Aprilaire 62 Safety And Installation Instructions Manual page 5

CAUTION
Controller damage or malfunction may occur if installation
instructions are not followed.
Install humidifier control on return plenum only.
Install humidifier control upstream of the bypass outlet or
steam dispersion tube.
Do not install humidifier control facing downward.
DUCT (SHEET METAL) MOUNT:
After location for control is selected, drill a 3/4 inch hole for the
RH sensor (the RH sensor extends from the back of the humidifier
control).
Use 2 sheet metal screws, 3/4 inch long (not provided), to mount
the humidifier control. Use the mounting slot to level the control,
then secure the control with the second sheet metal screw.
Make sure the humidifier control sensor gasket is seated tightly
around the drilled hole. Do not install control without the gasket.
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DUCT (FIBER BOARD) MOUNT:
After location for control is selected, cut a rectangular hole in the
duct board, no smaller than 6-9/16 inches long by 4-3/8 inches
wide.
Cut a rectangular piece of sheet metal to fit behind the hole in
duct board for mounting the humidifier control.
Drill a 3/4 inch hole for the RH sensor (the RH sensor extends from
the back of the humidifier control) into the sheet metal plate.
Use 2 sheet metal screws, 3/4 inch long (not provided), to mount
the humidifier control.
Make sure the humidifier control sensor gasket is seated tightly
around the drilled hole. Do not install control without the
gasket.
Secure the sheet metal plate, with the humidifier control mounted,
inside the duct (see Figure E).
CONTROL REPLACEMENT:
When replacing an existing control, the duct opening left by the
removed control must be covered completely. Locate and install
the new control as instructed previously in this step.
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