Vendo MVC 600 Operators Manual

MARS

PARTS AND SERVICE

MANUAL

P/N: 1120425

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2

SAFETY SECTION		MARS TABLE OF CONTENTS	Pages MS-1 - MS-14
A COMMITMENT TO SAFETY.............................................................................			PageMS-2
VENDOR INSTALLATION....................................................................................			Pages MS-3 - MS-6
ELECTRICAL HAZARDS......................................................................................			Pages MS-7 - MS-8
MECHANICAL HAZARDS ....................................................................................			Page MS-9
REFRIGERATION		HAZARDS ..............................................................................	Page MS-10
SUBSTITUTION AND MODIFICATIONS .............................................................			Pages MS-11 - MS-12
CONSUMER SAFETY WARNING........................................................................			Page MS-13
GENERAL INFORMATION:.................................................................................			Pages MG-1 - MG-21
GENERAL INFORMATION...................................................................................			Pages MG-2 - MG-4
INITIAL SET-UP	..................................................................................................		Pages MG-5 - MG-6
LABEL INSTALLATION ........................................................................................			Page MG-7
ALIGNMENT CHECK ...........................................................................................			Page MG-8
VENDOR TEMPERATURE CONTROL SETTING ...............................................			Page MG-9
ELECTRO-MECHANICAL FUNCTIONAL DESCRIPTION...................................			Pages MG-10 - MG-11
REFRIGERATION SYSTEM - FUNCTIONAL DESCRIPTION.............................			Pages MG-12 - MG-13
VENDOR ELECTRONIC CONTROL....................................................................			PagesMG-14
LOADING PRODUCT...........................................................................................			Pages 30 - 31
SETTING PRICES................................................................................................			Page 32
LOCATION OF PRODUCTS IN THE MACHINE ..................................................			Pages 33 - 34
MARS PROGRAMMING ......................................................................................			Pages 35 - 48
MAINTENANCE ...................................................................................................			Pages 49 - 51
REFRIGERATION OPERATION ..........................................................................			Pages 52 - 54
REFRIGERATION PARTS DESCRIPTION..........................................................			Pages 55 - 57
WIRING DIAGRAMS ............................................................................................			Pages 58 - 60
MARS PARTS SECTION .....................................................................................			Pages MP-1 – MP-
READING A PARTS LIST.....................................................................................			Page 63
HARDWARE LIST ................................................................................................			Pages 64 - 65
MAIN DOOR .........................................................................................................			Pages 66 - 69
SELECTION PANEL.............................................................................................			Pages 70 - 71
LOCK ASSEMBLY................................................................................................			Pages 72 - 73
INNER DOOR.......................................................................................................			Pages 74 - 75
CABINET ASSEMBLY..........................................................................................			Pages 76 - 77
BAR MODULE ......................................................................................................			Pages 78 - 79
LEFT HAND BAR MODULE FIFTH ......................................................................			Pages 80 - 81
BAG MODULE......................................................................................................			Pages 82 - 83
UNIVERSAL MODULE - HELIX............................................................................			Pages 84 - 85
REFRIGERATION ASSEMBLY ............................................................................			Pages 86 - 87
ELECTRONIC COMPONENTS ............................................................................			Pages 88 - 89
ELECTRONIC		HARNESSES................................................................................	Pages 90 - 91
OPTIC ASSEMBLY...............................................................................................			Pages 92 - 93
LABELS AND DECALS ........................................................................................			Pages 94
SUGGESTED SPARE PARTS .............................................................................			Pages 95 - 96
TROUBLE SHOOTING ........................................................................................			Page 97
VENDO	WARRANTY...............................................................................................		Pages 99 - 100
TROUBLE SHOOTING GUIDE ...............................................................................			Pages 101 - 104
		3

PARTS, SALES, & SERVICE CENTERS OF VENDO/SANDEN COMPANY .........

Pages 105 - 106

4

SAFETY SECTION

MS-1

A COMMITMENT TO SAFETY

The Vendo Company is committed to safety in every aspect of our product design. Vendo is committed to alerting every user to the possible dangers involved in improper handling or maintenance of our equipment. The servicing of any electrical or mechanical device involves potential hazards, both to those servicing the equipment and to users of the equipment. These hazards can arise because of improper maintenance techniques. The purpose of this manual is to alert everyone servicing Vendo equipment of potentially hazardous areas, and to provide basic safety guidelines for proper maintenance.

This manual contains various warnings that should be carefully read to minimize the risk of personal injury to service personnel. This manual also contains service information to insure that proper methods are followed to avoid damaging the vendor or making it unsafe. It is also important to understand these warnings are not exhaustive. Vendo could not possibly know, evaluate, or advise of all of the conceivable ways in which service might be done. Nor can Vendo predict all of the possible hazardous results. The safety precautions outlined in this manual provide the basis for an effective safety program. Use these precautions, along with the service manual, when installing or servicing the vendor.

We strongly recommend a similar commitment to safety by every servicing organization. Only personnel properly trained in vendor servicing should have access to the interior of the machine. This will minimize the potential hazards that are inherent in electrical and mechanical devices. Vendo has no control over the machine once it leaves the premises. It is the owner or lessor’s responsibility to maintain the vendor in a safe condition. See Section I of this manual for proper installation procedures and refer to the appropriate service manual for recommended maintenance procedures. If you have any questions, please contact the Technical Services Department of the Vendo office nearest you. Refer to the listing at the back of this manual.

SAFETY RULES

•Read the Safety Manual before installation or service.

•Test for proper grounding before installing to reduce the risk of electrical shock and fire.

•Disconnect power cord from wall outlet before servicing or clearing product jams. The vending mechanism can trap and pinch hands.

•Use only fully-trained service technicians for “Power On” servicing.

•Remove any product prior to moving a vendor.

•Use adequate equipment when moving a vendor.

•Always wear eye protection, and protect your hands, face, and body when working near the refrigeration system.

•Use only authorized replacement parts.

•Be aware of inherent dangers in rocking or tipping a vending machine.

MS-2

SECTION I: VENDOR INSTALLATION

A.Vendors are large, bulky machines of significant size and weight. Improper handling can result in injury. When moving a vendor, carefully plan the route to be taken and the people and equipment required to accomplish the task safely.

B.Remove all tape, shipping sealant, and Styrofoam from the vendor. Loosen any shipping devices used to secure interior parts during shipping. Remove the wooden shipping base, attached to the vendor base by the vendor leveling screws. Make certain the leveling screws are in place and functional.

C.Position the vendor three to four inches (7.6 cm to 10.2 cm) from a wellconstructed wall of a building or otherwise on a flat, smooth surface.

IMPORTANT: The vendor requires three inches (7.6 cm) of air space from the wall to ensure proper air circulation to cool the refrigeration unit.

D.Adjust the leveling screws to compensate for any irregularities on the floor surface. Ideally, no adjustment will be necessary and the leveling legs will be flush with the bottom of the vendor. A spirit level is a useful aid to level the vendor. When the vendor is properly leveled, the outer door, when opened, will remain stationary. Vendors must be level to insure proper operation and to maintain stability characteristics. Do not add legs to the vendor.

E.Check the manufacturer’s nameplate on the left side of the vendor outer door to verify the main power supply requirements of the vendor. Be sure the main power supply matches the requirements of the vendor. To ensure safe operation, plug the vendor only into a properly grounded outlet.

DO NOT USE EXTENSION CORDS.

F.Recommended voltage specs = volts required + amps of circuit.

NOTE: Any power supply variance more than + 10% may cause the vendor to malfunction.

*Power outlets must be properly grounded.

*Power outlets must be properly polarized, where applicable.

Test the outlets using the following information. (Refer to Figure 1 on page MS-4.)

MS-3

TYPE 1					STEP 3
LARGE SLOT-LINE 2			STEP 1
NEUTRAL CONTACT (WHITE)				STEP 2
	SMALL SLOT-LINE 1
	LIVE CONTACT (BLACK)
	ROUND SOCKET
	EARTH CONTACT
	(GREEN)
TYPE 2	EARTH CONTACT SLOT			STEP 2	STEP 3
	(GREEN AND YELLOW)
			STEP 1
SLOT	SLOT
	LIVE CONTACT
NEUTRAL CONTACT	(BROWN)
(BLUE)
TYPE 3	POWER CONTACT SOCKET				STEP 3
	NEUTRAL (BLUE)		STEP 1	STEP 2
	OR LIVE (BROWN)
EARTH CONTACT	POWER CONTACT
	SOCKET
(GREEN AND YELLOW)
	NEUTRAL (BLUE)
	OR LIVE (BROWN)
TYPE 4	POWER CONTACT SOCKET
	NEUTRAL (BLUE)				STEP 3
	OR LIVE (BROWN)		STEP 1	STEP 2
EARTH CONTACT	POWER CONTACT
	SOCKET
(GREEN AND YELLOW)
	NEUTRAL (BLUE)
	OR LIVE (BROWN)
TYPE 5	POWER CONTACT SOCKET			STEP 2	STEP 3
	NEUTRAL (BLUE)		STEP 1
	OR LIVE (BROWN)
	EARTH CONTACT SOCKET
	(GREEN AND YELLOW)
POWER CONTACT
NEUTRAL (BLUE)
OR LIVE (BROWN)
FIGURE 1		CHECKING FOR PROPER POLARIZATION
			MS-4

SECTION I: VENDOR INSTALLATION (CONTINUED)

For Type 1 and Type 2 outlets, test for Grounding and Polarization as follows:

1.With a test device (volt meter or test light), connect one probe to the receptacle’s Neutral contact and the other to the Live contact. The test device should show a reaction.

2.Connect one probe to the receptacle’s Earth contact and the other to the Live contact. The test device should show a reaction.

For Type 3 through Type 5 outlets, test for Grounding as follows:

1.With a test device (volt meter or test light), determine which of the receptacle’s power contacts is the Live contact.

A.Connect one probe to the receptacle’s Earth contact.

B.Connect the second probe to the left (or upper), power contact. If a reaction occurs, this is the Live power contact. If a reaction does not occur, move the second probe to the right (or lower), contact. A reaction should occur, indicating that this is the Live power contact.

2.Connect one probe to the receptacle’s Live power contact (as determined in step 1). Connect the second probe to the other power contact (neutral). The test device should show a reaction.

IF THE ABOVE CONDITIONS ARE NOT MET FOR THE GIVEN OUTLET TYPE, CONTACT A LICENSED ELECTRICIAN AND HAVE THE NECESSARY CORRECTIONS MADE.

Ambient temperature operating range for this vendor is +5°F to +113°F

(-15°C to +45°C). The climatic rating of this vendor is “N” (Normal).

MS-5

SECTION I: VENDOR INSTALLATION (CONTINUED)

G.Door Support (Fig. 2)

The door support is to insure that the outer door closes squarely to the cabinet. Raising or lowering the door support can also insure proper alignment of the door latch.

H.	Door Latch Alignment (Fig. 3)
	After any door adjustment, the floating
	Quicker Lock assembly should align
	itself automatically. The latch	FIGURE 2
	assembly is adjustable. To adjust,
	loosen the latch bracket mounting screws,
	and raise or lower the latch assembly into
	position, then tighten the mounting
	screws.	DO NOT INSERT OBJECTS
LATCH
		INTO LOCK CAVITY.
BRACKET
		1
		2
	MOUNTING
	SCREW
		TO FREE OBJECTS, REMOVE
FIGURE 3		LOCK CAP AS SHOWN

WARNING:

KEEP FINGER AND OTHER OBJECTS OUT OF LOCK CAVITY.

NOTE: Refer to the appropriate Parts and Service Manual for detailed instructions, operating principles, and recommended maintenance intervals and procedures.

MS-6

SECTION II: ELECTRICAL HAZARDS

GENERAL

Vendo vending machines are provided with the appropriate power supply setting for your area. All models are equipped with transformers, enabling the vending machine to operate on different main voltages. Refer to page MS-4 for information to determine the main power requirements. Refer to the appropriate Service Manual for details of transformer operations.

The power sources are standard for both household and commercial lighting and appliances. However, careless or improper handling of electrical circuits can result in injury or death. Anyone installing, repairing, loading, opening, or otherwise servicing a vending machine should be alerted to this point. Apply all of the normal precautions observed in handling electrical circuits, such as:

•Refrigeration servicing to be performed by qualified personnel only.

•Unplug the vendor or move power switch to off position before servicing or clearing product jams.

•Replace electrical cords if there is any evidence of fraying or other damage.

•Keep all protective covers and ground wires in place.

•Plug equipment into outlets that are properly polarized, where applicable, and protected with fuses or circuit breakers.

•All electrical connections must be dry and free of moisture before applying power.

A. Grounding Systems

Vendo vending machines are provided with the appropriate service cord for the power supply in your area. The service cord will connect to the matching electrical outlet. Always ensure that the outlet to be used is properly grounded, and polarized where applicable, before plugging in the vendor. (See pages MS-3 - MS-5).

WARNING:

ALWAYS TEST TO VERIFY PROPER GROUNDING PRIOR TO INSTALLATION IN ORDER TO REDUCE THE RISK OF ELECTRICAL SHOCK AND FIRE.

The electrical grounding system also includes the bonding of all metal components within the vendor. This involves a system of bonding wires identified by green or green and yellow marking. The system uses serrated head screws, lock washers, and star washers to insure the electrical connection between parts. Maintenance of vending equipment may involve disassembly. Include the above items when reassembling, even if the vending machine may appear to function normally without them. Omitting any of these items can compromise a link in the grounding system.

MS-7

See the appropriate Service Manual or kit instructions for components and assembly instructions.

SECTION II: ELECTRICAL HAZARDS (CONTINUED)

B.Servicing with “Power Off”

For maximum safety, unplug the service cord from the wall outlet before opening the vendor door. This will remove power from the equipment and avoid electrical and mechanical hazards. Service personnel should remain aware of possible hazards from hot components even though electrical power is off. See the appropriate sections of this manual for further information.

C.Servicing with “Power On”

Some service situations may require access with power on. Power-on servicing should be performed only by fully qualified service technicians. Particular caution is required in servicing assemblies that combine electrical power and mechanical movement. Sudden movement, to escape mechanical action, can result in contact with live circuits and vice versa. It is therefore doubly important to maintain maximum clearances from both moving parts and live circuits when servicing.

WARNING:

“POWER-ON” SERVICING SHOULD BE ACCOMPLISHED ONLY BY FULLY TRAINED PERSONNEL. SUCH SERVICE BY UNQUALIFIED INDIVIDUALS CAN BE DANGEROUS.

Power to lighting system is shut off automatically by the electronic controller when the outer door is opened.

MS-8

SECTION III: MECHANICAL HAZARDS

A.Servicing of Moving Parts and Assemblies

When servicing assemblies involving moving parts, use extreme caution!! Keep fingers, hands, loose clothing, hair, tools, or any foreign material clear of entrapment.

As noted before under the Electrical Hazards section, “Power On” servicing should only be performed by qualified personnel. Refer to and heed the warnings noted in Electrical Hazards section. These warnings refer to the potential hazards associated with electrical power and moving parts. Always maintain maximum clearances from electrical and moving parts.

Always reinstall protective covers and guards when reassembling equipment.

WARNING:

THIS VENDING MACHINE INCLUDES MECHANICAL EQUIPMENT WHICH CAN BE HAZARDOUS IF IMPROPERLY HANDLED OR SERVICED. USE CAUTION AND CONSULT THE VENDO SAFETY MANUAL AND THE VENDO SERVICE MANUAL FOR ADDITIONAL SAFETY INFORMATION.

	WARNING		WARNING
	RISK OF ENTRAPMENT	!	RISK OF SHOCK	!
			ELECTRICAL	!

MS-9

SECTION IV: REFRIGERATION HAZARDS

GENERAL

Refrigeration systems involve both electrical power and mechanical action. These systems may present any of the potential dangers shown in the sections on Electrical and Mechanical Hazards contained in this manual.

A.Compressed Refrigerant

Refrigeration systems involve the compression and evaporation of gases.

The pressures contained represent a potential hazard if suddenly released in confined areas. Caution is required when performing maintenance tests or repairs. All testing of sealed refrigeration systems should be done by trained personnel who are familiar with the systems and pressures involved.

B.Physical Protection

The accidental release of refrigerant gases can result in physical injuries.

Always wear protective glasses and protect your hands, face, and body when working near the refrigeration system.

WARNING:

ALWAYS WEAR EYE PROTECTION AND PROTECT YOUR HANDS, FACE, AND BODY WHEN WORKING NEAR THE REFRIGERATION SYSTEM.

SECTION V: TEMPERATURE HAZARDS

GENERAL

Maintenance personnel should be alert to the potential hazards from hot metal surfaces. High temperatures may be present throughout the refrigeration system although electrical power has been removed.

MS-10

SECTION VI: SUBSTITUTIONS AND MODIFICATIONS

GENERAL

Unauthorized changes, or the substitution of unauthorized parts, can compromise the equipment designs. This can result in unsafe conditions for either the service personnel or the equipment users. Always refer to the appropriate Parts and

Service Manual for replacement parts and maintenance instructions. If questions arise, contact the Technical Services Department of the Vendo office in your area. (See pages 105 and 106.)

When servicing the vending machine, always reassemble all components to their original location and position. Maintain the correct routing for tubing, electrical wiring, etc. Replace all clamps, brackets, and guides to their original locations. Replace all tubing, sleeving, insulating material, and protective covers to their original condition.

WARNING:

VENDO EQUIPMENT HAS BEEN PROVIDED WITH APPROPRIATE PROTECTIVE DEVICES TO PROTECT AGAINST THE POSSIBILITY OF OVERHEATING AND FIRE, AS A RESULT OF EQUIPMENT OR COMPONENT FAILURES. SUBSTITUTION, MODIFICATION, OR BYPASSING OF SUCH PROTECTIVE DEVICES CAN CREATE DANGEROUS CONDITIONS. PROTECTIVE CIRCUITS SHOULD NEVER BE BYPASSED, AND FAILED PROTECTIVE DEVICES MUST BE REPLACED ONLY WITH FACTORY-AUTHORIZED PARTS.

A.Service Cord Replacement

Vendo vending machines are furnished with unique power supply cords. If replacement becomes necessary, consult the Parts Section and order the correct replacement cord for the model of vending machine in question. Do not use substitute replacement cords. Only authorized service personnel with appropriate training should replace the vending machine service cord. If a question should arise concerning which service cord to order, contact the Technical Services Department of the Vendo office in your area for assistance.

MS-11

SECTION VI: SUBSTITUTIONS AND MODIFICATIONS (CONT’D)

WARNING:

THIS APPLIANCE MUST BE EARTHED

IMPORTANT

The wires in the mains leads are colored in accordance with the following code:

110/120	220/240
Green	Green and Yellow ............................	Earth
White	Blue ..................................................	Neutral
Black	Brown ...............................................	Live

MS-12

SECTION VII: CONSUMER SAFETY WARNING

WARNING:

VENDOR CAN BE OVERTURNED IF SUFFICIENT FORCE IS APPLIED, AND MAY RESULT IN SERIOUS INJURY OR DEATH.

GENERAL

There have been incidents, including fatalities, when vending machines have been vandalized by being pulled over in an attempt to obtain free product or money.

To warn of the danger involved in tipping, shaking, or rocking the vending machine, a decal has been designed to be affixed to vending machines. (One such decal is supplied with the vending machine.) Vendo will supply sufficient decals to be placed on all machines, on request. Should you require additional information, contact a service representative. See parts, sales and service centers listed on page 105 and 106.

THE FOLLOWING DECAL SHOULD BE PLACED IN A POSITION ON THE VENDOR CONTROL PANEL AT EYE LEVEL.

WARNING

Never rock or tilt. Machine can fall over and cause serious injury or death.

Vending machine will not dispense free product.

389611A

ENGLISH

MISE EN

GARDE

Ne jamais secouer ou incliner.

Le distributeur peut se renverser et causer

des blessures graves

ou la morte. Cette machine ne

distribue pas de produits gratuitement.

389611-1A

FRENCH

MS-13

AVISO

Nunca voltie o incline esta maquina.

Puede caer sobre usted y cauzarle heridas graves o matarle.

Esta Vendomatica no provee producto gratis.

389611-2A

SPANISH

GENERAL INFORMATION

MG-1

GENERAL INFORMATION

This manual contains programming, operation, and complete parts and electrical wiring diagrams.

The Mars controller has a microprocessor which will permit pricing per selection from

0.00 to 99.99. This machine also has space-to-sales programming.

Specifications:

MODEL			MARS
SELECTIONS				10
DIMENSIONS (HEIGHT X WIDTH X DEPTH)
CURVED DOOR		72” x 39“ x 30”
VENDING PRODUCT CAPACITY:
BAR MODULE:	BAG MODULE:				UNIVERSAL MODULE:
46 BARS PER COL.	39 BAGS PER COL.				21 PRODUCTS PER
4 COL. PER MODULE	3 COL. PER MODULE				COL.
TOTAL: 184 BARS PER	TOTAL: 117 BAGS PER				3 COL. PER MODULE
MODULE	MODULE				TOTAL: 63 PRODUCTS
					PER MODULE
SHIPPING WEIGHT		685 POUNDS
OPERATION VOLTAGE	115v 60 Hz.		220v 50 Hz			240v 50Hz
	(U.S.)		(Int’l)			(UK, Australia)
AMP. RATING				10
REFRIGERATION	115v 60Hz.		220v 50 Hz			240v 50Hz
VOLTAGE	(U.S.)		(Int’l)			(UK, Australia)

*Dimensions and shipping weight will vary slightly due to manufacturing tolerances, shipping boards, and whether or not coinage is installed.

MG-2

INITIAL SET-UP

A.UNPACKING

Remove all plastic film, cardboard, and tape from the outside of the vendor. Loosen any shipping devices used to secure interior parts during shipment.

To remove shipping boards from base, raise vendor on a well-stabilized lifting device. Remove the leveling bolts that hold the boards in place and remove the boards. Replace bolts to equal heights in the threaded holes.

Another method to remove shipping boards is to split the boards apart. Using a pinch bar, or a heavy screwdriver and hammer, insert tool into the slots and force the board apart.

B.POSITIONING AND LEVELING

IMPORTANT: PLACE THE VENDOR (IN DESIRED LOCATION) AT LEAST

3 TO 4 INCHES AWAY FROM ANY REAR OBSTRUCTION. This is for proper air flow through the refrigeration compartment. The system requires front to rear air circulation for proper operation. Level vendor with leveling bolts. Be sure all four leveling bolts are supporting the machine.

C.POWER SUPPLY CONNECTION

CAUTION: DO NOT USE AN EXTENSION CORD!

The vendor’s power requirements will vary depending upon the country it was purchased for. To verify the power requirements of the vendor, check the serial plate located on the hinge side of the door (see Figure 4 on page MG- 6). The power requirements are listed on the serial plate.

To insure safe operation of the vendor, the vendor’s power supply must be a properly grounded and polarized outlet. Be fore plugging the vendor into the outlet, test the outlet to confirm it will meet the vendor’s power requirements. If the power supply of the outlet is different from the power requirements of the vendor, different settings on the transformer may be necessary.

If the power requirements are not properly met, contact a licensed electrician and have the necessary corrections made.

Should you require additional information, contact a service representative.

See the Parts, Sales and Service Centers listed on pages MP-34 and MP-35.

MG-3

INTRODUCTION AND MODEL IDENTIFICATION

	Example:
MODEL	APPROVED FOR OUTDOOR USE
				BASIC
SERIAL NO.				UNIT
	Lot Code: YYMMDD			LR 13085
CHARGE	OZ. R-134a			AMPS
MIN. TEST PRESSURE APPLIED - PSI			R	115v	VOLT
LOW SIDE 140	HIGH SIDE 235
endo R			239L	50/60	CYCLE
		FRESNO, CA.	VENDING MACHINE	1	PHASE
THE VENDO COMPANY			REFRIGERATED
				POWER REQUIREMENTS

FIGURE 4

NOTE: The Model number of the vending machine is located on the top, left hand corner of the serial plate. Do Not use the “BASIC UNIT” number. The BASIC number is the cabinet size, which is used on a number of different machines. A typical model number could read

“786502004”. 786 is the model number, and 004 tells what options are included.

LABEL INSTALLATION

MG-4

FLAVOR LABELS: Flavor labels are installed from inside the outer door. Open the vendor door and swing the inner door away to gain access to the reverse side of the control panel. Open the coinage door. The flavor labels slide into carrier clips on the back of each flavor window (Figure 5).

NOTE: Make sure the correct flavor label has been installed for each selection. This vendor can be programmed to link selection buttons to vend modules in a variety of different configurations. Refer to the section on electronic control programming for details on the vendor selection set-up.

Figure 5

MG-5

COMPRESSOR

DRAIN TUBE

PAN

FAN BRACKET

Figure 6

Figure 7

ALIGNMENT CHECKS

DOOR RAMP CHECK:

The door support is to ensure that the outer door closes squarely to the cabinet. Raising or lowering the door will help ensure the proper alignment of the door lock stud and the cabinet latch (see Figure 6).

REFRIGERATION AREA CHECK:

Check the position of the condensation pan (see Figure 7). The correct position of the condensation pan is between the compressor and the condenser fan bracket.

Be sure the drain tube is clipped to the pan and free of kinks. The trap prevents warm air from reaching the evaporator area.

VENDOR TEMPERATURE CONTROL SETTING

The cabinet temperature is regulated by the temperature control, located on the left side of the evaporator. Before adjusting the control, be sure the refrigeration system

MG-6

is working properly. Check that the condenser and evaporator fans run freely and do not make excessive noise, which might indicate an obstruction to the fan blade. The evaporator and condenser grills should be free from debris. In addition, check the condition of the door gasket, to ensure a proper seal on the cabinet.

When the air temperature at the feeler bulb reaches 65°F (18°C), the refrigeration system should cycle on. To lower the cabinet temperature, turn the temperature control adjustment screw CLOCKWISE. To raise the cabinet temperature, turn the adjustment screw COUNTER-CLOCKWISE. The cabinet temperature will change 6 degrees for every 1/4 turn of the adjustment screw (Figure 8).

To ensure correct temperature control operation, it is essential that the control feeler bulb be positioned in the air flow from the evaporator, and not resting against any metal surfaces (other than the retaining clip), which will give a misleading reading to the control. This feeler bulb should not require adjustment unless the refrigeration system has been removed for servicing (Figure 9).

COL

D

E

R

TEMPERATURE

CONTROL

Figure 8

CAPILLARY

TUBE

CLIP

TEMPERATURE

CONTROL

Figure 9

ELECTRO-MECHANICAL FUNCTION DESCRIPTION

VEND MODULE CONFIGURATION AND OPERATION:

The Mars Vendo Confectionery vendor is specially designed to dispense chilled bartype and bag-type products, as specified by Mars. The vendor cabinet is divided

MG-7

into two compartments; the lower portion is open to the ambient environment, and houses the majority of the refrigeration system components. The remainder of the cabinet is refrigerated to preserve the vended product.

The vended product, in bar, bag, or combo form, is dispensed from vend modules mounted in the refrigerated cabinet. There are spaces for up to five vend modules in

the cabinet. The use of five modules however, requires a full 180° swing of the outer door. The modules will always be one of four varieties:

A)Right-Hand Bar Module

B)Left-Hand Bar Module

C)Bag Module

D)Universal Module

There are two types of bar modules because of the way these modules are loaded. Bar product is loaded into only one side of the module as it is pulled out for loading.

Therefore, a right-hand bar module is always installed in the first position at the right side of the cabinet, so that full access to the module chambers is available. The lefthand bar modules can be situated in any of the remaining positions in the cabinet.

The bag modules, on the other hand, are loaded from both sides when pulled out for loading. Therefore, there is only one ve rsion of the bag module. Due to the requirement for access to both sides of the module during loading, these modules can only be installed in the three center positions.

The universal module is a right-hand module and therefore can only reside in the first position at the right side of the cabinet.

Each vend module consists of a steel housing with compartments, or columns, segregated by steel partitions. On bar modules, there will always be four chambers, or columns, per module. On bag modules (including universal modules), however, due to the larger size of bag product, there are only three chambers, or columns, per module. Each module chamber, or column, has a full-height access door. Bar modules have one door per column; bag modules have two doors per column--one on either side of the module for each column. The universal module has one steel door over all three columns. In each case, these doors keep the product in place within each column of the module. Each module is hung from a support channel

ELECTRO-MECHANICAL FUNCTION DESCRIPTION (CONTINUED)

mounted to the cabinet ceiling, and suspended between a pair of sliding rails, which allows the module to be pulled forward for loading.

The product is stored and dispensed by a motor-driven plastic product helix, except in the case of the universal module, where the helix is a powder-coated wire helix. The bar product helix, bag product helix, and universal product helix are different part

MG-8

numbers, as both the diameter and pitch are different. The helix, in the case of the bar and bag, is driven by the same part number vend motor. The universal helix is driven by its own motor that is different from the bag and bar motors. The vend motors are mounted to a steel support channel at the top of each module, and are connected by a module harness to the cabinet harness. The vend motors are connected to the electronic controller in such a way that any combination of vend motors can be assigned to an individual selection button. This feature allows space- to-sales programming of the vendor’s column to the selection buttons to maximize the use of space for prime product versus slower-moving products.

PRODUCT LOADING:

As described, there are three types of vend modules: Bar modules, Bag modules, and Universal modules. Each has a unique loading process.

For BAR MODULES, products can only be loaded from one side of the module. The desired module is pulled to the limit of its slides, allowing access to all columns in the module. The door on the desired column is swung open. Product to be loaded is slid onto the flights of the product helix, END FIRST, on either side of the helix stem.

Also, place the bar into the helix UPSIDE DOWN. For first-in-first-out sales, it is important that the new product be put into the top of the helix, until no flights are left open. Once full, the door on that column can be closed. The door is held closed by a magnetic strip on the door edge. The remaining bar columns in that module can be loaded in a similar fashion. Once finished, the module is pushed back into the cabinet, until the slides stop further motion.

For BAG MODULES, the process is identical to that for bar modules, except that vended product is loaded SIDEWAYS on either side of the helix, with both doors open on that column. Also, place the bag into the helix UPSIDE DOWN. The same first-in-first-out rules apply to bag modules. Product should lie as flat as possible in the helix. Avoid wadding up bags as they are set into the helix, as they could cause vend problems.

THE VEND CYCLE:

In order to initiate a vend, the customer must first set up a credit. A credit is registered by inserting coins into the coin slot (and into the coin mechanism), by inserting a bill into the bill validator, (if available), or by inserting a debit card into the debit-card reader, (if available). Once a credit is established equal to or in

ELECTRO-MECHANICAL FUNCTION DESCRIPTION (CONTINUED)

excess of the lowest product price, the customer is allowed to make a selection. By pressing the selection button of their choice, a signal is sent to the electronic controller, which, in turn, feeds power to the vendor column(s) assigned to that selection.

Product is vended when a vend motor assigned to that selection is energized by a circuit from the electronic controller. The motor rotates its product helix, and drops

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the bottom product out of the bottom of the helix. The product falls freely onto the product chute.

As the product passes down the product chute, it passes through the vend detection system, where optical sensors detect the passage of the product on its way to the product hopper. The passage of product through the vend detection sensors signals the electronic controller, which then performs a variety of functions. The vended product ends up in the product hopper and is removed by the customer as they push open the vend door. (See pages MG-17 - MM3 for further electronic controller details.)

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REFRIGERATION SYSTEM - FUNCTION DESCRIPTION

BASIC REFRIGERATION PRINCIPLES:

A refrigeration system is principally involved in the process of transferring heat. Heat is removed from the vending product area of the cabinet and transferred to the condenser, where it is dissipated. With vending equipment, large quantities of heat must be transferred economically and efficiently in a continuous fashion, without loss of refrigeration gas, over a long period of time. The most common type of refrigeration system in vending is the vapor compression, or simple compression, cycle system. This system consists primarily of three elements: A compressor, an evaporator, and a condenser, joined together as a “sealed system”.

In the vapor compression system, there are two pressures present: Low, evaporating pressure and high, condensing pressure. The refrigerant gas acts as the transport medium in which heat is transferred from the evaporator to the condenser, where heat is dissipated into ambient air. A change of state occurs as the refrigerant changes from liquid to vapor and back to liquid again, allowing the refrigerant to absorb and discharge large quantities of heat in an efficient manner.

The basic vapor compression cycle occurs as follows: In the evaporator, the refrigerant boils (evaporates to vapor), at a temperature sufficiently low enough to absorb heat from the cabinet space being cooled. The boiling temperature is controlled by the pressure maintained in the evaporator. The higher the pressure, the higher the boiling point. The compressor removes the vapor via suction lines from the evaporator at a rate sufficiently rapid to help maintain the desired pressure. The compressor takes the low pressure vapor and compresses it, increasing both the pressure and temperature of the vapor. This hot, high-pressure gas is forced out of the compressor discharge valve and into the condenser. Upon reaching the condenser, the refrigerant dissipates its heat and condenses into liquid. This liquid, in turn, flows from the condenser back to the evaporator to repeat the cycle.

VENDO REFRIGERATION SYSTEM OPERATION:

The general cycle described above occurs within the refrigeration system fitted in

Vendo equipment. A more detailed explanation of the function of the various components in the system follows.

As the temperature within the cabinet increases, the liquid contained in the temperature control feeler bulb also rises in temperature and, in doing so, expands. This expansion increases the pressure against the temperature control bellows, and actuates the temperature control switch. This switch directs power to the compressor and condenser fan motor. The compressor pulls low pressure refrigerant vapor from the evaporator and compresses it, increasing both its temperature and pressure. This high-temperature / pressure vapor is expelled to the condenser, where the vapor sheds its excess heat, as drawn off by the air flow created by the condenser fan through the condenser fins. More specifically, the

REFRIGERATION SYSTEM - FUNCTIONAL DESCRIPTION (CONTINUED)

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condenser fan pulls air through the condenser, removing heat from the refrigerant vapor in the condenser coils.

The cooled gas in the condenser turns to liquid, which is pumped via pressure from the compressor through the drier, which removes any water and particles from the liquid refrigerant. This liquid is then forced through the small diameter capillary tube, which acts like a throttle for the system, controlling the flow rate of the liquid refrigerant into the evaporator. Air flow is circulated throughout the cabinet by the evaporator fan, which pulls air flow through the coils and fins of the evaporator. Any excess heat present in the air flow is drawn off by the liquid refrigerant, which evaporates, and is, in turn, pulled via the compressor. The falling temperature in the cabinet eventually cools the liquid in the temperature control feeler bulb, condensing the liquid inside and reducing its pressure, which releases the pressure against the temperature control bellows. This reduction deactuates the switch inside, cutting off power to the compressor and condenser fan motor.

HEATING SYSTEM - FUNCTION DESCRIPTION

VENDO HEATING SYSTEM OPERATION:

The MVC-600 is also equipped with a heating element for cold weather environments. This system consists of a simple 150W, 230V or 115V heating element located just behind the evaporator fan air ducting. This unit is controlled by its own thermostat and is activated when temperatures are in danger of freezing the product.

CAUTION: The heating element can cause minor burns to your hands and fingers if touched when the element has been energized for any length of time.

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VENDOR ELECTRONIC CONTROLLER

DESCRIPTION:

The Mars Vendo Confectionery machine comes equipped with an integral electronic control system which manages the vendor’s mechanical functions, monitors the vend system for failures, controls the vendor’s coin mechanism, drives the vendor’s scrolling display, and keeps track of sales data, among other functions. The control system consists of the following major components:

•Electronic Control PC Board

•Harnessing

•Scrolling Display

•Transformer

•Reset Switch

•Vend Detection System

•Coin Mechanism

These components work together to jointly control the vendor’s functions. The control system is programmed with the following capabilities:

•Space-to-Sales Programming

•Sales Data Storage

•Data Retrieval via DEX/UCS Plug or Optical Datalink

•Self-Diagnostics for the Vend Mechanism

•Multi-Pricing

•Multi-Vend

•Multi-Lingual and Personal-Message Display Programming

In order to begin programming the electronic controller, it is necessary to understand the purpose and location of each of the major components listed above.

Electronic Control PC Board: Located on the outer door, inside a protective housing, the electronic controller is the heart of the vendor control system. This board contains all the microprocessors, memory microchips, and other electronic devices needed to control the functions of the vendor. Also located on the PC board is a small push button switch, the mode switch, whose purpose is explained in the electronic controller programming section that follows. This switch is accessible through a grommeted hole in the electronic controller housing cover.

Harnessing: Connected to the electronic control PC board is a series of harnesses that supply power to the control board, and distribute power to the various systems within the vendor. The harnesses are all keyed in such a way that they cannot be installed on the wrong set of pins, or misconnected on their correct PC-board pins,

(refer to the Electrical Servicing section for harness connection detail).

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