ADDITIONAL INFORMATION
Be sure to keep fireplace dampers closed when not in use. They provide an
excellent escape route for heat and humidity.
On occasion, indoor moisture producing activities such as clothes drying,
cooking, showers, etc., may raise the humidity level higher than it should be,
even though the Aprilaire humidifier is not operating. Telltale indications are
condensation or frost on cold surfaces such as windows, doors, walls, etc. If
such condensation persists for several hours, your home should be ventilated to
dissipate the potentially damaging excess moisture.
MAINTENANCE
WARNING
ELECTRIC SHOCK HAZARD. Disconnect main electrical power to the
humidifier at the circuit breaker and drain the water from unit before
servicing. Hot surface inside.
NOTICE
• Service should be performed by an HVAC technician.
• Use only genuine Aprilaire replacement parts.
INSPECT HUMIDIFIER WHEN SERVICING
• Replace canister and O-ring annually
• Clean drain valve and fill valve screen annually
• Replace electrode wires every 3 years or as needed (see step 3 of CANISTER
REPLACEMENT AND DRAIN VALVE SERVICE)
SERVICE SHUTDOWN PROCEDURE
1. Press On/Off button to turn humidifier off (see FIGURE 6).
2. Allow humidifier to drain.
3. When the green Drain light (see FIGURE 6) stops flashing, disconnect main
electrical power to humidifier at the circuit breaker.
4. Allow the unit to cool.
5. Shut off water supply to unit.
FIGURE 6 – STEAM HUMIDIFIER
1
On/Off button and light
2
Drain light
3
Front panel
4
Side panel
5
Service light
3
4
1
2
5
English 2120 English
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