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HE240, HE280 HUMIDIFIER
7. Make sure the humidifier housing is level, then position it in the opening so the plastic tabs are in place on
the lower sheet metal edge of the opening. Use pliers, as necessary, to flatten cut edges. See Fig. 5.
8. Secure the humidifier housing to the opening at the top and bottom using sheet metal screws.
9. Use the 6 in. (155 mm) starter collar as a template to mark the opening for the bypass. The starter collar
end can be identified by the pliable metal tabs.
10. Carefully cut the opening for the 6 in. (155 mm) starter collar end of the flex duct. See Fig. 6. Use a drill to
start the cut in the middle of the circle. Cut in an outward spiral to assist in controlling the cut.
11. Reassemble humidifier side plates to customize the orientation for your specific install. The side plate with
the humidifier port needs to be on the side of the humidifier that is closest to the 6 in. (155mm) hole cut in
Step 10.
12. Insert flex duct with starter collar into the 6" (155mm) hole that was cut in Step 10. Reach into hole
THROUGH THE FLEX DUCT so that the pliable metal tabs can be bent outwards into the hole. These tabs,
when bent outwards, will help secure the flex duct into your home's duct work.
13. Slide remaining loose end of flex duct over the humidifier port on the HE240/HE280, making sure that the
flex duct advances past the raised plastic tabs on the port. These tabs will help to hold the flex duct in
place. Verify that the damper blade has adequate clearance to move back and forth between the summer
and winter positions. Secure the flex duct in place with a connector strap.
69-2685ES—07
SHEET METAL
SCREWS (4)
OPENING
TO AIR DUCT
PLASTIC
TABS (2)
DRAIN TUBING
Fig. 5. Installing humidifier on duct.
6 IN. ROUND TEMPLATE
STARTING
HOLE
Fig. 6. Cutting bypass opening.
DUCT
LEVEL
M33324A
M20172
6
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