Frymaster LOV M3000 - Manual (Page 3)

LOV ™ Generation II Technical Reference
2
Auto Top Off
The core of the system is the automatic top-off
board, which senses when the oil level is low and
fi lls the pot to the top line.
The oil level is monitored by an RTD (Resistance
Temperature Detector) sensor in the frypot at the
upper oil level. The oil is moved to the pot from a
reservoir, called a JIB (Jug In Box), to the frypot
with a pump.
A circuit board, the ATO (Automatic Top Off), is
located inside a box behind the JIB. It monitors the
oil-level RTD and activates the pump when it senses
an oil temperature drop of 60°F (33°C) below set-
point, indicating the oil has moved away from the
sensor. The ATO sends a signal to the MIB (Manual
Interface Board), which then sends a signal to the
AIF to open the actuator on the return valve of the
frypot to be topped off.
Once the actuator has opened the return valve, oil is
pumped into the vat for a specifi ed amount of time
(approximately 60 seconds). When the ATO RTD
detects a temperature within 55°F (30°C) of set-
point, it is satisfi ed and the actuator closes the valve.
Top off will continue on the next vat if needed.
The system is not suited to fi lling the frypot when it
is empty and there are safeguards to prevent it from
activating when the fryer is cold and the oil is rest-
ing at the lower position.
The system is not active until the oil in the frypot
reaches setpoint. That temperature is monitored by
the temperature probe. The activation of the system
is handled by the fryer’s computer, the M3000. The
automatic top off system is also inactive during
fi lter dispose cycles.
The system works the same in McDonald’s gas and
electric LOV
™ systems.
The level of the reservoir, or JIB, is monitored by
the ATO and the M3000 computer. If a low oil
condition is not rectifi ed with two top off attempts
or within 6 minutes, the low JIB light is illuminated
on the front of the fryer. It will stay illuminated until
the JIB is replaced and the orange button has been
pressed and held to reset the light (see page 34).
The LOV ™ Systems
The pump that moves oil from the reser-
voir to the frypots is visible above.
The ATO board positioned underneath the LON
gateway controls the top off of the fry pots.
Ports and sensors inside an electric frypot.
ATO Sensor
AIF Sensor
High limit
Oil Return/Top
Off Slots
Oil Defl ector
Ports and sensors inside a gas frypot. Oil return/
top off is at bottom rear of cool zone.
ATO Sensor
AIF Sensor
High limit
Oil Return
Sensor
Temperature
RTD