of the ice dispensing switch. When activated, the micro switch starts the gear motor. The gear
motor turns the paddle wheel and agitator arm. The paddle
wheel carries ice. Periodic agitation is optional on the MD150 and MD-175 and is standard on the MD-200, MD-250,
MD-302 and MD-402. During periodic agitation, the paddle
wheel and agitator turn for approximately three seconds
every three and one half-hours. The door lock prevents ice
from being dispensed during the agitation cycle. (See Also
Sequence of Operation)
COLD PLATE BEVERAGE COOLING
A cold plate is a block of aluminum with serpentine stainless steel tubes molded inside the aluminum block. The
cold plate is approximately the same length and width
as the bottom of the dispenser bin. Ice sits on top of the
cold plate and cools the cold plate. The stainless steel
tubes inside the cold plate carry carbonated water (soda
water), noncarbonated water (plain water) and syrup to
the beverage valves. While flowing through the stainless
steel tubes in the cold plate, water and syrup are chilled
to serving temperature.
BEVERAGE VALVES
Post-mix beverage valves are designed to precisely meter the flow of both water and syrup to obtain the proper mixing
ratio. The syrup and soda water components of the post-mix beverage are mixed as they leave the beverage valve.
23
OPERATION
AUTO BAG SELECTORS
These are used on higher volume B-I-B systems where two or more bags of the same product are connected to one
pump and one system. An auto bag selector is essentially a valve that automatically changes from one bag (or series
of bags) to another bag (or series of bags) of syrup as the bags empty, allowing a constant flow of product.
B-I-B
The Bag-In-Box system refers to a plastic disposable bag. The B-I-B normally contains 5 gallons of syrup, however
some locations offer 2 1/2 or 3 gallon B-I-B units. This plastic bag is then held inside a cardboard or other container.
PUMPS
The syrup in a B-I-B system is delivered to the beverage system through gas operated pumps. These pumps
extract the syrup out of the bags forcing the syrup throughout the system.
RACKING
Regardless if you are working on pre-mix or post-mix (B-I-B or Figal) system, a place will be designated for placement
of the product. A rack (or shelf) system affords systematic placement and complete usage of the beverage paid for.
The B-I-B rack allows the boxes to lay properly for syrup dispersal. Please check with your B-I-B syrup supplier. Some
boxes must be slightly tilted down, while others may be in virtually any position. The Figal tank rack keeps the newer
and full tanks organized at one end of the beverage line with the partial tanks at the other.
PRE-MIX & POST-MIX BEVERAGE DISPENSERS
Pre-Mix - Only a small number of systems use Pre-Mix,
usually for temporary or very low volume dispensing where
installation of a carbonator is not warranted.
Pre-Mix means that syrup and carbonated water are already mixed at the bottling plant, then chilled at the dispenser location before being served.
A memory peg for the meaning of Pre-Mix is that the
syrup and carbonated water are mixed together before
leaving the beverage valve.
Post-Mix - Most beverage systems are Post-Mix. Permanent dispensing locations with a mid to high volume
dispensing have Post-Mix systems, such as self-service dispensers in Convenience Stores, Restaurants
and Cafeterias.
24
Post-Mix means that syrup and carbonated water (or plain
tap water for non-carbonated drinks) are mixed together
in the valve nozzle of the dispenser, just before the finished beverage flows into the customer’s cup.
A memory peg for the meaning of Post-Mix is that the syrup
and water are mixed after leaving the beverage valve.
The two common Post-Mix systems are:
1. Bag-in-Box (BIB) - Most often, five gallons of
syrup is stored in a plastic bag inside a carton.
2. Figal - Most often, five gallons of syrup is stored
in a stainless steel canister.
Plumbing Diagram Label
The plumbing diagram label explains which inlet cold
plate fittings supply which dispenser valves.
Installation and Service Manual
OPERATION
BACK ROOM PACKAGE
BAG-IN-BOX SYSTEM
Creating Carbonated Water:
1. Incoming tap water - should be at a minimum dynamic pressure of 40 psi and maximum static pressure of 55 psi.
2. Carbonator Water pump motor - Powers the water pump. The water pump motor is part of the carbonator pump deck.
3. Carbonator Water pump - Pumps tap water into
the carbonator tank. The water pump is part of the
carbonator. The incoming water for the carbonator
must be first ran through the pump before connecting to the proper cold plate inlet.
4. Internal/External Carbonator tank - Combines
CO2 gas and tap water to form carbonated water.
The “carbonator” is the carbonator tank, water pump
and water pump motor.
On an ambient system, after being carbonated, the carbonated water is fed from the carbonator to the dispenser
cold plate for chilling. At the beverage valve, chilled water
and chilled syrup are mixed to create the finished beverage. A cold carbonated system pre-chills the water before entering the carbonator tank.
Pumping Syrup to the Dispenser:
5. CO2 cylinder - Holds highly pressurized carbon dioxide (CO2). The CO2 cylinder is a steel or aluminum cylinder tank. CO2 gas flows to the primary
pressure regulator.
6. Cylinder pressure gauge - Indicates amount of
CO2 gas in the cylinder.
7. Primary pressure regulator - Lowers the CO2 gas
pressure, to 100 psi, so the CO2 gas will be at the
proper pressure to enter the carbonator regulator.
8. Lowered outgoing pressure - Set for 75 psi.
Gauge indicated lowered outgoing pressure from
the CO2 cylinder after being routed through the primary pressure regulator at 100 psi..
9. Secondary pressure regulator - Lowers the CO2
gas pressure before the CO2 gas flows to the syrup
pump. CO2 pressure, 60 to 75 PSI, activates the
syrup pump.
10. Syrup pump - Draws syrup out of the bag-in-box
syrup package. Syrup flows through the syrup lines
to the dispenser for chilling, then dispensing. There
is a syrup pump for each bag-in-box syrup system.
11. Bag-In-Box syrup cartons - Box which contains a
plastic bag, filled with syrup.
25
OPERATION
FIGAL SYSTEM
1. CO2 cylinder - Holds highly pressurized carbon
dioxide (CO2 ). The CO2 cylinder is a steel or aluminum cylinder tank. CO2 gas flows to the primary
pressure regulator.
2. Primary pressure regulator - Lowers the CO2 gas
pressure, usually to 100 psi.
3. Lowered outgoing pressure gauge - Gauge indicates lowered outgoing pressure from the CO2 cylinder after being routed through the primary pressure regulator.
At a T-fitting, this line then forms two branches: One
branch feeds CO2 gas to the carbonator tank and the
other branch feeds CO2 gas to the Figal tanks.
26
Pumping Syrup to the Dispenser:
4. Secondary pressure regulator - Lowers the CO2
gas pressure, usually at 45-60 psi, before the CO2
gas flows to the Figal syrup tank. Diet syrup is usually 10-15 psi.
5. Syrup pump - Syrup flows through the syrup lines
to the dispenser for chilling, then dispensing.
6. Figal tanks - Steel tank which usually holds five
gallons of syrup. Several Figal tanks supply the
dispenser.
Installation and Service Manual
OPERATION
CARBONATION
The purpose of the carbonator is to take water and combine it with CO2 to create carbonated water. Tap water at street
water pressure (minimum 40 PSI dynamic or flowing pressure in a 1/2" water line) must be forced into a tank that
contains CO2 (usually at 100 PSI) by using a pump to raise the water pressure above the CO2 pressure. CO2 is
absorbed into the water as the water passes through the gas. Cooling and agitating the water will allow it to absorb
more CO2 gas. Chilling the mixture before dispensing will assist in locking the carbon dioxide into the water. After
dispensing, the CO2 may be unlocked from the liquid. The CO2 will gradually leave the liquid due to pressure and
temperature changes.
Components
The agitation of the water & CO2 together in the tank unThe components of the carbonator are: water pump, an der high pressure creates the soda water. The quality of
electric motor to operate the pump, carbonator tank carbonation (percent of CO2 mixed in the water) increases
as the water temperature decreases and exposure time
where the water & CO2 mix, and a water level control.
increases.
Operation
Carbon Dioxide (CO2) leaves the storage tank and ar- The water level in the carbonator tank is controlled by a
rives at the carbonator tank through the gas inlet. Water water level control in the tank. This control turns the pump
supply enters the carbonator pump inlet at regular street motor off and on to maintain a preset level of liquid in the
water line pressure (minimum 40 PSI dynamic or flowing tank. The water level control may be electronic probes or
pressure). The water pump increases the pressure of the a mechanical float.
water, which allows the water to flow into the carbonator
tank. The CO2 and the water mix together in the carbonator to produce the carbonated water that is then sent to
the soda dispenser.
INTERNAL CARBONATION
The carbonator tank has two inlets and one outlet connection, as well as a relief valve and two conductivity probes.
The water inlet is a double check valve topped with a 3/8"
flared fitting. The carbonator will be pre-plumbed as it leaves
the factory. If the carbonator needs to be serviced or if the
fittings need to be replaced, make sure a nylon washer is
used inside the CO2 inlet fitting to prevent leaks.
level control, which is a circuit board mounted inside the
electrical box that activates the pump and motor. Removing the cover of the electrical box will grant access
to the circuit board. As the control receives a signal from
the conductivity probes, it activates the pump motor,
which will pump water into the carbonator until the water
reaches the high probe.
The conductivity probes are used to control the level of
water inside the carbonator tank. The red probe, or the
“high” probe, is the shorter of the two. When the level
of the water reaches the bottom of the red probe, the
pump shuts off. When the water level inside the tank
goes below the bottom tip of the of the black or low
probe. Both probes are wired to the electronic liquid
The pump motor and electrical box are mounted together
on a single platform. The pump is a standard 125 GPH
brass rotary vane pump. The flared fittings accept the
same swivel/barb connectors used on the carbonator water connections. Also, water enters the pump from the
water source on the side that has the filter.
Notes:
• Pump Decks for internal carb units must be
within 6 feet of unit.
• Installation of a carbonator any further away
than the recommended distance is at installer/
owner's risk. Known issues can include, but is
not limited to poor carbonation and/or erratic
carbonation.
27
OPERATION
MD SERIES COUNTERTOP MEASUREMENTS
Letter
Description
MD-150
MD-175
MD-200/250
MD-250-36
A
Unit Width
22”
24”
30”
36"
B
Unit Depth
30 1/2"
30 1/2"
30 1/2"
30 1/2"
C
Outside Ice Bin Depth
22"
22 1/2"
22 1/2"
22 1/2"
D
Under Unit Width
18"
20"
26"
32"
E
Under Unit Depth
20 1/2"
20 1/2"
20 1/2"
20 1/2"
F
Recommended countertop Cut-out*
3"x13"
3"x14"
3"x18"
3"x18"
G
Maximum Countertop Cut-out*
18"x20 1/2"
20"x20 1/2"
26"x20 1/2"
32"x20 1/2"
CAUTION: *Cutting the countertop may decrease its strength. Counter should
be braced to support the dispenser countertop weight plus ice storage capacity and weight of icemaker, if applicable.
28
Installation and Service Manual
OPERATION
MD SERIES SPECIFICATIONS
MD Series dispensers have a stainless steel cabinet and lighted merchandiser standard. Beverage valves, coldplate
connections, drain connections and electrical components are front serviceable. MD Series dispensers drain through
a single 3/4" NPT connection to the drain pan. The standard voltage for MD Series dispensers is 120VAC-60Hz. A
power cord is provided with 120VAC-60Hz models only.
MD Series dispensers are available in the following optional voltages:
• 100VAC-50/60Hz
• 220VAC-50Hz
• 220VAC-60Hz
MD Series dispensers use a 1/7 hp gearmotor. Optimum ambient conditions for MD Series dispensers are between
500F and 950F.
MD-150
MD-175
MD-200
MD-250
MD-250-36
Dimensions
WxDxH
22" x 30 ½" x 33"
24" x 30 ½" x 34"
30" x 30 ½" x 33"
30" x 30 ½" x 39"
36" x 30 ½" x 39"
Ice Storage
150 lbs
175 lbs
200 lbs
250 lbs
250 lbs
Beverage
Valves
6
8
8 or 10
8 or 10
10 or 12
13 circuit
8 valve: 12 circuit
Soft plumbed
3-1-1-3 manifold
water circuits, 8
10 valve: 15 circuit
hard-plumbed
3-1-2-1-3 manifold
syrup circuits
Coldplate
9 circuit
3-2-1 manifold
12 circuit
3-1-1-3 manifold
8 valve: 12 circuit
3-1-1-3 manifold
10 valve: 15 Circuit
3-1-2-1-3 manifold
Amperage
2.5 FLA
2.8 FLA
2.5 FLA
2.5 FLA
2.5 FLA
Agitation Timer
Optional
Optional
Standard
Standard
Standard
Shipping
Weight
240 lbs
259 lbs
318 lbs
338 lbs
338 lbs
29
OPERATION
MDH SERIES COUNTERTOP MEASUREMENTS
Letter
Description
MDH-302
MDH-402
A
Unit Width
42 ¾"
60"
B
Unit Depth
30 ½ "
30 ½"
C
Outside Ice Bin Depth
22 ½"
22 ½"
D
Under Unit Width
38 ¾"
56 ½"
E
Under Unit Depth
20 ½"
21 ¼"
F
Recommended Countertop Cut-out*
3" X 32"
3" X 48"
G
Maximum Countertop Cut-out*
38 ¾" X 20 ½"
56 ½" X 21 ¼"
CAUTION: *Cutting the countertop may decrease its strength. Counter should
be braced to support the dispenser countertop weight plus ice storage capacity and weight of icemaker, if applicable.
30
Installation and Service Manual
OPERATION
MDH SERIES SPECIFICATIONS
MDH Series dispensers have a stainless steel cabinet and lighted merchandiser standard. Beverage valves, coldplate
connections, drain connections and electrical components are front serviceable. MDH Series dispensers drain
through a two 3/4" NPT connection to the drain pan. The standard voltage for MDH Series dispensers is 120VAC60Hz. A power cord is provided with 120VAC-60Hz models only.
MDH Series dispensers are available in the following optional voltages:
• 100VAC-50/60Hz
• 220VAC-50Hz
• 220VAC-60Hz
MDH Series dispensers use two 1/7 hp gearmotor. Optimum ambient conditions for MDH Series dispensers are
between 500F and 950F.
MDH-302
MDH-302 w/EM
MDH-402
MDH-402 w/24" EM MDH-402 w/34" EM
DimensionsW
xDxH
42 ¾"" x 30 1/2" x 33"
42 ¾" x 30 ½" x 44" 60" x 30 ½" x 32" 60" x 30 ½" x 44"
60" x 30 ½" x 54"
Ice Storage
300 lbs
300 lbs
400 lbs
400 lbs
400 lbs
Beverage
Valves
10 or 12
10 or 12
16 or 20
16 or 20
16 or 20
16 valve: Two (2)
12 circuit
3-1-1-3 manifold
20 valve: Two (2)
15 circuit
3-1-2-1-3 manifold
16 valve: Two (2)
12 circuit
3-1-1-3 manifold
20 valve: Two (2)
15 circuit
3-1-2-1-3 manifold
Coldplate
Two (2) 9 circuit
3-2-1 manifold
Two (2) 9 circuit
3-2-1 manifold
16 valve: Two (2)
12 circuit
3-1-1-3 manifold
20 valve: Two (2)
15 circuit
3-1-2-1-3
manifold
Amperage
3.5 FLA
4.0 FLA
4.5 FLA
4.5 FLA
5.0 FLA
Agitation Timer
Standard
Standard
Standard
Standard
Standard
Shipping
Weight
430 lbs
490 lbs
615 lbs
715 lbs
715 lbs
31
OPERATION
ROCKING CHUTE ICE DELIVERY SWITCH ADJUSTMENT
32
1
To properly adjust the switch, first unplug the power
cord to the unit then remove the merchandiser. This
will give you access to the ice delivery switch located on the left side of the rocking chute.
2
Begin by observing the chute by slowly pushing
against the rocking chute. When the ice delivery
switch clicks, measure the distance from the door
stops on the rocking chute bracket to the door. The
distance between the two should be no more than
1/4", but no less than 1/16".
3
The left side of the rocking chute has a tab that
pushes up on the ice delivery switch. To adjust it,
use needle nose pliers and bend the arm of the
switch up or down in order to change the point where
the tab makes contact with the switch arm.
Installation and Service Manual
OPERATION
SETTING THE AUTOMATIC AGITATION TIMER
Some MD Series ice / beverage dispensers have an optional timer, which agitates ice stored in the dispenser bin.
The timer is preset at the factory for three seconds ice agitation every three and one half hours. Beginning July,
1999 this timer is not adjustable. To reset the older style timer, use the following procedure:
1. Place a small screwdriver in the adjustment pot
marked “ON” (See illustration at right).
2. Gently turn the adjustment pot counterclockwise
until the adjustment pot will no longer turn. One of
the cross hairs on the dial will be approximately in
the “7 o’clock” position.
3. Turn the adjustment pot clockwise, approximately
to the “10 o’clock” position. This is two notches past
the zero setting and sets the timer for approximately
three seconds of ice agitation.
4. Place a small screwdriver in the adjustment pot
marked “OFF” (See illustration at right).
5. Gently turn the adjustment pot counterclockwise until
the adjustment pot will no longer turn. One of the
cross hairs on the dial will be approximately in the “7
o’clock” position. This sets the adjustment pot at zero
hours of timing between agitation periods.
6. Turn the adjustment pot to the right, approximately to
the “2 o’clock” position. This is approximately nine
notches past the zero setting and sets the timer for
agitation approximately every three and one half hours.
To test the adjustable timer, turn the “ON” time to the
correct three second position. Turn the “OFF” time to
the zero “7 o’clock” position. Do not disturb the dispenser
for 15 minutes. The timer will operate if good.
Dispensers made since July 1999 (99G) have non adjustable timers. To test these timers, unplug the dispenser, wait five seconds, then plug the dispenser in. If
the timer is good, it will agitate immediately upon the
dispenser being plugged in.
115V/220V NON ADJUSTABLE AGITATION TIMER
The agitation timer on this unit is equipped with test pins. This allows you to test the timer by removing the jumper
between the two pins. When the jumper is removed the timer will cycle every 55 seconds if it is operating correctly.
If the timer is wired correctly and does not cycle approximately every 55 seconds when the jumper is removed,
replacement of the timer may be necessary. Make sure to replace the jumper pins when finished.
NOTES: This timer is re-settable, timed agitation every 3.5 hours from last dispense on power supply broken.
Never operate in normal mode without test pins in place, damage could occur.
33
OPERATION
SEQUENCE OF OPERATION
Manufactured before early 1994
Manufactured beginning early 1994
Pulley
Microswitc
Solenoid/Door Mount
Door Bumper
Plunger
Cable
Door
Solenoid
F
SH
PU
IC
OR
E
Customer’s cup presses rocking chute push lever or
customer’s hand presses push button. The clear plastic
arm at the top and the left rear of the clear plastic chute
pushes upward on the door.
Customer’s cup presses against the push plate. The push
plate raises the microswitch actuator arm located on the
right side of the ice dispense chute. The microswitch
actuator arm activates the microswitch.
The door pivots up from the left and right mounting brackets.
The microswitch activates the solenoid, which pulls down
the solenoid plunger. The plunger is connected to a
cable, which is connected to a pulley, then another cable
raises the door of the ice chute.
The clear plastic arm at the top and left rear of the ice
chute also activates the lever of the micro switch. When
activated, the micro switch starts the gear motor. The
gear motor turns the paddle wheel and agitator arm.
When the paddle wheel turns, ice is carried from the
bottom of the bin to the dispense point. Ice falls forward
through the open door, into the ice chute and to the
customer’s cup.
The microswitch also activates the gear motor. The gear
motor turns the agitator and paddle wheel, lifting ice from
the bottom of the bin to the ice dispense point. Ice falls
forward through the open door, through the bin spout,
into the ice chute and to the customer’s cup.
The door lock keeps the door shut during periodic agitation. Periodic agitation is optional on the MD-150 and
MD-175. Periodic agitation is standard on the MD-200,
MD-250, MD 250-36, and MDH-302.
Push Button Ice Dispensing, Solenoid, Cable Style Door
During periodic agitation, the paddle wheel and agitator
turn for approximately three seconds every three and
one half-hours of non-use. Since ice is brought forward
during periodic agitation, ice would fall through the ice
dispense door if the door lock was not present.
The push button energizes the plunger micro- switch.
The microswitch activates the solenoid, which pulls down
the solenoid plunger. The plunger is connected to a
cable, which is connected to a pulley, then another cable
raises the door of the ice chute.
Customer’s finger presses the push button, located in
the merchandiser frame. The button is labeled, “PUSH
FOR ICE”.
The microswitch also activates the gear motor. The gear
motor turns the agitator and paddle wheel, lifting ice from
the bottom of the bin to the ice dispense point. Ice falls
forward through the open door, through the bin spout,
into the ice chute and to the customer’s cup.
34
Installation and Service Manual
USER MAINTENANCE
PREVENTATIVE MAINTENANCE
Preventative maintenance is a vital part of keeping your Servend dispenser in top condition. Following the guidelines
below will assist you in continued trouble free operation of your unit. Contact MBE at 1-800-367-4233 for more
information about our ProActive Maintenance Program.
1. Conduct daily maintenance of the machine.
Possible excess ice storage reasons:
2. Perform monthly maintenance of the machine.
• Storage capacity exceeds daily requirements.
3. Perform periodic maintenance and sanitizing of bev• Low demand during the off season.
erage system.
• Dispenser oversized with future growth in mind.
4. Do not overfill the dispenser bin with ice.
Lower ice storage to meet one day’s needs. If you manu5. Do not allow the dispenser to sit for prolonged perially fill ice, fill only with the appropriate amount of ice.
ods of non use with ice in the bin.
Fill the dispenser with fresh ice each morning. Do not fill
6. Most ice dispenser service problems are caused
the dispenser at night just before shut down. Ice cubes
by low usage of the ice dispenser.
can freeze together if not dispensed.
7. Do not allow ice to remain in the bin more than a
day in order to prevent ice from freezing together
and/or stagnant ice.
HOW TO DISASSEMBLE FOR CLEANING OR MAINTENANCE
NOTE: Sanitize the ice dispenser at Initial Start-UP in
addition to monthly sanitizing. You will need screwdriver in
order to disassemble.
Disassemble parts in the following order:
A.
B.
C.
D.
C
E
D
G
F
ER
NG
DA
A
B
R
FO
SH
PU
ICE
Merchandiser
Ice chute
Paddle wheel pin
Agitator
E. Paddle wheel
F. Bin liner
G. Paddle wheel Area
Accessing a Dispenser Bin Top Mounted with a Manitowoc Cuber:
1. Remove the front panel of the ice machine.
2. Remove the ice deflection baffle. This will give you
access to the dispenser bin.
Accessing a Dispenser Bin that is Top Mounted with a
Manitowoc Cuber and Large Extended Merchandiser
in front of the Cuber:
1. Access to the bin is possible through the strip lids on
the side of the Dispenser.
Disassembling the Dispenser Parts for Bin Cleaning:
1. Remove the front panel of the Manitowoc ice maker.
2. If the Manitowoc ice maker is operating, wait for the
sheet of ice to fall into the dispenser bin.
When the ice sheet falls into the dispenser bin, immediately place toggle switch of the ice machine to the “OFF”
position.
If the Manitowoc ice maker is NOT operating, place the
toggle switch of the ice machine to the “OFF” position.
3. On MD models without a top mounted cuber, remove
the plastic lit from the top of the dispenser.
4. Remove all ice from the dispenser.
5. Disconnect electrical power to the dispenser.
6. On the MD-302 dispenser only, remove the strip lids
off the top left and top right of the dispenser bin.
7. For the MD-302 dispenser only, there is a left bin and
a right bin. Clean and sanitize one bin, then follow the
same procedures on the second bin.
35
USER MAINTENANCE
HOW TO DISASSEMBLE FOR CLEANING OR MAINTENANCE
8
10
Agitator arm and paddle wheel pin:
8. Rotate the agitator arm so the paddle wheel pin
handle is pointing up, toward the ceiling. For the
MD-302 dispenser only, reach inside the bin through
the area where the strip lid has been removed.
9. Loosen the hand-removable paddle wheel pin from
the agitator by twisting counter clockwise until it
snaps from the agitator bar...
10. Then remove the paddle wheel pin from the hole in
the agitator.
11. Push the agitator bar toward the back of the unit
until the agitator is free of the paddle wheel hub.
12. Move the front of the agitator to one side and slide
the agitator forward until the rear of the agitator shaft
is clear of the bushing.
13. Remove the agitator from the bin area.
11
9
Paddle wheel, bin liner and paddle wheel area:
14. Slide the paddle wheel from its shaft.
15. Loosen the four knurled fasteners that hold the bin
liner in place.
16. Remove the bin liner.
17. Remove the paddle wheel area from the bin.
For the MD-302 dispenser only, remove the paddle wheel
area to the back of the bin.
14
18. Discard the remaining ice in the bin.
17
15
16
N
DA
R
FO
SH
PU
36
ICE
R
GE
Installation and Service Manual
USER MAINTENANCE
HOW TO DISASSEMBLE FOR CLEANING OR MAINTENANCE
Disassemble the rocking chute:
1. Loosen the two knurled fasteners that hold the
merchandiser in place.
2. Remove the merchandiser.
3. Remove outer bracket.
4. Remove door lock.
5. Remove door.
6. Remove ice chute.
7. Model MD-302 has two rocking chutes. Remove both
rocking chutes using the same procedure above.
Disassemble the solenoid style chute:
1. Loosen the knurled fastener on both sides of the
outer chute and remove chute from the dispenser.
1
4
2
3
SH
PU
E
R IC
FO
ING
PLUMB AM
R
DIAG
6
I NG
PLUMB AM
R
DIAG
5
SH
PU
E
R IC
FO
37
USER MAINTENANCE
DAILY CLEANING
All cleaning must meet your local health department regulations. The following cleaning instructions are
provided as a guide.
CAUTION: Use only warm soapy water to clean the exterior of the tower. Do not use solvents or
other cleaning agents. Do not pour hot coffee into the drain pan. Pouring hot coffee down the
drain pan can eventually crack the drain pan, especially if the drain pan is cold or still contains ice.
Clean the exterior and drain pan:
1. Turn off the key switch located on either right or left
side of the unit.
2. Lift the grid and remove it from the drain pan.
3. Using mild soap, warm water and a clean cloth, wipe
the drain pan and splash panel. Then, rinse with clean,
warm water. Allow plenty of warm (not hot) water to
run down the drain of the drain pan, to remove syrup
residue that can clog the drain opening.
4. Wash the grid, then rinse with clean water. Place
the grid back in the drain pan.
5. Wash all exterior surfaces of the unit with warm
water and a clean cloth. Wipe again with a clean,
dry cloth.
Clean the dispensing valves:
6. Remove nozzles and diffusers from beverage
valves.
7. Rinse nozzle and diffuser with warm, clean water.
8. Clean nozzles and diffusers with soapy water and
a soft bristle brush.
9. Clean the underside of the beverage valves with
warm, soapy water. Rinse with clean damp towel.
10. Replace nozzles and diffusers on valves.
11. Turn on the key switch.
38
Installation and Service Manual
USER MAINTENANCE
MONTHLY CLEANING
Clean and sanitize the ice bin and cold plate:
1. Unplug unit and remove all ice from the ice bin.
2. Mix a solution of mild detergent to clean the dispenser
bin and components.
3. Wash the ice bin using a sponge and the mild detergent solution.
4. Using the mild detergent solution and a soft bristle brush
or clean cloth, clean the following dispenser parts:
• Cold plate
• Entire bin
• Paddle wheel
• Paddle wheel area
• Agitator
• Paddle wheel pin
• Ice Chute
• Rear bushing
• Motor shaft
• Strip lids (where applicable)
Removable front
merchandiser
Agitator
Ice bin
Beverage valve
Stainless steel
bin liner
Cold plate
Ice
Water
Paddle wheel
Syrup
Cold plate
Gear motor
Drain pan
Rocking chute
ice dispense chute
5. Rinse all the parts in clean, running water.
6. Prepare 2 gallons of sanitizing solution by mixing a 1/2
ounce of household bleach (that contains 5.25% sodium hypochlorite) with 2 gallons of 120°F water. The
mixture should not exceed 100 PPM of chlorine. Or
mix a solution of any approved sanitizer, following the
directions for mixing and applying the sanitizer..
7. Sanitize the ice bin and cold plate with the sanitizing
solution for at least 10 seconds.
8. Allow to air dry. Do not rinse.
Reassembling the dispenser parts:
9. Reassemble parts in the following order:
• Bin liner
• Paddle wheel
• Agitator
• Paddle wheel pin
• Ice chute
• Merchandiser
10. Hand tighten all knurled fasteners.
11. Pour in fresh, sanitary ice and replace the plastic lid
on the top of the dispenser.
12. Plug in the unit’s electrical cord.
13. Check for proper ice dispensing.
S
PU
OR
HF
ICE
I NG
PLUMB AM
R
DIAG
39
USER MAINTENANCE
BEVERAGE SYSTEM CLEANING
Sanitize the beverage system at initial start-up as well as regularly scheduled cleaning. The drain pan must be in
place under soda valves, to carry away detergent and sanitizing agents that will be flushed through valves.
BAG-IN-BOX SYSTEM
The procedure below is for the sanitation of one syrup circuit at a time. Repeat to sanitize additional circuits.
You will need the following items to clean and sanitize the
Bag-in-Box (BIB) beverage system:
•
•
•
•
Three (3) clean buckets
Plastic brush or soft cloth
Mild detergent
Unscented bleach (5% Na CL O) or
Commercial sanitizer
• Bag-In-Box bag connector
1. Prepare the following in the buckets:
• Bucket 1 - warm to hot tap water for rinsing.
• Bucket 2 - mild detergent and warm to hot water.
• Bucket 3 - mix a solution of unscented bleach
(5% Na CL O) or commercial sanitizer and warm
to hot water. Mixture should supply 100 PPM available chlorine (1/4 oz. bleach to 1 gallon water).
2. Disconnect the “syrup-line side” of the bag-in-box
connector.
3. Rinse connector with warm tap water.
4. Connect syrup connector to BIB connector and immerse both into Bucket 1. A “bag-side” connector
can be created by cutting the connector from an
empty disposable syrup bag.
5. Draw rinse water through system until clean water
is dispensed. Most beverage valves allow the syrup
side to be manually activated by depressing the
syrup pallet.
6. Connect Bucket 2 to system.
7. Draw detergent solution through system until solution is dispensed.
8. Repeat steps 2-7 until all syrup circuits contain detergent solution.
9. Allow detergent solution to remain in the system for
5 minutes.
40
Installation and Service Manual
USER MAINTENANCE
BAG-IN-BOX SYSTEM
10. Connect Bucket 3 to system.
11. Draw sanitizing solution through system until solution is dispensed.
12. Repeat step 11 until all syrup circuits contain sanitizer solution.
13. Allow sanitizer solution to remain in system for 15
minutes.
14. Remove nozzles and diffusers from beverage valves.
15. Scrub nozzles, diffusers and all removable valve
parts (except electrical parts) with a plastic brush
or a soft cloth and the detergent solution.
16. Soak nozzles, diffusers and removable valve parts
(except electrical parts) in sanitizer for 15 minutes.
17. Replace nozzles, diffusers and valve parts.
18. Connect Bucket 1 to system.
19. Draw rinse water through system until no presence
of sanitizer is detected.
20. Attach syrup connectors to BIB’s.
21. Draw syrup through system until only syrup is dispensed.
22. Discard first 2 drinks.
FIGAL BEVERAGE SYSTEM
1. Prepare the following in three clean Figal tanks:
• Rinse tank - fill with room temperature tap water.
• Detergent tank - mix approved beverage system
cleaner with warm water as directed.
• Sanitizing tank - mix a solution of unscented
bleach (5% Na CL O) or commercial sanitizer
and warm to hot water. Mixture should supply
100 PPM available chlorine (1/4 oz. bleach to 1
gallon water).
2. Disconnect all product and water lines from product
tanks and remove carbonator.
3. Locate the Figal syrup tank for the circuit to be sanitized. Remove both quick disconnects from the Figal
syrup tank. Rinse quick disconnects in tap water.
4. Connect rinse tank to the syrup line. Draw clean
rinse water through the valve until syrup is flushed
from the system.
5. Connect detergent tank to the syrup line and draw
detergent through the valve for two minutes. Then,
allow remaining detergent to stay in the system for
five minutes.
6. Connect rinse tank to the syrup line. Draw clean
rinse water through the valve until detergent is
flushed from the system.
7. Remove valve nozzle and diffuser as shown in Daily
Cleaning instructions on Pages 25 and 26. Using a
plastic brush or a soft cloth and warm water, scrub
the nozzle, diffuser, bottom of the dispensing valve
and cup lever, if applicable.
8. Place removable valve parts (EXCEPT solenoids)
in sanitizing solution for 15 minutes.
9. Replace valve diffuser and nozzle on the beverage
valve.
10. Connect sanitizer tank to the syrup line and draw
sanitizer through the valve for two minutes. Allow
sanitizer to remain in the system for a minimum of
15 minutes.
11. Reconnect syrup and carbonated water lines.
12. Draw syrup through the lines to rinse the system.
Discard drinks until at least two cups of satisfactory
tasting beverage are dispensed through the valve.
41
EXPLODED VIEWS, PARTS & DIAGRAMS
MD 150/175/200/250 EXPLODED VIEW
42
Installation and Service Manual
EXPLODED VIEWS, PARTS & DIAGRAMS
MD 150 PARTS LIST
MD 175 PARTS LIST
43
EXPLODED VIEWS, PARTS & DIAGRAMS
MD 200/250 PARTS LIST
44
Installation and Service Manual
EXPLODED VIEWS, PARTS & DIAGRAMS
MDH 302/402 EXPLODED VIEW
45
EXPLODED VIEWS, PARTS & DIAGRAMS
MDH 302 PARTS LIST
MDH 402 PARTS LIST
46
Installation and Service Manual
EXPLODED VIEWS, PARTS & DIAGRAMS
MD 150 115V PRE-MIX WIRING DIAGRAM
CAUTION
ELECTRICAL SHOCK HAZARD
DISCONNECT POWER
BEFORE SERVICING
MERCHANDISING LAMP (250)
BLACK
OPTIONAL
THERMOSTAT
MERCHANDISING LAMP
IN
BLACK
PURPLE
ORANGE
OUT
WHITE
LIGHT
STARTER
BALLAST
BLACK
BLACK
BALLAST
5
1
OPTIONAL
AUDIBLE ALARM
BLUE
3
BLUE
WHITE
GRAY
4
2
RED
YELLOW
OPTIONAL
AGITATION
TIMER
BUZZER
3
2
1
WHITE
TIMER
PURPLE
BLACK
BLACK
ORANGE
WHITE
WHITE
LIGHT
STARTER
G
OPTIONAL
EMPTY LIGHT
ICE DISPENSE
SWITCH
BLUE
YELLOW
BLUE
NO
COMMON
NC
BLACK
MOTOR
POWER CORD
PREMIX
115 VOLT
5029411-0
47
EXPLODED VIEWS, PARTS & DIAGRAMS
MD 150/175/200 115V WIRING DIAGRAM
TO RESET TRANSFORMER:
CAUTION
(115 VOLT UNITS ONLY)
1. DISCONNECT POWER SUPPLY.
2. PRESS RESET BREAKER SWITCH
ON TRANSFORMER.
3. REPLACE MERCHANDISER
(FRONT ENCLOSURE).
4. RECONNECT POWER SUPPLY.
ELECTRICAL SHOCK HAZARD
DISCONNECT POWER
BEFORE SERVICING
115 VOLT
MERCHANDISING LAMP
BLACK
PURPLE
WHITE
OPTIONAL
THERMOSTAT
IN
OPTIONAL
AGITATION
TIMER
BALLAST
BLACK
OUT
4
2
BLACK
LOAD
BLUE
WHITE
BLACK
LOAD
LINE
OPTIONAL
AUDIBLE ALARM
BLUE
WHITE
BLACK
PURPLE
BLACK
GRAY
WHITE
BLUE
LINE
1
BLUE
WHITE
5
TRANSFORMER
3
RED
YELLOW
ORANGE
BLACK
LIGHT
STARTER
BLACK
G
BUZZER
3
W
2
1
TIMER
BLUE
WHITE
ORANGE
WHITE
BLUE
NO
VALVE
KEYSWITCH
YELLOW
BLUE
OPTIONAL
POWER CORD
COMMON
NC
ICE DISPENSE
SWITCH
BLACK
OPTIONAL
EMPTY LIGHT
BLACK
MOTOR
BLACK
PUSH
PUSH
BLACK
BLACK
WHITE
WHITE
BEVERAGE
VALVE
48
ALL REMAINING VALVES ARE WIRED IN PARALLEL
BEVERAGE
VALVE
PN#: 5029413
REV#: 0
Installation and Service Manual
EXPLODED VIEWS, PARTS & DIAGRAMS
MD 150 220V PRE-MIX WIRING DIAGRAM
CAUTION
ELECTRICAL SHOCK HAZARD
DISCONNECT POWER
BEFORE SERVICING
MERCHANDISING LAMP (250)
BLACK
OPTIONAL
THERMOSTAT
MERCHANDISING LAMP
IN
BLACK
PURPLE
ORANGE
OUT
WHITE
OPTIONAL
AGITATION
TIMER
LIGHT
STARTER
BALLAST
BLACK
BLACK
5
1
WHITE
OPTIONAL
AUDIBLE ALARM
BLUE
3
BLUE
GRAY
4
2
BALLAST
RED
GREEN
YELLOW
G
BUZZER
3
2
1
BLACK
BLACK
BROWN
ORANGE
PURPLE
WHITE
WHITE
LIGHT
STARTER
N L1
TIMER
WHITE
BLUE
OPTIONAL
EMPTY LIGHT
ICE DISPENSE
SWITCH
BLUE
YELLOW
BLUE
NO
COMMON
NC
BLACK
MOTOR
220/240 VOLT
5029427-0
49
EXPLODED VIEWS, PARTS & DIAGRAMS
MD 150/175/200 220V WIRING DIAGRAM
CAUTION
220/240 VOLT
ELECTRICAL SHOCK HAZARD
DISCONNECT POWER
BEFORE SERVICING
WHITE
RED
MERCHANDISING LAMP
PURPLE
BLACK
OPTIONAL
THERMOSTAT
BALLAST
BLACK
OUT
WHITE
BLACK
BLACK
LINE
LOAD
LOAD
N L1
LINE
OPTIONAL
AUDIBLE ALARM
BLUE
2
1
TIMER
WHITE
WHITE
BLUE
NO
YELLOW
NC
WHITE
BLUE
ICE DISPENSE
SWITCH
OPTIONAL
BLACK
ORANG
COMMON
E
OPTIONAL
EMPTY LIGHT
BLACK
VALVE
KEYSWITCH
BUZZER
3
BLACK
BLUE
RED
BLUE
PURPLE
WHITE
BROWN
GRAY
1
ORANGE
WHITE
5
BLUE
3
BLUE
BLUE
BLACK
TRANSFORMER
YELLOW
GREEN
BLACK
4
2
YELLOW
OPTIONAL
AGITATION
TIMER
G
IN
BLUE
MOTOR
BLACK
PUSH
BEVERAGE
VALVE
50
PUSH
BLACK
BLACK
WHITE
WHITE
ALL REMAINING VALVES WIRED IN PARALLEL
BEVERAGE
VALVE
PN#: 5029429
REV. 0
Installation and Service Manual
EXPLODED VIEWS, PARTS & DIAGRAMS
MD 250 115V WIRING DIAGRAM
TO RESET TRANSFORMER:
CAUTION
(115 VOLT UNITS ONLY)
1. DISCONNECT POWER SUPPLY.
2. PRESS RESET BREAKER SWITCH ON TRANSFORMER.
3. REPLACE MERCHANDISER (FRONT ENCLOSURE).
4. RECONNECT POWER SUPPLY.
ELECTRICAL SHOCK HAZARD
DISCONNECT POWER
BEFORE SERVICING
115 VOLT
WHITE
RED
OPTIONAL MERCHANDISING LAMP
BLACK
PURPLE
OPTIONAL MERCHANDISING LAMP
PURPLE
BLACK
OPTIONAL
AGITATION
TIMER
2
WHITE
OPTIONAL
THERMOSTAT
IN
BLACK
YELLOW
RED
4
BLACK
BALLAST
BALLAST
BLUE
BLACK
ORANGE
BLACK
OUT
WHITE
BLUE
WHITE
B
BLACK
WHITE
BLACK
LINE
LOAD
LOAD
LINE
OPTIONAL
AUDIBLE ALARM
BLUE
BLACK
LIGHT
STARTER
LIGHT
RED
STARTER
WHITE
BLACK
GRAY
PURPLE
1
BLUE
WHITE
5
TRANSFORMER
3
BLACK
3
W
G
BUZZER
2
1
TIMER
BLUE
ORANG
E
WHITE
BLUE
BLACK
NO
WHITE
YELLOW
NC
ICE DISPENSE
SWITCH
BLACK
BLUE
VALVE
KEYSWITCH
OPTIONAL
EMPTY LIGHT
COMMON
OPTIONAL
POWER CORD
MOTOR
BLACK
PUSH
BEVERAGE
VALVES
PUSH
BLACK
BLACK
WHITE
WHITE
BEVERAGE
VALVES
PN#:5029414
REV. 0
51
EXPLODED VIEWS, PARTS & DIAGRAMS
MD 250 220V WIRING DIAGRAM
CAUTION
220/240 VOLT
ELECTRICAL SHOCK HAZARD
DISCONNECT POWER
BEFORE SERVICING
WHITE
RED
OPTIONAL MERCHANDISING LAMP
BLACK
PURPLE
OPTIONAL MERCHANDISING LAMP
PURPLE
BLACK
OPTIONAL
AGITATION
TIMER
G
4
2
WHITE
OPTIONAL
THERMOSTAT
IN
BLACK
YELLOW
RED
BLACK
BALLAST
BLUE
BALLAST
BLACK
ORANGE
BLACK
OUT
PURPLE
LINE
1
WHITE
WHITE
LOAD
BLUE
BLACK
WHITE
LOAD
BLACK
LINE
BLUE
WHITE
5
OPTIONAL
AUDIBLE ALARM
BLUE
BLACK
PURPLE
GRAY
BROWN
BLUE
N L1
TRANSFORMER
GREEN
3
BUZZER
3
BLACK
2
WHITE
LIGHT
STARTER
LIGHT
STARTER
1
RED
TIMER
BLUE
WHITE
ORANG
E
WHITE
BLUE
BLACK
NO
WHITE
YELLOW
NC
ICE DISPENSE
SWITCH
BLACK
BLUE
VALVE
KEYSWITCH
OPTIONAL
EMPTY LIGHT
COMMON
OPTIONAL
MOTOR
BLACK
PUSH
BEVERAGE
VALVES
52
PUSH
BLACK
BLACK
WHITE
WHITE
ALL REMAINING VALVES WIRED IN PARALLEL
BEVERAGE
VALVES
PN#:5029430
REV. 0
Installation and Service Manual
EXPLODED VIEWS, PARTS & DIAGRAMS
MDH 302 115V WIRING DIAGRAM
TO RESET TRANSFORMER:
CAUTION
(115 VOLT UNITS ONLY)
1. DISCONNECT POWER SUPPLY.
2. PRESS RESET BREAKER SWITCH
ON TRANSFORMER.
3. REPLACE MERCHANDISER
(FRONT ENCLOSURE).
4. RECONNECT POWER SUPPLY.
ELECTRICAL SHOCK HAZARD
DISCONNECT POWER
BEFORE SERVICING
OPTIONAL MERCHANDISING LAMP
BLACK
OPTIONAL MERCHANDISING LAMP
BALLAST
BALLAST
ICE DISPENSE
SWITCH
BLUE
BLUE
LINE
LOAD
LOAD
WHITE
WHITE
LINE
RED
WHITE
LINE
OPTIONAL
AUDIBLE ALARM
BLUE
BLACK
1
BLACK
BLACK
GRAY
LOAD
OUT
ORANGE
4
3
5
COMMON
PURPLE
PURPLE
YELLOW
2
LINE
LOAD
NO
NC
YELLOW
OPTIONAL
AGITATION
TIMER
BLACK
ICE DISPENSE
SWITCH
IN
BLUE
BLACK
BLUE
BLUE
NO
NC
TRANSFORMER
BUZZER
3
RED
2
1
LIGHT
BLACK
STARTER
LIGHT
WHITE
STARTER
TIMER
G
WHITE
BLUE
VALVE
KEYSWITCH
WHITE
OPTIONAL
OPTIONAL
EMPTY LIGHT
POWER CORD
BLUE
BLUE
WHITE
COMMON
BLACK
TRANSFORMER
BLACK
OPTIONAL
THERMOSTAT
PUSH
WHITE
BLUE
BEVERAGE
VALVES
ALL REMAINING VALVES ARE WIRED IN PARALLEL
LEFT MOTOR
PUSH
BLACK
RIGHT MOTOR
BEVERAGE
VALVES
ALL REMAINING VALVES ARE WIRED IN PARALLEL
5029415
REV. 0
53
EXPLODED VIEWS, PARTS & DIAGRAMS
MDH 302 220V WIRING HARNESS
CAUTION
220/240 VOLT
ELECTRICAL SHOCK HAZARD
DISCONNECT POWER
BEFORE SERVICING
OPTIONAL MERCHANDISING LAMP
BLUE
BLUE
BALLAST
ICE DISPENSE
SWITCH
BLACK
BLACK
BLACK
5
LOAD
1
LOAD
LOAD
WHITE
WHITE
WHITE
LINE
WHITE
BLACK
BROWN
LINE
OPTIONAL
AUDIBLE ALARM
BLUE
LOAD
LINE
BLACK
TRANSFORMER
3
GRAY
4
LINE
BLUE
BLUE
WHITE
YELLOW
2
OUT
YELLOW
OPTIONAL
AGITATION
TIMER
BLACK
ICE DISPENSE
SWITCH
NO
NC
IN
BLUE
ORANGE
NO
NC
BLUE
BLACK
BLUE
OPTIONAL
THERMOSTAT
COMMON
WHITE
BALLAST
RED
RED
BLUE
TRANSFORMER
BLUE
RED
RED
BLUE
BLUE
COMMON
BLUE
BLUE
OPTIONAL MERCHANDISING LAMP
BUZZER
3
2
1
TIMER
BLUE
WHITE
BLACK
WHITE
OPTIONAL
L1 N
WHITE
BLUE
VALVE
KEYSWITCH
BLUE
BROWN
OPTIONAL
EMPTY LIGHT
G
BLUE
WHITE
BLUE
PUSH
WHITE
BLUE
BEVERAGE
VALVES
ALL REMAINING VALVES ARE WIRED IN PARALLEL
54
LEFT MOTOR
PUSH
BLACK
RIGHT MOTOR
BEVERAGE
VALVES
ALL REMAINING VALVES ARE WIRED IN PARALLEL
5029431
REV. 0
Installation and Service Manual
EXPLODED VIEWS, PARTS & DIAGRAMS
MDH 402 115V WIRING DIAGRAM
55
EXPLODED VIEWS, PARTS & DIAGRAMS
MDH 402 220V WIRING DIAGRAM
TO RESET TRANSFORMER:
CAUTION
(115 VOLT UNITS ONLY)
MDH-402
1. DISCONNECT POWER SUPPLY.
2. PRESS RESET BREAKER SWITCH
ON TRANSFORMER.
3. REPLACE MERCHANDISER
(FRONT ENCLOSURE).
4. RECONNECT POWER SUPPLY.
ELECTRICAL SHOCK HAZARD
DISCONNECT POWER
BEFORE SERVICING
DWG#: 5029432
REV. 0
220/240 VOLT
RED
WHITE
RED
WHITE
OPTIONAL MERCHANDISING LAMP
OPTIONAL MERCHANDISING LAMP
BLACK
BLACK
PURPLE
PURPLE
PURPLE
PURPLE
BALLAST
BALLAST
BLACK
LIGHT
STARTER
LIGHT
STARTER
BLACK
RED
WHITE
RED
WHITE
MERCHANDISING LAMP
MERCHANDISING LAMP
BLACK
BLACK
PURPLE
PURPLE
WHITE
BALLAST
WHITE
BALLAST
BLACK
BLACK
BLACK
LOAD
BLUE
BLACK
LOAD
LINE
WHITE
BLACK
BLACK
WHITE
5
WHITE
BLACK
LOAD
BLACK
LINE
BLACK
BLACK
BLACK
G
LIGHT
STARTER
BLUE
WHITE
BLUE
YELLOW
BLUE
NO
COMMON
NC
ICE DISPENSE
SWITCH
BLACK
BROWN
LIGHT
STARTER
WHITE
OPTIONAL
BLACK
MOTOR
PUSH
PUSH
PUSH
BLACK
BLACK
WHITE
ALL ADDITIONAL VALVES ARE WIRED IN PARALLEL
ICE DISPENSE
SWITCH
BLACK
BLACK
WHITE
WHITE
BEVERAGE
VALVE
BEVERAGE
VALVE
COMMON
NC
BLACK
PUSH
WHITE
YELLOW
BLUE
L1 N
OPTIONAL
MOTOR
BLACK
BLUE
NO
VALVE
KEYSWITCH
BLACK
56
LOAD
BLUE
WHITE
VALVE
KEYSWITCH
BEVERAGE
VALVE
LINE
1
WHITE
PURPLE
BLACK
4
2
3
WHITE
WHITE
WHITE
RED
LINE
TRANSFORMER
WHITE
1
WHITE
BLACK
TRANSFORMER
YELLOW
4
2
3
5
PURPLE
OPTIONAL
AGITATION
TIMER
WHITE
BLACK
RED
YELLOW
OPTIONAL
AGITATION
TIMER
ALL ADDITIONAL VALVES ARE WIRED IN PARALLEL
BEVERAGE
VALVE
BLACK
Installation and Service Manual
TROUBLESHOOTING
PUMP
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
Black and/or red probe shorted
Remove probes and bend straight or replace with new
probe(s)
Problem with motor or motor wiring
Check line voltage first. Check AC voltage across
load terminals on Liquid Level Control. If voltage is
120 plus or minus 10%, replace motor or motor wiring.
Problem with Liquid Level Control
Board.
Check line voltage first. If AC voltage across load
terminals is not 120 plus or minus 10%, replace the
Liquid Level Control Board.
Water pressure from water source is
not high enough.
Verify water pressure leading into pump inlet is 40 psi
minimum with pump running.
Pump will not run but
tank appears to be
always full.
Common Lead (Green) shorted out to
Red wire (High Probe)
Verify Green and Red wires are not touching.
Pump will not run but
tank level appears to
be below start level.
Common Lead (Green) shorted out to
Black wire (Low Probe)
Verify Green and Black wires are not touching.
Pump motor does not
shut off.
Problem with Liquid Level Control
Board
Short the "H & L" terminals on the Liquid Level Control
Board. If motor does not shut off, replace Liquid Level
Control Board.
Probe Harness Connection may be
open.
Verify connections are good or replace the wiring
harness.
Water may not be reaching top probe
in carb tank.
Verify tank is not filled with CO2 or air by pulling relief
valve up and letting air escape until water begins
coming out.
High Lead (Red) open or not
connected.
Verify Red lead wire is connected from tank to unit.
Common lead (Green) open or not
connected.
Verify Green lead wire is connected from tank to unit.
Problem with probe or probe harness.
Check motor and motor wires by removing red and
black wires from the Liquid Level Control Board. If
okay, short "H & L" terminal on Liquid Level Control
Board. If motor stays off, verify probes and bend
straight or replace. Verify with meter.
Problem with motor or motor wiring.
Measure AC voltage across load terminals on Liquid
Level Control Board. If line voltage is 120 plus or
minus 10% replace motor or motor wiring.
Pump motor does not
pump.
Pump motor
intermittent
57
TROUBLESHOOTING
PUMP
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
Pump motor intermittent
Problem with Liquid Level Control
Board.
Check line voltage first. If AC voltage across
load terminals on Liquid Level Control Board is
not 120 plus or minus 10%, replace the Liquid
Level Contorl board.
Pump motor starts and
stops, short cycles, as soon
as water level drops below
Red (High) probe.
Black (Low) Lead wire is open or
disconnected.
Verify connections and continuity of black wire
from Liquid Level Control Board to Probes on
Carb Tank.
Pump motor starts and
stops, short cycles, as soon
as water level drops below
Black (Low) probe.
Red and Black Leads are switched with
each other.
Verify Red Lead is going to Red probe and
Black Lead is going to Black probe.
Pump short cycles from
below high probe to just
above high probe - Low
probe has no effect.
Red and Green Leads are switched with
each other.
Verify Red Lead is going to Red Probe and
Green Lead is going to Ground Screw on tank
Black and Green Leads are switched
with each other.
Verify Black Lead is going to Black Probe and
Green Lead is going to Ground Screw on tank.
DRINKS
CONDITION
Warm drinks
INVESTIGATION
Is the compressor
running? No
CHECK
CORRECTION
Power switch off or
Compressor switch off
Move switch to "on" position
Ice bank control
Check / replace control box
Compressor overload
Check / replace overload
Start relay
Check / replace relay
Compressor
Check / replace compressor
Note A: It is important to remember that anytime the refrigeration system is opened the refrigerant
should be recovered, a new drier installed and the proper charge of refrigerant weighed into the
refrigeration system.
No water, syrup or gas Is there power to the
dispensing
unit?
58
No power
Plug in unit or reset breaker
Power to control box
Replace fuse or control box
Is power coming
throught the key
switch?
Key switch "off"
Turn switch "on"
Key switch defective
Replace key switch
Is there power to the
key switch?
No power through the
transformer
Reset/replace transformer
Installation and Service Manual
TROUBLESHOOTING
DRINKS
CONDITION
Water only dispensing
Syrup and CO2 only
dispensing
INVESTIGATION
No pressure
Carbonator
CHECK
CORRECTION
Regulator(s) out of
adjustment
Check/adjust regulator(s)
Out of CO2
Install fresh tank
Defective regulator(s)
Check/repair/replace regulator(s)
CO2 line pinched, kinked or
obstructed
Check/repair/replace CO2 line
No power
Check power supply. Plug in
carbonator or reset breaker.
Water supply
Make sure water is turned "on"
Replace water filter
Check/clean/replace pump strainer
Check/clean/repair water check
valve
Check for frozen water line.
Internal Carbonator unit only.
Syrup and plain water
only dispensing
One valve will not
dispense anything
Beverage dispensed
is too sweet
No pressure
Is there power to the
valve?
Is the ratio (brix) of
the drink correct?
Defective carbonator
Check/repair/replace carbonator
pump, motor, electrode or liquid
level control.
Out of CO2
Install fresh tank
HP regulator out of
adjustment
Adjust HP regulator to the proper
setting
Defective HP regulator
Check/repair/replace HP regulator
CO2 line pinched, kinked or
obstructed
Check/repair/replaceCO2 line
Broken wire or loose
connection
Replace/repair wire or connector
Bad microswitch
Replace microswitch
Flow control out of
adjustment
Adjust the flow control
Insufficient soda flow due to Adjust CO2 pressure or change the
low carbonator pressure
tank
Beverage is not sweet
enough
Drinks are foaming
Is the ratio (brix) of
the drink correct?
Are system
pressures correct?
Low CO2 pressure due to
leaks
Repair CO2 leaks
Obstruction in the water or
soda line
Clean out the lines
Flow control out of
adjustment
Adjust the flow control
Soda flow too high
Reset CO2 pressure or replace
regulator if necessary
Obstruction in syrup line
Clean out the syrup line
Over carbonation
Check CO2 supply. Reset
pressure or replace regulator if
necessary
Dirty lines/valves
Clean/sanitize entire system
59
Installation and Service Manual
TROUBLESHOOTING
LIQUID LEVEL CONTROL
START
Does
Pump
motor
come on?
Yes
No
Remove red
and black
wires from
LLC.
Yes
Is pump
motor
operation
intermittent
?
No
Black and/or red probe
shorted. Remove
probes, straighten or
replace if necessary.
Yes
Does
pump
motor
come
on?
Short H and
C terminals
on LLC.
No
Measure AC
voltage
across load
terminals on
LLC.
Does
the
pump
motor
shut
off?
No
Check pump
motor and
wiring.
Yes
Is line
voltage
(– 10%)
present
?
No
Replace
LLC
END
Yes
Check probe
harness, harness
connections and
water supply.
Installation and Service Manual
INDEX
B
F
O
T
Back Room Package ............... 25
brixing ....................................... 2
FOREWORD .............................. 2
Operation .................................. 6
TROUBLESHOOTING
57, 58, 59, 60
H
P
health department ................... 38
Power outlet ............................. 8
I
Q
C
Carbon Dioxide ......................... 6
CAUTION .............. 9, 28, 31, 39
claims ...................................... 23
Cleaning .................................... 2
CO2 ........................................... 7
CO2 monitors ............................ 7
D
U
INSPECTION .............................. 2 Qualified Service Personnel ..... 6
INSTALLATION
8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 R
Installation Date ........................ 2
Instructions ............................. 38 regulations .............................. 38
irregularities .............................. 2 Relocation ................................. 6
return procedures .................... 2
damage .............................. 2, 23
delivery .............................. 2, 23 L
Diagrams
42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56 location ..................................... 8
dispensing valves .................. 38
distributor .................................. 2 M
Drain .......................................... 8
MBE ........................................... 2
ducts ......................................... 8
Model Number ........................... 2
modifications ............................. 6
E
Monthly Cleaning .................... 39
exterior ................................... 38
S
SAFETY ............................... 6, 7
sanitizing ................................... 7
Serial Number ........................... 2
service assistance ................... 2
Service Personnel .................... 6
Shipping .................................... 6
Shipping, Storage, Relocation .. 6
soapy water ........................... 39
solvents .................................. 39
start-up ..................................... 6
Storage ..................................... 6
Unit Inspection ........................ 23
UNPACKING .............................. 2
W
Warning .................................... 6
WARRANTY INFORMATION ..... 2
Water line .................................. 8
water-to-syrup ratio. See
brixing
Wiring Diagrams
48, 49, 50, 52, 53, 55, 56
Manitowoc Beverage Equipment
2100 Future Drive Š Sellersburg, IN 47172-1868
Tel: 812.246.7000, 800.367.4233 Š Fax: 812.246.9922
www.manitowocbeverage.com
In accordance with our policy of continuous product development and
improvement, this information is subject to change at any time without notice.
5009448 December 03, 2007 REV5