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HE420A Steam Power Humidifier
INSTALLATION INSTRUCTIONS
APPLICATION
The HE420A Steam Power Humidifier uses a thermal fan interlock control to provide humidification for the whole house. The steam power humidifier is designed to work with high efficiency furnaces and heat pumps.
INSTALLATION
IMPORTANT
This product is for residential applications only and must be installed by a qualified HVAC con- tractor. Failure to comply could invalidate the product warranty, or result in serious injury or electrocution.
SELECT LOCATION AND MOUNT
WARNING
Electrocution, Heavy Equipment and Chemical Hazard.
Can cause death, blindness, water damage to home and heater failure.
•Do not cut into any air conditioning or electrical line.
•Wear safety glasses when cutting or drilling.
•Mount the humidifier in a level position to avoid water damage and heater failure.
•Reinforce duct as necessary to ensure stability.
There are three typical ways of mounting the steam humidifier. See Fig. 1, 2, and 3. Be sure to select a location where the humidifier can be plugged in without an extension cord. The preferred installation location is on the warm air side of the furnace. If that location is not possible, the humidifier should be mounted a minimum of 6 ft (1.8m) upstream from the furnace filter. Depending on the location selected, additional duct reinforcement may be necessary because the humidifier weighs 18 lb when filled with water.
M10536B
Fig. 1. Mount humidifier horizontally under duct
using mounting bracket.
M10578B
