Start-Up Procedure; Sequence Of Operation - Aprilaire 800 Installation & Maintenance Instructions Manual

STaRT-UP PRoCeDURe

1 . Once the supply water, drain, steam hose, electrical power and control wiring connections are complete, make sure canister is fully seated
into drain valve and three wire connectors on top of canister are secure . (High water probe wire and two interchangeable electrode wires .)
2 . Attach side panel and front door .
3 . Open saddle valve allowing water to flow to humidifier . Check for leaks .
4 . Turn Automatic Digital Control knob to OFF .
5 . Close main power switch energizing humidifier .
6 . Press On/Off button on humidifier . The On/Off light will illuminate green .
7 . Make sure the HVAC blower is operating and adjust the ADHC dial up to initiate a call for humidity .
note: The ADHC can be placed into TEST mode to force a call for humidity but this only lasts for one minute .
The Steam light will illuminate green indicating a call for humidity and the Fill light will illuminate green indicating the fill valve is open
allowing the canister to fill . You should also hear the water flowing . If water flows down drain while humidifier is filling, check for kinks in
hoses and make sure O-ring is properly seated in groove in drain valve .
8 . Once the Fill light turns off, to verify that the humidifier will drain properly, press the On/Off button to turn humidifier off . You may hear the
fill valve open allowing cold water to flow into the canister to cool the water in the canister . The Drain light will flash green for 15 seconds
then turn green for four minutes while the canister drains . Once the Drain light turns off, the drain cycle is complete .
9 . Set ADHC to proper level .
10 . Press On/Off button to turn humidifier on .

SeQUenCe of oPeRaTIon

When the Automatic Digital Humidifier Control (ADHC) detects RH below the set point, and provided the humidifier is turned on and the HVAC
system blower is operating, the internal controller in the humidifier energizes the electrodes and measures the current flowing through the water
between them . The controller adjusts water level in the canister via a fill valve and a drain valve to maintain current at a nominal 11 .5 amps . The
operating water level in the canister depends on the mineral content of the water which determines conductivity .
The ADHC has the ability to turn on the HVAC system blower if the homeowner or installer chooses to utilize that feature . See ADHC installation
manual .
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