Blodgett TBG36-FM Installation and operating manual

TBG36-CM, TBG36-FM AND TBG36-S
ELECTRIC CONVEYOR GRILL
SERVICE AND REPAIR MANUAL
BLODGETT OVEN COMPANY
www.blodgettcorp.com
50 Lakeside Avenue, Box 586, Burlington, Vermont 05402 USA Telephone [phone] Fax: [phone]
PN G0173 Rev A (7/01)
E2001 --- MagiKitch’n Incorporated

TABLE OF CONTENTS
i
1. INTRODUCTION
Unit Description 1 --- 1..................................................................
Specifications 1 --- 2....................................................................
Required Service Tools 1 --- 3............................................................
Electrical Safety 1 --- 3..................................................................
Wiring Diagrams 1 --- 4..................................................................
2. UNIT CONTROLS
Controls Identification 2 --- 1.............................................................
Programming Flow Chart 2---2..........................................................
Operation Flow Chart 2 --- 3.............................................................
Calibration Flow Chart 2 --- 4.............................................................
Controller Removal and Replacement 2---7...............................................
Switch Replacement 2 --- 9..............................................................
3. TEMPERATURE CONTROL
Description 3 --- 1......................................................................
Wiring Diagram 3 --- 2...................................................................
Troubleshooting 3 --- 3..................................................................
Thermostats 3 --- 3..................................................................
Overtemperature Safety Thermostat Circuit 3---4.......................................
Thermocouple Diagnostic Procedure 3---5................................................
Platen Contactor Diagnostic Procedure 3---7..............................................
4. PLATENS
Description 4 --- 1......................................................................
Platen Diagnostic Procedure 4---2.......................................................
Platen Removal and Replacement 4---3..................................................
Platen Removal 4 --- 3...............................................................
Platen Replacement 4 --- 5...........................................................
Platen Alignment 4 --- 6.................................................................
5. POSITION CONTROL
Description 5 --- 1......................................................................
Troubleshooting 5 --- 2..................................................................
Wiring Diagram 5 --- 3...................................................................
Lift Motor 5 --- 4........................................................................
Diagnostic Procedure 5---4..........................................................
Setting Lift Motor Limit Switches 5---4................................................
Removing and Replacing the Lift Motor 5---5..........................................
Linear Potentiometer 5 --- 6..............................................................

TABLE OF CONTENTS
ii
6. MISCELLANEOUS COMPONENTS
Hourmeter 6 --- 1.......................................................................
Drive Motor 6 --- 2......................................................................
Description 6 --- 2...................................................................
Drive Train Troubleshooting Guide 6---3..............................................
Drive Motor Removal and Replacement 6---4..........................................
Drive Motor Components Wiring Diagram 6---6........................................
Speed Sensor Removal and Replacement 6---7...........................................
Drive Roller and Bearing Block Removal and Replacement 6---8............................
Idle Roller Tension Blocks 6---10..........................................................
Wipers 6 --- 1 1..........................................................................
7. MAINTENANCE
Service Checks 7 --- 1...................................................................

INTRODUCTION
CHAPTER 1

BLODGETT CONVEYOR GRILL
1 --- 1
UNIT DESCRIPTION
The Blodgett Conveyor Grill is a microprocessor
controlled conveyorized belt cooking grill built by
Blodgett. The Blodgett Conveyor Grill uses two Tef-
loncoated woven fiberglass belts each encircling
an electrically heated aluminum cooking platen.
Food placed on the lower belt travels over a pre-
heat zone where the product is slightly thawed (in
the case of frozen food) and then between the up-
per and lower platens where it is cooked on both
sides simultaneously. After cooking, the food falls
into a receiving pan. During the cooking process,
wipers remove excess grease from the belts and
collect it in a grease pan or bucket in the bottom of
the unit.
The conveyor cooking technique assures consis-
tent, dependable results. By precisely controlling
all the variables --- cooking time, temperature, belt
speed and product contact pressure --- the possi-
bility of improper cooking due to operator error or
inconsistency is greatly minimized. However, it is
still the responsibility of the person(s) operating the
machine to periodically check that the food is prop-
erly cooked. The microprocessor controller pro-
vides six easy to use programmable menu selec-
tions at the push of a button.
Control Panel
Upper&LowerConveyorBelts
Idle Roller
Crumb Tray
Food Receiving Pan
Door Panel
Grease Pan
Lower Platen Deck
Upper Platen Deck
Drain Trough
Baffle & Pan Guide
Lower Wiper Assembly
Upper Wiper Assembly
Emergency Lift Button
Lift Enable Button
Main Power Switch
FIGURE 1

INTRODUCTION
1 --- 2
SPECIFICATIONS
DIMENSIONS AND WEIGHT SPECIFICATIONS
TBG36-CM/AA
Counter Model
TBG36-FM/AA
Floor Model
TBG36-S/AA
Stackable Model
Width 35.75” (91 cm) 35.75” (91 cm) 43” (109 cm)
Height 31.5” (80 cm) 49.5” (126 cm) 69” (175 cm)
Depth 33.75” (86 cm)* 33.75” (86 cm)* 33.75” (86 cm)*
Weight
Crated
Uncrated
680 lbs (308 kg)
580 lbs (263 kg)
790 lbs (353 kg)
690 lbs (313 kg)
1545 lbs (701 kg)
1445 lbs (655 kg)
NOTE: * Includes 1.5” ( 3.81 cm) box on rear cover.
TABLE 1
TBG36-CM/AA, TBG36-FM and TBG36-S/AA ELECTRICAL SPECIFICATIONS
Hz Volts Phase Amps
60/50 208 3 50
60/50 220 3 47
60/50 240 3 43
60/50 440 3 24
60/50 480 3 22
60/50 380 3 27
60/50 415 3 25
A 3 phase, 50/60 Hz, 3-wire grounded equipment branch circuit, permanently connected in accor-
dance with applicable articles of ANSI/NFPA 70 (NECcode), is required. The stack capacity unit
requires two identical circuits.
Provision is made for 1-1/2” trade size conduit for incoming power. ULListed reducing seals (do-
nut washers) will be required if a smaller size fitting is used. See the Electrical Installation Manual,
P/N 31-12-11343 for details.
Stack capacity (TBG36-S) model requires (2) power feeds, (1) for each cooking section. The stack
capacity design is not currently UL listed in Canada.
TABLE 2

BLODGETT CONVEYOR GRILL
1 --- 3
REQUIRED SERVICE TOOLS
In addition to tools normally used when servicing
appliances, you may need the following tools:
These tools can be ordered individually from Blod-
gett Technical Service (888-992-6624 phone;
802-860-3784 fax) using the Blodgett part num-
bers shown or a complete kit of these items is avail-
able from Blodgett under part number G0235, TBG
Service Tools Kit. In either case, the tools will be
supplied at cost with no mark-up on a one-time ba-
sis. Replacement tools will be billed at the usual
dealer/agency price.
A Service Parts Replacement Kit (part number
G0236) is also available. This kit contains parts that
normally require replacement and a few critical
components. This kit will be billed at full price with
replacements made for warranty usage when ac-
companied by complete documentation.
QTY DESCRIPTION P/N
1Digital Multimeter AmprobeAM-1260 or similar;
Blodgett P/N G0237
1Clamp-on ammeter Amprobemodel RS-3 or similar;
Blodgett P/N G0238
124 VDC lift motor power supply (optional) Blodgett P/N G0239
1MolexMini fit crimping tool Molex11-01-0197-P;
Blodgett P/N G0240
1MolexMini fit pin extraction tool Molex11-03-0044;
Blodgett P/N G0241
20 MolexMini fit Jr. female pins Molex39-00-0039;
Blodgett P/N G0242
1Anti-seize compound, food grade, can McMaster 1404K11 or similar;
Blodgett P/N G0243
TABLE 3
ELECTRICAL SAFETY
De-energizing the unit
For servicing purposes throughout this manual,
two distinct operations are referred to frequently
and their meaning must be understood clearly for
your safety. One is the use of the Main Power
Switch and the other is “disconnect supply power”.
The main power switch turns the Blodgett Convey-
or Grill on and off for all user purposes. When work-
ing inside the machine, however, the main power
feed wires and over-temperature protection ther-
mostat wiring are very much alive and remain so
whetherthemainpowerswitchisonoroff.
To de-energize the machine completely, the
supply power must be disconnected at the cir-
cuit breaker or (fused) disconnect switch la-
beled for this unit.
NOTE: Stack capacity units have separate power
supplies. Be sure the power has been
turned off for the appropriate unit.

INTRODUCTION
1 --- 4
WIRING DIAGRAMS
FIGURE 2

BLODGETT CONVEYOR GRILL
1 --- 5
FIGURE 3

UNIT CONTROLS
CHAPTER 2