1. Run the two-strand thermostat wire from the humidifier to the humidistat, and from the humidistat to the pressure switch and back to complete the
wiring loop to the humidifier. This is illustrated in Fig. 12.
2. Cut lengths of thermostat wire to reach between components, leaving adequate wire at both ends for connections.
NOTE: Humidistat and pressure switch can be wired in any order.
3. At the humidifier, connect the black and white conductors to the two yellow humidifier wires. (The red wires from the humidifier are not used.)
4. At the humidistat, connect both black conductors to the two humidistat terminals. Use a wire nut to connect together the two white conductors.
TESTING HUMIDIFIER OPERATION
Checklist
A humidifier is a level.
Control wiring was reviewed using circuit diagram.
A humidifier is plugged in.
Feedline has no kinks.
The drain line slopes continuously down and ends at the floor drain.
The water hose inside the humidifier is connected to the PerfectFlow™ water distribution tray.
After installation use the following steps to check the humidifier operation:
1. Turn on the power and the water supply
2. Turn the H8908 Humidistat to On and turn on the heat by setting the thermostat to 10ºF (6ºC) above room temperature.
IMPORTANT
The furnace blower must be on to activate the humidifier.
3. Make sure that water is flowing out of the drain hose. If water does not flow, see Troubleshooting Your Humidifier section.
4. Check for leaks.
5. Reset the thermostat and H8908 Humidistat to a comfortable setting for automatic operation.
OPERATION
How Your Humidifier Works
Your Honeywell humidifier uses the principle that vapor (evaporated water) is created when warm air blows over a water-soaked area. As the vapor
circulates, the relative humidity rises.
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