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 [phone] Fax: [phone]

PN M7489 Rev B (6/01)

E 1996 - G.S. Blodgett Corporation All rights reserved.

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 low)limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . 4-1
	Regulated Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . 4-2
	Computer Control Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . 4-3
	Temperature Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . 4-5

i

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

ii

Literature Addendum

Operation - Cooking Computer without Conveyor Control

NOTE: This addendum applies to tandem ovens only.

CONTROL DESCRIPTION
1.	DIGITAL DISPLAY - Displays the time, tem)		NOTE:
	perature and controller related information.
2.	OVEN ON/OFF - Controls power to the		This oven, supplied with remote
			control, is equipped with an emer:
	oven.
3.	NUMERIC KEYS - Used to enter numerical		gency shut down switch.
	data in the programming mode.		Should you need to stop the heat
4.	CLEAR KEY - Used to clear the display if an		press the emergency switch.
	error is made in the programming mode.		WARNING:
5.	SET TEMP KEY - Used to view or program
			Do not use the emergency switch as
	the temperature setpoint.
6.	ACT TEMP KEY - Used to view the current		a GENERAL on/off switch!
	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.

			1
			2
8
			3
7	6	5	4

??????

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 dis) play reads OFF when the oven is idle.

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

TIME D 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 comput) 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 AC" TUAL D 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 D

TEMP D nnnn_F.

To turn the oven off:

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

OVEN SHUT:DOWN

Turn the Computer Controller off (press and mo) 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 blow) er motor(s) will then automatically shut off.

COOL:DOWN CIRCUIT

Blodgett Masterthermr conveyor ovens are equipped with a cool)down 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 blow) 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 emer: 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!

2	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 PROG"? D SET D TEMP"? D _ _ _ __F.

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

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

5.Press the PROGRAM/ENTER key (8) a sec) ond time to lock)in 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 comput) er's memory.

3.The display will flash WAIT D LOW D SET D TIME D 0 until the programmed bake temper) ature is reached. The HEAT lamp (9) will re) main lit until the oven reaches the tempera) 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

DWAIT D LOW - indicates that the present oven temperature is lower than the set point tem) perature. When the oven reaches the set point temperature the display changes to

READY.

DREADY - indicates that the oven is ready to accept product.

DSET D TIME D 0 - indicates the current cook time setting.

DHIGH D TIME - indicates that the temperature is well above the set point. This usually occurs when moving from a higher toG a lower temper) ature. Wait until the display reads ready be) fore loading product.

DHIGH D TEMP D 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.

DHIGH D TEMP D PANEL - indicates that the control area reaches an excessive tempera) ture. Shut the oven off and wait for the unit to cool down.

DPROBE D OPEN D PROBE D 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 emer: 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 adja) 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	1200)1650	2400)3300	3600)5000
M3/min	34 ) 47	68)93	102)142

TABLE 1

Installations within the U.S.

The MT3870 requires a 15 Amp, 60HZ, 1F, 208)240VAC, 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 cir) cuit breaker should disconnect all poles, including neutral with a contact separation of at least 3 mm.

ELECTRICAL SPECIFICATIONS

NOTE: Three Phase hookup is not permitted.

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

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.

	L1				L1
	N	120
			208)240		N	220)230
				Supply			Oven
Supply	L2	120	Oven

U.S. Installations	Export Installations

2)4)92

L3

L2

L1

N

Blodgett		N		2	s	A1
Connector		L
		Connector	1	A2
			2
				Fan		Relay A
2	Air Pressure Regulator					1
1	Burner Control Solenoid

CE Approved Installations

FIGURE 1

1-1

INTRODUCTION

GAS SPECIFICATIONS

GAS CONNECTIONS

Domestic and General Export installations

The gas line should be large enough to accommo) 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 con) 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), con" sult the factory.

CE approved installations

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

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 me" 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.

DOMESTIC AND GENERAL EXPORT

		Natural Gas					Propane Gas
Gas Line Sizing
Single			3/4" line					3/4" line
Double			1)1/4" line					1I line
Triple			1)1/4" line					1)1/4" line
Orifice Size		#1					#29
Incoming Gas Pressure	W.C.		kPa		mbar	W.C.		kPa		mbar
Static	7"		1.74		17.4	12.5"		3.11		31.1
Operational	5.5"		1.36		13.7	11"		2.73		27.4

CE APPROVED UNITS

Type of	Inlet	Burner Pressure	Injector	Air	Pilot	Standard
Gas	Pressure	mbars	Diameter	Opening	Injector	Delivery
	mbars		mm	mm	mm	Value kW (HS)
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	5,15	16	2 x 0,63	46 Nat. Gas
		Pressure Regulator
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

TABLE 2

1-2

MT3870

ILLUSTRATED PARTS LISTS

ELECTRICAL COMPONENTS

NOTE: n = ASAP Distributor Required Stocking Parts

Ref.	Part		Ref.	Part
No.	No.	Description	No.	No.	Description
1	n M6474	Computer Control Kit, Closed	8	n M3295	Thermostat, High Limit
		Loop SB (Qty 1)			(Manual Reset) (Qty 1)
1	n FW525	Computer Control Kit, Closed	9	n M1362	Snap Disc, L140/20F, 2 Pole
		Loop SB (Qty 1)			SPST (Qty 1)
		(Reconditioned)		n M2453	Snap Disc, L140/20F, 3 Pole
	M5635	Computer Control Kit, Open
					SPDT (Qty 1)
		Loop TB (Qty 1)	10	n M0595	Switch, Air Pressure SPDT
	M3175	Decal, Lexan Control (Qty 1)
					(Qty 1)
	n M7427	Probe, Temperature RTD, 500	11	n M0152	Contact, Emergency Stop
		OHMS (Qty 1)
					Switch (Qty 1)
	M7202	Conversion Kit, Open Loop to	12	M3296	Activator, Emergency Stop
		Closed Loop (Qty 1)
					Switch (Mushroom Shape)
	M3347	Cable, Computer Control, 25			(Qty 1)
		Pin, 10' (Qty 1)		M3297	Nameplate, Emergency Stop
	n M3348	Cable, Computer Control, 9			(Qty 1)
		Pin, 10' (Qty 1)	13	M0593	Terminal Block, 2 Pole (Qty 1or
	M3490	Cable, Computer Control, 25
					CE Qty 2)
		Pin, 50' (Qty 1)		n M2469	Fan, Axial 110 CFM 4 1/2" (Qty
	M3491	Cable, Computer Control, 9
					4) (Before 11/14/95)
		Pin, 50' (Qty 1)		22718	Fan Guard & Hardware (Qty 3)
	n M3349	Harness, Inter-Connecting DC
					(Before 11/14/95)
		Drive, 3-Wire (For 9 Pin)
				n M0572	Cord, Axial Fan 30" Power (Qty
		(Qty 1)
					4) (Before 11/14/95)
	M3353	Harness, Relay Board
			14	n M6381	Blower, Cooling (Qty 1) (After
		(Open Loop) (For 25 Pin)
					11/14/95)
		(Qty 1) (Before 9/15/95)
	M7237	Harness, Relay Board (Closed	15	n M3136	Breaker, 7 AMP Circuit (Qty 4)
		Loop) (For 25 Pin) (Qty 1)	16	n M2772	Breaker, 4 AMP Circuit (Qty 2)
		(After 9/15/95)		M6590	Plate Assy., Control SB (Qty 1)
2	M3314	Bracket, Computer Wall (Qty 1)
				M7482	Plate Assy., Control TB (Qty 1)
	M5661	Bracket Assy., Cable Clamp
				M1694	Cord Set & Plug Assy., 10 Foot
		(Qty 1)
					(Qty 1)
3	n M0984	Pick Up, PV-2 (Qty 1) (After
				M0772	Receptacle, Twist Lock (Qty 1)
		9/15/95)
4	M7236	Board, Relay/Transformer	17	n M0708	Contactor, 3 Pole, 120V Coil
		(Qty 1)			(Qty 1)
5	n 22672	Relay, Control (Qty 4)	18	n M3322	Hood Interlock, Mechanical
					(Qty 1)

6n M3352 Transformer, 120V to 24V

(Qty 1)

7n 20349 Buzzer, 120V (Qty 1)

1-3

INTRODUCTION

CONVEYOR COMPONENTS

NOTE: n = ASAP Distributor Required Stocking Parts * = Item is Too Large for UPS

	Ref.		Part		Ref.	Part
	No.		No.	Description	No.	No.	Description
	19		M6338	Belt, Wire S/S (Total Length		* M4433	Conveyor (Qty 1) Assy., Idle SB
				38" SB (Per Foot) MT3870 18			MT3855G (Before 11/14/95)
				FT, MT3855 16 FT)		* M6777	Conveyor MT3855G Assy.,
			M7889	Belt, Wire S/S (Total Length			Folding (Drive & Idle) SB (Qty
				18-1/2" TB (Per Foot)			1) (After 11/14/95)
				MT3870 18 FT)	29	M2672 Shaft, Conveyor Drive (Qty 1)
	20		M7272	Tensioner (After Assy., Belt	30	M2673 Shaft, Conveyor Idle (Qty 1)
				MT3870 (Qty 2) 9/15/95)
					31	nM0109 Sprocket, Motor Drive, 12 Tooth
	21	nM2379		Speed Control Board, Bodine
							(Qty 1)
				(Qty 1)
						nM0110 Sprocket, Conveyor Drive, 15
		nM2254		Fuse, Line, 22 Bodine Board, 5
							Tooth (Qty 1)
				AMP, 125V (Qty 1)
					32	nM0108 Sprocket, Conveyor Belt, 11
		nM2316		Fuse, (Qty 1) 23 Armature,
							Tooth (Qty 18)
				Bodine Board, 200 MA, 250V
	24		M3301	Capacitor, (SB Qty 1 or Speed
				Control Board TB Qty 2)
	25	nM2378		Motor, (SB Qty 1 or Conveyor
				Drive, Bodine 130V TB Qty 2)
		nM2500		Brush Set, Bodine (Qty 1)
			M0391	Chain, Drive & Order (SB Spec)
				ify 2 FT or TB Specify 4 FT
				M0112)
		nM0112		Masterlink, Drive Chain (Qty 1)
			M6791	Guard, Drive 26 Chain SB (Qty
				1)
			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)

1-4

MT3870

CONVECTION COMPONENTS

NOTE: n = ASAP Distributor Required Stocking Parts

Ref.	Part		Ref.	Part
No.	No.	Description	No.	No.	Description
33	nM4224	Motor & Blower Assy. CW		M1962	Hold Down, Nozzle MT3870
		MT3870 (Qty 2)			(Qty 1) (Before 9/15/95)
34	nM4225	Motor & Blower Assy. CCW		M7399	Hold Down, Nozzle MT3870
		MT3870 (Qty 2)			Qty 1) (After 9/15/95)
	M5419	Motor & Blower Assy. CCW		M5486	Hold Down, Nozzle MT3855G
		MT3855G (Qty 3) (After			(Qty 1) (Before 11/14/95)
		2/27/94)		M7380	Hold Down, Nozzle MT3855G
	M2564	Capacitor, Motor MT3870			(Qty 1) (After 11/15/95)
		(Qty 4)	36	M3106	Diverter, Air (LH & RH) MT3870
NOTE: Call factory if MT3855G oven was					(Qty 2)
	manufactured before 2/27/94 to verify			M3106	Diverter, Air (LH & RH)
	motor part number.
					MT3855G (Qty 2) (Before
	nM5722	Insulation Kit for Blowers			11/14/95)
		MT3870 (Qty 1)		M5179	Diverter, Air (LH & RH)
	M7991	Insulation Kit for Blowers			MT3855G (Qty 2) (Before
		MT3855G (Qty 1)			11/14/95)
35	M6466	Nozzle Assy. w/ Diverter		M5453	Diverter, Air (Center) MT3855G
		MT3870 (Qty 14) Generic			(Qty 1)(Before 11/14/95)
	M5466	Nozzle Assy. w/ Diverter		M7372	Diverter, Air (LH) MT3855G
		MT3855G (Qty 12) (Before			(Qty 1) (After 11/14/95)
		11/14/95)			(See L-495 & L-496)
	M7105	Nozzle Assy. w/ Diverter		M7374	Diverter, Air (RH) MT3855G
		MT3855G (Qty 6) (After			(Qty 1) (After 11/14/95)
		11/14/95) (See L-497)			(See L-495 & L-496)
	M7106	Nozzle Assy. w/ Diverter		M7373	Diverter, Air (Center) MT3855G
		MT3855G (Qty 6)			(Qty 1) (After 11/14/95)
		(After 11/14/95) (See L-497)			(See L-495 & L-496)
AIR PLATES
NOTE: n = ASAP Distributor Required Stocking Parts
Ref.	Part		Ref.	Part
No.	No.	Description	No.	No.	Description
37	M6470	Plate Assy., Air RH MT3870		M5649	Plate Assy., Air LH (L to R)
		Generic (Qty 1)			MT3855G Generic (Qty 1)
38	M6469	Plate Assy., Air LH MT3870		24613	Hook, Air Pan (Qty 1)
		Generic (Qty 1)	39	M6597	Plate Assy., Block Off MT3870
	M5767	Plate Assy., Air RH (R to L)			Generic (Qty 6)
		MT3855G Generic (Qty 1)		M6079	Plate Assy., Block Off MT3855G
	M5768	Plate Assy., Air LH (R to L)			Generic (Qty 6)
		MT3855G Generic (Qty 1)
	M5648	Plate Assy., Air RH (L to R)
		MT3855G Generic (Qty 1)

1-5

INTRODUCTION

GAS BURNER COMPONENTS

NOTE: n = ASAP Distributor Required Stocking Parts

Ref.	Part		Ref.	Part
No.	No.	Description	No.	No.	Description
40	22132	Burner Assy. Complete (Specify	63	21278	Nipple, Pipe 1/2 x 3-1/2
		Model & Gas Type) (Qty 1)			(Qty 1)
41	nM0767	Blower Motor, Comb. w/ Con)	64	M3238	Tee, 1/2 x 1/2 x 1/4 (Qty 1)
		trol Box (Qty 1)	65	n23007	Spring, Solenoid Valve, LP to
42	nM2383	Blower Motor, Combustion			Natural (Qty 1)
		(Qty 1)	65	n18612	Spring, Solenoid Valve, Natural
43	nM2381	Transformer, 120V to 24V			to LP (Qty 1)
		(Qty 1)		23114	Conversion Kit, LP to Natural
44	nM2382	Relay, Time Delay (Qty 1)			MT3870 (Qty 1)
45	M0454	Orifice, Main Burner LP (Qty 1)		n21389	Conversion Kit, Natural to LP
45	M0455	Orifice, Main Burner Natural			MT3870 (Qty 1)
		(Qty 1)		M5259	Conversion Kit, LP to Natural
46	nM2727	Pilot Burner & Igniter Assy. LP			MT3855G (Qty 1)
		(Qty 1)		M5290	Conversion Kit, Natural to LP
46	nM2726	Pilot Burner & Igniter Assy.			MT3855G (Qty 1)
		Natural (Qty 1)	66	nM0282	Valve, Manual Gas (Qty 1)
47	M6378	Shield, Pilot Burner (Qty 1)	67	nM5495	Dual Solenoid/Pressure Regu)
48	nM0415	Flame Sensor (Qty 1)			lator, Nat 24V (Qty 1)
49	nM2690	Orifice, Pilot LP (Qty 1)	67	n22190	Dual Solenoid/Pressure Regu)
					lator, LP 24V (Qty 1)
49	nM0697	Orifice, Pilot Natural (Qty 1)	68	nM1054	Spark Box, Johnson (Qty 1)
50	M0248	Tube, Pilot Aluminum 1/4"		21242	Connector Kit, Gas Flex 48"
		(1.583 Feet)
					(Qty 1)
51	M0959	Fitting, Compression 1/4		21826	Connector Kit, Gas Flex 36"
		(Qty 2)
					(Qty 1)
52	M2799	Union, Compression (Qty 1)	69	M7280	Flame Tube Assy., MT3870
53	21225	Fitting, Elbow (Qty 1)			(Qty 1)
54	4588	Nipple, Pipe 3/4 x 1-3/8 Close		M7390	Flame Tube Assy., MT3855G
		(Qty 3 or CE Qty 2)			(Qty 1)
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
		(Qty 1)

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

611949 Nipple, Pipe 1/2 x 1-3/16

	Close (Qty 1)
62	M0317 Elbow, 1/2 Inch Street 90 Deg
	(Qty 1)

1-6

MT3870

EXTERIOR COMPONENTS

NOTE: z = Doors are not returnable

Ref.	Part		Ref.	Part
No.	No.	Description	No.	No.	Description
	z M2868	Door Assembly, Pull Down S/S		M7575	Extension Assy., Product 15"
		(used w/enclosed Greenheck			(LaRosa's) (Qty 1)
		hood system) (Qty 1)		M2824	Crumb Pan, Idle MT3870
	M2188	Handle Kit, Door 2" (used			(Qty 1) (Before 9/15/95)
		w/M2868) (Qty 1)	79	M6168	Crumb Pan, Idle MT3870
70	z M3944	Door Assembly (used w/ false			(Qty 1) (After 9/15/95)
		front) (Qty 1)		M2823	Crumb Pan, Drive MT3870
71	M4275	Handle Kit, Door 22" (used w/			(Qty 1) (Before 9/15/95)
		M3944) (Qty 1)	80	M6167	Crumb Pan, Drive MT3870
72	M1871	Plate, RH Pivot Slotted (Qty 1)			(Qty 1) (After 9/15/95)
73	M1872	Plate, LH Pivot Slotted (Qty 1)		M6910	Crumb Pan, Idle MT3855G
74	M3602	Bracket Assy., Mounting (Qty 2)			(Qty 1)
				M6906	Crumb Pan, Drive MT3855G
75	M3603	Bracket Assy., Mounting (Qty 2)
					(Qty 1)
	M5475	Filter Assy., MT3855G (Qty 1)		M5612	Plug Assy., Lower RH MT3870
		(Before 11/14/ 95)
					Qty 1) (Before 9/15/95)
76	M3751	False Front Assy., MT3870	81	M7276	Plug Assy., Lower RH MT3870
		(Qty 1)
					(Qty 1) (After 9/15/95)
	M4563	False Front Assy., MT3855G	82	M5612	Plug Assy., Lower LH MT3870
		(Qty 1)
					(Qty 1)
	M3751	Tape, Closed Cell Foam		M7386	Plug Assy., Lower MT3855G
	M5032	Chimney Kit, Single (Qty 1)			(Qty 2)
		(Before 11/95)	83	M3116	Plug Assy., Upper MT3870 &
	M7464	Chimney Kit, Single (Qty 1)			MT3855G (Qty 2)
		(After 11/95)	84	M2460	Air Curtain, Upper End Plug
	M7160	Chimney Kit, Double (Qty 1)			(Qty 2)
		(Before 11/95)		M3728	Support Assy., Upper End Plug
	M7463	Chimney Kit, Double (Qty 1)			RH MT3870 (Qty 2)
		(After 11/95)		M3729	Support Assy., Upper End Plug
	21390	Legs, 17-1/4" w/ Casters			LH MT3870 (Qty 2)
		(Double) (Set of 4)		M7149	Support Assy., Upper End Plug
	21391	Legs, 23-1/4" w/ Casters		M7150	RH MT3855G (Qty 2) Support
		(Single) (Set of 4)			Assy., End Plug LH MT3855G
	14444	Casters, Cradle (Triple Oven)			(Qty 2)
		(Set of 4)	85	M3724	Handle, End Plug (Qty 2)
77	M3783	Stop, Product S/S (Qty 1)		22229	Stacking Assy., Double (Qty 1)
78	M3779	Extension Assy., Product 6"		M4633	Panel & Filter Assy. (Qty 1)
		(Qty 1)			MT3870 (All) & MT3855G
	M4223	Extension Assy., Product 10"			(Before 11/14/95)

(Qty 1)

1-7

					INTRODUCTION
Ref.	Part		Ref.	Part
No.	No.	Description	No.	No.	Description
	M5485	Panel & Filter Assy. MT3855G	86	M7266	Control Box Cover w/ Access
		(Qty 1) (After 11/14/95)			Door MT3870 (Qty 1)
	XXXXX Control Box Cover w/ Louvers				(After 9/15/96)
		MT3855G (Qty 1) (Before	87	M6035	Latch, Access Door (Qty 1)
		11/14/95)		M2689	Body Back, MT3870 (Qty 1)
	M6799 Control Box Cover w/ Access				(Before 9/15/95)
		Door MT3855G (Qty 1) (After		M7254	Body Back, MT3870 (Qty 1)
		11/14/95)
					(After 9/15/95)
	XXXXX Control Box Cover w/ Louvers			M4248	Body Back, MT3855G (Qty 1)
		MT3870 (Qty 1) (Before
		9/15/95)

1-8

MT3870

EXCLUSIVE TO EXPORT

NOTE: n = ASAP Distributor Required Stocking Parts

Ref.	Part		Ref.	Part
No.	No.	Description	No.	No.	Description
88	M2276	Burner Assy., Complete	108	M2498	Switch, Contact (Qty 1) CE
		(Qty 1)	109	M3330	Switch, Air Pressure Differen)
89	M4597	Motor & Blower Assy., CW			tial (mbr) (Qty 1) CE
		MT3870 (Qty 2)		M2819	Switch, Air Pressure (in/wc)
90	M4598	Motor & Blower Assy., CCW			(Qty 1) Australia
		MT3870 (Qty 2)	110	M0706	Orifice, Main Burner (Specify
91	M6000	Dual Solenoid/Pressure			MTD) (Qty 1) CE
		Regulator, Nat. (Qty 1)	111	R0164	Terminal Block, Power (Qty 2)
91	M6001	Dual Solenoid/Pressure			CE
		Regulator, LP (Qty 1)	112	R0166	Terminal Block, Ground
92	M7283	Blower, Cooling Export (Qty 1)			(Qty 1) CE
93	M3128	Motor, Conveyor Drive	113	nM3168	Spark Box, 240V (Landis &
		Bodine, 180V (Qty 1)			Gyr) (Qty 1) CE
94	M3153	Digital Speed Control Board,	114	nM2247	Contactor, 240V, 50 HZ (Qty 1)
		Bodine (Qty 1)			CE
95	M2630	Fuse, Line, Bodine Board, 500	115	XXXXX	Indicator Light (Qty 2) CE
		MA (Qty 1)		18265	Indicator Light, 28V, Red,
96	nM2316	Fuse, Armature, Bodine			Round (Qty 1) CE
		Board, 200 MA, 250V (Qty 1)	116	16037	Indicator Light, 250V, Red,
	M5717	Board, Relay (Open Loop) SB			Round (Qty 1) CE & Australia
		(Qty 1)	117	16775	Relay, SPST, 240V, 30 Amp.
97	M7282	Board, Relay (Closed Loop)			(Qty 1) CE
		SB (Qty 1)	118	M3172	Timer, Fixed, 2 Second (Qty 1)
98	M6025	Fuse, 25V 80 ma (Qty 1)			CE
99	M6024	Transformer, 220V to 24V	119	M3173	Timer, Fixed, 10 Second (Qty
		(Qty 1)			1) CE
100	n20350	Buzzer, 240V (Qty 1)		M6589	Plate Assy., Control SB (Qty 1)
101	R1580	Stop, End (Qty 1)			CE
102	M6449	Filter, Noise (Qty 1) CE		M7323	Plate Assy., Control SB Qty 1)
					Australia
103	M7880	Computer Control Kit, Closed		M6982	Piping Assy. (Qty 1) CE
		Loop SB (Qty 1) CE
104	M7888	Relay, 1 Second Time Delay	120	M6029	Connector, Liquid Tight (Qty
					1) CE
		(Qty 1) CE
105	M2386	Blower Motor, Combustion	121	10809	Nipple, Pipe 1/2 x 2 (Qty 1)
					CE
		(Qty 1) CE
106	M7333	Pilot Burner & Ignitor Assy.,	122	M2835	Fitting, Elbow 90 Street 1/8"
					(Qty 1) CE
		LP (Qty 1) CE
106	M7334	Pilot Burner & Ignitor Assy.,	123	M3443	Bushing, Adapter (Qty 2) CE
		Nat. (Qty 1) CE	124	M2841	Fitting, Pressure Tap (Qty 2)
107	M2497	Switch, Push Button (Qty 1)			CE

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

INTRODUCTION

MT3870 DOMESTIC GAS BURNER COMPONENTS

(Control Box not Shown)

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