B.
Record meter reading from thermocouple
when the cooking control cycles off and on
for at least two complete heating cycles.
6.
Calculate the average temperature by adding the
temperature reading when the heat lamp goes off
to the temperature reading when the heat lamp
comes on, then dividing the sum by 2.
[Temp (lamp off) + Temp. (lamp on)] ÷ 2 =
Average Temp.
Example: (360 + 340) ÷ 2 = 700 ÷ 2 = 350°F
The average temperature should be 350°F
(±5°F).
A.
If the average temperature reading is within
tolerance, cooking control is properly
calibrated.
B.
If the average temperature reading is out of
tolerance, perform the following:
1)
Solid State Control – Adjust the offset
temperature accordingly, as outlined in
SOLID STATE CONTROL.
2)
Computer Control – Adjust the offset
temperature accordingly, as outlined in
COMPUTER CONTROL - OLDER
CONTROLS.
7.
Repeat the average temperature calculation for
up to three attempts. Allow the cooking control to
cycle at least two times between adjustments,
before performing the calculation
8.
If calibration is unsuccessful, the cooking control
may be malfunctioning and cannot be adjusted
properly. Install a replacement cooking control
and check calibration.
ELECTRONIC IGNITION SYSTEM
Operation
When the main power switch is turned on, the ignition
control module is energized with 24 volts between
terminals 5 and 6.
An output of 24 volts is sent from terminals 2 and 3 to
the pilot coil on the combination valve, allowing gas
flow to the pilot; and spark voltage is sent from
terminal 9 to begin sparking at the ignitor/flame sense
electrode. The sparking will continue until an
adequate pilot flame is sensed, or for a maximum of
90 seconds.
If pilot ignition is not established within the first several
seconds of ignition trial time, the cooking control
displays a message indicating pilot out or ignition
failure as the ignition module continues to generate a
spark at the ignitor/flame sense electrode.
If pilot is not established within the 90 second ignition
trial time, the ignition module locks out power to the
gas valve. A message is displayed by the control
indicating ignition lockout; keypad is disabled, and the
electronic alarm will sound continuously.
The system remains locked out until the power switch
is cycled to reset the system and re-start the ignition
trial cycle.
Fig. 44
Once the pilot flame is confirmed, a 24 volt output from
terminal 1 will provide the ignition status input signal
to the cooking control. When the cooking control calls
for heat, the heat output is activated, and power is
applied to the heat control Triac on the Control
Interface Board. With the Triac powered, the main
valve coil on the combination valve is then energized,
allowing gas flow to the burners.
Terminal
Description
1
MV (main voltage) - 24VAC output will
be present, provided the ignitor/flame
sense electrode is sensing an adequate
pilot flame.
2
MV/PV (common).
3
PV (pilot voltage) - 24VAC output will be
present after the ignition module is
powered. The voltage will remain
present, provided an adequate pilot
flame is sensed. If the pilot flame is not
sensed within the ignition trial time, the
ignition module locks out, which
removes the output voltage.
4
Burner ground.
5
24VAC ground.
6
24VAC hot (input).
9
Spark voltage output to ignitor/flame
sense electrode; and for pilot flame
current rectification.
FLAME SENSE CURRENT CHECK
1.
Turn off the power switch.
GR Series Gas Fryers with NCC Controls (formerly Tridelta / Built after 3/05) - SERVICE PROCEDURES AND
ADJUSTMENTS
F35660
Rev. A (0717)
Page 24 of
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