Vulcan-Hart VC5GD User manual

FULL SIZE GAS CONVECTION
OVEN
VC5GD
- NOTICE -
This Manual is prepared for the use of trained Vulcan Service
Technicians and should not be used by those not properly
qualified.
This manual is not intended to be all encompassing. If you have
not attended a Vulcan Service School for this product, you should
read, in its entirety, the repair procedure you wish to perform to
determine if you have the necessary tools, instruments and skills
required to perform the procedure. Procedures for which you do
not have the necessary tools, instruments and skills should be
performed by a trained Vulcan Service Technician.
The reproduction, transfer, sale or other use of this Manual,
without the express written consent of Vulcan, is prohibited.
This manual has been provided to you by ITW Food Equipment
Group LLC ("ITW FEG") without charge and remains the property
of ITW FEG, and by accepting this manual you agree that you will
return it to ITW FEG promptly upon its request for such return at
any time in the future.
SERVICE MANUAL
A product of Vulcan-Hart 3600 North Point Blvd Baltimore, MD 21222
F45598 (0616)

TABLE OF CONTENTS
GENERAL .................................................................................................. 3
INTRODUCTION ....................................................................................... 3
OPERATION ........................................................................................... 3
INSTALLATION ........................................................................................ 3
LUBRICATION ......................................................................................... 3
CLEANING ............................................................................................. 3
SPECIFICATIONS ...................................................................................... 3
TOOLS ................................................................................................. 4
REMOVAL AND REPLACEMENT OF PARTS ............................................................... 5
COVERS AND PANELS ................................................................................ 5
CONTROL PANEL COMPONENTS ..................................................................... 6
COMPONENT PANEL COMPONENTS ................................................................. 7
TEMPERATURE PROBE ............................................................................... 7
GAS BURNER ......................................................................................... 8
GAS ORIFICE .......................................................................................... 9
GAS SOLENOID VALVE ................................................................................ 9
IGNITION CONTROL MODULE ....................................................................... 10
SPARK IGNITER AND FLAME SENSE ................................................................ 10
BLOWER ............................................................................................. 11
MOTOR ............................................................................................... 12
DOOR SWITCH ....................................................................................... 13
ROLLER LATCH ASSEMBLY (INDEPENDENT DOORS) ............................................... 14
DOOR REMOVAL ..................................................................................... 14
HIGH LIMIT THERMOSTAT ........................................................................... 14
INTERIOR LIGHTS .................................................................................... 15
COOLING FAN ........................................................................................ 15
SERVICE PROCEDURES AND ADJUSTMENTS ........................................................... 17
TEMPERATURE CONTROL CALIBRATION ........................................................... 17
SOLID STATE TEMPERATURE CONTROL TEST ..................................................... 18
TEMPERATURE CONTROL BOARD FAULT INDICATOR .............................................. 18
TEMPERATURE PROBE TEST ....................................................................... 19
GAS VALVE PRESSURE CHECK ..................................................................... 19
VERIFICATION OF SPARK AT IGNITOR .............................................................. 20
BLOWER ADJUSTMENT .............................................................................. 20
DOOR STRIKE ADJUSTMENT INDEPENDENT DOORS) .............................................. 21
ELECTRICAL OPERATION ................................................................................ 22
COMPONENT FUNCTION ............................................................................ 22
COMPONENT LOCATION ............................................................................. 23
SEQUENCE OF OPERATION ......................................................................... 28
DIAGRAMS ............................................................................................... 31
WIRING DIAGRAM AND SCHEMATIC ................................................................. 31
TROUBLESHOOTING ..................................................................................... 34
ALL MODELS ......................................................................................... 34
FULL SIZE GAS CONVECTION OVEN
© VULCAN 2016
F45598 (0616) Page 2 of 35

GENERAL
INTRODUCTION
Models
MODEL
FEATURES
CAVITY DEPTH TEMPERATURE
CONTROL
DOORS
(50/50)
VC5GD 26.5" Solid State Independent 1 2
1 Simultaneous doors are optional (with or w/o window).
2 Stainless steel doors with window (standard).
OPERATION
Refer to Operator's manual for operation instructions
(F31123), located on Vulcan Resource Center.
https://my.vulcanfeg.com/resourcecenter/
vulcanwolfberkel/default.aspx
INSTALLATION
Detailed installation instructions (F31123) are located
on the Vulcan resource center.
https://my.vulcanfeg.com/resourcecenter/
vulcanwolfberkel/default.aspx
LUBRICATION
Refer to Lubrications Manual F20067 for current
values.
CLEANING
Refer to Operator's manual for cleaning instructions,
located on Vulcan Resource Center.
https://my.vulcanfeg.com/resourcecenter/
vulcanwolfberkel/default.aspx
SPECIFICATIONS
Electrical
Voltage Amps
120/60/1 8.0
Input BTU Rating
Fuel BTU
Natural Gas 50,000 input at 5 in. W.C.
Propane 50,000 input at 10.0 in. W.C.
Gas Line Pressures
Fuel Recommended Minimum (in. W.C.) Recommended Maximum (in. W.C.)
Natural Gas 8.0, 6.0 14.0
Propane 11.0 14.0
FULL SIZE GAS CONVECTION OVEN - GENERAL
Page 3 of 35 F45598 (0616)

TOOLS
Standard
• Standard set of Hand Tools.
• VOM with minimum of NFPA-70E CATIII 600V,
UL/CSA/TUV listed. Sensitivity of at least 20,000
ohms per volt and the ability to measure DC
micro amps. Meter leads must also be rated at
CAT III 600V.
• Clamp on type amp meter with minimum of
NFPA-70E CAT III 600V,UL/CSA/TUV listed.
Special
• Temperature Tester (Thermocouple Type).
• Manometer.
FULL SIZE GAS CONVECTION OVEN - GENERAL
F45598 (0616) Page 4 of 35

REMOVAL AND REPLACEMENT OF PARTS
COVERS AND PANELS
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Bottom Front Cover
1. Remove four screws, two from each side of
bottom cover, then remove cover from oven.
Fig. 1
2. Reverse procedure to install. Verify bottom cover
is seated under front plate.
Fig. 2
Right Side - Front Panel
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Loosen two screws near front of oven, which
secure bottom front cover.
2. Loosen screws on left side of front panel and top
cover screw.
3. Remove screws along right side and bottom of
front panel.
Fig. 3
4. Slide right side front panel out.
5. Reverse procedure to install.
Right Side - Rear Panel
1. Remove two middle screws along right side of
rear panel.
2. Remove screws along left side of rear panel.
3. Remove bottom screws on rear panel.
4. Loosen top and bottom screw along right side of
rear panel.
FULL SIZE GAS CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS
Page 5 of 35 F45598 (0616)

Fig. 4
5. Slide right side rear panel up and to the right to
remove.
6. Reverse procedure to install.
Left Side Panel
1. Remove screws along right side, middle left side,
and bottom on left side panel.
2. Loosen screws on top and bottom on left side of
panel.
3. Loosen two screws near front of oven, which
secure bottom front cover.
Fig. 5
4. Lift up and pull away to remove.
5. Reverse procedure to install.
Control Panel
1. Remove three screws on the right side which
secure the control panel then left up and pull
away.
Fig. 6
2. Disconnect the temperature probe leads from the
solid state temperature control.
3. Unplug the wire harnesses connector to control
panel components.
4. Unplug Ground wire from control panel.
5. Reverse procedure to install.
CONTROL PANEL COMPONENTS
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove CONTROL PANEL.
2. Remove component being replaced.
3. Reverse procedure to install replacement
component.
4. Check oven for proper operation.
FULL SIZE GAS CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS
F45598 (0616) Page 6 of 35

Fig. 7
NOTE: Panel with standard controls shown.
COMPONENT PANEL
COMPONENTS
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove RIGHT SIDE PANEL.
NOTE: If right side panel is not accessible, this
component can be service by removing the
CONTROL PANEL.
2. Disconnect the wire leads to component being
replaced.
3. Remove the component.
4. Reverse procedure to install component.
5. Check oven for proper operation.
TEMPERATURE PROBE
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove RIGHT SIDE PANEL.
NOTE: If right side - front panel is not accessible, this
component can be serviced by removing CONTROL
PANEL.
2. Disconnect the probe leads (1, Fig. 8) from the
solid state temperature control.
Fig. 8
3. Remove the racks from inside cavity.
4. Remove the probe guard.
FULL SIZE GAS CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS
Page 7 of 35 F45598 (0616)

Fig. 9
5. Remove probe by pushing it through the oven
wall opening (2, Fig. 8) in control panel area.
6. Reverse the procedure to install the replacement
probe.
7. Adjust the temperature control. Refer to: SOLID
STATE TEMPERATURE CONTROL TEST .
GAS BURNER
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
1. Remove BOTTOM FRONT COVER.
2. Disconnect ignition cable and the flame sense
lead wire.
Fig. 10
3. Remove bolts securing gas manifold to oven and
place manifold to the side.
Fig. 11
4. Remove screws securing the burner cover and
pull straight out.
Fig. 12
5. Grasp burner and lift out.
Fig. 13
6. Reverse procedure to install replacement burner.
NOTE: Ensure that burner positioning bracket (U-
shaped end) is inserted into slot at the rear of burner
chamber.
7. Check for proper operation.
FULL SIZE GAS CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS
F45598 (0616) Page 8 of 35

GAS ORIFICE
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
1. Remove BOTTOM FRONT COVER.
2. Remove bolts securing gas manifold to oven and
place manifold to the side.
Fig. 14
3. Remove gas orifice from spud on manifold and
replace with correct orifice for the given altitude.
Fig. 15
4. Reverse procedure to install and check for proper
operation.
GAS SOLENOID VALVE
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
1. Remove CONTROL PANEL and RIGHT SIDE
FRONT PANEL.
NOTE: if right side panel is not accessible, this
component can be serviced by just removing
CONTROL PANEL.
2. Disconnect lead wires.
3. Disconnect compression fittings to valve.
Fig. 16
4. Loosen bolts securing valve and bracket
assembly then remove screws securing valve to
bracket.
Fig. 17
5. Reverse procedure to install replacement gas
valve.
FULL SIZE GAS CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS
Page 9 of 35 F45598 (0616)

NOTE: Clean pipe threads and apply pipe joint
compound to threads. Any pipe joint compound used,
must be resistant to the action of propane gases.
All gas joints disturbed during
servicing must be checked for leaks. Check with a
soap and water solution (bubbles). Do not use an open
flame.
6. Verify gas pressure as outlined under GAS
PRESSURE ADJUSTMENT.
7. Check for proper operation.
IGNITION CONTROL MODULE
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
1. Remove RIGHT SIDE FRONT PANEL.
NOTE: If right side panel is not accessible, this
component can be serviced by removing CONTROL
PANEL.
2. Disconnect lead wires (1, Fig. 18) and igniter
cable (2, Fig. 18) from ignition module board.
Fig. 18
3. Remove the ignition module board from the
mounting bracket.
4. Reverse the procedure to install replacement
ignition module board.
SPARK IGNITER AND FLAME
SENSE
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
1. Remove GAS BURNER.
2. Remove screws securing ignitor and flame sense
to burner, then remove assembly.
Fig. 19
3. Reverse procedure to install assembly and check
for proper operation.
NOTE: Check to ensure spark gap distance is
approximately 1/8". If gap appears to be excessive or
poor sparking is occurring, then adjust.
Fig. 20
FULL SIZE GAS CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS
F45598 (0616) Page 10 of 35

BLOWER
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
Removal
1. Remove racks.
2. Lay cardboard on bottom of oven cavity to protect
surface.
3. Remove snorkel (1, Fig. 21) and baffle panel (2,
Fig. 21) mounting screws.
Fig. 21
4. Loosen set screws on blower hub.
Fig. 22
5. Remove blower from motor shaft using a bearing
puller.
Installation
1. Slide blower onto motor shaft until hub is
protruding 1/8".
Fig. 23
2. Tighten set screws ( Fig. 22) on blower hub.
3. Install snorkel (1, Fig. 21) and baffle panel (2, Fig.
21).
4. Install racks.
5. Check oven for proper operation.
FULL SIZE GAS CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS
Page 11 of 35 F45598 (0616)

MOTOR
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
1. Remove BLOWER.
2. Remove nuts (1, Fig. 24) that secure the motor
mounting plate to rear wall.
Fig. 24
3. Pull motor assembly into oven cavity and place it
on cardboard.
4. Remove junction box cover on motor, disconnect
lead wires and remove conduit.
5. Remove motor mounting bolts and flat washers
then lift the motor from mounting plate.
6. Position replacement motor on motor mounting
plate and install mounting bolts and washers.
Hand tighten mounting bolts only.
7. Reconnect lead wires at motor, replace conduit
and junction box cover.
NOTE: Check data plate on motor for wiring
schematic. Motor must rotate clockwise when viewed
from shaft end.
Fig. 25
8. Slide blower onto motor shaft until hub is
protruding 1/8".
Fig. 26
9. Tighten set screws.
FULL SIZE GAS CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS
F45598 (0616) Page 12 of 35

10. Adjust motor position until blower is parallel to
motor mounting plate as outlined under
BLOWER ADJUSTMENT.
11. Install motor mounting plate.
12. Install snorkel (1, Fig. 28) and baffle panel (2, Fig.
28).
Fig. 28
13. Remove cardboard from the bottom of the oven
cavity.
14. Install racks.
15. Check oven for proper operation.
DOOR SWITCH
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove BOTTOM FRONT COVER.
2. Unscrew nut holding door switch.
3. Pull door switch and washer out through bottom
panel opening.
Fig. 29
4. Disconnect lead wires to door switch.
5. Reverse procedure to install replacement switch.
FULL SIZE GAS CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS
Page 13 of 35 F45598 (0616)

ROLLER LATCH ASSEMBLY
(INDEPENDENT DOORS)
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove screws that attach roller latch assembly
to door.
Fig. 30
2. Reverse procedure to install.
DOOR REMOVAL
1. Open door to a 90° angle.
2. Lift door up off hinges to remove.
Fig. 31
3. Reverse procedure to install the replacement
door.
4. Check oven for proper operation.
HIGH LIMIT THERMOSTAT
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove racks.
2. Remove high limit thermostat cover/mounting
plate from inside oven cavity at the top.
Fig. 32
3. Disconnect lead wires from high limit thermostat.
NOTE: Remove old RTV sealer from cover and
mating surfaces inside oven cavity and apply new high
temperature RTV sealer before installing.
4. Reverse procedure to install.
FULL SIZE GAS CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS
F45598 (0616) Page 14 of 35

INTERIOR LIGHTS
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Do not touch the Halogen lamp with bare
hands. If lamp is exposed to oil from the skin, the life
will be reduced. Ensure lamp is free from oil and dirt
before replacing.
Bulb Replacement
1. Pull lamp cover off.
2. Grasp lamp using a clean cloth and remove from
lamp assembly.
Fig. 33
3. Reverse procedure to install new bulb.
Lamp Assembly Replacement
1. Remove racks.
2. Pull lamp cover off.
3. Remove RIGHT SIDE REAR PANEL.
Insert screw driver and push lamp assembly out
into cavity.
Fig. 34
4. Disconnect wires.
5. Reverse procedure to install new lamp assembly.
COOLING FAN
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove RIGHT SIDE FRONT PANEL.
NOTE: If right side - front panel is not accessible, this
component can be serviced by removing CONTROL
PANEL.
2. Remove wire nuts from fan wire connections.
FULL SIZE GAS CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS
Page 15 of 35 F45598 (0616)

Fig. 35
3. Loosen tab screw holding fan to component
panel.
4. Rotate tab so that fan will clear and remove fan.
5. Reverse procedure to install fan and check for
proper operation.
NOTE: Fan must be installed so air is pulled from
outside the rear of oven and blown into control area.
The arrow on the fan body indicates "air flow" direction
and should be pointing toward controls.
FULL SIZE GAS CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS
F45598 (0616) Page 16 of 35

SERVICE PROCEDURES AND ADJUSTMENTS
TEMPERATURE CONTROL
CALIBRATION
Certain procedures in
this section require electrical test or
measurements while power is applied
to the machine. Exercise extreme
caution at all times and follow Arc Flash
procedures. If test points are not easily
accessible, disconnect power and
follow Lockout/Tagout procedures,
attach test equipment and reapply
power to test.
NOTE: The temperature control module has a
programmable offset that can be applied to the set
temperature. This can be adjusted in 5 degree
increments up to 20 degrees in either direction.
1. Place a thermocouple in center of oven cavity.
2. Remove RIGHT SIDE FRONT PANEL to view
back of temperature control board.
3. Turn oven on and set to 350° Fahrenheit.
4. Watch the red fault indicator. If light comes on
see TEMPERATURE CONTROL BOARD
FAULT INDICATOR for troubleshooting tips. If
light stays off go to next step.
5. Allow oven to stabilize (typically 3 cycles)
6. Record temperature when heat light goes off and
comes on for at least 2 cycles.
7. Calculate differential by subtracting temperature
when lamp goes out from temperature when
lamp comes on.
Differential = (Heat Lamp OFF - Heat Lamp ON)
• If differential is less than 20 degrees,
temperature control circuit is functioning
properly. If it is more turn off oven and replace
TEMPERATURE PROBE.
• Repeat CALIBRATION steps. Calculate average
temperature (Heat Lamp OFF temperature +
Heat Lamp ON temperature divided by 2).
Average = (Heat Lamp OFF + Heat lamp on divided
by 2)
• If Average is less than 10° Fahrenheit from dial
setting, thermostat is properly calibrated.
• If it is more than 10° Fahrenheit, then complete
following steps.
1. Remove temperature control knob.
Fig. 36
2. Press and hold both + (plus) and the –
(minus) buttons for 3 seconds.
NOTE: Power light will start blinking and display will
show current offset.
FULL SIZE GAS CONVECTION OVEN - SERVICE PROCEDURES AND ADJUSTMENTS
Page 17 of 35 F45598 (0616)

3. Push “+” or “-“ button to increase or
decrease offset.
NOTE: Each press will change offset by 5 degrees.
NOTE: After 5 seconds of no activity controller will
automatically exit calibration mode.
SOLID STATE TEMPERATURE
CONTROL TEST
Certain procedures in
this section require electrical test or
measurements while power is applied
to the machine. Exercise extreme
caution at all times and follow Arc Flash
procedures. If test points are not easily
accessible, disconnect power and
follow Lockout/Tagout procedures,
attach test equipment and reapply
power to test.
1. Remove RIGHT SIDE FRONT PANEL.
NOTE: If right side panel is not accessible, this
component can be serviced by removing CONTROL
PANEL.
2. Place a thermocouple in the geometric center of
oven cavity.
NOTE: Oven temperature must be below 450°F.
3. Set the temperature control to the maximum
setting.
4. The green indicator light will flash once every 3
seconds if the board is receiving power. If it is off
the problem is not with the Temperature Control
Board. Refer to" TROUBLESHOOTING.
5. If the red fault indicator comes on count the
number of times it flashes and check
TEMPERATURE CONTROL BOARD FAULT
INDICATOR table to identify fault code.
TEMPERATURE CONTROL BOARD FAULT INDICATOR
Certain procedures in this section require electrical test or measurements while
power is applied to the machine. Exercise extreme caution at all times and follow Arc Flash
procedures. If test points are not easily accessible, disconnect power and follow Lockout/Tagout
procedures, attach test equipment and reapply power to test.
Code Description Action
1 Open Probe Verify probe is plugged in. Replace
TEMPERATURE PROBE.
2 Shorted Probe Replace TEMPERATURE PROBE.
3 No Heat Run TEMPERATURE PROBE TEST.
4 PCB Overheat Verify cooling fan works. Clean air
intake at back of oven.
5 No Output
Replace temperature control PCB.
Refer to: CONTROL PANEL
COMPONENTS
6 Output Shorted
Replace temperature control PCB.
Refer to: CONTROL PANEL
COMPONENTS
7 Call for Heat Timeout See TROUBLESHOOTING - NO
IGNITION
FULL SIZE GAS CONVECTION OVEN - SERVICE PROCEDURES AND ADJUSTMENTS
F45598 (0616) Page 18 of 35

TEMPERATURE PROBE TEST
Certain procedures in
this section require electrical test or
measurements while power is applied
to the machine. Exercise extreme
caution at all times and follow Arc Flash
procedures. If test points are not easily
accessible, disconnect power and
follow Lockout/Tagout procedures,
attach test equipment and reapply
power to test.
1. Place a shielded thermocouple in center of oven
cavity.
2. Turn oven on and set to 350° Fahrenheit.
3. Remove temperature control knob.
4. Hold down "-" (minus) button for 3 seconds to
enter diagnostic mode.
NOTE: Display should now show oven temperature
reported by probe.
5. Allow temperature to stabilize (typically 3 cycles).
• If thermocouple temperature is within 5°
Fahrenheit of display temperature, probe is
functioning properly.
• If temperature difference between
thermocouple and display is greater than 5
degrees but less than 20° Fahrenheit, refer
to: TEMPERATURE CONTROL
CALIBRATION to calibrate.
• If temperature difference is greater than 20°
Fahrenheit turn off oven, replace
TEMPERATURE PROBE, then repeat
TEMPERATURE PROBE TEST.
GAS VALVE PRESSURE CHECK
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Turn gas supply off at manual shutoff valve.
2. Remove RIGHT SIDE FRONT PANEL.
NOTE: If right side panel is not accessible, this
component can be serviced by removing CONTROL
PANEL.
3. Remove plug from manifold pressure port (1, Fig.
37).
Fig. 37
4. Install hose barb adapter and attach manometer
tube.
5. Turn gas supply to oven back ON.
6. Plug unit in and turn power switch ON.
7. Set temperature control to highest setting and
allow burner to ignite.
NOTE: The burner must be lit during test.
NOTE: Accurate gas pressure readings can only be
made with gas on and burner lit.
GAS
TYPE
PRESSURE READING (IN W.C.)
MANIFOLD LINE
RECOMMEND MIN MAX
Natural 5.0 8.0 6 14
Propane 10 11.0 11 14
NOTE: If incoming line pressure to valve is less than
minimum stated, manifold pressure will not be
maintained.
NATURAL GAS
FULL SIZE GAS CONVECTION OVEN - SERVICE PROCEDURES AND ADJUSTMENTS
Page 19 of 35 F45598 (0616)

• If incoming pressure to valve is between 6” W.C.
and 14” for Natural gas and manifold pressure is
not maintaining 5” W.C., and the cap is correctly
positioned, replace valve.
PROPANE
• 11” W.C. and 14” for Propane gas and manifold
pressure is not maintaining 10” W.C., and the cap
is correctly positioned, replace the valve.
VERIFICATION OF SPARK AT
IGNITOR
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
1. Remove BOTTOM FRONT COVER.
2. Disconnect high voltage "ignition cable" from
spark ignitor.
Fig. 38
DO NOT HOLD THE WIRE WITH
YOUR HANDS FOR THIS TEST. THE MANUAL GAS
VALVE MUST BE CLOSED.
3. Clamp ignition cable in a manner that will position
the end of cable 3/16" from oven frame (bare
metal surface).
It is critical that the cable be held
3/16" away from surface of oven frame or sparking
may not occur even though sparking circuit is
functioning properly.
Fig. 39
4. Plug oven in and set temperature control to
maximum setting.
5. Turn power switch ON.
6. Sparking should occur after a 4 second delay, for
a duration of 7 seconds, then repeat twice after
a 15 second purge time. Arching from ignition
cable to oven frame should be observed.
BLOWER ADJUSTMENT
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
1. Remove BLOWER.
2. Loosen motor mounting bolts.
3. Adjust the motor position until blower is parallel
to and 1/4 inch away from motor mounting plate.
Check for squareness of the blower to motor
mounting plate at top, bottom, left and right of
blower.
• If blower is square, tighten motor mounting
bolts and proceed to Step 4.
• If blower is not square, continue adjusting
until proper spacing is achieved, then
tighten motor mounting bolts.
NOTE: If necessary, place shims between motor and
frame.
FULL SIZE GAS CONVECTION OVEN - SERVICE PROCEDURES AND ADJUSTMENTS
F45598 (0616) Page 20 of 35