Honeywell HE420A Position bracket to duct edge, Follow the dotted line carefully

HE420A STEAM POWER HUMIDIFIER

M10580B

Fig. 3. Mount humidifier horizontally under duct

extension using mounting bracket.

CAUTION

Steam Condensation, Fire and Freezing Water Hazard.

Can cause failure of fan or limit control or result in water damage to home.

•Do not install the humidifier where the sidewalls of the return air duct are constructed of wood (i.e. floor joist).

•Do not Install the humidifier where the temperature is lower than 32°F (O°C) or higher than 200°F (93°C).

•For all installation configurations, the mounting area must be strong enough to support the humidifier's weight when it is full of water (approximately 18 lbs.), and to hold the humidifier in a level position for safe, reliable operation. Otherwise, additional duct reinforcement will be necessary.

•If the installation includes exposed insulated materials, a section of the ductwork must be removed and replaced with rigid metal duct extending at least 6 feet downstream from the humidifier.

•Mount the unit at least 4-to-6 feet after the plenum transition. Avoid sudden turns or transitions in the ductwork in the immediate area downstream from the humidifier.

There are three possible mounting procedures:

•horizontally under at least a 10 in. (254 mm) wide duct using the mounting bracket (preferred mounting);

•horizontally under a reinforced duct;

•horizontally under a duct extension using the mounting bracket.

Decide which mounting is appropriate and follow those mounting instructions.

Mount Horizontally Using Mounting Bracket (Preferred Mounting Method)

IMPORTANT

The duct must be at least 10 in. (254 mm) wide to use this mounting method.

The duct is strongest when using the bracket mounting method because the least amount of duct reinforcement is required because of the bracket location. See Fig. 1.

However, in some installations, reinforcement may still be necessary to help support the weight of the humidifier and keep the humidifier level.

1.Position the bracket 1/2 in. (13 mm) from the edge of the duct and trace around the bracket. See Fig. 4.

2.Once the outline has been traced, remove bracket.

1/2 IN. (13 MM)

FROM EDGE

BRACKET

M23374

Fig. 4. Position bracket to duct edge.

3.Drill a 3/8 in. (10 mm) hole within the center portion of the bracket.

4.Use tin snips to cut around the outline of the bracket.

IMPORTANT

Follow the dotted line carefully.

5.Remove the sheet metal.

6.Use two 8-32 screws and nuts to attach the mount- ing bracket (L shaped with six holes) to the top/front surface of the humidifier. The humidifier is now ready for mounting.

NOTE: Position the humidifier so the upward protrusion of the U is on the side toward the reservoir.

IMPORTANT

Do not mount the humidifier until the water level is adjusted. See the Plumbing section.

7.Slide the flanges of the humidifier reservoir into the mounting bracket until the reservoir’s front flange comes into contact with the edge of the duct.

8.Secure the humidifier to the duct with three no. 8 sheet metal screws.

69-1108—2 2