Fryer User Manual

ER SERIES FRYER SERVICE MANUAL SUPPLEMENT - ELECTRICAL OPERATION
F24696 (May 2001) Page 10 of 56
2. Press power ON switch.
A. 24VAC initially energizes relay coil R1
through the momentary ON power switch
contacts (N.O.).
B. When switch is released, relay coil R1
remains energized through R1-2 "latching
circuit" contacts (N.O.) and the momentary
OFF power switch contacts (N.C.).
1) R1-1 CLOSED.
2) R1-2 CLOSED.
C. Supply voltage energizes the following
components:
1) Power ON light (red).
2) Power supplied to basket lift controls,
if installed.
3) 1CON and 3CON through tilt switch
and second high limit thermostat.
4) Temperature control board at proper
terminal (2, 3 or 4) for supply voltage
and jumpered to terminal 5.
D. Temperature control board evaluates the
inputs from thermistor and set point
potentiometer then energizes the board
relays.
1) The Control relay contacts (N.O.) at
terminal 5 CLOSE.
2) The first high limit relay contacts
(N.C.) at terminal 6 change state to
the normally OPEN position and
provide a path to the output at
terminal 7.
NOTE
: The first high limit "light" may
quickly flash once, until the High limit relay
is energized.
a. 2CON and 4CON are energized
and heating elements are
powered.
b. Heat light comes ON.
NOTE
: Refer to "SCHEMATIC
TSP1569C" under "SCHEMATIC
DIAGRAMS".
3. Oil reaches set point temperature.
A. Temperature control de-energizes the
"control relay" on board, contacts at
terminal 5 OPEN and the output at
terminal 7 is removed.
1) 2CON and 4CON are de-energized
and power is removed from the
heating elements.
2) Heat light goes OFF.
4. Temperature control cycles output to terminal 7
until power switch is turned OFF, heating
elements are raised or a high limit condition
occurs.
A. If oil reaches 410°F ±5, the temperature
control de-energizes "high limit relay" on
board, contacts revert back to the normally
CLOSED position and the output changes
to terminal 6.
1) The first high limit light comes ON.
2) 2CON and 4CON are de-energized
and power is removed from the
heating elements.
3) Output is removed from terminal 6
when oil temperature drops below set
point temperature and is returned to
terminal 7.
B. If the second high limit OPENS
(435°F ±15) or the tilt switch operates,
1CON and 3CON are de-energized and
power is removed from the heating
elements and heating stops.
1) Trouble "light" and second high limit
"light" come ON.
MELT CYCLE - SOLID SHORTENING
1. Conditions.
A. Same as outlined in steps 1A thru 1G
under "FRY CYCLE - LIQUID FRYING
OIL".
B. Solid shortening at the proper pounds in
vat and at room temperature.
C. Fry/Melt switch in MELT position.
D. Temperature Control set to desired frying
temperature.
2. Same as outlined in steps 2 thru 2. C. 4) under
"FRY CYCLE - LIQUID FRYING OIL".
3. Temperature control board evaluates the inputs
from thermistor then energizes the board
relays.
A. Melt cycle is initiated and the temperature
control functions as a percent ON/OFF
timer.
1) The control relay contacts (N.O.) at
terminal 5, cycle the output at
terminal 7 to energize 2CON and
4CON and power the heating
elements.
a. Initial condition is OFF 45
seconds.
b. Heat condition ON 2 seconds
(heat light ON).