Blodgett MARK V Installation Manual

MARK V SERIES

CONVECTION OVEN

SERVICE AND REPAIR MANUAL

BLODGETT OVEN COMPANY

www.blodgett.com

44 Lakeside Avenue, Burlington, Vermont 05401 USA Telephone [phone] Fax: [phone]

PN 33144 Rev F (7/02)

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

E 2002 --- G.S. Blodgett Corporation All rights reserved.

TABLE OF CONTENTS

1. INTRODUCTION

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

2. OPERATION

Sequence of Operations 2---1...........................................................

Cook Only --- 18459 Rev D 2--- 1.....................................................

CE Approved Cook Only --- 33339 Rev C 2--- 3.........................................

Cook a nd Hold --- 18791 2--- 5.......................................................

Solid State Digital --- 30070 Rev B 2--- 8...............................................

CE Approved Solid State Digital --- 33345 Rev C 2--- 10..................................

Fan Delay with Pulse Plus --- 18466 Rev D 2--- 12........................................

Humidaire --- 1846 Rev M 2--- 14......................................................

Intellihold and Intelliplus --- 22027 Rev A 2--- 17.........................................

Intellitouch --- 19361 Rev A 2--- 19.....................................................

Blodgett I Q Control --- 33078 Rev A 2--- 21..............................................

3. CALIBRATION AND ADJUSTMENT

Doors 3 --- 1...........................................................................

Door Blower Switch 3 --- 2...............................................................

Thermostat 3 --- 2......................................................................

Solid State Manual 3 --- 4................................................................

Solid State Digital Control 3--- 6..........................................................

Intellihold and Intelliplus Controls 3--- 7...................................................

Intellitouch Control 3 --- 8................................................................

Intellitouch II Control 3 --- 9..............................................................

Blodgett IQ Control 3 --- 1 0...............................................................

Probe Resistance vs Heating Elements 3--- 12..............................................

ProbeResistancevsTemperature 3---12..................................................

4. TROUBLESHOOTING

Heat System 4 --- 1.....................................................................

Display Error Codes 4 --- 3..............................................................

Intellitouch 4 --- 3...................................................................

Intellihold and Intelliplus 4--- 3.......................................................

Blodgett IQ Control 4 --- 3............................................................

i

TABLE OF CONTENTS

5. PARTS REPLACEMENT

Door Assembly 5 --- 1...................................................................

Door 5 --- 1........................................................................

Door Arm Support Assembly 5--- 1...................................................

Window Assembly 5 --- 2............................................................

Compartment Liner Bottom 5--- 2........................................................

Motor and Blower Assembly 5--- 3.......................................................

Blower Wheel 5 --- 3.................................................................

Motor 5 --- 3........................................................................

Electrical Components 5 --- 4............................................................

Bulb and Capillary Thermostat 5--- 4..................................................

Electrical Components Located in the Control Module 5--- 4.............................

Door Switch 5 --- 4..................................................................

ii

CHAPTER 1

INTRODUCTION

MARK V

OVEN SPECIFICATIONS

ELECTRICAL SPECIFICATIONS

Installations within the U.S. and Canada

Single phase models require a 60 Hz,
208/240VAC, 3 wire service consisting of L1, L2
and ground. Three phase models require a 60 Hz,
208/240/440/480, 4 wire service consisting of L1,
L2, L3 and ground. Wiring from the power source
to any of the single phase units must be a minimum
of #6 AWG copper stranded wire. Wiring from the
power source to the 208/240 three phase units
must be a minimum of #8 AWG copper stranded
wire. Wiring from the power source to the 440/480
three phase units must be a minimum of #12 AWG
copper stranded wire.

ELECTRICAL SPECIFICATIONS (per section)

KW Hz Vol ts Phase

U.S. and Canadian installations

11.0 60 208 1 51 --- 51 --- 6AWG

11.0 60 208 3 31 29 29 --- 8AWG

11.0 60 220-240 1 44 --- 44 --- 6AWG

11.0 60 220-240 3 26 24 24 --- 8AWG

11.0 60 440 3 15 14 14 --- 12 AWG

11.0 60 480 3 14 13 13 --- 12 AWG

General Export installations

11.0 50 208 3 18 18 18 4 Size per local code

11.0 50 220-240 1 48 --- --- 48 Size per local code

11.0 50 220/380 3 18 16 16 2 Size per local code

11.0 50 240/415 3 18 14 14 4 Size per local code

11.0 50 230/400 3 18 15 15 3 Size per local code

CE installations

11.0 50 400 3N 18 15 15 3 Size per local code

General Export Installations

Single phase models require a 50 Hz,
220/240VAC, 3 wire service consisting of L1, L2
and ground. Three phase models require a 50 Hz,
415/240 or 380/220 VAC, 5 wire service consisting
of L1, L2, L3, neutral and ground. Use 90_Cwire
and size according to local codes.

CE approved installations

Single phase models require a 50 Hz, 230VAC 3
wire service consisting of L1, neutral and ground.
Three phase models require a 50 Hz, 400/230VAC,
5 wire service consisting of L1, L2, L3, neut ral and
ground. Use 90_C wire and size according to local
codes.

Amps

L1 L2 L3 N

Electrical Connection

(minimum size)

1 --- 1

CHAPTER 2

OPERATION

MARK V

SEQUENCE OF OPERATIONS

NOTE: The following instructions represent the most common controllers. For questions regarding other

options call the Blodgett Service Department at [phone].

COOK ONLY --- 18459 REV D

Component Reference

NOTE: Refer to FIGURE 1 page 2 --- 2 for compo-

nent locations.

1. MODE SELECTOR SWITCH

2. COOK TIMER

3. DOOR SWITCH

4. TEMPERATURE CONTROL BOARD

5. AXIAL FAN

6. CONV ECTION FAN MOTOR

7. TEMPERATURE PROBE

8. SOLID STATE POTENTIOMETER

9. CENTRIFUGAL SWITCH

10. COOK LIGHT

11. ELEMENT CONTACTOR

12. HEATING ELEMENTS

13. 50 WATT LAMPS

14. LIGHT SWITCH

15. TIMER MOTOR

16. BUZZER

Operation

1. Turn the mode selector switch (1) to the cook
position. Power goes to terminal #1 of the
cook timer (2), one side of the door switch (3),
terminal #8 of the temperature control board
(4) and the axial fan (5).

2. If the doors are closed the door switch (3)
should also be closed sending power to termi­nal #6 of the temperature control board (4)
and to the convection fan motor (6).

NOTE: This motor has a built in centrifugal

switch (9) that closes when the motor
reaches full speed. If found faulty do
not bypass, the whole motor should be
replaced.

temperature control board (4) and the
solid state potentiometer (8).

Power is sent out of terminal #7 to one side of
the centrifugal switch (9). If the convection fan
motor (6) is at full speed the centrifugal switch
(9) closes sending power to the cook light (10)
and one side of the element contactor (11).
When the contactor closes the heating ele­ments (12) power up.

4. The 50 watt lamps (13) only receive power when
the light switch (14) is activated. These lamps
are 115 vol t and are wired in series parallel.

5. When the cook timer (2) is set for a time a cir­cuit is made between terminals #1 and #2
powering up the timer motor (15). At the expi­ration of the set time the switch in the cook tim­e r ( 2 ) t o g g l e s f r o m 1 --- 2 t o 1 --- 4 p o w e r i n g u p
the buzzer (16).

NOTE: Put the timer in the home position to si-

lence the buzzer.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This
allows the convection fan motor to operate
even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be
changed due to the difference in amp
draw. Reference detail inset in FIGURE 1.

NOTE: The resistive values for the probes used in

this oven have descending temperature
coefficients. As the temperature increases
the resistive values decrease.

NOTE: Reference page 4 ---2 of the Troubleshoot-

ing section for the resistive values of the
heating elements. The reading should be
taken in a cold state.

3. On a call for heat from the temperature control
circuit, a circuit is completed between termi­nals #6 and #7 of the temperature control
board (4).

NOTE: The temperature control circuit con-

sists of the temperature probe (7), the

2 --- 1

13

OPERATION

10

5

11

12

14

6

FIGURE 1

9

8

16

4

7

1

15

2

3

2 --- 2

MARK V

CE APPROVED COOK ONLY --- 33339 REV C

Component Reference

NOTE: Refer to FIGURE 2 page 2 --- 4 for compo-

nent locations.

1. MODE SELECTOR SWITCH

2. COOK TIMER

3. DOOR SWITCH

4. TEMPERATURE CONTROL BOARD

5. AXIAL FAN

6. CONVECTION FAN MOTOR

7. TEMPERATURE PROBE

8. SOLID STATE POTENTIOMETER

9. CENTRIFUGAL SWITCH

10. HIGH LIMIT SWITCH

11. ELEMENT CONTACTOR

12. COOK LIGHT

13. HEATING ELEMENTS

14. 50 WATT LAMPS

15. LIGHT SWITCH

16. TIMER MOTOR

17. BUZZER

Operation

1. Turn the mode selector switch (1) to the cook
position. Power goes to terminal #1 of the
cook timer (2), one side of the door switch (3),
terminal #8 of the temperature control board
(4) and the axial fan (5).

2. If the doors are closed the door switch (3)
should also be closed sending power to termi­nal #6 of the temperature control board (4)
and to the convection fan motor (6).

Power is sent out of terminal #7 to one side of
the centrifugal switch (9). If the convection fan
motor (6) is at full speed the centrifugal switch
(9) closes sending power to one side of a high
limit switch (10), if the high limit is closed then
power will be sent to one side of the contactor
(11) and an indicator light (12). When the con­tactor closes the heating elements (12) power
up.

4. The 50 watt lamps (13) only receive power when
the light switch (14) is activated.

5. When the cook timer (2) is set for a time a cir­cuit is made between terminals #1 and #2
powering up the timer motor (15). At the expi­ration of the set time the switch in the cook tim­e r ( 2 ) t o g g l e s f r o m 1 --- 2 t o 1 --- 4 p o w e r i n g u p
the buzzer (16).

NOTE: Put the timer in the home position to si-

lence the buzzer.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This
allows the convection fan motor to operate
even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be
changed due to the difference in amp
draw. Reference detail inset in FIGURE 2.

NOTE: Reference page 4 ---2 of the Troubleshoot-

ing section for the resistive values of the
heating elements. The reading should be
taken in a cold state.

NOTE: This motor has a built in centrifugal

switch (9) that closes when the motor
reaches full speed. If found faulty do
not bypass, the whole motor should be
replaced.

3. On a call for heat from the temperature control
circuit, a circuit is completed between termi­nals #6 and #7 of the temperature control
board (4).

NOTE: The temperature control circuit con-

sists of the temperature probe (7), the
temperature control board (4) and the
solid state potentiometer (8).

2 --- 3

13

OPERATION

15

14

11

8

17

4

6

2

7

1

5

3

12

10

9

FIGURE 2

2 --- 4

MARK V

COOK AND HOLD --- 18791

Component Reference

NOTE: Refer to FIGURE 3 page 2 --- 7 for compo-

nent locations.

1. MODE SELECTOR SWITCH

2. COOK TIMER

3. COOK TEMPERATURE CONTROL BOARD

4. HOLD TEMPERATURE CONTROL BOARD

5. AXIAL FAN

6. DPDT RELAY COIL

7. DOOR SWITCH

8. CONV ECTION FAN MOTOR

9. TEMPERATURE PROBE

10. SOLID STATE POTENTIOMETER

11. CENTRIFUGAL SWITCH

12. COOK LIGHT

13. ELEMENT CONTACTOR

14. HEATING ELEMENTS

15. TIMER MOTOR

16. BUZZER

17. COOK AND HOLD TIMER

18. COOK AND HOLD LIGHT

19. TEMPERATURE PROBE

20. SOLID STATE POTENTIOMETER

21. 50 WATT LAMPS

22. LIGHT SWITCH

Cook Operation

1. Turn the mode selector switch (1) to the cook
position. Power goes to terminal #1 of the
cook timer (2), terminals #6 and #8 of the cook
temperature control board (3), terminal #8 of
the hold temperature control board (4) and the
axial fan (5). Power is also applied to the N.C.
set of contacts in a DPDT relay (6).

NOTE: The coil of this relay will only be acti-

vated when the hold timer is set.

2. If the doors are closed the door switch (7)
should also be closed sending power to termi­nal #3 of the mode selector switch (1). The
mode selector switch should already be made
between terminals #3 and N completing the
circuit to the convection fan motor (8).

NOTE: This motor has a built in centrifugal

switch (11) that closes when the motor

reaches full speed. If found faulty do
not bypass, the whole motor should be
replaced.

3. On a call for heat from the cook temperature
control system a circuit is completed between
terminals #6 and #7 of the temperature con ­trol board (3).

NOTE: The temperature control system con-

sists of the temperature probe (9), the
temperature control board (3) and the
solid state potentiometer (10)

Power is sent out of terminal #7 to the N.C. ter­minal of the DPDT relay (6). This relay should
be made between the N.C. t erminal and the
common terminal s ending power to one side
of the centrifugal switch (11). If the convection
fan motor (8) is at full speed the centrifugal
switch (11) closes sending power to the cook
light (12) and one side of the element contactor
(13). When the contactor closes the heating
elements (14) power up.

4. When the cook timer (2) is set for a time a cir­cuit is made between terminals #1 and #2
powering up the timer motor (15). At the expi­ration of the set time the switch in the cook tim­e r ( 1 5 ) t o g g l e s f r o m 1 --- 2 t o 1 --- 4 p o w e r i n g u p
the buzzer (16).

NOTE: Put the timer in the home position to si-

lence the buzzer.

5. The 50 watt lamps (21) only receive power when
the light switch (22) is activated. These lamps
are 115 vol t and are wired in series parallel.

Cook and Hold Operation

1. Turn the mode selector switch (1) to the cook
and hold position. Power goes to terminal #1
of the cook and hold timer (17). When the cook
and hold timer is set power goes to terminal #6
of the hold temperature controller (4), the coil
of the DPDT relay (6) and the cook and hold
light (18). When the DPDT relay powers up the
switches in the relay toggle from the N.C. to the
N.O. position.

2. On a call for heat from the hold temperature
control system, a circuit is completed beween
terminals #6 and #7 of the hold temperature
control board (4).

2 --- 5

OPERATION

NOTE: The hold temperature control system

consists of the temperature probe (19),
the hold temperature cont rol board (4)
and the solid state potentiometer (20).

PowergoestotheN.O.terminalsoftheDPDT
relay (6). Circuits should be made between the
N.O. and common terminals of the DPDT relay
(6) allowi n g power to run to the convection fan
motor (8) and one side of the centrifugal switch
(11). If the convection fan motor (8) is at full
speed the centrifugal switch (11) closes sending
power to the cook light (12) and one side of the
element contactor (13). When the contactor
closes the heating elements (14) power up.

NOTE: In cook and hold mode only, the con-

vection fan cycles on and off with the
hold thermostat system.

3. The 50 watt lamps (21) only receive power when
the light switch (22) is activated. These lamps
are 115 vol t and are wired in series parallel.

NOTE: The potentiometer and probes for cook

and cook & hold are identical. The cook
and cook & hold temperature boards are
NOT interchangeable.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This
allows the convection fan motor to operate
even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be
changed due to the difference in amp
draw. Reference detail inset in FIGURE 3.

NOTE: The resistive values for the probes used in

this oven have descending temperature
coefficients. As the temperature increases
the resistive values decrease.

NOTE: Reference page 4 ---2 of the Troubleshoot-

ing section for the reistive values of the
heating elements. The reading should be
taken in a cold state.

2 --- 6

MARK V

14

21

7

20

1

12

13

19

8

10

11

22

6

9

3

4

15

5

16

2

18

6

FIGURE 3

2 --- 7

17

1

SOLID STATE DIGITAL --- 30070 REV B

OPERATION

Component Reference

NOTE: Refer to FIGURE 4 page 2 --- 9 for compo-

nent locations.

1. MODE SELECTOR SWITCH

2. DOOR SWITCH

3. TIME AND TEMPERATURE CONTROLLER

4. AXIAL FAN

5. CENTRIFUGAL SWITCH

6. CONVECTION FAN MOTOR

7. HOT AIR ELEMENT CONTACTOR

8. HEATING ELEMENTS

9. TRANSFORMER

10. 50 WATT LAMPS

11. LIGHT SWITCH

Operation

1. Turn the mode selector switch (1) to the cook
position. Power goes to one terminal of the
door switch (2), terminal J8 of the temperature
controller (3), and the axial fan (4). The main
blower fan s tarts. If a temperature is pro­grammed into the controller, the power goes
from J9 to the centrifugal switch (5) in the con­vection fan motor (6).

2. If the doors are closed, the door switch (2)
should also be closed, sending power to the
common terminal of the time and temperature
controller (3). The relay on this controller
should be closed since a temperature has
been programmed into the controller. A circuit
is made between common and N.O. sending

power to, and starting the convection fan mo­tor (6).

NOTE: The relay in the time and temperature

controller is not field repairable. If
diagnosed as defective, the entire
board must be replaced.

3. When the convection fan motor (6) reaches full
speed the centrifugal switch (5) closes send­ing power to the coil of the hot air element con­tactor (7). When the contactor closes power is
sent to the heating elements (8).

4. The 50 watt lamps (10) only receive power when
the light switch (11) is activated. These lamps
are 115 vol t and are wired in series parallel.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This
allows the convection fan motor to operate
even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be
changed due to the difference in amp
draw. Reference detail inset in FIGURE 4.

NOTE: The resistive values for the probes used in

this oven have descending temperature
coefficients. As the temperature increases
the resistive values decrease.

NOTE: Reference page 4 ---2 of the Troubleshoot-

ing section for the reistive values of the
heating elements. The reading should be
taken in a cold state.

2 --- 8

MARK V

8

8

8

8

3

8

9

9

8

7

5

10

11

6

2

1

4

FIGURE 4

2 --- 9

CE APPROVED SOLID STATE DIGITAL --- 33345 REV C

OPERATION

Component Reference

NOTE: Refer to FIGURE 5 page 2 --- 11 for compo-

nent locations.

1. MODE SELECTOR SWITCH

2. DOOR SWITCH

3. TIME AND TEMPERATURE CONTROLLER

4. AXIAL FAN

5. CENTRIFUGAL SWITCH

6. CONVECTION FAN MOTOR

7. HIGH LIMIT SWITCH

8. HOT AIR ELEMENT CONTACTOR

9. HEATING ELEMENTS

10. 50 WATT LAMPS

11. LIGHT SWITCH

Operation

1. Turn the mode selector switch (1) to the cook
position. Power goes to one terminal of the
door switch (2), terminal J8 of the temperature
controller (3), and the axial fan (4). The main
blower fan s tarts. If a temperature is pro­grammed into the controller, the power goes
from J9 to the centrifugal switch (5) in the con­vection fan motor (6).

4. The 50 watt lamps (10) only receive power when
the light switch (11) is activated.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This
allows the convection fan motor to operate
even when the doors are open.

NOTE: The resistive values for the probes used in

this oven have descending temperature
coefficients. As the temperature increases
the resistive values decrease.

2. If the doors are closed, the door switch (2)
should also be closed, sending power to the
common terminal of the time and temperature
controller (3). The relay on this controller should
be closed since a temperature has been pro­grammed into the controller. A circuit is made
between common and N.O. sending power to,
and starting the convection fan motor (6).

NOTE: The relay in the time and temperature

controller is not field repairable. If
diagnosed as defective, the entire
board must be replaced.

3. When the convecti on fan motor (6) reaches full
speed the centrifugal switch (5) closes sending
power to the high limit (7). If the high limit is
closed, power goes to the coil of the hot air ele­ment contactor (8). When the contactor closes
power is sent to the heating elements (9).

2 --- 1 0

MARK V

8

9

7

3

6

5

10

4

11

1

2

FIGURE 5

2 --- 1 1

FAN DELAY WITH PULSE PLUS --- 18466 REV D

OPERATION

Component Reference

NOTE: Refer to FIGURE 6 page 2 --- 13 for compo-

nent locations.

1. MODE SELECTOR SWITCH

2. COOLING FAN

3. TEMPERATURE CONTROLLER

4. 10 MINUTE FAN DELAY TIMER

5. 30 MINUTE COOK TIMER

6. DOOR SWITCH

7. SPDT BLOWER SWITCH

8. CONVECTION FAN MOTOR

9. TEMPERATURE PROBE

10. POTENTIOMETER

11. HOT AIR ELEMENT CONTACTOR

12. COOK LIGHT

13. HOT AIR ELEMENTS

14. REPEAT SHOT PULSE TIMER

15. TPDT RELAY

16. FANONLIGHT

17. FAN OFF LIGHT

18. 50 WATT LAMPS

19. LIGHT SWITCH

Operation

1. Turn the mode selector switch (1) to the cook
position. Power goes to the cooling fan (2), ter­minal #8 of the temperature controller (3), and
terminal #1 of the ten minute fan delay timer (4).

2. If the ten minute fan delay timer is in the timed
out position a switch is made between terminals
#1 and #4 sending power to terminal #1 of the
thirty minute cook timer (5). Power is also sent
to one side of the door switch (6). If the doors are
closed the door switch should also be closed
sending power to terminal #6 of the temperature
control board (3) and the common terminal of a
SPDT blower switch (7). The speed of the con­vection fan motor (8) is dependant on the posi­tion of the SPDT blower switch.

temperature control board (3) and the
solid state potentiometer (10)

Power is sent out of terminal #7 to one coil of
the hot air element contactor (11) and the cook
light (12). When the contactor is energized the
hot a ir element (13) powers up.

4. To enable the pulse plus feature, the ten min­ute fan delay timer (4) must be set to a time. A
switch is then made between terminals #1 and
#2 sending power to terminal #2 of a repeat
shot pulse timer (14).

NOTE: By setting the ten minute fan delay timer

(4) power is interrupted to the thirty min­ute cook timer (5) making it inoperative.

The repeat shot pulse timer cycl es a TPDT relay
(15) interrupting the circuit to the convection fan
motor (8). The convection fan motor cycles on
and off for approximately thirty second intervals
for the duration of the time set on the ten minute
fan delay timer (4). The fan on light (16) illumi­nates whenever the TPDT relay closes. The fan
off light (17) illuminates whenever the ten minute
fan delay timer is set for a time.

5. The 50 watt lamps (18) only receive power when
the light switch (19) is activated. These lamps
are 115 vol t and are wired in series parallel.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This
allows the convection fan motor to operate
even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be
changed due to the difference in amp
draw. Reference detail inset in FIGURE 6.

NOTE: The resistive values for the probes used in

this oven have descending temperature
coefficients. As the temperature increases
the resistive values decrease.

3. On a call for heat from the cook temperature
control system a circuit is completed between
terminals #6 and #7 of the temperature con ­trol board (3).

NOTE: The temperature control system con-

sists of the temperature probe (9), the

2 --- 1 2

MARK V

13

12

18

11

13

19

2

17

8

7

1

10

3

9

14

16

15

5

4

6

FIGURE 6

2 --- 1 3

HUMIDAIRE --- 1846 REV M

OPERATION

Component Reference

NOTE: Refer to FIGURE 7 page 2 --- 16 for compo-

nent locations.

1. MODE SELECTOR SWITCH

2. COOK TIMER

3. DOOR SWITCH

4. TEMPERATURE CONTROL BOARD

5. SPDT BLOWER SWITCH

6. SINGLE SHOT TIMER

7. SPST THERMAL SWI TCH

8. TEMPERATURE PROBE

9. POTENTIOMETER

10. COOK LIGHT

11. ELEMENT CONTACTOR

12. HEATING ELEMENTS

13. 50 WATT LAMPS

14. LIGHT SWITCH

15. TIMER MOTOR

16. BUZZER

17. STEAM DURATION POTENTIOMETER

18. STEAM CYCLE START SWITCH

19. WATER SOLENOID VALVE

20. STEAM LIGHT

21. CONVECTION FAN

22. AXIAL COOLING FAN

Operation

1. Turn the mode selector switch (1) to the cook
position. Power goes to terminal #1 of the
cook timer (2), one side of the door switch (3),
terminal #8 of the temperature control board
(4) and the axial cooling fan (22)

2. If the doors are closed the door switch (3) should
also be closed sending power to terminal #6 of
the temperature control board (4), the SPDT blow­er switch (5), terminal #1 of a single shot timer (6),
and one side of a SPST thermal switch (7).

3. On a call for heat from the temperature control
circuit a circuit is completed between terminals
#6 and #7 of the temperature control board (4).

NOTE: The temperature control circuit con-

sists of the temperature probe (8), the
temperature control board (4) and the
solid state potentiometer (9).

Power is sent out of terminal #7 sending power
to the cook light (10) and one side of the ele­ment contactor (11). When the contactor
closes the heating elements (12) power up.

4. The 50 watt lamps (13) only receive power when
the light switch (14) is activated. These lamps
are 115 vol t and are wired in series parallel.

5. When the cook timer (2) is set for a time a cir­cuit is made between terminals #1 and #2
powering up the timer motor (15). At the expi­ration of the set time the switch in the cook tim­e r ( 2 ) t o g g l e s f r o m 1 --- 2 t o 1 --- 4 p o w e r i n g u p
the buzzer (16).

NOTE: Put the timer in the home position to si-

lence the buzzer.

6. If the oven is above 212_F (100_C) as sensed by
the thermal switch (7) the switch closes sending
power to the steam cycle start switch (18).

NOTE: The thermal switch is located in the

rearoftheoven.Thefaceofthethermal
switch is in contact with the oven liner.
The switch toggles closed if the oven
temperature exceeds 212_F (100_C).

NOTE: The steam cycle start switch is a mo-

mentary switch located on the front
control panel.

When the steam duration potentiometer (17) is
set and the steam cycle start switch (18) is
pressed the single shot timer (6) is activated for
the duration of time on t he steam duration po­tentiometer. This allows the water solenoid
valve (19) to open spraying atomized water
onto the blower w heel. The steam light (20) is
illuminated during the humidaire cycle.

7. The convection fan (21) receives power from
the SPDT blower switch (5). This switch deter­mines hi and lo speed.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This
allows the convection fan motor to operate
even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be
changed due to the difference in amp
draw. Reference detail inset in FIGURE 7.

2 --- 1 4

MARK V

NOTE: The resistive values for the probes used in

this oven have descending temperature co­efficients. As the temperature increases the
resistive values decrease.

NOTE: Reference page 4 ---2 of the Troubleshoot-

ing section for the reistive values of the
heating elements. The reading should be
taken in a cold state.

2 --- 1 5

OPERATION

13

13

12

21

12

1846M

10

22

9

11

15

16

19

20

14

7

5

8

1

2

3

17

18

6

FIGURE 7

2 --- 1 6

MARK V

INTELLIHOLD AND INTELLIPLUS --- 22027 REV A

Component Reference

NOTE: Refer to FIGURE 8 page 2 --- 18 for compo-

nent locations.

1. MODE SELECTOR SWITCH

2. DOOR SWITCH

3. AXIAL FAN

4. TEMPERATURE CONTROL BOARD

5. CONVECTION FAN

6. OVEN READY LIGHT

7. HEATING ELEMENT CONTACTOR

8. HEATING ELEMENTS

9. 50 WATT LAMPS

10. LIGHT SWITCH

11. PROBE

Operation

1. Turn the mode selector switch (1) to the cook
position. Power goes to one side of the door
switch (2), the axial fan (3) and to either E1 or
E2 of the temperature control board (4).

NOTE: This control is multi-voltage. It may be

used on 240, 208 and 120. FIGURE 8
shows connections to E1 and E2 indi­cating a 240 or 208 volt application.

changed due to the difference in amp
draw. Reference detail inset in FIGURE 8.

NOTE: The resistive values for the probe (11) used

in this oven have ascending temperature
coefficients. As the temperature increases
the resistive values also increase.

NOTE: Reference page 4 ---2 of the Troubleshoot-

ing section for the reistive values of the
heating elements. The reading should be
taken in a cold state.

2. If the doors are closed the door switch (2)
should also be closed sending power to termi­nalE10ofK2,E8ofK3andE6ofK1.Ifatime
and temperature is programmed into the con­trollereitherK2orK3closesendingpowerto
the convection fan (5).

NOTE: K2 is for high fan, K3 is for low fan.

3. On a call for heat the contacts in K1 close,
sending power to the oven ready light (6) and
one side of t he heating element contactor (7).
When the contactor closes the heating ele­ments (8) power up.

4. The 50 watt lamps (9) only receive power w hen
the light switch (10) is activated. These lamps
are 115 volt and are wired in series parallel.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This
allows the convection fan motor to operate
even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be

2 --- 1 7

OPERATION

8

7

9

6

4

5

8

3

10

2

1

FIGURE 8

2 --- 1 8

MARK V

INTELLITOUCH --- 19361 REV A

Component Reference

NOTE: Refer to FIGURE 9 page 2 --- 20 for compo-

nent locations.

1. MODE SELECTOR SWITCH

2. COOLING FAN

3. DOOR SWITCH

4. STEP DOWN TRANSFORMER

5. INTELLITOUCH CONTROL

6. CONVECTION FAN

7. TEMPERATURE PROBE

8. CENTRIFUGAL SWITCH

9. ELEMENT CONTACTOR

10. HOT AIR ELEMENTS

11. 50 WATT LAMPS

12. LIGHT SWITCH

Operation

1. Turn the mode selector switch (1) to the cook
position. Power goes to the cooling fan (2), one
side of the door switch (3) and terminal #5 of
a 208/24 volt step down transformer (4). 24
volts are applied to terminal #T2 of the intelli­touch controller (5).

allows the convection fan motor to operate
even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be
changed due to the difference in amp
draw. Reference detail inset in FIGURE 9.

NOTE: The resistive values for the probes used in

this oven have descending temperature
coefficients. As the temperature increases
the resistive values decrease.

NOTE: Reference page 4 ---2 of the Troubleshoot-

ing section for the reistive values of the
heating elements. The reading should be
taken in a cold state.

NOTE: To calibrate the oven operation perfor-

mancecharacteristicsseepage3---8ofthe
Calibration and Adjustment section.

2. If the doors are closed the door switch should
also be closed sending power to the convec­tion fan (6).

3. On a call for heat, as sensed by the tempera­ture probe (7), a set of contacts close betw een
terminals T2 and T5 sending 24 volts to one
side of the centrifugal switch (8).

NOTE: The centrifugal switch is a non-repair-

able item. It is located in the convec­tion fan motor. This switch closes when
the convection fan reaches full speed.
It is considered a safety switch and
should not be bypassed.

If the centrifugal switch is closed, 24 volts are
applied to the coil of the hot air element contac ­tor (9). When the contactor is energized, the
hot a ir elements (10) power up.

4. The 50 watt lamps (11) only receive power when
the light switch (12) is activated. These lamps
are 115 vol t and are wired in series parallel.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This

2 --- 1 9

11

OPERATION

2

5

10

12

1

6

4

9

3

8

FIGURE 9

2 --- 2 0

MARK V

BLODGETT IQ CONTROL --- 33078 REV A

Component Reference

NOTE: Refer to FIGURE 10 page 2 ---22 for compo-

nent locations.

1. POWER SWITCH

2. STEP DOWN TRANSFORMER

3. RELAY BOARD

4. AXIAL FAN

5. COMPUTER

6. TEMPERATURE PROBE

7. ELEMENT CONTACTOR

8. HEATING ELEMENTS

9. CONVECTION FAN MOTOR

10. DOOR SWITCH

Operation

1. Toggle the power switch (1) to the on position.
Power goes to the primary side of a 208/24 volt
step down transformer (2), t erminal #2 of K1 of
the relay board (3), terminal #4 of K2 of the
relay board, terminal #7 of K3 of the relay
board and the axial fan (4).

2. On a call for heat from the computer (5) as
sensed by the temperature probe (6), the coil
of K1 powers up closing the contacts between
terminals #2 and #1 of K1 on the relay board
(3). The coil of the element contacator (7) pow­ers up. When the contactor closes the heating
elements (8) power up.

NOTE: Reference page 4 ---2 of the Troubleshoot-

ing section for the reistive values of the
heating elements. The reading should be
taken in a cold state.

3. Thespeedoftheconvectionfanmotor(9)is
determined by the program in the computer
(5). The computer either closes K2 for h igh
speed or K3 for low speed.

4. When the doors are closed the door switch
(10) is activated. The computer closes relays
K1, K2 and K3. If the doors are open or the
switch is broken these relays drop out and the
LED displays door.

NOTE: This oven may be converted from single to

three phase, however, contactors must be
changed due to the difference in amp
draw. Reference detail inset in FIGURE 10.

NOTE: The resistive values for the probes used in

this oven have descending temperature
coefficients. As the temperature increases
the resistive values decrease

2 --- 2 1

OPERATION

8

8

8

8

8

8

9

7

6

10

4

1

2

3

FIGURE 10

2 --- 2 2

MARK V

This page intentionally left blank.

2 --- 2 3

CHAPTER 3

CALIBRATION AND

ADJUSTMENT

MARK V

DOORS

The Mark V ovens feature double side mounted
doors which operate simultaneously by means of
a chain and turnbuckle linkage assembly. Should
field adjustment be necessary, t he two turnbuckles
are located immediately behind the combustion
compartment cover.

For units manufactured prior to August 1984.

1. Adjust one turnbuckle, then the other until the
doors are properly synchronized.

NOTE: The doors are properly adjusted if the

right door is fully closed when the left
door (the door with the handle) has
1/2”-1” of travel remaining.

Both turnbuckles must be adjusted to prevent
strain on the door operating mechanism.

2. Tighten the turnbuckle lock nuts.

Turnbuckle

(not shown)

For units manufactured after August 1984

Be sure the doors are in line with each other when
viewed from the top and front. If the doors are misa­ligned adjust as follows:

1. Remove the bottom trim.

2. Loosenthefive(5)boltsintheU-shapedlower
door hinge and sprocket assembly.

3. Slide the assembly until the doors are aligned.

4. Tighten the bolts.

5. Replace the bottom trim.

Door Hinge

Sprocket

Assembly

Turnbuckle

Turnbuckle

FIGURE 1

To adjust the ball plunger catch:

1. Insert a spanner key in the notches on both
sides of the ball plunger. Loosen the lock nut
with a wrench.

2. Adjust the ball plunger by turning left or right
with the spanner k ey until the plunger engages
in the striker plate on the door.

3. With the spanner key still inserted in the ball
plunger notches, tighten the lock nut.

FIGURE 2

To adjust the doors for proper operation, open the
doors until the right hand door back flange is even
with the front line of the oven as viewed from above.
The left hand door should be positioned so the
door pressure lock touches the right hand door. If
the doors need adjustment proceed as follows:

1. Loosen the chain drive.

2. Adjustforproperlocation.

3. Tightenthechaindrive.

Front of Oven

Left
Door

Right Door

Pressure Lock

FIGURE 3

3 --- 1

CALIBRATION AND ADJUSTMENT

DOOR BLOWER SWITCH

The door activated blower switch should be ad­justed so the doors are about 1-1/2” (4 cm) from
the liner when the switch shuts the blower off. If
field adjustment is necessary, the switch can be
reached by removing the combustion compart­ment cover.

1. Open the right hand door until it is approxi­mately 2” (5 cm) from the liner.

2. Place the arm of the cam assembly, located on
the door sprocket, against the push button.

3. Tighten the set screw.

When the doors are fully closed, the cam arm de­presses the push button enough to allow blower
operation. An audible click will determine if t he
switches are operating correctly.

The switch may be moved forward or backward in
the mounting bracket as necessary for alignment.

Door Arm

Sprockets

Door
Chain

Door Switch
Cam Assembly

Hinge Pin

Micro
Switch

THERMOSTAT

BULB AND CAPILLARY THERMOSTAT

For units manufactured prio r to August 1984

1. Turn the mode selector/power switch to COOK
ONLY.

2. Toggle the blower switch to ON.

3. Toggle the cool down switch to MANUAL.

4. Place a pyrometer t hermocouple at the center
of the thermostat bulb or reliable mercury ther­mometer on the middle shelf 6” from the front
edge and in the center of the shelf.

5. Turn the thermostat dial to 350_F (177_C)..

6. When the red indicator light on the control pan­el goes out, check the thermometer or pyrom­eter to determine oven temperature.

If this reading is within 10_F(6_C) of the ther-
mostat setting, do not change the thermostat.

If this reading differs more than 10_F(6_C)
from the thermostat setting recalibrate the
thermostat.

For units manufactured after August 1984.

1. Turn the selector switch to COOK.

2. Place a pyrometer t hermocouple at the center
of the thermostat bulb or reliable mercury ther­mometer on the middle shelf 6” (15 cm) from
the front edge and in the center of the shelf.

3. Turn the thermostat dial to 350_F (177_C). Let
the oven heat for at least 1/2 hour.

FIGURE 4

4. When the red indicator light on the control pan­el goes out, check the thermometer or pyrom­eter to determine oven temperature. If this
reading is within 10_F(6_C) of the thermostat
setting, do not change the thermostat. If this
reading differs more than 10_F(6_C) from the
thermostat setting recalibrate the thermostat
as follows. See FIGURE 6 page 3 ---3.

A.) Loosen the set screws in the thermostat

knob. Pull the knob forward.

B.) With a screwdriver, turn the calibration

screw in the center of the thermostat stem
either clockwise to lower the temperature
or counter-clockwise to raise the tempera­ture.

3 --- 2

MARK V

Thermocouple

Bulb Clip

Fluid Filled

Capillary

Thermostat

Pyrometer

Lead

FIGURE 5

For units manufactured prior to December 1987.

1. Loosen the set screws in the thermostat knob.
Pull the knob forward.

2. With a screwdriver, turn the calibration screw
in the center of the thermostat stem either
clockwise to lower the temperature or counter­clockwisetoraisethetemperature.

Calibration

Screw

NOTE: Do not allow the main stem of the ther-

mostat to turn when adjusting the cal­ibration screw.

3. Open the doors.

4. Turn the selector switch to COOL DOWN. The
blower will continue to operate. Let the temper­ature of the oven decrease 100-150_F
(56-83_C).

5. Turn the selector switch to COOK.

6. Repeat the steps above until the oven temper­ature is within 10_F(6_C) of the thermostat set-
ting.

FIGURE 6

3 --- 3

SOLID STATE MANUAL

1. Place a pyrometer in the center of the oven.

2. Turn the mode selector switch to cook.

3. Turn the thermostat to 350_F (177_C).

4. When the red indicator light goes out, check
the pyrometer to determine oven temperature.

5. If this reading is within 10_ (6_C) of the thermo­stat setting no adjustment is needed.

If the reading is greater than 10_ (6_C) adjust
as follows:

A.) Locate the trim pot on the solid state tem-

perature board.

CALIBRATION AND ADJUSTMENT

B.) Turnthe adjustment screw to raise or lower

the setting.

LIGHT OFF

OVEN READY

THERMOSTAT

TIMER

3 --- 4

FIGURE 7

MARK V

SELECTOR SWITCH CALIBRATION

1. Place a pyrometer in the center of the oven.

2. Turn the mode selector switch to cook.

3. Set 8 position selector switch to one of the
eight positions.

NOTE: The 8 individual positions are each set

for a temperature of the customer’s
choosing. For example, if position 1 is

_

set for 350
light should go out when it gets to with­in 10 degrees of setpoint.

4. If the light goes out within 10 degrees, no ad­justment is required. If the light does not go out
within 10 degrees of setpoint calibrate the
switch as follows:

A.) Locate the potentiometer on the 8 position

selector switch labeled R1.

NOTE: There are 8 trim pots on this device.

They are labeled R1, R2, R3, etc.

B.) Turn the brass screw on top of the poten-

tiometer clockwise to increase the tempera­ture. Turn the brass screw on top of the po­tentiometer counter-c lo ckwise to decrease
the temperature.

F (177_C) the red indicator

5. Repeat steps 3 --- 4 for all 8 positions.

NOTE: It is possible for all 8 positions to be out

of calibration but highly unlikely.

FIGURE 8

3 --- 5

SOLID STATE DIGITAL CONTROL

CALIBRATION AND ADJUSTMENT

To Initiate Programming

1. Set the time to 1 minute.

2. Set the temperature to 151_F(66_C).

To Access Second Level Programming

1. Press and hold the temperature key and the
start/stop key simultaneously.

2. The control beeps and displays the software
version for a few seconds.

3. The control then displays 2NdL. The control
has entered the second level program.

To Change the Temperature Offset

1. Press the temperature key.

2. The control displays OFFS or offset for a few
seconds. It then displays the current offset
which should be 0_F.

3. Rotate the dial to enter a ¦ 50_F(28_C) offset.
Use this to calibrate the oven if necessary.

To Set the Display Scales

1. Press the temperature key.

2. The control displays the current setting from
the following menu. See FIGURE 9. This menu
controls 3 separate parameters:

A.) First Digit --- the desired time display (ie

hrs/min or min/sec)

DISPLAY SCALE EXAMPLES

DIGITS

ST

1

H = Hrs/Min Display (Factory Setting)

_=Min/SecDisplay

ND

2

E = Electric Oven

_=GasOven

RD

3

_Cor_F
Temperature Display

TH

4

B.) Second Digit --- Electric or Gas oven

C.) Third and Fourth Digit --- the desired tem-

perature scale (ie _For_C)

3. To adjust the setting turn the dial 1 click at a
time.

NOTE: If the control is set for minutes and seconds

the first digit will be blank. If the control is
set for a gas oven the second digit will be
blank.

FIGURE 9

To Return to Normal Operating Mode

1. Press the temperature key.

2. The control goes through self check then dis­plays the set temperature 151_F(66_C).

3. The oven can now be controlled as normal.

3 --- 6

MARK V

INTELLIHOLD AND INTELLIPLUS CONTROLS

NOTE: For error code display information see

page 4---3 of the Troubleshooting section.

Temperature Calibration

1. Turn the temperature control knob until the
temperature in the display reads X10 (any
number followed by 10).

2. Turn the time control knob until the time in the
display is 00:00.

3. Press and hold the start/ timer key. The display
reads UPO.

4. Place a pyrometer in the center of the oven to
measure the actual oven temperature.

NOTE: During operation, the temperature

control is based on the measured tem­perature and the temperature offset
which is programmed into the control.
If the temperature measured in the
center of the oven is below the oven
setpoint a positive offset is needed. If
the temperature measured in the cen­ter of the oven is above the oven set­point a negative offset is needed.

5. Turn the temperature control knob to set the
offset, either positive or negative.

6. Press the act temp key to store the new offset
and exit temperature calibration.

Temperature Display Scales

1. Turn the temperature control knob until the
temperature in the display reads X20 (any
number followed by 20).

2. Turn the time control knob until the time in the
display is 00:00.

3. Press and hold the start/ timer key. The display
reads either CCC or FFF.

4. Press and hold the start/timer key to toggle
from _Cto_F.

5. Press the act temp key to store the new scale
and exit temperature display.

Time Display Scales

1. Turn the temperature control knob until the
temperature in the display reads X30 (any
number followed by 30).

2. Turn the time control knob until the time in the
display is 00:00.

3. Press and hold the start/ timer key. The display
reads either HRS or MIN.

4. Press and hold the start/timer key to toggle
from hours to minutes.

5. Press the act temp key to store the time scale
and exit time display.

3 --- 7

INTELLITOUCH CONTROL

CALIBRATION AND ADJUSTMENT

NOTE: For error code display information see

page 4---3 of the Troubleshooting section.

To access 2nd level programming

1. Turn the oven off.

2. Locate the 3 pin header on the bottom right
side of the control. Move the jumper from the
middle and bottom pins to the middle and top
pins exposing the bottom pin.

3. Turn the oven on. The program LED (1) lights.

Programming the 2nd level parameters

1. The #1 LED illuminates.

NOTE: The LED’s (3) are located next to the

product and load keys. The LED identi­fication numbers (2) are located to the
left of the product and load keys. See
FIGURE 10.

INTELLITOUCH

HEAT PROGRAM

DISPLAY

2

1

PROD

3

2

PROD

3

PROD

4

PROD

5

PROD

6

PROD

7

PROD

READY

8

1

ENTER

2

TEMP

3

CNCL

4

5

6

7

R

TEMP

R

TIME

LOAD

1

9

LOAD

2

0

LOAD

3

LOAD

4

LOAD

5

1

2

3

NOTE: Use product keys 1-7 for numerals 1-7.

Use load keys 1-3 for numerals 8,9 and
0 respectively.

3. Press the enter key to save the parameter set­ting.

4. The #2 LED illuminates

5. Repeat steps 1 -3 for each parameter. When
the final parameter setting is entered and
saved the #1 LED illuminates.

LED(s)

Parameter Setting

1 Offset 0

2 Hrs/Min timer 0F

1,2 Fahrenheit (0=_F, < 1 = _C) 0F

3 Proportional 0F

1,3 Integration 1F

2,3 Dead band 3F

1,2,3 Cycle time 12F

4 Minimum on time 3F

1,4 Hi temp alarm 550F

2,4 Ready temp differential 15F

1,2,4 Minimum setpoint 150F

3,4 Maximum setpoint cook 500F

1,3,4 Minimum setpoint hold 0F

2,3,4 Maximum setpoint hold 0F

1,2,3,4 Fan 2 speed 0F

5 Fan rev. 0F

TABLE 1

To exit the 2nd level programming

FIGURE 10

2. Use the product and load keys to enter numeri­cal data. See TABLE 1 for correct parameter
settings.

1. Turn the oven off.

2. Move the jumper from the middle and top pins
to the middle and bottom pins exposing the
top pin.

3. Turn the oven on.

3 --- 8

MARK V

INTELLITOUCH II CONTROL

To access 2nd level progra mming and diagnos­tics

1. The display reads SELECT. Press CLEAR 1, 2,
3, 4, 5, 6, ENTER.

2. The display reads CODE ---? Press 1, 2, 3, 4, 5,
6ENTER.

3. The display reads ACCESS.

To r un L ED d i a g n o s ti cs

1. Press CLEAR 1, 1, 1 ENTER.

2. The control runs self-diagnostics on each LED
individually. When all of the LED’s light togeth­er press the CLEAR k ey.

3. The display flashes EXIT then ACCESS.

To check the software configuration

1. Press CLEAR 1, 2, 3 ENTER.

2. The display lists the software configuration in­formation.

3. The display flashes EXIT then ACCESS.

OVEN CALIBRATION

1. Press CLEAR, TEMP, TEMP, TEMP, ENTER.

Temperature display scale

2. The display flashes _F/_C t h e n M O D E --- ?

3. Press any key to toggle the scale from _Fto_C.

4. Press the PROG/ENTER key to lock in new
scale.

5. The display flashes T'_F(orT'_C).

Temperature offset

1. Once the temperature scale has been pro­grammed, the display flashes either POS *

OFFSET or NEG * OFFSET

NOTE: POS OFFSET is displayed if a value has

been programmed in for a positive off­set. NEG OFFSET is displayed if a val­ue has been programmed for a nega­tive offset. The only time both will be
displayed is if a value of 0 has been en­tered for both.

2. Enter a value for the desired offset. The display
flashes DISPLAY * INTEG?.

3. Press the PROG/ENTER key. The default value
of 30 will be displayed.

4. Press the PROG/ENTER key. The display will
flash T-CT RL * I N TE G ?.

5. Press the PROG/ENTER key. The default value
of 10 will be displayed.

6. Press the PROG/ENTER key.

Ready Band

1. The display flashes READY, BAND and POS.

2. Use the numeric keys to enter a value between
1 and 25. Press t he PROG/ENTER key.

3. The display flashes READY, BAND and NEG.

4. Use the numeric keys to enter a value between
1 and 25. Press t he PROG/ENTER key.

To exit oven calibration

1. The display flashes ACCESS, DONE and EXIT.

2. Press CLEAR, CLEAR, CLEAR.

3. The display flashes REBOOT and SELECT.

3 --- 9

BLODGETT IQ CONTROL

CALIBRATION AND ADJUSTMENT

NOTE: For error code display information see

page 4---3 of the Troubleshooting section.

2ND LEVEL PROGRAMMING

Entering the programming mode

1. Press the prog key. The top display reads
CodE.

2. Use the product keys to enter the program­mingaccesscode:4512.Presstheenterkey.
The top display reads SYS.

Programming hold

1. Press the scan key. The t op display reads
Hold. Press the toggle/clear key to toggle be­tween YES and no.Pressthescankey.

If no is chosen:

A.) The controller advances to programming

the setback mode.

Ifyesischosen:

A.) The top display reads AUTO.Pressthe

toggle/clear key to toggle between YES
and no. Press the scan key to enter the de ­siredholdmode.

B.) The top display reads HOLD. The bottom

display flashes the current hold time. Use
the product keys to enter the desired hold
time. Press the scan key to enter the new
hold time.

C.) The top display reads HOLD. The bottom

display flashes the current hold tempera­ture. Use the product keys to enter the de­sired hold time. Press the scan key to enter
the new hold temperature.

D.) The top display reads FAn. The bottom dis-

play gives the current fan mode. To
change the fan mode press the toggle/
clear key. The bottom display toggles be ­tween Hi and Lo. Press the scan key to en­ter the new fan mode and continue with
programming the setback mode.

Programming the setback mode

1. The top display reads SEtb. The bottom dis­play gives the setback mode. To change the
setback press the toggle/clear k ey. The bot­tom display toggles between YES and no.
Press the scan key.

If no is chosen:

A.) The controller advances to programming

the temperature mode.

Ifyesischosen:

A.) The bottom display gives the current set-

back time. Use the product keys to the en ­ter the desired setback time. Press the
scan key to enter the new setback time.

B.) The bottom display gives the current set-

back temperature. Use the product keys
to the enter the desired setback tempera­ture. Press the scan key to enter the new
setback and continue w ith programming
the temperature mode.

Programming the temperature mode (_For_C)

1. The top display reads dEg. The bottom display
gives the units. To change the units press the
toggle/clear key. The bottom display toggles
between F and C.

2. Press the scan key to enter the new tempera­ture units and continue programming the oven
size.

Programming the oven size

1. The top display reads APPL. The bottom dis­play reads either FULL or HALF.Pressthe
toggle/clear key until the bottom display reads
FULL for the Mark V.

2. Press the scan key to enter the oven size and
continue with exiting the programming mode.

Exiting the programming mode

1. The top display reads SYS. Press the prog key.
The control returns to the operating standby
mode.

3 --- 1 0

MARK V

PROGRAMMING THE OFFSET

Entering the offset programming mode

1. Press the prog key. The top display reads
CodE.

2. Use the product keys to enter the offset pro­gramming access code: 4 5 2 3. Press the en­ter key. The top display reads oFF. The bottom
display reads SEt.

Programming the temperature offset

1. Press the scan key. The t op display reads

oFST. The bottom display reads either xxF or

--- x x F.

2. Press the toggle/clear key to toggle between
positive and negative. Use the product keys to
the enter the desired temperature offset.

3. Press the scan key to enter the new tempera­ture offset.

Exiting the o ffset programming mode

1. Press the prog key. The control returns to the
operating standby mode.

3 --- 1 1

CALIBRATION AND ADJUSTMENT

BLODGETT IQ2TTTT CONTROL FACTORY LEVEL PROGRAMMING

Entering the programming mode

1. Press the program key. The top display reads
CodE.

2. Use the product keys to enter the factory pro­grammingaccsscode:4523.Presstheenter
key. The top dislay reads Fact.

Programming the oven configuration

1. Press the SCAN KEY. The display reads Appl.

2. Press the TOGGLE/CLEAR KEY to toggle be­tween electric oven and gas oven. Set the
choice for the oven type. Press the SCAN KEY
to enter the choice.

3. Press the TOGGLE/CLEAR KEY to toggle be­tween half sized or full sized oven. Set the
choice for the oven type. Press the SCAN KEY
to enter the choice.

NOTE: Mark V and DFG-100 are full sized

ovens. CTB and DFG-50 are half sized
ovens.

Programming the temperature offset

1. The top display reads oFF. The bottom display
reads SEt.

2. Press the SCAN KEY. The top display reads oFST.
The bottom display reads either xxF or --- xx F.

3. Press the TOGGLE/CLEAR KEY to toggle be­tween positive and negative. Use the product
keys to the enter the desired temperature offset.

4. Press the SCAN KEY to enter the new tempera­ture offset.

Enabling/Disabling the fan error detection circuit

1. The top display reads FanC. The bottom dis­play reads YES or NO.

2. Press the TOGGLE/CLEAR KEY to toggle be­tween choices.

3. Pressscantomovetonextoperatingparame­ter.

Programming fan speed option

1. The top display reads FanS. The bottom dis-
play reads 1 or 2.

2. Press the TOGGLE/CLEAR KEY to toggle be­tween choices: 1 for a single speed motor or 2
for a two speed motor.

3. PressSCANtomovetothenextoperatingpa­rameter.

Programming the maximum temperature setpoint

1. The top display reads tELt (temperature limit)
and the bottom display reads either 500 or 550.

2. Press the TOGGLE/CLEAR key to toggle be­tween choices 500_F or 550_Fmaximumtem­perature setting.

3. Press scan to enter the maximum setpoint
temperature.

_

NOTE: Use 500

Mark V, CTB and DFG-50. Use 550
for the DFG-100 XCEL and Mark V
XCEL.

Exiting the factory programming mode

1. The top display reads Fact.PressthePROG
KEY. The control returns to the operating
mode.

F for the DFG-100, DFG-200,

_

F

3 --- 1 2

MARK V

PROBE RESISTANCE VS HEATING ELEMENTS

Element Resistance

208 volt 12.3--- 13.6 Ω

220 volt 13.8--- 15.2 Ω

240 volt 16.4--- 18.1 Ω

440 volt 58.0--- 61.0 Ω

480 volt 65.6--- 72.6 Ω

TABLE 2

PROBERESISTANCEVSTEMPERATURE

Solid State Manual and Digital Controllers
(probe P/N 18588)

_F _C Ohms _F _C Ohms

100 38 53029 310 155 1519

125 52 30785 320 160 1340

150 66 18591 330 166 1186

175 80 11633 340 171 1052

200 93 7528 350 177 936

210 99 6391 360 182 835

220 105 5471 370 188 747

230 110 4705 380 193 669

240 116 4030 390 199 601

250 121 3441 400 205 542

260 127 2967 425 219 421

270 132 2583 450 232 333

280 138 2255 475 246 265

290 143 1970 500 260 216

300 149 1728

Intellitouch II Controller
(probe P/N 32289)

_F _C Ohms _F _C Ohms

32 0 500 212 100 693

68 20 539 250 120 730

75 24 545 300 150 787

86 30 558 356 180 842

125 50 597 392 200 879

140 60 616 450 230 934

175 80 655 500 260 989

200 93 680 554 260 1042

TABLE 3

TABLE 4

3 --- 1 3

CALIBRATION AND ADJUSTMENT

Intellitouch (probe P/N 20360) and
Blodgett IQ Controllers (probe P/N 33074

_F _C Ohms _F _C Ohms

60 16 1059 235 113 1422

65 18 1067 240 116 1432

70 21 1080 245 118 1442

75 24 1090 250 121 1453

80 27 1099 255 124 1463

85 29 1112 260 127 1473

90 32 1122 265 130 1483

95 35 1133 270 132 1493

100 38 1143 275 135 1503

105 41 1153 280 138 1514

110 43 1164 290 143 1534

115 46 1174 295 146 1544

120 49 1185 300 149 1554

125 52 1195 305 152 1564

130 55 1206 310 155 1574

135 57 1216 315 157 1584

140 60 1226 320 160 1594

145 63 1237 325 163 1604

150 66 1247 330 166 1614

155 68 1258 335 169 1624

160 71 1268 340 171 1634

165 74 1278 345 174 1644

170 77 1289 350 177 1654

175 80 1299 355 180 1664

180 82 1309 360 182 1674

185 85 1320 365 185 1684

190 88 1330 370 188 1694

200 93 1350 375 191 1704

205 96 1361 380 193 1714

210 99 1371 385 196 1724

215 102 1381 390 199 1734

220 105 1391 395 202 1744

225 107 1402 400 205 1754

230 110 1412 405 207 1764

Intellitouch (probe P/N 20360) and
Blodgett IQ Controllers (probe P/N 33074

_F _C Ohms _F _C Ohms

410 210 1774 460 238 1872

415 213 1783 465 241 1882

420 216 1793 470 244 1892

425 219 1803 475 246 1901

430 221 1813 480 249 1911

435 224 1823 485 252 1921

440 227 1833 490 254 1931

445 230 1843 495 255 1940

450 232 1852 500 260 1950

455 235 1862

TABLE 5

3 --- 1 4

MARK V

Intellihold and Intelliplus Controllers (probe P/N 23392)

_F Ohms _F Ohms _F Ohms _F Ohms _F Ohms _F Ohms

70 1080 108 1160 146 1239 184 1318 222 1395 260 1473

71 1082 109 1162 147 1241 185 1320 223 1398 261 1475

72 1084 110 1164 148 1243 186 1322 224 1400 262 1477

73 1086 111 1166 149 1245 187 1324 225 1402 263 1479

74 1089 112 1168 150 1247 188 1326 226 1404 264 1481

75 1091 113 1170 151 1249 189 1328 227 1406 265 1483

76 1093 114 1172 152 1251 190 1330 228 1408 266 1485

77 1095 115 1174 153 1253 191 1332 229 1410 267 1487

78 1097 116 1176 154 1255 192 1334 230 1412 268 1489

79 1099 117 1178 155 1258 193 1336 231 1414 269 1491

80 1101 118 1181 156 1260 194 1338 232 1416 270 1493

81 1103 119 1183 157 1262 195 1340 233 1418 271 1495

82 1105 120 1185 158 1264 196 1342 234 1420 272 1497

83 1108 121 1187 159 1266 197 1344 235 1422 273 1499

84 1110 122 1189 160 1268 198 1346 236 1424 274 1501

85 1112 123 1191 161 1270 199 1348 237 1426 275 1503

86 1114 124 1193 162 1272 200 1350 238 1428 276 1505

87 1116 125 1195 163 1274 201 1352 239 1430 277 1507

88 1118 126 1197 164 1276 202 1354 240 1432 278 1589

89 1120 127 1199 165 1278 203 1357 241 1434 279 1512

90 1122 128 1201 166 1280 204 1359 242 1436 280 1514

91 1124 129 1203 167 1282 205 1361 243 1438 281 1516

92 1126 130 1206 168 1284 206 1363 244 1440 282 1518

93 1128 131 1208 169 1287 207 1365 245 1442 283 1520

94 1131 132 1210 170 1289 208 1367 246 1444 284 1522

95 1133 133 1212 171 1291 209 1369 247 1447 285 1524

96 1135 134 1214 172 1293 210 1371 248 1449 286 1526

97 1137 135 1216 173 1295 211 1373 249 1451 287 1528

98 1139 136 1218 174 1297 212 1375 250 1453 288 1530

99 1141 137 1220 175 1299 213 1377 251 1455 289 1532

100 1143 138 1222 176 1301 214 1379 252 1457 290 1534

101 1145 139 1224 177 1303 215 1381 253 1459 291 1536

102 1147 140 1226 178 1305 216 1383 254 1461 292 1538

103 1149 141 1229 179 1307 217 1385 255 1463 293 1540

104 1151 142 1231 180 1309 218 1387 256 1465 294 1542

105 1153 143 1233 181 1311 219 1389 257 1467 295 1544

106 1156 144 1235 182 1313 220 1391 258 1469 296 1546

107 1158 145 1237 183 1315 221 1393 259 1471 297 1548

3 --- 1 5

CALIBRATION AND ADJUSTMENT

Intellihold and Intelliplus Controllers (probe P/N 23392)

_F Ohms _F Ohms _F Ohms _F Ohms _F Ohms _F Ohms

298 1550 335 1624 372 1698 409 1772 446 1845 483 1917

299 1552 336 1626 373 1700 410 1774 447 1846 484 1919

300 1554 337 1628 374 1702 411 1776 448 1848 485 1921

301 1556 338 1630 375 1704 412 1778 449 1850 486 1923

302 1558 339 1632 376 1706 413 1780 450 1852 487 1925

303 1560 340 1634 377 1708 414 1782 451 1854 488 1927

304 1562 341 1636 378 1710 415 1783 452 1856 489 1929

305 1564 342 1638 379 1712 416 1785 453 1858 490 1931

306 1566 343 1640 380 1714 417 1787 454 1860 491 1932

307 1568 344 1642 381 1716 418 1789 455 1862 492 1934

308 1570 345 1644 382 1718 419 1791 456 1864 493 1936

309 1572 346 1646 383 1720 420 1793 457 1866 494 1938

310 1574 347 1648 384 1722 421 1795 458 1868 495 1940

311 1576 348 1650 385 1724 422 1797 459 1870 496 1942

312 1578 349 1652 386 1726 423 1799 460 1872 497 1944

313 1580 350 1654 387 1728 424 1801 461 1874 498 1946

314 1582 351 1656 388 1730 425 1803 462 1876 499 1948

315 1584 352 1658 389 1732 426 1805 463 1878 500 1950

316 1586 353 1660 390 1734 427 1807 464 1880 501 1952

317 1588 354 1662 391 1736 428 1809 465 1882 502 1954

318 1590 355 1664 392 1738 429 1811 466 1884 503 1956

319 1592 356 1666 393 1740 430 1813 467 1886 504 1958

320 1594 357 1668 394 1742 431 1815 468 1888 505 1960

321 1596 358 1670 395 1744 432 1817 469 1890 506 1962

322 1598 359 1672 396 1746 433 1819 470 1892 507 1964

323 1600 360 1674 397 1748 434 1821 471 1893 508 1966

324 1602 361 1676 398 1750 435 1823 472 1895 509 1967

325 1604 362 1678 399 1752 436 1825 473 1897

326 1606 363 1680 400 1754 437 1827 474 1899

327 1608 364 1682 401 1756 438 1829 475 1901

328 1610 365 1684 402 1758 439 1831 476 1903

329 1612 366 1685 403 1760 440 1833 477 1905

330 1614 367 1688 404 1762 441 1835 478 1907

331 1616 368 1690 405 1764 442 1837 479 1909

332 1618 369 1692 406 1766 443 1839 480 1911

333 1620 370 1694 407 1769 444 1841 481 1913

334 1622 371 1696 408 1770 445 1843 482 1915

TABLE 6

3 --- 1 6

MARK V

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3 --- 1 7

CHAPTER 4

TROUBLESHOOTING

MARK V

HEAT SYSTEM

POSSIBLE CAUSE(S) SUGGESTED REMEDY

Symptom #1 --- Oven heaters and motor do not run

D

Oven not plugged in.

D

Circuit breaker tripped.

D

Doors not closed tightly.

D

10 amp fuse on control panel may be blown.

D

Door switch inoperative.

D

Mode selector switch inoperative.

D

If control configuration has fan delay pulse plus
feature, this feature may be activated.

D

If control configuration has a cycle feature this
feature may be activated.

D

Convection motor out due to thermal overload.

D

Plug in oven.

D

Reset breaker, check amp draw. Reference electri­cal specifications on page NO TAG of the Introduc­tion.

D

Close doors tightly.

D

Replace the fuse and check for shorts.

D

Replace door switch.

D

Replacemodeswitch.

D

Deactivate fan delay pulse plus.

D

Deactivate the cycle feature.

D

Check for external heat against the motor . (such as
improper flue connectors on double stack unit.

D

Check for motor overamping. Replace the motor.

Symptom #2 --- Convection fan motor does not operate

D

Oven is not plugged in

D

Oven not set to cook mode.

D

Circuit breaker tripped.

D

Plug in oven.

D

Turn oven mode switch to on.

D

Reset circuit breaker and check the amp draw.
Reference electrical specifications on page
NO TAG of the Introduction.

D

Door switch inoperative.

D

Motor off due to thermal overload.

D

Replace door switch.

D

Check for external heat on the motor.

D

On double stacked units check that the flue con­nector is properly installed.

D

Check the amp draw. If too high, replace the mo­tor.

D

If control configuration has standard fan delay

D

Deactivate fan delay pulse plus feature.

pulse plus feature, this feature may be activated.

D

If control configuration has solid state digital con-

D

Deactivate the pulse or cycle feature.
trols with pulse or cycle feature, this feature may
be activated.

4 --- 1

POSSIBLE CAUSE(S) SUGGESTED REMEDY

Symptom #3 --- Heat system does not recover quickly

D

One, two or all three of the elements are bad.

D

208 volt = 12.3--- 13.6 Ω
220 volt = 13.8--- 15.2 Ω
240 volt = 16.4 ---18.1 Ω
440 volt = 58.0--- 61.0 Ω
480 volt = 65.6--- 72.6 Ω

D

Dropped a phase from circuit breaker at electri-

D

cal panel.

D

Dropped phase at contactor.

D

The oven is out of calibration.

D

D

TROUBLESHOOTING

Replace bank of elements. Reference electrical

specifications on page NO TAG of the Introduc-

tion for amp draw.

Check for voltage at the terminal block in the

oven across L1 --- L2, L2---L3, and L1 --- L3. The

voltage should match the supply to the building.

If voltage is not present across any phase call the

electrician. Check for voltage at the contactor on

t e r m i n a l s T 1 --- T 2 , T 2 --- T 3 a n d T 1 --- T3 . M a k e s u r e

the appliance is calling for heat. If voltage is not

present across any phase, replace the contactor.

Reference the calibration procedures for the con-

troller configuration on your appliance. See

p a g e s 3 --- 2 t h r o u g h 3 --- 11 o f t h e C a l i b r a t i o n a n d

Adjustment section.

D

Inadequate voltage supplied for oven configura­tion. (ie. 240 volt oven in a 208 volt environment)

D

Change the element configuration to match the

incoming voltage. Transformers may also need

to be added for some applications.

Symptom #4 --- Heat system does not heat, but motor operates

D

Temperature controller set point below actual.

D

Probe shorted or open.

D

Raise set point.

D

Take the resistance reading. Reference pages

3 --- 1 3 t h r o u g h 3 --- 1 6 o f t h e C a li b r a t io n a n d A d j u st -

ment section for probe resistance information. Re-

fer to page 2- --2 for wiring diagram P/N 18459.

For solid state manual controls, remove the wires

on terminals #6 and #7 on the solid state board.

Touch the wires together to allow the contactor to

power up. If the contactor closes, the problem is

in the temperature control circuit (consisting of

the board, probe and potentiometer). This is only

a test. DO NOT leave the oven during this test.

If the contactor closes place an ohm meter across

the probe wire. Note the resistance reading of the

probe as the temperature in the oven increases. At

no time should the probe go infinite or open before

the oven reaches 500_F (260_C). If it does the

probe is bad and should be replaced.

4 --- 2

MARK V

POSSIBLE CAUSE(S) SUGGESTED REMEDY

D

Potentiometer is bad.

D

Temperature control board is bad.

D

D

TABLE 1

The potentiometer is approximately 900Ω and

canalsobetestedwithanohmmeter.Connect

the test leads to the two outside wires of the po-

tentiometer to get the value of the pot. Leave one

lead connected to the outer wire of the poten-

tiometer. Move the other lead to the middle wire

of the potentiometer. To check the variable resist-

ance, turn the stem clockwise or counter clock-

wise. The reading should change from 0Ω to the

full value of the potentiometer.

Move the test lead from the outer wire to the other

outer w ire of the potentiometer. Leave t he middle

lead connected to your meter. Turn the stem

again to see the reverse effect.

If both the probe and the pot are good and the the

heating system does not work the temperature

control board must be bad. Replace the board.

DISPLAY ERROR CODES

INTELLITOUCH

HELP the temperature setting exceeds the maxi-

mum setting of 550_F. T h i s w i l l b e s h o w n a s
an alternating HELP and PROB display.

PROB 1. Defective temperature probe.

2. Stripped insulation on probe wires.

3. Poor connection of probe terminals.

4. Probe sensing temperatures above or
below the probe sensing range.

8888 an Intellitouch computer failure.

INTELLIHOLD AND INTELLIPLUS

F2 Actual oven temperature is greater than the

maximum temperature setpoint

F3 Open temperature sensor
F4 Shorted temperature sensor while the con-

trol is in the cook mode.

F6 The 50/60 Hz input does not change states.
F7 Total chain timer over 24 hours
F8 The calculated EEPROM check sum is not

the same as the expected check sum re­trieved from the EEPROM.

BLODGETT IQ CONTROL

NOTE: The error codes will appear in the top dis-

play. All error codes are accompanied by
an audible alarm.

Hi Oven temperature is more than

40_F above the highest setpoint.

Prob Probe failure at greater than 693_F.

Probe (with alarm) --- shorted temperture

probe.

HEAT ERR From a cool start (below 140_F), the

oven takes more than 10 minutes to
climb from 150-300_F.

FAN ERR Control thinks motor is not operating

FAN C ERR usually occurs when dirt or grease

collects on the veins of the blower
wheel causing centrifugal switch to
remain closed too long.

DOOR OPEN Occurs when a timer is activated

and the door is open. This fault self
clears once the door is closed.

4 --- 3

CHAPTER 5

PARTS REPLACEMENT

MARK V

DOOR ASSEMBLY

DOOR

1. Open the door. Remove the handle from the
left hand door.

2. Remove the three (3) machine screws located
along the bottom edge of the door.

3. Lift the door slightly. Pull forward until it clears
the support.

4. To remove from the oven, pull the door down
until the hinge pin is clear.

5 . R e v e r s e s t e p s 1 --- 4 t o r e p l a c e .

Sprocket

DOOR ARM SUPPORT ASSEMBLY

Replacement

1. Remove the trim cover.

2. Removethedoorsasdescribed.

3. Remove the five bolts holding the door arm
support to the oven frame.

4. Remove and replace the door arm a ssembly.

Rebuilding

The door arm support assembly contains five re­placeable parts.

D

Chain and Turnbuckle

D

Left Hand Door Arm

D

Right Hand Door Arm

D

Sprockets

D

Door Switch Cam

Use the following steps to rebuild a door arm sup­port assembly.

1. Remove the assembly from the oven as de­scribed.

Turnbuckle

Sprocket

FIGURE 1

2. Remove the spiral pins from the left hand door
arm support and sprocket assembly. Remove
the left hand door arm support from the
sprocket assembly.

Repeat for the right hand door.

3. Install the new parts as needed.

4. Reverse this procedure to install the assembly.

5 --- 1

PARTS REPLACEMENT

WINDOW ASSEMBLY

1. Remove the door as described. Place the door
on a flat surface with the front facing up.

2. Remove the outer door skin. Turn the door
onto its back.

3. Use the window insertion t ool to pry up the cor­ners of the window assembly in the following
order:

A.) Bottom right (farthest from the hinge pin)

B.) Bottom left

C.) Top right

D.) T op left (closest to the hinge pin)

NOTE: The window insertion tool is provided

with the window assembly.

4. Use the window insertion t ool to pry up the cor­ners of the window assembly.

5 . R e v e r s e s t e p s 1 --- 4 t o r e p l a c e .

NOTE: To install the door front start at the cor-

ner closest to the hinge pin.

COMPARTMENT LINER B OTTOM

1. Remove the racks, rack supports and blower
wheel cover.

2. Remove the bottom perimeter door gasket.

3. Remove the screws s ecuring the front, back
and sides of the liner bottom.

4. Pull the compartment liner bottom forward.

5 . R e v e r s e s t e p s 1 --- 4 t o r e p l a c e .

Compartment

Liner Bottom

FIGURE 2

FIGURE 1

Hinge Pin

Window
Insertion Tool

5 --- 2

MARK V

MOTOR AND BLOWER AS SEMBLY

BLOWER WHEEL

For units with built in wheel puller:

1. Remove the racks and rack supports.

2. Remove the blower wheel cover.

3. Loosen the set screws in the blower wheel
hub. See FIGURE 3.

4. Screw a 3/8”-16 bolt into the threaded hole of
the blower wheel. Draw the wheel forward from
the shaft. See FIGURE 3.

5. Lubricate the motor shaft with graphite. Main­tain a 1/8” gap between the back of the blower
wheel and the back wall of the oven liner.

6 . R e v e r s e s t e p s 1 --- 5 t o r e p l a c e .

For wheels with slot on hub:

1. Use a wheel puller.

MOTOR

If access to the rea r of the oven is available:

1. Remove the blower wheel.

2. Loosen the motor attachment bolts.

3. Remove the motor conduit.

4. Lift the motor from the mounting bracket.

5 . R e v e r s e s t e p s 1 --- 4 t o r e p l a c e .

If access to the rear of the oven is not available:

1. Remove the blower wheel.

2. Pull the lower heat collector forward and down.

3. Remove the eight (8) 1/4” nuts from the motor
panel.

4. Pull the motor panel forward into the oven. Dis­connect the motor wiring conduit.

5 . R e v e r s e s t e p s 1 --- 4 t o r e p l a c e .

3/8” Bolt

See View A

Set Screw

Motor

Blower Wheel

3/8” Bolt

View A

FIGURE 3

5 --- 3

ELECTRICAL COMPONENTS

PARTS REPLACEMENT

NOTE: A test cord is available to allow removal of

the control module from the oven while re­taining electrical connections.

BULB AND CAPILLARY THERMOSTAT

1. Remove the chain and turnbuckle compart­ment cover.

2. Remove the control compartment cover.

3. Remove the racks.

4. Remove the thermostat capillary bulb clips.

5. Swing the capillary bulb forward until it is at a
90_ angle with the liner side.

6. Close the doors. Pull the control module for­ward.

7. Remove the wires from the thermostat.

8. Loosen the set screw at the bottom of the ther­mostat knob. Remove the knob.

9. Remove the two (2) screws securing the ther­mostat to the front panel.

10. Feed the capillaries through the oven wa ll and
the side of the control module.

11. Remove the thermostat.

12. Reverse steps 1---11 to replace.

NOTE: Be careful not to kink the fine tubing of the

thermostat capillary.

ELECTRICAL COMPONENTSLOCATED
IN THE CONTROL MODULE

1. Remove the chain and turnbuckle compart­ment cover.

2. Remove the control compartment cover.

3. Close the doors. Pull the control module for­ward.

4. Remove the wires from the defective compo­nent.

5. Loosen the screws at t aching the component
to the control module.

Switches may be removed by depressing the
spring loaded clips.

The one hour timer is removed by loosening
the locknut.

6 . R e v e r s e s t e p s 1 --- 5 t o r e p l a c e .

NOTE: Refer to the wiring diagram to ensure cor-

rect connection of the wires.

DOOR SWITCH

1. Remove the lower trim cover.

2. Loosen the cam assembly set screw on the
right door sprocket assembly.

3. Remove the wires from the door switch.

4. Loosen the lock nut securing the door switch
to the bracket and remove.

FIGURE 4

5 . R e v e r s e s t e p s 1 --- 4 t o r e p l a c e .

Capillary
Tube

Micro Switch

FIGURE 5

5 --- 4

MARK V

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5 --- 5