Annual Maintenance; Annual Summer Shutdown - Aprilaire 350 Owner's Manual

TABLE OF CONTENTS

ANNUAL MAINTENANCE

For best performance, we recommend that you replace the Water
Panel evaporator in your Aprilaire Humidifier at least annually with
the exception of Model 400 which should be changed twice per
heating season.
If you have a Humidifier Control equipped with a "Change Water Panel"
indicator light, it will be lit (during operation only) when it is time to change
your Water Panel. See individual model instructions for additional
maintenance.
To purchase a new Water Panel:
• Call the installer of your Aprilaire Humidifier.
This information is often found on your equipment.
• Call your heating and air conditioning dealer.
• Use our "Dealer Locator" at: www.aprilaire.com
• Look in the Yellow Pages under Humidifying Apparatus or
Heating & Air Conditioner Contractors.
• If none of the above is successful and you still need information,
please feel free to write us.
• Purchase only Genuine Aprilaire Water Panels to maintain performance.
If your humidifier is equipped with an Automatic Humidifier Control with
Water Panel change indicator, after replacing the Water Panel, turn the
control knob to the "Test/Reset" position until the "Change Water Panel"
light blinks to reset its timer. (Blower must be operating and furnace calling
for heat.) Be sure to turn the control knob back to it's original setting.
TABLE OF CONTENTS

ANNUAL SUMMER SHUTDOWN

1. For Models 400, 500, and 600 close the bypass damper, which is a part of
the humidifier, with the use of the small damper handle.
2. Shut off the water supply to the humidifier by fully closing the saddle valve.
Humidifier Control:
No adjustment to the Humidifier Control is required for summer shutdown.
(Applies to both Automatic and Manual Mode.)
TABLE OF CONTENTS
DEALER INSTRUCTIONS FOR PREVENTATIVE MAINTENANCE
NOTE: Annual inspection and preventative maintenance of your total
heating system is important for efficient and safe operation. Call your
Aprilaire dealer for humidifier service and maintenance inspection.
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