Download FIELD SERVICE MANUAL CONVEYOR OVEN MODEL

Foodservice Equipment Specialists
P.O. Box 880 Saco, ME. / U.S.A. 04072
877-854-8006 * FAX (207) 283-8080
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
Page 1 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
UNCRATNG AND INSPECTION
PAGE 2
ASSEMBLY AND INSTALLATION
PAGE 2
ELECTRICAL INSTALLATION
PAGE 2
OPERATIONAL SEQUENCE
PAGE 3
TROUBLESHOOTING GUIDE
PAGE 4, 5, 6, 7, 8
DRIVE SYSTEM COMPONENTS
PAGE 9, 10
DIGITAL DISPLAY CONTROL
PAGE 11
WIRE DIAGRAMS
PAGE 12, 13, 14
HEATER ELEMENTS
PAGE15
PARTS BREAK DOWN
PAGE 15
EXPLODED VIEWS
PAGE 16
Page 2 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
UNCRATING AND INSPECTION
Unpack the unit and components from the shipping container. Remove all visible packing
materials including those that may be inside the baking chamber. If damage is discovered, file a
claim immediately with the carrier that handled the shipment.
ASSEMBLY AND INSTALLATION
The equipment is shipped fully assembled and ready to plug into a matching outlet specified for
its specific voltage and amperage rating. Removal or replacement of the power cord and plug
will VOID the warranty. For assistance, contact the Belleco, Inc. Service Team at 1-877-8548006. Please refer to the appropriate schematic at the rear of this manual for plug
configurations. Consult with a licensed electrician prior to installation. Do not operate this
equipment without the crumb trays properly installed as this may cause overheating and loss of
productivity.
CAUTION – During installation: Do not place on surfaces or near walls, partitions or
kitchen furniture and the like – unless they are made of non-combustible material or clad
with non-combustible heat-insulating material, and pay attention to fire prevention
regulations.
CAUTION – To reduce the risk of fire, the appliance is to be installed in non-combustible
surroundings only, with no combustible material within 18 inches of the sides, front, or
rear of the appliance or within 40 inches above the appliance. Food may burn. Therefore
equipment must not be used near or below curtains and other combustible materials.
They must be watched.
ELECTRICAL INSTALLATION
WARNING – Disconnect the unit from its power source before installing or removing any
parts.
WARNING – Check with your local power company or licensed electrician before
installation to determine the actual voltage at the outlet. For a unit rated 208 volts, never
plug it into 240 volts as serious overheating and damage could occur. For a unit rated
240 volts, never plug it into 208 volts as the lower voltage will greatly reduce the
productivity of the unit.
WARNING – NEVER operate any piece of equipment without proper GROUND
connection. Improper grounding may result in serious personal injury or could be fatal!
Page 3 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
OPERATIONAL SEQUENCING:
POWER SUPPLY: Power is supplied to the oven through a 10 gauge cord with a 6-30P
plug. Depending on voltage of oven ordered, power supply is to be either 208 or 240
volts single phase at the outlet.
MAIN POWER: Toggle located at the rear of the unit. When in the ON position the main
relay is energized. Power is supplied through a 30 AMP fuse to the A/C transformer and
the DC power supply.
AUTO COOING FEATURE: Power is permanently supplied to the normally open
thermostat (fan switch). When temperatures reach 120ºF +/- 3ºF (48.9ºC +/- 3º C) the
switch closes energizing the cooling fans. The switch will open when the control box
temperature is reduced to 90ºF +/- 3ºF (32.2ºC +/- 3ºC) interrupting power to the cooling
fans.
OVER TEMP (HI-LIMIT/RESET): In the event of an over heat situation causing the
temperature in the control box to exceed 190ºF +/- 3ºF (87.7ºC +/- 3ºC) the hilimit/reset switch will open interrupting power to the heat and drive systems. Once the
unit has cooled down the hi-limit/reset may be manually reset energizing the controls.
HEAT CIRCUIT RELAYS: The four heat relay coils are energized through connection
J13 on the on the digital control panel.
CONVEYOR DRIVE CURCUIT: The DPDT relay for the drive motor is energized when
the Soft Power Button on the control panel is pressed.
DIGITAL DISPLAY- TEMP/SPEED CONTROLLER: The digital display controller
receives 24 VAC power at board connection J38 from the A/C transformer when the
Soft Power Switch is in the ON position.
Page 4 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
MGD-18 Troubleshooting Guide
Symptom
Oven will not turn on, display is blank
Cause
No power at outlet.
Master On/Off switch at rear of
unit in the Off position.
30 amp fuse is blown.
Display shows Probe Alarm
(prb1, prb2, prb3, prb4).
Control emits a continuous beep
Temperature probe in zone is
not responding.
One heat zone will not turn on
Possible burned out heater tube
in zone.
Loose connection at terminal
block (see wire diagram).
Loose connection at heat relay
or defective relay
One heat zone may not be on.
Supplied voltage to oven may
be too low (i.e. 240 volt oven
running on 208 volts).
Display will not change from
WARMING to REDY
Display changes from WARMING to
HEATING and does not read REDY
Conveyor will not reverse direction
Conveyor speed will not change
Conveyor will not turn, heat works
Temperature threshold has
been reached.
Obstruction in conveyor belt.
Speed button has not been
pressed.
Relay for drive system is not
engaging.
Set button not pressed after
setting new speed.
Driver board defective.
Obstruction in conveyor belt.
No power to speed board from
control.
No voltage signal to driver
board or drive motor.
Drive motor defective.
Solution
Verify voltage at outlet.
Check breaker in wall panel to make sure it is not tripped.
Put Master On/Off in the ON position.
Check for broken element and Identify potential short to
ground. Replace fuse after issue is resolved.
Press any key to turn off the beep.
Check for loose connections to probes at terminal block and
control board.
Examine all heater tubes in heat zone. Check for physically
broken heater tube or burned coil inside glass covering.
Inspect connections at terminal block and heat relays.
If possible swap heat relay with a working relay to see if
heat comes on. If heat comes on replace defective relay.
Examine heat zones to be sure all elements are working.
Factory default temperatures are set at 350° (F).
Verify voltage at the outlet. Supplied voltage must match
rating on data label.
Reduce zone temperatures to allow the elements to cycle.
If zone temperatures are set above 455° (F) the oven
changes to heating mode as the elements are now at full
intensity and will not cycle on and off.
Due to airflow and heat zones most products can be cooked
at lower temperatures.
Check for and clear obstructions in conveyor belt.
Press and hold speed button until unit beeps once then
release button. Conveyor will stop and after approximately
10 seconds conveyor will reverse direction.
Replace relay.
Once new conveyor speed has been entered press the set
key to save changes.
Verify signal to the driver board and replace board if
necessary (see troubleshooting on page 6).
Check for and clear any obstructions in conveyor belt.
Verify there is 24 volts AC from controller to speed board.
Verify voltage signal from speed board to driver board.
Verify DC voltage to drive motor from drive board.
Check 1 amp fuse at rear of oven to make sure it is not
blown.
Check DC power supply to make sure it is providing 24
VDC to drive board.
For additional assistance contact Belleco’s Factory Service Team at 877-854-8006
(Continued page 5)
Page 5 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
TROUBLE SHOOTING CONTINUED
CONVEYOR DRIVE SYSTEM FLOW CHART
Note: refer to page 9 for component layout
(Continued page 6)
Page 6 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
CONVEYOR WILL NOT TURN
Note: refer to page 9 for component layout
(Continued page 7)
Page 7 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
HEAT SYSTEM FLOW CHART
Note: refer to page 9 for component layout
(Continued page 8)
Page 8 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
ONE OR MORE HEAT ZONES WILL NOT WORK
Note: refer to page 9 for component layout
Page 9 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
MAIN PANEL COMPONENT LAYOUT
C
A
D
B
F
E
A – Conveyor Speed Board
B – Power Supply, 24V DC
C – Motor Driver Board
D – Transformer, 24V AC
E – Heat Relay Bases (4 ea.)
F – DPDT Drive Relay (1 ea.)
Page 10 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
SECONDARY PANEL COMPONENT LAYOUT
H
I
J
G
G – Contactor/Relay
H – Terminal Block #6
I – Terminal Block #7
J – Fan Switch
Page 11 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
BACK SIDE VIEW OF CONTROL PANEL
A
C
B
D
E
BACK VIEW OF
DIGITAL DISPLAY
CONTROL
F
G
A – ON/OFF Switch, Push Button
B – Connector J12 (Wires to Speed Board)
C – Connector J7 (Heat Probes Zone 3 & 4)
D – Connector J1 (Heat Probes Zone 1 & 2)
E – Connector J37 (ON/OFF Switch, Soft Power)
F – Connector J13 (24 VDC Out To Heat and Drive Relays)
G – Connector J38 (Incoming 24 VAC power)
Page 12 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
MOTOR DRIVE BOARD
MOTOR DRIVE
BOARD
A1
A2
L1
L2
S3
S2
S1
H2
H1
IMPORTANT:
SET JUMPERS
4 & 8 IN THE ON
POSITION. ALL
OTHERS OFF
ON
OFF
1
4
5 6
7
8
TORQ
MIN
ACC
2 3
MAX
REG
z:\warranty\mclavet\wirediagram\mgdov\bodine.ds4
REMOVING NON-WORKING BOARD:
1). DISCONNECT UNIT FROM POWER SUPPLY.
2). Tag each wire connecting to terminals on board before removing wires.
3). Carefully disconnect wires from terminal.
4). Remove four (4) Philips head mounting screws and remove board.
INSTALLING NEW BOARD:
WARNING: THIS COMPONNET IS STATIC SENSITIVE. DO NOT SET
ON METAL SURFACE WHILE HANDLING BOARD.
1). IMPORTANT – SET JUMPERS ON NEW BOARD BEFORE INSTALLING AS
SHOWN ABOVE.
2) DO NOT TOUCH BLUE TRIM POTS ON BOARD.
3). Install new board and secure using 4 Philips head screws removed in step 4 above.
4). Connect wires to board and test.
Page 13 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
WIRE DIAGRAM
REV
DATE
D
7/22/13
Soft Power
ON/OFF
REVISION
DESCRIPTION
probe zone 2
probe zone 3
probe zone 1
probe zone 4
ECN #
chg probe positions on drawing
MJC
CONTROL SIDE OF UNIT
white white
red
red
blue blue black
red
black
red
green
block 4
red
blue
white
green
black
blue
purple
3
blue
blue
black
2
1
zone1
J12
4
1
zone2
L
5
3
drive
relay
N
J38
zone3
block 8
6
3
LED V+ V+ V- V- G
zone 4
5
12
3
8
7
24 VDC
POWER
SUPPLY
J7
3
6
J13
3
6
white
6
4 321
8
7
oven control board/panel
24 VAC
incoming
pwr
6
J37
black
J1
white
8
7
7 6 5 4 3 2 1
8
7
7
8
8
7
1
2
3
4
blue
red
Drive
Motor
zone1
CONVEYOR SPEED
REGULATOR
zone4
block 8
zone2
G
block 3
CONTROL SIDE
green
green
zone3
T2
T1
ORIENTATION: BEGIN HEATER
TUBE WIRING AT ZONE 2
MOTOR DRIVE
BOARD
CORD SIDE
IMPORTANT:
SET JUMPERS
4 & 8 IN THE ON
POSITION. ALL
OTHERS OFF
3
fuse 35 AMP
Fuse
MASTER ON/OFF
USE TERMINALS
A1 & A2
1
A1
B1
A2
B2
A3
B3
A1
A2
L1
L2
S3
S2
S1
H2
H1
2
ON
MASTER
ON/OFF
fan switch
1 234 5678
relay
block 5
OFF
4
4
3
2 1
block 7
block 6
fan motor
block 2
L1
reset
fan switch
L1
G
24 VAC
TRANSFORMER
capped off
L2
L2
230 VAC IN
green
yellow
24 VAC OUT
L1
yellow
green
block 1
fan motor
L2
to L1 side of main terminal block
BELLECO INC.
DRAWN BY: MICHAEL CLAVET
FOOD EQUIPMENT SPECIALISTS
P. O. BOX 880
SACO ME 04072
DATE: 07/16/2013
WD0037-D
HEATER TUBE WIRE DIAGRAM
MDG - 18 OVEN
208, 240 VOLT
SINGLE PHASE
z:\warranty\mclavet\wirediagram\mgdov\wirdiag6.ds4
Page 14 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
DRIVE SYSTEM WIRE DIAGRAM
DATE
ECN #
red
red
red
red
J1
black
J12
green
white
black
blue
purple
3
white
1
blue
blue
J38
2
1
5
4
12
L
J13
N
J7
3
drive
relay
LED V+ V+ V- V- G
4 3 21
6
J37
oven control board/panel24 VAC
incoming
pwr
5
7 6 5 4 3 2 1
8
7
24 VDC
POWER
SUPPLY
1
2
3
4
7
8
blue
Drive
Motor
block 3
T2
T1
MOTOR DRIVE
BOARD
CORD SIDE
IMPORTANT:
SET JUMPERS
4 & 8 IN THE ON
POSITION. ALL
OTHERS OFF
3
fuse 35 AMP
Fuse
MASTER ON/OFF
USE TERMINALS
A1 & A2
1
A1
B1
A2
B2
A3
B3
A1
A2
L1
L2
S3
S2
S1
H2
H1
2
ON
MASTER
ON/OFF
fan switch
1 23 4 56 7 8
relay
block 5
OFF
4
green
green
CONVEYOR SPEED
REGULATOR
G
4
3
2 1
block 7
fan motor
block 6
block 2
L1
capped off
L2
reset
fan switch
L1
G
24 VAC
TRANSFORMER
REV
Soft Power
ON/OFF
REVISION
DESCRIPTION
L2
230 VAC IN
green
yellow
24 VAC OUT
L1
yellow
green
block 1
fan motor
L2
to L1 side of main terminal block
BELLECO INC.
DRAWN BY: MICHAEL CLAVET
FOOD EQUIPMENT SPECIALISTS
P. O. BOX 880
SACO ME 04072
DATE: 08/23/2013
WD0043
DRIVE SYSTEM DIAGRAM
MDG - 18 OVEN
208, 240 VOLT
SINGLE PHASE
z:\warranty\mclavet\wirediagram\mgdov\drivewd.ds4
Page 15 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
HEAT SYSTEM WIRE DIAGRAM
REV
Soft Power
ON/OFF
REVISION
DESCRIPTION
DATE
probe zone 2
probe zone 3
probe zone 1
probe zone 4
ECN #
CONTROL SIDE OF UNIT
white
red
white
red
red
blue
blue
black black
red
green
block 4
red
black
J1
blue
green
6
6
white
6
5
J12
black
blue
purple
3
block 8
blue
blue
zone1
1
zone2
zone3
12
3
J38
zone 4
3
J7
3
J13
3
4 3 21
8
7
oven control board/panel24 VAC
incoming
pwr
6
J37
white
8
7
7 6 5 4 3 2 1
8
7
7
8
8
7
1
2
3
4
blue
red
zone1
zone3
zone4
block 8
zone2
block 3
CONTROL SIDE
ORIENTATION: BEGIN HEATER
TUBE WIRING AT ZONE 2
4
WITH RIGHT TO LEFT
BELT TRAVEL
relay
block 5
CORD SIDE
3
fuse 35 AMP
MASTER
ON/OFF
fan switch
2
MASTER ON/OFF
USE TERMINALS
A1 & A2
1
A1
B1
A2
B2
A3
B3
4
3
2 1
block 7
block 6
fan motor
block 2
L1
fan switch
L1
G
24 VAC
TRANSFORMER
capped off
L2
reset
L2
230 VAC IN
yellow
24 VAC OUT
L1
yellow
block 1
fan motor
L2
to L1 side of main terminal block
BELLECO INC.
FOOD EQUIPMENT SPECIALISTS
P. O. BOX 880
SACO ME 04072
DRAWN BY: MICHAEL CLAVET
DATE: 08/23/2013
WD042
HEATER SYSTEM WIRE DIAGRAM
MDG - 18 OVEN
208, 240 VOLT
SINGLE PHASE
z:\warranty\mclavet\wirediagram\mgdov\htdiag.ds4
Page 16 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
PARTS LIST
DESCRIPTION
Drive Motor
Sprocket, Driven, 25B 24 x 3/8
Sprocket, Drive, 25B11 x 5/16
Chain ,Ladder, Drive 21 ¼”
Conveyor Drive Shaft
Conveyor Idler Shaft
Conveyor Belt, 82.5”
Support, Conveyor Belt
Quick Clips, Master Links
Bushing, Spring Loaded
Conveyor Speed Board, 24V
Spring, Front Busing Idler Shaft
Motor Control Board, 24VDC
Rear Bushing Assembly, 3/8”
Power Supply, 24VDC
Transformer, 24VAC
Fuse, 1 Amp 4XH40
Fuse Holder, 1 Amp
Socket, Motor Relay
Relay, Motor, 24VDC, DPDT
Digital Display Control
Probe, Temperature
Retainer Plate, Heater Tube
QTY
1
1
1
1
1
1
1
1
4
2
1
2
1
2
1
1
1
1
1
1
1
4
4
PART No.
401215
401304
401301
401399
201987
201986
201987
401370
401337
401353
401153
400263
401163
201101
401164
401155
401167
401148
401170
401157
401152
401154
305749
DESCRIPTION
Relay, Heaters, 24VDC, SPDT
Socket, Heat Relay
Clip, Heater Relay
Fuse, 30 Amp KTK-R-30 600V
Fuse Holder w/Wires
Power Switch, Push Button Red
Toggle, Main Power Switch
Switch, Hi-Limit/Reset
Switch, Fan Motor
Motor, Fan
Guard, Fan Motor
Cord, Fan Motor
Cord, Power, 10/3, 6-30P
Contactor, 6X566
Leg, 4” Metal
Knob, Heat Shutter
Tray, Load Up
Tray, Unload
Crumb Tray Assembly
Heat Shutter
Heater Tube, 208V, 546W
Heater Tube, 240V, 546W
QTY
4
4
8
1
1
1
1
1
1
2
2
1
1
1
4
4
1
1
2
2
12
12
PART No.
401156
401171
401172
401169
202051
202052
401116
401100
401107
401211
401220
401060
401059
401136
400301
401188
305774
100206
100212
305755
204246
204247
Page 17 of 18
FIELD SERVICE MANUAL
CONVEYOR OVEN MODEL
MDG-18
ASSEMBLY EXPLODED VIEW