Maintenance Instructions; Models 768 & 760 - Aprilaire 1606X Series Owner's Manual

MAINTENANCE INSTRUCTIONS
for
APRILAIRE HUMIDIFIER MODELS 768-760
WARNING! 120 volts may cause serious injuryfrom electrical shock. Disconnect
power and shut off water supplybefore sel_icing,
1. Front Cover
2. Base
3. Evaporative
Assembly
4, Distribution Tray
5. "V" Notches
6. Water Panel
7. Scale Control Insert
8. Drain Hose
9. Power Cord
1. Note humidistat or control setting and turn dial to the "OFF" position.
2. Disconnectelectricalpowerand turn off water supply,
3. Unlatch humidifier cover assembly (1) from base assembly (2) at the bottom of the
cover, lift, and set aside.
4. Pullout the evaporativeassembly(3)by graspingat the top and tipping out.
5. Removethe black distributiontray (4) from the evaporativeassembly (3) by unsnap-
pingthe white plastic holdingstrips from the tabs at the and of the tray. Lightlyscrape
out any calcium deposits and clean the "V" notches (5) but do not scrape off the
granularcoating from the bottom. This textured surface helps ensure even water
flow for maximum performance,
6. Slide the Water Panel evaporator(6)out from the white plastic scale control insert (7).
Cleanthe insert frame by twisting and flexing it to loosenthe calcium depositsor use
a putty knife.ReplaceWater Panelevaporatorannuallywith a new WaterPanelevapo-
rator(StockNo. 35), SlidetheWater Panelevaporatorback into the scale control insert
with the red coloreclspot up and snapthe black distributiontray (4)back into place.
7. Reinstall the evaporativeassembly(3)into the baseassembly(2),Pushthe evaporative
assembly (3)in at the top betweenthe retainingribs that hold the assemblyin place in
a verticalposition.
8. Removethe drain hose (8)from the bottom of the unit. Bend and flex it to loosenthe
intemalcalcium deposits.Thenflush it with water under pressureand slip it back onto
the drain fitting.
9. Reinstall cover assembly (1) by hooking at the top of the base assembly (2) and
latching at the bottom.
10. Reconnectelectricalpower (9)andtum on the water supply.
11. Check system operation:
Manual Humidistat: Tum up humidistat to highest setting and make sure the
furnace blower is operating. Humidifier will operate if RH is less than 50%.
Automatic Humidifier Control: Check system operation by setting the knob
to "Test." With furnace blower operating and furnace calling for heat,
humidifier will operate for one minute.
12, Set humidistat or control to its original position,
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