Fri-Jado STG7 P User manual

USA
WWW.FRIJADO.COM Service Manual STG7 P Gas form 9123692 rev. 05/2013
MODELS
Programmable controls STG7 P
Gas types G20/25
SERVICE MANUAL
STG7 P GAS FIRED
ROTISSERIE OVEN
- NOTICE -
This manual is prepared for the use of trained Service Technicians and
should not be used by those not properly qualified. If you have atten-
ded training for this product, you may be qualified to perform all the
procedures in this manual.
This manual is not intended to be all encompassing. If you have not
attended training 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 technician.
Reproduction or other use of this Manual, without the express written
consent of Fri-Jado, is prohibited.
Model STG7 P Gas

Service Manual STG7 P Gas form 9123692 rev. 05/2013
Page 2

TABLE OF CONTENTS
Service Manual STG7 P Gas form 9123692 rev. 05/2013 Page 3
Versions
Version Issue date
dd/mm/yy
Remarks
02/2009 01/03/2012 First release.
07/2012 01/07/2012 Various adjustments.
02/2013 01/02/2013 Adjusting of power changed. Blower added in electric compart-
ment.
04/2013 01/04/2013 Adjusting power changed on pages 23 to 29. Trouble shooting ad-
justed.
05/2013 01/05/2013 Adjusting power changed on pages 23 to 29.

TABLE OF CONTENTS
Service Manual STG7 P Gas form 9123692 rev. 05/2013
Page 4
Index .......................................................................................................................................................... 4
General technical data.............................................................................................................................. 6
Programming instructions........................................................................................................................ 7
Removal and replacement of parts for the STG7 P Gas ....................................................................... 11
Right or left side panel........................................................................................................................ 11
Top cover .............................................................................................................................................. 11
Knob ..................................................................................................................................................... 11
Instrument panel ................................................................................................................................. 12
Tumble switch reset ............................................................................................................................. 12
Electric panel........................................................................................................................................ 12
Display .................................................................................................................................................. 13
Panel and keypad assembly ................................................................................................................ 13
Namepanel........................................................................................................................................... 13
Halogen lamp holder (customer side) ................................................................................................ 14
Halogen lamp holder (service side) .................................................................................................... 14
Power section....................................................................................................................................... 15
Safety thermostat ............................................................................................................................... 15
Main switch.......................................................................................................................................... 16
Blower motor....................................................................................................................................... 16
PT500 sensor......................................................................................................................................... 17
Drive motor.......................................................................................................................................... 17
Gas mixture blower ............................................................................................................................. 18
Gas burner safety control.................................................................................................................... 18
Gas control block ................................................................................................................................. 19
Ignition/Ionization set ......................................................................................................................... 19
Board speed control blower................................................................................................................ 19
Relay and base relay............................................................................................................................ 20
Rectifier ................................................................................................................................................ 20
Ring core transformers ........................................................................................................................ 20
Door adjustment (left side) ................................................................................................................. 21
Door glass inside.................................................................................................................................. 21
Door glass outside ............................................................................................................................... 21
Changing an orifice and air inlet........................................................................................................ 22
INDEX

TABLE OF CONTENTS
Service Manual STG7 P Gas form 9123692 rev. 05/2013 Page 5
Working of gas fired rotisserie .............................................................................................................. 23
Gas technical data................................................................................................................................ 24
Electrical tests and service procedures.................................................................................................. 25
PT500 sensor test ................................................................................................................................. 25
Keypad test .......................................................................................................................................... 25
Adjustment of board for speed/power regulation............................................................................ 26
Temporary bridging of reset switch ................................................................................................... 27
Gas block Honeywell type VK4115V................................................................................................... 28
Adjusting of the power for Natural gas and Propane ...................................................................... 29
Ignition/Ionization set ......................................................................................................................... 30
Control location................................................................................................................................... 31
Troubleshooting for the STG7 P Gas Rotisseries................................................................................... 32
Exploded views & partlists..................................................................................................................... 34
STG7 P Gas - sheet iron work .............................................................................................................. 34
STG7 P Gas - components .................................................................................................................... 36
Electrical diagrams.................................................................................................................................. 39
STG7 P Gas - circuit diagram ............................................................................................................... 39
STG7 P Gas - wiring diagram............................................................................................................... 40
STG7 P Gas - wiring diagram (till serial number 100054530) ............................................................ 41

GENERAL TECHNICAL DATA
Service Manual STG7 P Gas form 9123692 rev. 05/2013
Page 6
GENERAL TECHNICAL DATA
This manual covers the STG 7 P gas fired rotisserie ovens suitable for G 20/25 (natural gas).
• STG7–Ovenwithsevenspits(28to35chickens).
Alloftheinformation,illustrationsandspecicationscontainedinthismanualarebasedon
thelatestproductinformationavailableatthetimeofprinting.
Note: From Dec. 2008 on the gas pipe ends under the STG 7 instead of at the rear end.
A knee piece and an 8 inch nipple (NPT to BSP thread) are delivered with the unit.
Type STG 7
Power(W) 345
Gaspower(BTU-KW) 49.500-14.5
Fusesneededwithpowerconnection115V,1N~50…60Hz
(1phasewithzero) 1x15A
Standardplugfromfactory NEMA5-15
Netweight 204kg 450lbs
Grossweight 230kg 507 lbs
Height 1025mm 401/4inch
Width 985mm 383/4inch
Depth 850mm 331/2inch
Tools
• Standardsetoftools.
• Metricwrenches,socketsandhexsocketkeywrenches.
• Multi-meterandACcurrentclamptester.
• Temperaturetester.
• Insulationvaluetester(Megger).
• Toxicitymeter.
• Gaspressuremeter.
• FieldServiceGroundingKit.
TECHNICAL DATA

Temperature Display
Program indicators
Program keys
Buzzer key
Probe key
Temperature key
Up-Down key
Time key
Time display
Temperature hold indicator
Second step indicator
First step indicator
Start/Stop
Rotor key
Time of day
Program end
Second cooking step
First cooking step
Temperature hold process
8888888410 0030
Service Manual STG7 P Gas form 9123692 rev. 05/2013 Page 7
PROGRAMMING INSTRUCTIONS
When the main switch is tuned to “1” the
display lights up and the rotisserie is ON.
PROGRAMMING INSTRUCTIONS
DISPLAY AND KEYS
SETTING THE STG

888410 88881040 888p16 888815pr
888p01 8888prog 888000 88880040
888410 88880040 888000 88880030
Service Manual STG7 P Gas form 9123692 rev. 05/2013
PROGRAMMING INSTRUCTIONS
Page 8
Press and hold Time of
day key
Press Up or Down key
Release Time of day key
After the unit is
switched-on the time
display indicates: 15PR
Key 1:
1x = program 01
2x = program 06
3x = program 11
Key 2:
1x = program 02
2x = program 07
3x = program 12
Select Program number
Press both Up and Down
keys during 2 seconds
Press Cooking process
key
Cooking symbol lights
up
Press and hold the Time
key
Press Up or Down key
Press Grilling process key
Grilling symbol lights up
Press and hold the Time
key
Press Up or Down key
Press and hold the
Temperature key
Press Up or Down key
SETTING ACTUAL TIME 15 PROGRAMS
ENTERING A PROGRAM FIRST COOKING STEP (TIME)
SECOND COOKING STEP (TIME)FIRST COOKING STEP (TEMP.)

OPTIONAL SETTINGS
888350 88880030 888185 88880000
888185 88880000 888000 88880040
888350 88880046 888p01 88881055
Service Manual STG7 P Gas form 9123692 rev. 05/2013 Page 9
PROGRAMMING INSTRUCTIONS
Press Temperature Hold
process key
Temperature Hold
symbol lights up
Press and hold the
Temperature key
Press Up or Down key
Press Start / Stop key
On indicator lights up
Press Rotor key to start
turning the rotor
Press Rotor key again to
stop
Load the rotisserie with
products
Press and hold Tempera-
ture key
Press Up or Down key
Press program number
to load pre-set values
Press Rotor key
Heaters and front lamp
switch off
Rotor stops
On indicator is blinking
Process time in hold
Select a pre-defined
program
Press and hold Buzzer
key
Press Down key
SECOND COOKING STEP (TEMP.) TEMPERATURE HOLD
LOADING PROGRAM PROGRAM START & LOADING
INTERRUPTING ACTIVE PROGRAM SET ADDITIONAL BUZZER SIGNAL

888p01 88881030 888390 88880040
888390 88880035 888prh 88880059
888185 88880046
Service Manual STG7 P Gas form 9123692 rev. 05/2013
PROGRAMMING INSTRUCTIONS
Page 10
Select a pre-defined
program
Press and hold the
Program end key
Press Up key
Press and hold Tempera-
ture or Time key
Adjust temperature or
time with Up or Down
key
Select a pre-defined
program
Press Cooking, Grilling
or Temperature hold key
No time indication for
Temperature hold
Visible during process or
program selection
Press the Rotor key
Insert the probe in the
meat up to the core
Press Temperature sen-
sor key; after 20 seconds
the temperature reading
switches off
Under 40°C (104°F) the
display shows PRH
• Process indicators shows actual process.
After completion indicator switches off
• Time display shows remaining program
time which is the sum of the remaining
cooking and grilling time
• Temperature display indicates actual tem-
perature in the grill. Under 40°C(104°F)
the display shows PRH (preheat)When
remaining time reaches 0, the process
indicators and the On-indicatorswitches
off
SET PROGRAM END TIME DISPLAY SET TIME & TEMPERATURE
ADJUSTING ACTIVE PROGRAM
TEMPERATURE PROBE (OPTIONAL)
PREHEAT INDICATION
INDICATIONS DURING PROCESS

Service Manual STG7 P Gas form 9123692 rev. 05/2013 Page 11
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the screws that secure the panel
to the frame.
2. Remove the panel.
3. Reverse the procedure to install.
1. Remove the left side panel according prior
procedure.
2. Remove the screws securing both large
and small top covers.
3. Remove the small cover.
4. Remove the large top cover. (Lift at left
side and remove to the left).
5. Reverse the procedure to install.
1. Remove cover plate on the knob with a
small screw driver.
2. Loosen the screw inside the knob.
3. Remove the knob with ring.
4. Reverse the procedure to install.
Note: check that the ring behind the knob is
in the right position and runs free from the
panel.
WARNING: Disconnect the electrical power to the machine at the main circuit
box. Place a tag on the circuit box indicating the circuit is being serviced.
REMOVAL AND REPLACEMENT OF PARTS FOR THE STG7 P GAS
RIGHT OR LEFT SIDE PANEL
TOP COVER
KNOB

Service Manual STG7 P Gas form 9123692 rev. 05/2013
Page 12
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel according prior
procedure.
2. Remove the knobs according prior proce-
dure.
3. Remove the screw that secures the panel.
4. Remove the 2 bolts on the backside of the
instrument panel.
5. Remove the screws that secure the meat
probe holder and remove the holder (if
supplied).
6. Remove the flatcable on the power section.
7. Remove the clip on the back, top left side
that secures panel and frame.
8. Remove the instrument panel.
9. Reverse the procedure to install.
1. Remove the instrument panel according
prior procedure.
2. Remove on the front side the screws that
secure the panel.
3. Remove on the inside bottom of the elec-
tric panel the bolt and nuts.
4. Disconnect the wiring.
5. Slide the electrical panel backwards.
6. Reverse the procedure to install.
1. Remove the right side panel according prior
procedure.
2. Remove the wiring.
3. Remove the switch by pushing the clamps
with a screw driver.
4. Reverse the procedure to install.
INSTRUMENT PANEL
ELECTRIC PANEL
TUMBLE SWITCH RESET

Service Manual STG7 P Gas form 9123692 rev. 05/2013 Page 13
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel according
prior procedure.
2. Disconnect the flatcable on the display.
3. Remove the clip on the back, top left side
that secures panel and frame.
4. Remove the nuts and washers on the back-
side of the display and remove the metal
cover.
5. Remove the nuts and plastic rings that
secure the board and remove the board. Do
not forget to disconnect the blue connector
on the board.
6. Reverse the procedure to install.
1. Remove the instrument panel according
prior procedure.
2. 2. Remove the display according prior
procedure.
3. Remove the nuts that secure the panel with
foil and remove panel.
4. Reverse the procedure to install.
1. Remove the instrument panel according
prior procedure.
2. Remove the 4 nuts that secure the panel
and remove panel.
3. Reverse the procedure to install.
DISPLAY
PANEL AND KEYPAD ASSEMBLY
NAMEPANEL

Service Manual STG7 P Gas form 9123692 rev. 05/2013
Page 14
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the top cover according prior
procedure.
2. Remove the wiring of the lamp on the
connector.
3. Remove the cap nuts that secure the air
suction plate and remove this plate.
4. Remove the glass and lamp from the lamp
holder. Turning direction of glass in counter
clockwise.
5. Remove the holder. You have to deform the
holder to take it out.
6. Insert a new holder and click this in.
7. Reverse the procedure to install.
HALOGEN LAMP HOLDER (CUSTOMER SIDE)
1. Remove the top cover according prior
procedure.
2. Remove the wiring of the lamp on the
connector.
3. Remove the glass and lamp from the lamp
holder. Turning direction of glass in counter
clockwise.
4. Remove the holder. You have to deform the
holder to take it out.
5. Insert a new holder and click this in.
6. Reverse the procedure to install.
HALOGEN LAMP HOLDER (SERVICE SIDE)

JP3 & JP4
Service Manual STG7 P Gas form 9123692 rev. 05/2013 Page 15
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the rotor and the right side panel
according prior procedure.
2. Remove the bolts that secure the air guide
plate and remove this plate. Lower the
plate in vertical position and lift it out of
the hinge pins.
3. Remove the thermostat-probe from the
clip in the oven and guide it outside
through the opening in the side wall.
4. Disconnect the wiring on the thermostat.
5. Remove the screws on the electric panel
that secure the thermostat and remove the
thermostat.
6. Reverse the procedure to install.
Note: Set the new thermostat to its maximum
position by turning it clockwise (320°C/608°F).
SAFETY THERMOSTAT
1. Remove the right side panel according
prior procedure.
2. Disconnect wiring and flatcable on the
board.
3. Remove the board from the clips by press-
ing the clips together.
4. Reverse the procedure to install.
Note: When installing new board, ensure that
JP3 and JP4 on new board are set the same as
on the old board.
POWER SECTION

Service Manual STG7 P Gas form 9123692 rev. 05/2013
Page 16
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel, the top cover
and the air suction plate according prior
procedures.
2. Remove the wing nut on the fan blade and
remove fan blade. (Left handed threads).
3. Disconnect wiring of the motor.
4. Remove the screws that secure the motor
and remove the motor.
5. Reverse the procedure to install.
Note: The blowers are equipped with a
capacitor. Check the direction of rotation of
the motor (clockwise) and change the wiring if
necessary.
BLOWER MOTOR
1. Remove the instrument panel according
prior procedure.
2. Loosen the screws on the electric panel that
secure the switch.
3. Remove the switch and disconnect the
wiring.
4. Reverse the procedure to install.
Note: The old version main switch is used until
serial number 100052400.
MAIN SWITCH
Old version
main switch

Service Manual STG7 P Gas form 9123692 rev. 05/2013 Page 17
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel according
prior procedure.
2. Disconnect the wiring of the sensor.
3. Remove the screw that secures the sensor
and remove the sensor.
4. Reverse the procedure to install.
Note: The wiring cable is an insulated cable
with an earthing screen.
PT500 SENSOR
1. Remove the right side panel and rotor discs
according prior procedure.
2. Disconnect the wiring of the motor. Check
where the wire, marked A is connected.
3. Remove the screws that secure the fan
cover and remove the cover.
4. Set the drive arm in a position vertical
downwards. This can be done manually or
by turning the fan blade by hand.
5. Mark the position of the motor support
with a marker.
6. Remove the bolts that secure the motor
and the nuts that secure the motor support
and remove the motor.
7. Check the white Teflon ring. Replace if
necessary.
8. Install the fan blade on the new motor.
9. Reverse the procedure to install.
Note: Always make a test run on maximum
temperature to insure the motor is well
mounted and adjusted.
DRIVE MOTOR

A
B
Service Manual STG7 P Gas form 9123692 rev. 05/2013
Page 18
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel according prior
procedure.
2. Remove the wiring from the control.
3. Remove the screw that secures the control
and remove the control by lifting it up-
wards.
4. Reverse the procedure to install.
1. Remove the right side panel and small top
cover plate according prior procedures.
2. Remove the wiring from the top of the gas
mixture blower
3. Remove the silencer.
4. Remove the 4 nuts from the air inlet (A)
and the 4 long screws from the gas mixture
blower (B) and remove the gas mixture
blower.
5. Remove the screws that secure the venture
to the blower and remove the blower.
6. Reverse the procedure to install.
Note: When replacing the air inlet see to it
that the text is visible from the right hand side.
GAS BURNER SAFETY CONTROL
GAS MIXTURE BLOWER

A
B
C
C
B
A
Service Manual STG7 P Gas form 9123692 rev. 05/2013 Page 19
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel and the gas
burner safety control according prior
procedures.
2. Remove the 4 long screws from the gas
mixture blower.
3. Remove the wiring.
4. Remove the screws from the pipe clamps.
5. Remove the screws that secure the flange
to the block and remove the control block.
6. Reverse the procedure to install.
GAS CONTROL BLOCK
1. Remove the right side panel according
prior procedure.
2. Remove the wiring from the set on the gas
burner safety control.
3. Remove the nuts that secure the set and
remove the set. Check the gasket and
replace if necessary.
4. Reverse the procedure to install.
5. Connect A to A , B to B and C to C. ,
the fastons for B and C are the same,
(2.8 mm - .110”) the faston for A is bigger
(4.8 mm - .188”)
IGNITION/IONIZATION SET
1. Remove the right side panel according prior
procedure.
2. Remove the screws that secure the board
and remove the board.
3. Reverse the procedure to install.
Note: See page 25 for adjustment of speed
regulation.
BOARD SPEED CONTROL BLOWER

Service Manual STG7 P Gas form 9123692 rev. 05/2013
Page 20
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel according prior
procedure.
2. Remove wiring of relay.
3. Slide base from rail.
4. Reverse the procedure to install.
RELAY AND BASE RELAY
1. Remove the right side panel according prior
procedure.
2. Remove the wiring from the transformer.
3. Remove the screw and nut that secure the
transformer and remove the transformer.
4. Reverse the procedure to install.
RING CORE TRANSFORMERS
1. Remove the right side panel according prior
procedure.
2. Remove the wiring of the rectifier.
3. Remove the nut that secures the rectifier
and remove the rectifier.
4. Reverse the procedure to install.
RECTIFIER