Quantity Accessory (Item Quantity)
Air Pressure Switch and Accessories
2
Black rubber gasket
2
Tubing Fitting Elbow
1 10 ft. Tubing, 1/4 in. ID
1 Air Pressure Switch (Fig. 10)
2 Screws, #8 x 3/4 in. sheet metal
2 Terminal Adaptor
Required Tools
Tools required for installation include:
Tin snip.
Screwdriver.
Adjustable or open-end wrench.
Drill, punch or awl.
Level.
3/4-in. Sheet Metal Drill Bit
Determining Best Location for Humidifier
CAUTION
Temperature and Static Pressure Hazard. Can cause property or equipment damage. Locate humidifier where
ambient temperature is between 32°F (0°C) and 160°F (71°C). Do not install humidifier where freezing temperatures
could occur. Be sure supply plenum static pressure is no greater than 0.4 in. wk. and water pressure is no greater
than 124 psi.
Select a location for the humidifier on the supply (warm air stream) plenum. See Fig. 1.
Select a location that cannot damage the air conditioner A-coil during installation.
Do not locate the humidifier on the furnace body.
Allow adequate clearance in front of and above the humidifier so you can easily remove the cover to perform
routine maintenance.
Mount the humidifier at least 3 in. (78 mm) above the furnace body to allow adequate space for the
solenoid valve and drain line.
Mount the humidifier in a conditioned space to prevent freezing.
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