Frymaster LOV - Auto Top off

LOV
™
Technical Reference
2
Auto Top Off
The core of the system is an 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 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 small 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 setpoint, indicating the oil has moved
away from the sensor. The oil is pumped into a
solenoid tree and the ATO opens the solenoid for
the frypot that needs oil.
Oil is pumped into the tank until the ATO detects
a temperature within 55°F (30°C) of setpoint.
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 resting at the lower position.
The system is not active until the oil in the frypot
reaches 300°F (149°C). That temperature is
monitored by the probe. The activation of the
system is handled by the fryer’s computer. In
the McDonald’s system that is the M2007. The
automatic top off system is also inactive during
fi lter cycles.
The system works the same in McDonald’s gas
and electric LOV
™
systems and in the Protector
fryer, which is made for the general market.
The level of the reservoir, or JIB, is monitored
by the ATO and the M2007 computer. If a low
oil condition is not rectifi ed in 6 minutes, the low
JIB light is illuminated on the front of the fryer.
The LOV
™
Systems
LOW Oil
RTD
Oil top off
port
Auto Filtra-
tion RTD
High limit
The solenoid tree and the pump, which
move oil from the reservoir to the frypots,
are visible above.
The ATO board controls the top off of
the fry pots.