HUMIDIFIER BODY INSTALLATION
This humidifier is designed to be mounted on the return duct
(cold air) for safety reasons. This will minimize the exposure to
high temperatures and extend product/component life. Always
take precaution to ensure that water supply tube, water drain
tube, any electrical wiring does not become kinked or come into
contact with sharp edges or hot surfaces. Keep in mind that the
humidistat must be mounted at least 6” upstream from the
humidifier cabinet, where moist air enters the duct.
CAUTION: When cutting or drilling into ducting take care not to
damage any air-conditioning coils or other furnace apparatus.
CAUTION: Wear safety glasses and work gloves when installing
this unit, sharp metal edges can cause severe injury.
CAUTION: Turn the furnace off before starting this installation.
This humidifier cabinet consists of two side panels (bypass side
panel and motor side panel), a front cover, and a water pan. The
surface of the duct will form the rear of the humidifier cabinet.
STEP #1: RIGHT HAND DUCTING OR LEFT HAND DUCTING
Once you have decided the best location for the humidifier
determine if the unit must be left or right hand ducting. This will
depend on whether the hot air duct is to the left or right of the
cold air duct. (Fig. 3) The side panels are symmetrical so setting
up for left or right hand ducting is done by flipping the panel 180
degrees. (Fig. 4)
STEP #2: MOUNTING THE HUMIDIFIER CABINET ON THE DUCT
If you have not already done so, remove the humidifier side
panels from the carton. Locate the “Humidifier Cabinet
Mounting Template”.
CAUTION: When cutting or drilling into ducting take care not to
damage any air-conditioning coils or other furnace apparatus.
CAUTION: Wear safety glasses and work gloves when installing
this unit. Sharp metal edges can cause severe injury.
CAUTION: Turn off the furnace before beginning this installation.
DRILLING THE HOLES AND MAKING THE CUTOUT
1. Use adhesive tape to affix the
template onto the duct in the
selected location. Use the level
line on the template to ensure the
humidifier cabinet will be
mounted level.
2. Drill the 4 marked
1
/8” side panel
mounting holes. (Fig. 5)
3. Using a
3
/8” drill bit (not supplied)
drill a hole inside the rectangle
area marked “Humidifier Cut
Out”. (Fig. 6)
4. Using the
3
/8” hole as a starting
point cut out the Humidifier Cut
Out area marked on the template
using tin snips (not supplied). Cut
on the outside of the lines to
ensure the cabinet will fit.
5. Remove remaining portion of the
template from the duct.
MOUNTING THE BYPASS
SIDE PANEL
6. Mount the bypass side panel to
the duct first. This is the side of
the humidifier closest to the hot
air duct.
7. Use 2 of the supplied screws to
secure the bypass side panel onto
the duct work. The screws will
install through two holes on the
bypass side panel flange into two of
the holes drill in #2. (Fig. 7)
MOUNTING THE MOTOR
SIDE PANEL
8. Repeat the last two steps for the
motor side panel. (Fig. 8)
9. After the side panels are mounted
onto the duct install the two strips
of gasket on the duct in between
the two sides top and bottom, as
shown in figure 9.
4
Furnace Humidifier
RIGHTHAND DUCTING
SUPPLY DUCT
HOT AIR
RETURN DUCT
COLD AIR
Flipped 180˚
Figure 3
SUPPLY DUCT
HOT AIR
RETURN DUCT
COLD AIR
LEFTHAND DUCTING
Figure 4
Flipped 180˚
Figure 5
DRILL HOLES
HUMIDIFIER
CUT-OUT
Figure 6
DRILL CUT-OUT
HUMIDIFIER
CUT-OUT
Figure 7
Figure 8
Figure 9
BOTTOM
GASKET
(14 pages)
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