Norcold 121X series, Service Manual

Page: 81 / 100

S
ection
10
79
Figure 10-4. —Water fill line and water
fill tube connection.
Cup
Water fill line
Foil style heater
Water fill tube
1/2 in. clamp
Figure 10-4 illustrates the water fill line. The fill
line connection at the water valve is a 1/4 inch
plastic compression fitting. The connection at
the water fill tube is made with a 1/2 inch hose
clamp.
The fill line is covered with a foil style 12 volt
DC heater. See “Water Line DC Heater” in
this section.
The refrigerator has to be removed from the
enclosure to service or replace the water fill
line.
Water Fill Tube
The water fill tube illustrated in Figure 10-4, is
installed and sealed at the factory. It is not a
replaceable component.
Water Line Heater
In ambient temperatures of 42 to 38 degrees
Fahrenheit (5.5 to 3.3 degrees Celsius) and
lower, the water line heater keeps the fill line
and water valve body from freezing when the
refrigerator is on. This heater is controlled by a
thermostatic switch, illustrated in Figure 10-5.
+12 VDC
in
Figure 10-5. —Thermostatic switch and
connections.
Thermostatic switch
Rear of cabinet
+12 VDC
out
Water Fill Line
The thermostat energizes the circuit when
ambient temperature is approximately 42 to
38 degrees Fahrenheit (5.5 to 3.3 degrees
Celsius) and de-energizes at approximately 48
degrees Fahrenheit (8.8 degrees Celsius).
The water line heater does not protect
the ice maker water valve and fill line
at ambient temperatures of 0 degrees
Fahrenheit (-17 degrees Celsius). At these
ambient temperatures the water valve and
the water fill line need to winterized.
WARNING

NOTE