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Duct (fiber board) Installation:
1. Select Humidifier Control location on furnace return air duct.
2. Cut a rectangular hole in the duct board, no smaller than
5-3/4 inches long by 3-3/4 inches wide.
3. Cut a rectangular piece of sheet metal to fit behind the hole
in duct board for mounting the Humidifier Control.
4. Use the attached template to mark the sheet metal opening
for the Humidifier Control.
5. Carefully cut the opening in the sheet metal.
6. (See Figure 3) Gently pull knob (A) from Humidifier Control
cover (B). Cover is held in place by snap clips. Remove cover
by pulling carefully. Do not touch the sensing element.
7. Run low voltage leads to control location. All wiring should
conform to the National Electrical Code and local regulations.
8. Attach low voltage wires.
9. Make sure that the gasket (G) is in place. Use four sheet
metal screws (H) (not provided) to mount the Humidifier
Control in the sheet metal opening.
10. Reassemble Humidifier Control cover, guiding the low voltage
wires through the cover side opening. Press on knob.
11. Secure the sheet metal plate inside the duct.