Blodgett MT3870 Service Manual

MT3870

CONVEYOR OVEN

SERVICE AND REPAIR MANUAL

BLODGETT OVEN COMPANY

www.blodgettcorp.com

50 Lakeside Avenue, Box 586, Burlington, Vermont 05402 USA Telephone (802) 658Ć6600 Fax: (802)864Ć0183

PN M7489 Rev B (6/01)

Duplication of the information in this manual is prohibited without the consent of the Blodgett Service Department.

TABLE OF CONTENTS

1. INTRODUCTION

Oven Specifications 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ventilation Requirements 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Specifications 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gas Specifications 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Illustrated Parts Lists 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. ASSEMBLY

Oven Assembly Procedures 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Return Air Diverters 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air Nozzles 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Conveyor Rack Assemblies 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wire Conveyor Belt 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Drive Chain 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air Plates 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

End Plugs 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Conveyor Belt Tensioners 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Crumb Pans 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mount Remote Control 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

False Front (If Applicable) 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3. OPERATION

Computer Controller 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Control Description 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Control Operation 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Programming Procedures 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display Information 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sequence of Operation 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Domestic and General Export Ovens 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CE Ovens 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Oven Adjustments for Cooking 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Temperature 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Conveyor Speed Time vs. Temperature 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air Flow Adjustments 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4. CALIBRATION AND ADJUSTMENT

Convection Blower Motors 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

To check motor rotation 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

To check lowĆlimit 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Regulated Gas Pressure 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Computer Control Configuration 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Temperature Calibration 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE OF CONTENTS

Belt Speed Calibration 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Closed Loop System 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Open Loop System - Single belt 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Open Loop System - Twin Belt 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

motor control Board Adjustment 4-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rerating the Appliance 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Checking the Firing Rate 4-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5. TROUBLESHOOTING

DC Drive System 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Computer Control System 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heating System 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Convection System 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6. TECHNICAL APPENDIX

Intermittent Ignition System 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Principles of Operation 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Procedures 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Servicing the Invent Hood 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Illustrated Parts List 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cleaning and Maintenance 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Servicing Access 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pressure Conversion 6-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Conversion Factors 6-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cooking Computer - Temperature vs Resistance 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Literature Addendum

Operation - Cooking Computer without Conveyor Control

NOTE: This addendum applies to tandem ovens only.

CONTROL DESCRIPTION

1. DIGITAL DISPLAY - Displays the time, temĆ perature and controller related information.

2. OVEN ON/OFF - Controls power to the oven.

3. NUMERIC KEYS - Used to enter numerical data in the programming mode.

4. CLEAR KEY - Used to clear the display if an error is made in the programming mode.

5. SET TEMP KEY - Used to view or program the temperature setpoint.

6. ACT TEMP KEY - Used to view the current oven temperature.

7. PROG/ENTER KEY - Used to enter and exit the programming mode. Also used to lock in programmed settings.

8. STATUS LAMPS - When lit indicate that the fan or burners are operating.

This oven, supplied with remote control, is equipped with an emerĆ gency shut down switch.

Should you need to stop the heat press the emergency switch.

Do not use the emergency switch as a GENERAL on/off switch!

NOTE:

WARNING:

4567

??????

Rev - 10/9/96

Page 1 of 3

Literature Addendum

Operation - Cooking Computer without Conveyor Control

OPERATION

To turn the oven on:

1. Turn the manual gas valve to ON.

2. Press and hold the ON/OFF key (2). The disĆ play reads OFF when the oven is idle.

3. The display will flash WAIT  LOW  SET 

TIME  0.

4. The FAN and HEAT status lamps (9) light. The fans begin to run. The heat rises to the temperature setting stored in the computĆ er's memory. The conveyor default time is 0.

To display the actual oven temperature:

1. Press the ACT TEMP key (6). The LED on the key will light and the display reads ACĆ

TUAL  nnnnF.

To view the temperature set point:

1. Press the SET TEMP key (5). The LED on the key will light and the display flashes SET 

TEMP  nnnnF.

To turn the oven off:

1. Press the ON/OFF key (2). The fans will conĆ tinue to run until the oven cools to a safe temperature.

OVEN SHUTĆDOWN

Turn the Computer Controller off (press and moĆ mentarily hold the ON/OFF key). Since the Cool Down circuit is already energized, the blower motor(s) will continue to run until the oven reaches approximately180F (82C). The blowĆ er motor(s) will then automatically shut off.

COOLĆDOWN CIRCUIT

Blodgett Mastertherm conveyor ovens are equipped with a coolĆdown feature for motor shaft and bearing protection. When the oven reaches approximately 180F (82C), the relay contacts close allowing the blower motor(s) to continue to run regardless of the Computer Controller status. As noted previously, the blowĆ er(s) will continue to run until the temperature drops below 180F (82C).

NOTE:

This oven, supplied with remote control, is equipped with an emerĆ gency shut down switch.

Should you need to stop the heat press the emergency switch.

WARNING:

Do not use the emergency switch as a GENERAL on/off switch!

M7260.1

Rev - 9/5/96

Literature Addendum

Operation - Cooking Computer without Conveyor Control

PROGRAMMING PROCEDURES

Programming the Cook Time:

1. The conveyor belt default time is 0.

Programming the Temperature:

1. Press the PROGRAM/ENTER key (8).

2. Press the SET TEMP key (5). The display

reads PROGĆ?  SET  TEMPĆ?  _ _ _ _F.

3. Use the NUMERIC keys (3) to enter the deĆ sired temperature set point. The control disĆ plays the numbers as they are entered. If an error is made, press the CLEAR key (4) and reĆenter the number.

4. Press the PROGRAM/ENTER key (8) again.

5. Press the PROGRAM/ENTER key (8) a secĆ ond time to lockĆin the new temperature. The new temperature setpoint will be stored in the computer's memory.

Operation at the Programmed Settings:

1. Press and hold the ON/OFF key (2).

2. The FAN and HEAT status lamps (9) light. The fans begin to run. The heat rises to the temperature setting stored in the computĆ er's memory.

3. The display will flash WAIT  LOW  SET  TIME  0 until the programmed bake temperĆ ature is reached. The HEAT lamp (9) will reĆ main lit until the oven reaches the temperaĆ ture set point.

4. The display reads READY and the HEAT lamp (9) goes out.

5. The oven is now ready to accept product.

6. Press and hold the ON/OFF key (2) to turn the oven off. The fans continue to run while the oven cools to a safe temperature.

DISPLAY INFORMATION

 WAIT  LOW - indicates that the present oven

temperature is lower than the set point temĆ perature. When the oven reaches the set point temperature the display changes to READY.

 READY - indicates that the oven is ready to

accept product.

 SET  TIME  0 - indicates the current cook

time setting.

 HIGH  TIME - indicates that the temperature

is well above the set point. This usually occurs when moving from a higher āto a lower temperĆ ature. Wait until the display reads ready beĆ fore loading product.

 HIGH  TEMP  LIMIT - indicates that the oven

temperature exceeds the high limit. The Over Temperature Alarm buzzer will sound. Shut the oven off and wait for the unit to cool down.

 HIGH  TEMP  PANEL - indicates that the

control area reaches an excessive temperaĆ ture. Shut the oven off and wait for the unit to cool down.

 PROBE  OPEN  PROBE  SHORT - indicates

that the temperature sensor has failed. The Alarm buzzer sounds. Shut the oven off and contact a service representative.

NOTE:

This oven, supplied with remote control, is equipped with an emerĆ gency shut down switch.

Should you need to stop the heat press the emergency switch.

WARNING:

Do not use the emergency switch as a GENERAL on/off switch!

??????

Rev - 10/9/96

Page 3 of 3

CHAPTER 1

INTRODUCTION

MT3870

OVEN SPECIFICATIONS

VENTILATION REQUIREMENTS

The hood should completely cover the unit with an overhang of at least 6" (15 cm) on all sides not adjaĆ cent to a wall. The distance from the floor to the lower edge of the hood should not exceed 7' (2.1 m). The ventilation system should replace 80% of the exhaust volume with fresh make up air. TABLE 1 should be used as a guideline.

Single Double Triple

CFM 1200Ć1650 2400Ć3300 3600Ć5000

M3/min 34 Ć 47 68Ć93 102Ć142

TABLE 1

ELECTRICAL SPECIFICATIONS

NOTE: Three Phase hookup is not permitted.

WARNING: DO NOT INSTALL A HIGH LEG" TO ANY CONVEYOR OVEN!

120

208Ć240

OvenSupply

Installations within the U.S.

The MT3870 requires a 15 Amp, 60HZ, 1F, 208Ć240VAC, 4 wire service consisting of L1, L2, neutral and ground. See FIGURE 1. Use 90C wire and size to National Electric or local codes.

Installations outside the U.S.

The MT3870 requires a 15 Amp, 50Hz, 1F, 230 VAC, 3 wire service consisting of L1, neutral and ground. See FIGURE 1. Use 90C wire and size wire according to local codes.

CE approved installations

Connect the oven to a separate group 230V, 50 hz with rigid connection and circuit breaker. The cirĆ cuit breaker should disconnect all poles, including neutral with a contact separation of at least 3 mm.

NOTE: The burner control unit is phase sensitive.

If the phase and neutral are switched the control locks out.

Connect exhaust fan connector 1 and 2. See FIGURE 1. Connect phase + neutral + ground.

220Ć230

OvenSupply

U.S. Installations Export Installations

Blodgett

Connector

21Air Pressure Regulator

Connector

Burner Control Solenoid

2Ć4Ć92

1 2

Fan

Relay A

CE Approved Installations

FIGURE 1

1-1

GAS SPECIFICATIONS

INTRODUCTION

GAS CONNECTIONS

Domestic and General Export installations

The gas line should be large enough to accommoĆ date the peak demand of all the gas appliances. TABLE 2 reflects a straight line, 50 foot run with no coupling restrictions and no other appliances drawing service. Gas line installations MUST conĆ form to National Fuel Gas Code NFPA 54/ANSI Z223.1 Sec. 1.4 (Latest Edition). TABLE 2 should be used as a guideline only.

NOTE: For any pipe runs over 50 feet (15 m), conĆ

sult the factory.

CE approved installations

1. Connect the oven to the gas line with the propĆ er type of gas according to Local and National Installation Standards. See TABLE 2.

DOMESTIC AND GENERAL EXPORT

Natural Gas Propane Gas

Gas Line Sizing

GAS REQUIREMENTS

The firing rate for the MT3870 is 150,000 BTU/Hr. (43.9 kW/Hr.)

NOTE: For natural gas meter sizing, consult your

local gas company to ensure that your meĆ ter will provide the proper supply.

Installations within the U.S.

1. Add the total BTU's/hr of all the gas appliances.

2. Convert BTU's to cubic ft/hr using the formula Cu Ft/Hr = 1000 BTU/Hr for natural gas.

3. Size the meter accordingly.

Installations outside the U.S.

1. Add the total M3/min of all the appliances.

2. Size the meter accordingly.

Single

Double

Triple

Orifice Size #1 #29

Incoming Gas Pressure W.C. kPa mbar W.C. kPa mbar

Static

Operational

CE APPROVED UNITS

Type of

Gas

G25 25 12 5,80 16 2 x 0,63 46 Nat. Gas

G20 20 8 5,80 16 2 x 0,63 46 Nat. Gas

G20/G25 20/25 Totally Inscrewed

G30 30/50 17 3,48 16 2 x 0,30 46 Butane

G31 30/37/50 24 3,48 16 2 x 0,30 46 Propane

Inlet

Pressure

mbars

Burner Pressure

Pressure Regulator

5.5"

mbars

3/4" line

1Ć1/4" line

1.74

1.36

Injector

Diameter

TABLE 2

3/4" line

1 line

1Ć1/4" line

17.4

13.7

Opening

5,15 16 2 x 0,63 46 Nat. Gas

Air

12.5"

11"

Pilot

Injector

3.11

2.73

Standard

Delivery

Value kW (HS)

31.1

27.4

1-2

MT3870

ILLUSTRATED PARTS LISTS

ELECTRICAL COMPONENTS

NOTE:  = ASAP Distributor Required Stocking Parts

Ref.

Part

No.

No. Description

Ref.

Part

No.

No. Description

1  M6474 Computer Control Kit, Closed

Loop SB (Qty 1)

1  FW525 Computer Control Kit, Closed

Loop SB (Qty 1) (Reconditioned)

M5635 Computer Control Kit, Open

Loop TB (Qty 1)

M3175 Decal, Lexan Control (Qty 1)

 M7427 Probe, Temperature RTD, 500

OHMS (Qty 1)

M7202 Conversion Kit, Open Loop to

Closed Loop (Qty 1)

M3347 Cable, Computer Control, 25

Pin, 10' (Qty 1)

 M3348 Cable, Computer Control, 9

Pin, 10' (Qty 1)

M3490 Cable, Computer Control, 25

Pin, 50' (Qty 1)

M3491 Cable, Computer Control, 9

Pin, 50' (Qty 1)

 M3349 Harness, Inter-Connecting DC

Drive, 3-Wire (For 9 Pin) (Qty 1)

M3353 Harness, Relay Board

(Open Loop) (For 25 Pin) (Qty 1) (Before 9/15/95)

M7237 Harness, Relay Board (Closed

Loop) (For 25 Pin) (Qty 1) (After 9/15/95)

2 M3314 Bracket, Computer Wall (Qty 1)

M5661 Bracket Assy., Cable Clamp

(Qty 1)

3  M0984 Pick Up, PV-2 (Qty 1) (After

9/15/95)

4 M7236 Board, Relay/Transformer

(Qty 1)

5  22672 Relay, Control (Qty 4)

6  M3352 Transformer, 120V to 24V

(Qty 1)

7  20349 Buzzer, 120V (Qty 1)

8  M3295 Thermostat, High Limit

(Manual Reset) (Qty 1)

9  M1362 Snap Disc, L140/20F, 2 Pole

SPST (Qty 1)

 M2453 Snap Disc, L140/20F, 3 Pole

SPDT (Qty 1)

10  M0595 Switch, Air Pressure SPDT

(Qty 1)

11  M0152 Contact, Emergency Stop

Switch (Qty 1)

12 M3296 Activator, Emergency Stop

Switch (Mushroom Shape) (Qty 1)

M3297 Nameplate, Emergency Stop

(Qty 1)

13 M0593 Terminal Block, 2 Pole (Qty 1or

CE Qty 2)

 M2469 Fan, Axial 110 CFM 4 1/2" (Qty

4) (Before 11/14/95)

22718 Fan Guard & Hardware (Qty 3)

(Before 11/14/95)

 M0572 Cord, Axial Fan 30" Power (Qty

4) (Before 11/14/95)

14  M6381 Blower, Cooling (Qty 1) (After

11/14/95)

15  M3136 Breaker, 7 AMP Circuit (Qty 4)

16  M2772 Breaker, 4 AMP Circuit (Qty 2)

M6590 Plate Assy., Control SB (Qty 1)

M7482 Plate Assy., Control TB (Qty 1)

M1694 Cord Set & Plug Assy., 10 Foot

(Qty 1)

M0772 Receptacle, Twist Lock (Qty 1)

17  M0708 Contactor, 3 Pole, 120V Coil

(Qty 1)

18  M3322 Hood Interlock, Mechanical

(Qty 1)

1-3

CONVEYOR COMPONENTS

NOTE:  = ASAP Distributor Required Stocking Parts

* = Item is Too Large for UPS

Ref.

Part

No.

Description

Ref. No.

Part No.

INTRODUCTION

Description

19 M6338 Belt, Wire S/S (Total Length

38" SB (Per Foot) MT3870 18 FT, MT3855 16 FT)

M7889 Belt, Wire S/S (Total Length

18-1/2" TB (Per Foot) MT3870 18 FT)

20 M7272 Tensioner (After Assy., Belt

MT3870 (Qty 2) 9/15/95)

21 M2379 Speed Control Board, Bodine

(Qty 1)

M2254 Fuse, Line, 22 Bodine Board, 5

AMP, 125V (Qty 1)

M2316 Fuse, (Qty 1) 23 Armature,

Bodine Board, 200 MA, 250V

24 M3301 Capacitor, (SB Qty 1 or Speed

Control Board TB Qty 2)

25 M2378 Motor, (SB Qty 1 or Conveyor

Drive, Bodine 130V TB Qty 2)

M2500 Brush Set, Bodine (Qty 1)

M0391 Chain, Drive & Order (SB SpecĆ

ify 2 FT or TB Specify 4 FT M0112)

M0112 Masterlink, Drive Chain (Qty 1)

M6791 Guard, Drive 26 Chain SB (Qty

M6482 Guard, Drive Chain TB (Qty 1)

* M3981 Conveyor (Before Assy., Drive

SB MT3870 (Qty 1) 9/15/95)

27 * M6154 Conveyor (After Assy., Drive SB

MT3870 (Qty 1) 9/15/95)

* M3982 Conveyor (Before Assy., Idle

SB MT3870 (Qty 1) 9/15/95)

28 * M6155 Conveyor (After Assy., Idle SB

MT3870 (Qty 1) 9/15/95)

* M7592 Conveyor Assy., Drive TB

MT3870 (Qty 1)

* M7593 Conveyor Assy., Idle TB

MT3870 (Qty 1)

* M4432 Conveyor (Qty 1) Assy., Drive

SB MT3855G (Before 11/14/95)

* M4433 Conveyor (Qty 1) Assy., Idle SB

MT3855G (Before 11/14/95)

* M6777 Conveyor MT3855G Assy.,

Folding (Drive & Idle) SB (Qty

1) (After 11/14/95)

29 M2672 Shaft, Conveyor Drive (Qty 1)

30 M2673 Shaft, Conveyor Idle (Qty 1)

31 M0109 Sprocket, Motor Drive, 12 Tooth

(Qty 1)

M0110 Sprocket, Conveyor Drive, 15

Tooth (Qty 1)

32 M0108 Sprocket, Conveyor Belt, 11

Tooth (Qty 18)

1-4

MT3870

CONVECTION COMPONENTS

NOTE:  = ASAP Distributor Required Stocking Parts

Part

Ref.

No.

33 M4224 Motor & Blower Assy. CW

34 M4225 Motor & Blower Assy. CCW

M5419 Motor & Blower Assy. CCW

M2564 Capacitor, Motor MT3870

NOTE: Call factory if MT3855G oven was

manufactured before 2/27/94 to verify motor part number.

M5722 Insulation Kit for Blowers

M7991 Insulation Kit for Blowers

35 M6466 Nozzle Assy. w/ Diverter

M5466 Nozzle Assy. w/ Diverter

M7105 Nozzle Assy. w/ Diverter

M7106 Nozzle Assy. w/ Diverter

Description

MT3870 (Qty 2)

MT3855G (Qty 3) (After 2/27/94)

(Qty 4)

MT3870 (Qty 1)

MT3855G (Qty 1)

MT3870 (Qty 14) Generic

MT3855G (Qty 12) (Before 11/14/95)

MT3855G (Qty 6) (After 11/14/95) (See L-497)

Ref.

Part

No.

M1962 Hold Down, Nozzle MT3870

M7399 Hold Down, Nozzle MT3870

M5486 Hold Down, Nozzle MT3855G

M7380 Hold Down, Nozzle MT3855G

36 M3106 Diverter, Air (LH & RH) MT3870

M3106 Diverter, Air (LH & RH)

M5179 Diverter, Air (LH & RH)

M5453 Diverter, Air (Center) MT3855G

M7372 Diverter, Air (LH) MT3855G

M7374 Diverter, Air (RH) MT3855G

M7373 Diverter, Air (Center) MT3855G

Description

(Qty 1) (Before 9/15/95)

Qty 1) (After 9/15/95)

(Qty 1) (Before 11/14/95)

(Qty 1) (After 11/15/95)

(Qty 2)

MT3855G (Qty 2) (Before 11/14/95)

(Qty 1)(Before 11/14/95)

(Qty 1) (After 11/14/95) (See L-495 & L-496)

AIR PLATES

NOTE:  = ASAP Distributor Required Stocking Parts

Ref.

Part

No.

No. Description

37 M6470 Plate Assy., Air RH MT3870

Generic (Qty 1)

38 M6469 Plate Assy., Air LH MT3870

Generic (Qty 1)

M5767 Plate Assy., Air RH (R to L)

MT3855G Generic (Qty 1)

M5768 Plate Assy., Air LH (R to L)

MT3855G Generic (Qty 1)

M5648 Plate Assy., Air RH (L to R)

MT3855G Generic (Qty 1)

1-5

Ref.

Part

No.

No. Description

M5649 Plate Assy., Air LH (L to R)

MT3855G Generic (Qty 1)

24613 Hook, Air Pan (Qty 1)

39 M6597 Plate Assy., Block Off MT3870

Generic (Qty 6)

M6079 Plate Assy., Block Off MT3855G

Generic (Qty 6)

GAS BURNER COMPONENTS

NOTE:  = ASAP Distributor Required Stocking Parts

INTRODUCTION

Part

Ref.

No.

40 22132 Burner Assy. Complete (Specify

41 M0767 Blower Motor, Comb. w/ ConĆ

42 M2383 Blower Motor, Combustion

43 M2381 Transformer, 120V to 24V

44 M2382 Relay, Time Delay (Qty 1)

45 M0454 Orifice, Main Burner LP (Qty 1)

45 M0455 Orifice, Main Burner Natural

46 M2727 Pilot Burner & Igniter Assy. LP

46 M2726 Pilot Burner & Igniter Assy.

47 M6378 Shield, Pilot Burner (Qty 1)

48 M0415 Flame Sensor (Qty 1)

49 M2690 Orifice, Pilot LP (Qty 1)

49 M0697 Orifice, Pilot Natural (Qty 1)

50 M0248 Tube, Pilot Aluminum 1/4"

51 M0959 Fitting, Compression 1/4

52 M2799 Union, Compression (Qty 1)

53 21225 Fitting, Elbow (Qty 1)

54 4588 Nipple, Pipe 3/4 x 1-3/8 Close

55 M0280 Tee, 3/4 x 3/4 x 1/4 (Qty 1)

56 M0278 Bushing, 1/4 x 1/8 Hex (Qty 2)

57 M0281 Plug, Pipe 1/8 Black (Qty 2)

58 17874 Ell, Black 1/2 x 3/4 (Qty 1)

59 M0590 Nipple, Pipe 1/2 x 2-1/2

60 M0279 Union, 1/2 Inch Black (Qty 1)

61 1949 Nipple, Pipe 1/2 x 1-3/16

62 M0317 Elbow, 1/2 Inch Street 90 Deg

Description

Model & Gas Type) (Qty 1)

trol Box (Qty 1)

(Qty 1)

Natural (Qty 1)

(1.583 Feet)

(Qty 2)

(Qty 3 or CE Qty 2)

(Qty 1)

Close (Qty 1)

(Qty 1)

Ref.

Part

No.

63 21278 Nipple, Pipe 1/2 x 3-1/2

64 M3238 Tee, 1/2 x 1/2 x 1/4 (Qty 1)

65 23007 Spring, Solenoid Valve, LP to

65 18612 Spring, Solenoid Valve, Natural

23114 Conversion Kit, LP to Natural

21389 Conversion Kit, Natural to LP

M5259 Conversion Kit, LP to Natural

M5290 Conversion Kit, Natural to LP

66 M0282 Valve, Manual Gas (Qty 1)

67 M5495 Dual Solenoid/Pressure ReguĆ

67 22190 Dual Solenoid/Pressure ReguĆ

68 M1054 Spark Box, Johnson (Qty 1)

21242 Connector Kit, Gas Flex 48"

21826 Connector Kit, Gas Flex 36"

69 M7280 Flame Tube Assy., MT3870

M7390 Flame Tube Assy., MT3855G

Description

(Qty 1)

Natural (Qty 1)

to LP (Qty 1)

MT3870 (Qty 1)

MT3855G (Qty 1)

lator, Nat 24V (Qty 1)

lator, LP 24V (Qty 1)

(Qty 1)

1-6

MT3870

EXTERIOR COMPONENTS

NOTE:  = Doors are not returnable

Part

Ref.

No.

 M2868 Door Assembly, Pull Down S/S

M2188 Handle Kit, Door 2" (used

70  M3944 Door Assembly (used w/ false

71 M4275 Handle Kit, Door 22" (used w/

72 M1871 Plate, RH Pivot Slotted (Qty 1)

73 M1872 Plate, LH Pivot Slotted (Qty 1)

74 M3602 Bracket Assy., Mounting (Qty 2)

75 M3603 Bracket Assy., Mounting (Qty 2)

M5475 Filter Assy., MT3855G (Qty 1)

76 M3751 False Front Assy., MT3870

M4563 False Front Assy., MT3855G

M3751 Tape, Closed Cell Foam

M5032 Chimney Kit, Single (Qty 1)

M7464 Chimney Kit, Single (Qty 1)

M7160 Chimney Kit, Double (Qty 1)

M7463 Chimney Kit, Double (Qty 1)

21390 Legs, 17-1/4" w/ Casters

21391 Legs, 23-1/4" w/ Casters

14444 Casters, Cradle (Triple Oven)

77 M3783 Stop, Product S/S (Qty 1)

78 M3779 Extension Assy., Product 6"

M4223 Extension Assy., Product 10"

Description

(used w/enclosed Greenheck hood system) (Qty 1)

w/M2868) (Qty 1)

front) (Qty 1)

M3944) (Qty 1)

(Before 11/14/ 95)

(Qty 1)

(Before 11/95)

(After 11/95)

(Before 11/95)

(After 11/95)

(Double) (Set of 4)

(Single) (Set of 4)

(Set of 4)

(Qty 1)

Ref.

Part

No.

M7575 Extension Assy., Product 15"

M2824 Crumb Pan, Idle MT3870

79 M6168 Crumb Pan, Idle MT3870

M2823 Crumb Pan, Drive MT3870

80 M6167 Crumb Pan, Drive MT3870

M6910 Crumb Pan, Idle MT3855G

M6906 Crumb Pan, Drive MT3855G

M5612 Plug Assy., Lower RH MT3870

81 M7276 Plug Assy., Lower RH MT3870

82 M5612 Plug Assy., Lower LH MT3870

M7386 Plug Assy., Lower MT3855G

83 M3116 Plug Assy., Upper MT3870 &

84 M2460 Air Curtain, Upper End Plug

M3728 Support Assy., Upper End Plug

M3729 Support Assy., Upper End Plug

M7149 M7150

85 M3724 Handle, End Plug (Qty 2)

22229 Stacking Assy., Double (Qty 1)

M4633 Panel & Filter Assy. (Qty 1)

Description

(LaRosa's) (Qty 1)

(Qty 1) (Before 9/15/95)

(Qty 1) (After 9/15/95)

(Qty 1) (Before 9/15/95)

(Qty 1) (After 9/15/95)

(Qty 1)

Qty 1) (Before 9/15/95)

(Qty 1) (After 9/15/95)

(Qty 1)

(Qty 2)

MT3855G (Qty 2)

(Qty 2)

RH MT3870 (Qty 2)

LH MT3870 (Qty 2)

Support Assy., Upper End Plug RH MT3855G (Qty 2) Support Assy., End Plug LH MT3855G (Qty 2)

MT3870 (All) & MT3855G (Before 11/14/95)

1-7

Ref.

Part

No.

No. Description

Ref.

Part

No.

No. Description

INTRODUCTION

M5485 Panel & Filter Assy. MT3855G

(Qty 1) (After 11/14/95)

XXXXX Control Box Cover w/ Louvers

MT3855G (Qty 1) (Before 11/14/95)

M6799 Control Box Cover w/ Access

Door MT3855G (Qty 1) (After 11/14/95)

XXXXX Control Box Cover w/ Louvers

MT3870 (Qty 1) (Before 9/15/95)

86 M7266 Control Box Cover w/ Access

Door MT3870 (Qty 1) (After 9/15/96)

87 M6035 Latch, Access Door (Qty 1)

M2689 Body Back, MT3870 (Qty 1)

(Before 9/15/95)

M7254 Body Back, MT3870 (Qty 1)

(After 9/15/95)

M4248 Body Back, MT3855G (Qty 1)

1-8

MT3870

EXCLUSIVE TO EXPORT

NOTE:  = ASAP Distributor Required Stocking Parts

Ref. No.

88 M2276 Burner Assy., Complete

89 M4597 Motor & Blower Assy., CW

90 M4598 Motor & Blower Assy., CCW

91 M6000 Dual Solenoid/Pressure

91 M6001 Dual Solenoid/Pressure

92 M7283 Blower, Cooling Export (Qty 1)

93 M3128 Motor, Conveyor Drive

94 M3153 Digital Speed Control Board,

95 M2630 Fuse, Line, Bodine Board, 500

96  M2316 Fuse, Armature, Bodine

97 M7282 Board, Relay (Closed Loop)

98 M6025 Fuse, 25V 80 ma (Qty 1)

99 M6024 Transformer, 220V to 24V

100  20350 Buzzer, 240V (Qty 1)

101 R1580 Stop, End (Qty 1)

102 M6449 Filter, Noise (Qty 1) CE

103 M7880 Computer Control Kit, Closed

104 M7888 Relay, 1 Second Time Delay

105 M2386 Blower Motor, Combustion

106 M7333 Pilot Burner & Ignitor Assy.,

106 M7334 Pilot Burner & Ignitor Assy.,

107 M2497 Switch, Push Button (Qty 1)

Part No.

M5717 Board, Relay (Open Loop) SB

Description

(Qty 1)

MT3870 (Qty 2)

Regulator, Nat. (Qty 1)

Regulator, LP (Qty 1)

Bodine, 180V (Qty 1)

Bodine (Qty 1)

MA (Qty 1)

Board, 200 MA, 250V (Qty 1)

(Qty 1)

SB (Qty 1)

(Qty 1)

Loop SB (Qty 1) CE

(Qty 1) CE

LP (Qty 1) CE

Nat. (Qty 1) CE

Ref. No.

108 M2498 Switch, Contact (Qty 1) CE

109 M3330 Switch, Air Pressure DifferenĆ

110 M0706 Orifice, Main Burner (Specify

111 R0164 Terminal Block, Power (Qty 2)

112 R0166 Terminal Block, Ground

113  M3168 Spark Box, 240V (Landis &

114  M2247 Contactor, 240V, 50 HZ (Qty 1)

115 XXXXX Indicator Light (Qty 2) CE

116 16037 Indicator Light, 250V, Red,

117 16775 Relay, SPST, 240V, 30 Amp.

118 M3172 Timer, Fixed, 2 Second (Qty 1)

119 M3173 Timer, Fixed, 10 Second (Qty

120 M6029 Connector, Liquid Tight (Qty

121 10809 Nipple, Pipe 1/2 x 2 (Qty 1)

122 M2835 Fitting, Elbow 90 Street 1/8"

123 M3443 Bushing, Adapter (Qty 2) CE

124 M2841 Fitting, Pressure Tap (Qty 2)

Part No.

M2819 Switch, Air Pressure (in/wc)

18265 Indicator Light, 28V, Red,

M6589 Plate Assy., Control SB (Qty 1)

M7323 Plate Assy., Control SB Qty 1)

M6982 Piping Assy. (Qty 1) CE

Description

tial (mbr) (Qty 1) CE

(Qty 1) Australia

MTD) (Qty 1) CE

(Qty 1) CE

Gyr) (Qty 1) CE

Round (Qty 1) CE

Round (Qty 1) CE & Australia

(Qty 1) CE

1) CE

Australia

1) CE

(Qty 1) CE

1-9

INTRODUCTION

MT3870 DOMESTIC & GENERAL EXPORT CONTROL BOX

(Control Plate and/or Gas Burner Components not Shown)

1-10

MT3870

MT3870 CE CONTROL BOX

(Control Plate and/or Gas Burner Components not Shown)

1-11

MT3870 DOMESTIC GAS BURNER COMPONENTS

(Control Box not Shown)

INTRODUCTION

1-12

MT3870

MT3870 CE GAS BURNER COMPONENTS

(Control Box not Shown)

1-13

INTRODUCTION

MT3870 DOMESTIC & GENERAL EXPORT SB CONTROL PLATE ASSY

(M6590)

1-14

+ 48 hidden pages