Aprilaire 220 - Manual (Page 15)

APRILAIRE HUMIDIFIER MODELS 350-360
WARNING! 120 volts may cause serious injury from electrical shock. Disconnect
power and shut off water supply before servicing.
MAINTENANCE INSTRUCTIONS
for
1. Inlet Grille
2. Distribution Tray
3. Scale Control Insert
4. Distribution Tray Cover
5. Water Panel
6. Dran Spud
7. Power Cord
8. Metal Housing
9. Evaporative Assembly
1. Disconnect electrica! power and turn off water supply.
2. Remove screws of the inlet grille (1). The grille can now be removed
from the metal housing (8).
3. Lift the complete plastic framed evaporative section out of the humidifier
housing.
4. To remove the distribution tray (2) from evaporative assembly (9), push
down on tray and pull out on white plastic frame {Scale Control insert)
(3). To clean the “V” openings of the tray, it will be necessary to gently
pry the distribution tray cover (4) from the tray. In this cleaning procedure
do not scrape off the granular coating from the bottom of the h'ay.
This helps insure proper, even waterflow for maximum performance. See
page 2 if removed.
5. Remove Water Panel evaporator (5) from the Scale Control Insert (3).
Scrape the Insert with a putty knife or similar tool and flush clean with
water. Install new Water Panel evaporator (Stock No. 35) with black
colored spot up. Snap plastic cover into tray and tray into Scale
Control Insert.
6. Remove the drain hose from the bottom of the unit and bend and flex it
to loosen the internal calcium deposits. Then flush it with water under
pressure and slip it back onto the black drain fitting (6).
7. Re-install complete plastic framed evaporative section and intake grille.
8. Reconnect electrical power.
9. Turn on water supply and check unit operation.
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