APPLICATIONS
- Applicable to most forced air installations
- Installs on the supply air plenum with a by-pass duct from the return plenum in upflow and horizontal applications
- Installs on the return air plenum with a by-pass duct from the supply plenum in downflow applications
- See Typical Applications
- Provides additional humidity to the home during the heating season to increase comfort level
- Do not install where freezing may occur
- Humidifier, saddle valve, and manual or automatic humidifier control (depending on model) shipped in one package
SEQUENCE OF OPERATION
- Humidifier will only operate when indoor blower is operating
- When the level of moisture in the return air or living space area drops below the set point of the humidifier control, the water solenoid valve opens
- Water flows into distribution tray and weeps down through the evaporator pad
- By-pass air flows over the evaporator pad, increasing the humidity of the air, and then back into the return air stream
- When the humidifier control is satisfied the water solenoid valve closes
CABINET
- Rugged, corrosion-resistant molded plastic
- Shipped for left-hand by-pass duct connection
- For right-hand by-pass duct connection, rotate humidifier cabinet 180º top for bottom and relocate drain spud
- See Installation Instructions for additional details
- Built-in damper included to close off bypass duct during summer cooling operation
CONTROLS
Manual Humidistat – HCWB3-12 and HCWB3-17
- Can be horizontally mounted on wall or duct
- Provides manual control of room relative humidity
- Wired in series with the humidifier water solenoid valve
- Adjustable setting
Automatic Humidifier Control – HCWB3-12A and HCWB3-17A
- Duct mount only
- Automatic or manual mode control
- Manual Mode label (with resistor to bypass outdoor temperature sensor) are furnished to indicate when humidistat is installed in Manual Mode
- Senses duct air relative humidity and outdoor temperature
- Includes outdoor temperature sensor for use with automatic control option and resistor for manual control setting
- Adjusts humidity setpoint to provide optimum humidity levels within the space
- Adjustable setting
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