Specifications

7-29
Gas Pressure
Dean Flatbottom fryers require incoming gas pressure in the range of 6-14" WC for natural
gas, and 10-14" WC for LP. For natural gas, the valve supplies 4" WC to the burners. For
LP (including butane and butane mixtures) the valve is set at 10" WC to the burners.
Wiring Schematic
COIL
DSI IGNITION MODULE
24V
AIR
PROVER
115V
HIGH-LIMIT
THERMOSTAT
HIGH
TENSION
LEAD
SPARK
IGNITER
FLAME
SENSOR
GAS
VALVE
OPTIONAL
120 VAC
GAS
VALVE
THERMOCOUPLE
"G0"
SOLID STATE
TEMPERATURE
CONTROLLER
120 VAC
9-PIN
CONNECTOR
MOLEX
MOTOR
2
3
4
1
2
3
4
1
2 AMP FUSE
POWER SWITCH
115V POWER SUPPLY
POT
2-PIN
CONNECTOR
AMP
2
3
4
1
TEMPERATURE
SENSOR
VALVE SWITCH
SAFETY SWITCH IF USED
120
VAC
115V POWER SUPPLY
2 AMP FUSE
POWER SWITCH
24
VAC
RESET
SWITCH
RED
RELAY
LIGHT
In the 24VAC electric-ignition models, 120VAC from the control circuit passes through the
sail switch, the high-limit thermostat, and the 120/24VAC transformer to the spark module.
The module opens the gas control valve and causes the igniter to spark for a predetermined
time. The spark will stop at the end of the predetermined time regardless of burner ignition.
The Thermatron
®
controller or the operating-thermostat controls the system as long as the
flame sensor detects the flame.
In the 120VAC models, a similar power flow occurs. The main difference, other than the
standing pilot, is that the control circuit voltage energizes the 120VAC gas-valve main-coil
directly after passing through the blower, the sail-switch, and the high-limit thermostat.
The Dean Flatbottom fryers may be controlled in a variety of ways. Because models 2424G
and 1824G look almost the same in any configuration, it is essential to determine the type of
ignition and temperature control system for proper troubleshooting and repair.