Blodgett SG3240E Service Manual
SMART GENERATION
CONVEYOR OVEN SERIES
SERVICE AND REPAIR MANUAL
BLODGETT OVEN COMPANY
www.blodgett.com
50 Lakeside Avenue, Box 586, Burlington, Vermont 05402 USA Telephone, (802) 658Ć6600 Fax: (802)864Ć0183
PN M10306 Rev C (11/01)
E 2001 - G.S. Blodgett Corporation
TABLE OF CONTENTS
This page intentionally left blank.
ii
TABLE OF CONTENTS
1. INTRODUCTION
Oven Specifications 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ventilation Requirements 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Specifications 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Specifications 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. OPERATION
Standard Manual Control 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programmable Menu Control 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oven Adjustments for Cooking 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Schematics 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SG2136G 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SG2136E - 2 Wire 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SG2136E - 3 Wire 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SG2136E - 4 Wire 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SG3240G 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SG3240E - 3 Wire 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SG3240E - 4 Wire 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. CALIBRATION AND ADJUSTMENT
Control Identification and Registration 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Pressure Adjustments 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convection Blowers 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Calibration 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Belt Speed Calibration 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. PARTS REPLACEMENT
PLC Replacement and Programming 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interface Board 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circulating Fan Pressure Switch 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combustion Pressure Switch Adjustment 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. TROUBLESHOOTING
Fault Display Indicators 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Drive System 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heating System 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convection System 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference Tables 5-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heating Element Resistance 5-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Probe Resistance vs Temperature 5-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
i
TABLE OF CONTENTS
This page intentionally left blank.
ii
CHAPTER 1
INTRODUCTION
SMART GENERATION
OVEN SPECIFICATIONS
VENTILATION REQUIREMENTS
A mechanically driven ventilation system is reĆ
quired for the removal of excess heat and cooking
vapors. For gas models, a ventilation system is
also required for the removal of the products of gas
combustion. The necessity for a properly designed
and installed ventilation system cannot be over
emphasized.
The following are general recommendations and
guidelines for good ventilation. Your specific apĆ
plication may require the services of a ventilation
engineer or consultant
The ventilation hood must work well with the building
heating, ventilation and air conditioning (HVAC) sysĆ
tem. The hood exhaust and the supply air flows
should be sized appropriately. Supply air must be
provided by either the hood system or the building
HVAC system in order to prevent a negative presĆ
sure in the oven area. Supply air should replace
approximately 80% of the air flow exhausted by the
hood. The table below can be used as a guideline,
but the correct air flow values depend on the effiĆ
ciency of the hood design, the amount of air flow
around the oven, and the current air flow in and out
of the kitchen or oven area (for existing facilities).
inĆline tempering unit. Air supplied directly from outĆ
side the building to the kitchen or oven area, nonĆ
tempered, can be used as supply air but the design
must accommodate potential operational and enviĆ
ronmental drawbacks.
NOTE: In NO case should supply air blow at or
near the cooking chamber openings as
that would adversely affect the cooking
consistency and the reliability of the oven.
The hood should be sized to completely cover the
equipment plus an overhang of at least 6" (15cm)
on all sides not adjacent to a wall. The distance
from the floor to the lower edge of the hood should
not exceed 7' (2.1m). See FIGURE 2.
U.S. and Canadian installations
Refer to your local ventilation codes. Requirements
may vary by city, county, province or state. In the
absence of local codes, refer to the National venĆ
tilation code titled, Standard for the Installation of
Equipment for the Removal of Smoke and Grease
Laden Vapors from Commercial Cooking EquipĆ
ment", NFPAĆ96ĆLatest Edition.
General export installations
MODEL SINGLE DOUBLE TRIPLE
Exhaust Volume - CFM (M3/min)
SG2136 400Ć500
(14Ć17)
SG3240 800Ć1000
(23Ć28)
Supply Requirements - CFM (M3/min)
SG2136 320Ć400
(12Ć14)
SG3240 640Ć800
(18Ć23)
Ideally, supply air is provided through the building
HVAC system or, secondly, through the hood with an
800Ć1000
1200Ć1600
640Ć800
960Ć1280
TABLE 1
(23Ć28)
(34Ć46)
(18Ć23)
(27Ć36)
1200Ć150
0 (34Ć43)
2000Ć240
0 (57Ć68)
960Ć1200
(27Ć34)
1600Ć192
0 (46Ć54)
Installation must conform with Local and National
installation standards. Local installation codes
and/or requirements may vary. If you have any
questions regarding the proper installation and/or
operation of your Blodgett oven, please contact
your local distributor. If you do not have a local disĆ
tributor, please call the Blodgett Oven Company at
0011Ć802Ć860Ć3700.
WARNING:
Failure to properly vent the oven can be hazardĆ
ous to the health of the operator and may result
in operational problems, unsatisfactory baking
and possible damage to the equipment.
Damage sustained as a direct result of improper
ventilation will not be covered by the ManufacturĆ
er's warranty.
1-1
0" (0cm) if wall or 6" (15.2 cm)
Minimum
6" (15 .2cm)
60"
INTRODUCTION
(152.4 cm)
20"
(50.8 cm)
9"
(22.7 cm)
Triple Stack - 6.5" (17 cm)
Double Stack - 17.5" (44.5 cm)
Single Stack - 23.5" (59.7 cm)
3" (7.6 cm)
Minimum
6" (15.2 cm)
SG2136 Series Shown
64" (162.5 cm)
Minimum
FIGURE 1
1-2
SMART GENERATION
0" (0cm) if wall or
6" (15.2 cm)
3" (7.6 cm)
Minimum
6" (15 .2cm)
Minimum
77" (196 cm)
72" (182 cm)
24"
(61 cm)
14"
(35.5 cm)
Triple Stack - 7" (17.8 cm)
Double Stack - 17.25" (43.8 cm)
Single Stack - 23.25" (59 cm)
SG3240 Series Shown
6" (15.2 cm)
Minimum
FIGURE 2
1-3
ELECTRICAL SPECIFICATIONS
INTRODUCTION
SG2136G
The SG2136G requires a 5 Amp, 50/60HZ, 1,
208Ć240VAC, 3 wire service consisting of L1, L2
and ground. Use 75_C rated cable. Size wire to NaĆ
tional Electric or local codes.
SG2136E
Use 75_C rated cable. Size wire to National Electric
or local codes.
The SG2136E is available in 6 electrical configuraĆ
tions.
U.S. and Canadian installations (or similar)
D 76 amp, 60 HZ, 1, 208 VAC, 2 wire service
consisting of L1, L2, and ground.
D 66 amp, 60 HZ, 1, 240 VAC, 2 wire service
consisting of L1, L2, and ground.
D 44 amp, 60 HZ, 3, 208 VAC, 3 wire service
consisting of L1, L2, L3 and ground.
D 38 amp, 60 HZ, 3, 240 VAC, 3 wire service
consisting of L1, L2, L3 and ground.
General export installations
D 24 amp, 50/60 HZ, 3 WYE, 220/380 VAC, 4
wire service consisting of L1, L2, L3, neutral
and ground.
D 23 amp, 50/60 HZ, 3 WYE, 240/415 VAC, 4
wire service consisting of L1, L2, L3, neutral
and ground.
SG3240G
The SG3240G requires a 5 Amp, 50/60HZ, 1,
208Ć240VAC, 3 wire service consisting of L1, L2
and ground. Wiring from the power source to these
units must be a minimum of #16 AWG CU.
stranded wire or larger.
SG3240E
Use 90_C rated cable. Size wire to National Electric
or local codes.
The SG3240E is available in 4 electrical configurations.
U.S. and Canadian installations (or similar)
D 69 amp, 50/60 HZ, 3, 208 VAC, 4 wire service
consisting of L1, L2, L3, and ground.
D 80 amp, 50/60 HZ, 3, 240 VAC, 4 wire service
consisting of L1, L2, L3, and ground.
General export installations
D 41.5 amp, 50/60 HZ, 3 WYE, 230/400 VAC,
4 wire service consisting of L1, L2, L3, neutral
and ground.
D 40 amp, 50/60 HZ, 3 WYE, 240/415 VAC, 4
wire service consisting of L1, L2, L3, neutral
and ground.
THE BLODGETT CANNOT ASSUME RESPONSIĆ
BILITY FOR LOSS OR DAMAGE SUFFERED AS A
RESULT OF IMPROPER INSTALLATION.
WARNING!!
Incorrect single phase wiring may result in exĆ
tensive damage to electrical components and
fire in the electrical box.
1-4
SMART GENERATION
SG2136E Single Phase Power
L1
L2
SG2136E and SG3240E Delta Three Phase Power
U.S. and Canadian Installations (or similar)
L1
L2
L3
208Ć240
208 or 240
(typical)
OvenSupply
OvenSupply
FIGURE 3
SG2136G and SG3240G
L1
400/
415L1
208Ć240
230/
240
OvenSupply
OvenSupply
L2
SG2136E and SG3240E Wye Three Phase Power
General Export Installations
400/415
L2
400/415
L3
N
1-5
GAS SPECIFICATIONS
INTRODUCTION
GAS CONNECTIONS
Domestic and General Export installations
The gas line should be large enough to accommoĆ
date the peak demand of all the gas appliances.
TABLE 2 reflects a straight line, 50 foot run with no
coupling restrictions and no other appliances
drawing service. Gas line installations MUST conĆ
form to National Fuel Gas Code NFPA 54/ANSI
Z223.1 Sec. 1.4 (Latest Edition). TABLE 2 should
be used as a guideline only.
NOTE: For any pipe runs over 50 feet (15 m), conĆ
sult the factory.
GAS REQUIREMENTS
The firing rate for the SG3240G is 110,000 BTU/hr
(32.2 kW/hr) (116 MJ/hr). The firing rate for the
SG2136G is 60,000 BTU/hr (17.6KW) (63 MJ/hr).
SG2136G DOMESTIC AND GENERAL EXPORT
Natural Gas Propane Gas
Gas Line Sizing
Single
NOTE: For natural gas meter sizing, consult your
local gas company to ensure that your meĆ
ter will provide the proper supply.
Installations within the U.S.
1. Add the total BTU's/hr of all the gas appliances.
2. Convert BTU's to cubic ft/hr using the formula
Cu Ft/Hr = 1000 BTU/Hr for natural gas.
3. Size the meter accordingly.
Installations outside the U.S.
1. Add the total M3/min of all the appliances.
2. Size the meter accordingly.
3/4" line
3/4" line
Double
Triple
Orifice Size 3.45mm (0.136") diameter 2.08mm (0.082") diameter
Incoming Gas Pressure W.C. kPa mbar W.C. kPa mbar
Static
Operational
Manifold Burner Pressure 3.5" 0.87 8.7 10" 2.50 25.0
SG2136G CE APPROVED UNITS
Type of
Gas
G25 25 13 3,45 5,1 2 x 0,63 17,6 Nat. Gas
G20 20 8.7 3,45 5,1 2 x 0,63 17,6 Nat. Gas
G20/G25 20/25 Totally Inscrewed
G30 30/50 20 2,08 5,1 2 x 0,30 17,6 Butane
G31 30/37/50 25 2,08 5,1 2 x 0,30 17,6 Propane
Inlet
Pressure
mbars
Burner Pressure
Pressure Regulator
7"
5.5"
mbars
3/4" line
1" line
1.74
1.36
Diameter
3,45 plus
preĆinjector
TABLE 2
Injector
mm
17.4
13.7
3/4" line
3/4" line
12.5"
11"
Air
Opening
mm
5,1 2 x 0,63 17,6 Nat. Gas
Injector
Pilot
mm
3.11
2.73
Standard
Delivery
Value kW (HS)
31.1
27.4
1-6
SMART GENERATION
SG3240G DOMESTIC AND GENERAL EXPORT
Gas Line Sizing
Natural Gas Propane Gas
Single
Double
Triple
Orifice Size 4.80mm (0.189") diameter 2.82mm (0.111") diameter
Incoming Gas Pressure W.C. kPa mbar W.C. kPa mbar
Static
Operational
Manifold Burner Pressure 3.5" 0.87 8.7 10" 2.50 25.0
SG3240G CE APPROVED UNITS
Type of
Gas
G25 25 13.5 4,8 10 2 x 0,63 32,2 Nat. Gas
G20 20 8.7 4,8 10 2 x 0,63 32,2 Nat. Gas
G20/G25 20/25 Totally Inscrewed
G30 30/50 20 2,8 10 2 x 0,30 32,2 Butane
G31 30/37/50 25 2,8 10 2 x 0,30 32,2 Propane
Inlet
Pressure
mbars
Burner Pressure
Pressure Regulator
7"
5.5"
mbars
3/4" line
1Ć1/4" line
1Ć1/4" line
1.74
1.36
Injector
Diameter
4,8 plus
preĆinjector
mm
17.4
13.7
3/4" line
1" line
1Ć1/4" line
12.5"
11"
Air
Opening
mm
10 2 x 0,63 32,2 Nat. Gas
Injector
Pilot
mm
3.11
2.73
Standard
Delivery
Value kW (HS)
31.1
27.4
TABLE 3
1-7
This page intentionally left blank.
INTRODUCTION
1-8
CHAPTER 2
OPERATION
SMART GENERATION
STANDARD MANUAL CONTROL
MANUAL CONTROL DESCRIPTION
1. DIGITAL DISPLAY - two line display gives the
time, temperature and other control related inĆ
formation.
2. OVEN ON/OFF (ON/STANDBY) - controls
power to the oven.
3. TEMPERATURE KEY - press to change the
cook temperature.
1
2
4. ARROW KEYS - press to change the set time
and temperature in the display.
5. TIME KEY - press to change the cook time.
6. ENTER/RESET KEY - press to save new cook
time or temperature. Also press to silence the
alarm in case of a fault. The alarm will sound
every ten seconds until the fault clears.
3 4 5
FIGURE 1
2-1
6
OPERATION
OPERATION
NOTE: The following example is in _F. The display
will read _C if programmed in celsius.
To turn the oven on:
1. Press the OVEN ON/OFF key (2). The control
defaults to the last time and temperature setĆ
tings used.
The display reads:
NOTE: HEAT appears in the top line of the disĆ
play whenever the control calls for heat.
2. The fans begin to run. The conveyor belt beĆ
gins to travel at the set cook time. The heat
rises to the setpoint temperature.
3. When the oven reaches the set temperature,
READY and SET TEMP flash alternately in the
top line of the display and an audible alarm
sounds.
To change the cook temperature:
1. Press the TEMPERATURE key (3).
The display reads:
2. Press the ARROW keys (4) to scroll to the deĆ
sired cook temperature.
3. Press the ENTER key (6) to set the new cook
temperature.
SET TEMP XXXF HEAT
COOK TIME XX:XX
SET POINT TEMP
XXXF
To change the cook time:
1. Press the TIME key (5).
The display reads:
2. Press the ARROW keys (4) to scroll to the deĆ
sired cook time.
3. Press the ENTER key (6) to set the new cook
time.
To display the actual oven temperature:
1. Press both ARROW keys (4) .
The display reads:
2. Press the down arrow key to return the display
to the setpoint time and temperature.
To turn the oven off:
1. Press the OVEN ON/OFF key (2). The oven is
equipped with a coolĆdown feature for motor
shaft and bearing protection. This enables the
blower motor(s) to run regardless of the conĆ
troller status. The blower(s) continue to run unĆ
til the oven cools to a safe temperature.
This oven, supplied with remote control, is
equipped with an emergency shut down
switch. Should you need to stop the belt,
fans, or heat press the emergency switch.
SET COOK TIME
XX:XX
TEMP XXXF
DOWN - EXIT
2-2
Do not use the emergency switch as a
GENERAL on/off switch!
Loading...