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UNT-SVX10G-E4
WARNING! When performing any
maintenance on the unit, disconnect
power supply to the unit. Wear
protective gloves to avoid injury.
Servicing the electric
heater
Electric heaters are protected by an
automatic reset overheat thermostat
and a thermal fuse protection at
higher setpoint on each heating
element.
Should the thermal fuse protection
melt, the heating element will have
to be replaced.
Figure 56 - Electric heater
To replace a heating element:
1. Disconnect the drain pan piping
and unplug the condensate
pump supply wire, if present.
2. Remove the filter and then
remove the coil access panel, or
panels, depending on the unit
size and configuration. The panel
and the drain pan are removed at
the same time. The electric heater
elements are visible in front of
the fan outlet. The electric heater
element connections are on the
coil side.
3. The fan board may have to be
removed. See "Servicing the fan
motor assembly" section.
4. Do the operations in reverse
order to reassemble.
5. WARNING! Be sure to install
electric heater elements of the
same size as the original ones.
CAUTION ! Before replacing a
heating element, check to see if the
shunt was cut in the heating
element that has been removed. If
so, you must cut the shunt in the
new heating element, as in
Figure 50.
Figure 57 - Cutting the shunt on a
heating element
1
2
Accessing the filter
Figure 58 - Handling the filter - unit
without inlet air connection
To remove the filter:
1. Slightly push the filter upwards.
2. Slightly rotate the filter.
3. Pull the filter out.
To put the filter back, hold the filter
at the top of the frame with one
hand. Push to clip the filter back
into place at the bottom with the
other hand.
1
2
clic!
1
1 = Electric heater
2 = Shunt
Maintenance
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