Instructions / Assembly

After replacing the Model 80 Steam Humidifier Canister:
• Ensure fan is operating during a call for humidification.
• Check drain, steam and condensate hoses for kinks, blockages, leaks or cracks. Replace if necessary.
• Ensure steam outlet of the fan pack is not blocked.
MAINTENANCE
TROUBLESHOOTING GUIDE
TABLE 1 – Troubleshooting Guide
Problem Possible cause Action
Water dripping from
Fan Pack
Tubing connection Check all connections.
Fan not operating See “Fan does not operate”.
Steam outlets blocked Clean steam dispersion manifold outlet.
Foaming in canister or
steam hose
Rinse components with clean water.
Air drafts in the space Do not install near supply ducts or ceiling fans.
Fan does not operate Wiring Check wiring.
Steam Humidifier power Check that Steam Humidifier is powered and on.
No humidity call Adjust humidistat setting. Check location of humidistat.
Circuit board output Confirm 24 VAC output from Steam Humidifier FAN PACK terminals during a call for
humidity. Confirm that the Steam Humidifier contains a 75 VA transformer.
Motor failure Replace fan motor.
Noise Fan noise Check for obstructions or damage to fan.
Gurgling Add a drip tee and trap (PN 4028) to the steam line as close to the Steam Humidifier as
possible to divert condensation to drain. See Figure 5.
If a problem arises with the Aprilaire Fan Pack, please review the following troubleshooting guide for possible causes and solutions. If the
problem persists, call Aprilaire Tech Support toll-free at 1-800-334-6011. Please be prepared to describe the exact nature of the problem.
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