Temperature Sensor And Control; Board - AccuTemp Evolution Service Manual

• The Control/Keypad Board will send
a 24VAC signal to the Solid State
Relay(s); closing the Relay(s) (as long
as the Door Switch and the Chamber
Pressure Switch are closed).
• The Solid State Relay(s) then pass
Line Voltage to the Cast Heater's
Elements generating heat evenly over
the bottom of the steam chamber;
creating steam for cooking.
1.3 TEMPERATURE SENSOR (RTD) AND
CONTROL/KEYPAD BOARD
• As the water temperature rises, the
RTD will provide a signal, based on
the resistance of the sensor, to the
Control/Keypad Board to provide a
digital temperature display.
• Control Panel will show PRE (Preheat)
on initial start-up until the steam
chamber reaches 195°F, then COO
(Cook) will be displayed between 195°F
and 212°F.
• The operating default mode on initial
PWR ON is COOK mode; which
automatically causes the steamer to
go to the normal operating boiling
point, which is 212°F at sea level.
• In COOK mode, the 24VAC output
from the Control/Keypad Board is
continuously on, so that the unit's
temperature is controlled by the
Chamber Pressure Switch, which
opens at 1/2 inch of water column or
higher.
SP8026-1909
• In HOLD mode (HLD), the steamer's
regulated temperature will change
to the HOLD
value. The Control/Keypad Board
will regulate temperature via the
RTD input, based on the current
HOLD mode preset value. (This
value can be changed
program function on the Control/
Keyboard Control.)
EVOLUTION ELECTRIC STEAMER
temperature's preset
using the
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