WATER LEVEL CONTROL (WLC LLCO)
The water level control provides low level cut-off protection to shut off the heat source in case the fluid level in the
kettle reservoir jacket drops below the WLC LLCO probe. A single low level cut-off probe (LLCO) is connected to
the control.
The water level control has input voltage of 120VAC across terminals L1 and L2 which powers the primary side of
the transformer on the board. One side of the transformer secondary is powered through a series path to chassis
ground. The other side of the transformer secondary (12VAC) is connected to the LLCO probe that supplies power
to the LLCO relay coil on the board. When the kettle is in the full upright position and the reservoir jacket fluid is at
the proper level, the fluid is in constant contact with the LLCO probe and the circuit is completed.
When the power switch is turned ON, power is supplied to the water level control. With the kettle in the full upright
position and the fluid level in the reservoir jacket in contact with the LLCO probe, the LLCO relay coil is energized.
The LLCO relay contacts WLC LLCO-NC open, WLC LLCO-NO close and the LLCO LED turns on. When the kettle
is tilted to empty the contents, the fluid is no longer in contact with the LLCO probe and the circuit is open. The
LLCO relay coil is de-energized and LLCO LED turns off.
Fig. 36
Fig. 37
SEQUENCE OF OPERATION
1.
Conditions.
A.
Kettle connected to correct voltage supply
and is properly grounded.
1)
120VAC potential across X2 and X1 on
secondary of main transformer.
B.
Power switch and light (1LT) (amber) are
off.
C.
Low water light (2LT) (red) is off.
D.
Pressure switch (1PAS) contacts closed.
E.
Temperature dial at lowest setting
(potentiometer fully CCW). 1) Internal relay
contacts N.O. are open.
F.
Kettle at room temperature and in the full
upright position.
2.
Power switch turned ON.
A.
Power light (1LT) (amber) comes on.
Electric Countertop Tilting Kettles, K6ETT, K12ETT, K20ETT - ELECTRICAL OPERATION
Page 23 of 28
F35496 Rev. A (1117)
