-TOP-
READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING
TEMPLATE -MUST BE lEVEL
Ae!~~. AUTOMAllCHUMIDIRERMODEL400
Unpack die contents ofdie Model 400box. Look atdie drawing and parts list and make sure all the parts are present
1. Removefront cover by pressing
centertabson top andbottomofthe
cover(1)andbase(2).Pullfeedtube
(3) out of water distribution tray
(4).Lift the Water PanelEvaporator
essembly out of the base. (See
Figure 1)
2. The unit comes assembled for
left sidedischarge. If converting to
right sidedischarge. the base can
be rotated so round collar is facing
to the right Removehole plug (10)
by twisting and pushing out.
Removetwo screws holdingwater
level sensor assembly (9) and lift.
On back of sensor assembly (9),
movewiresfrom rightsideretaining
clip to left side retaining clip.
Reinstansensor assemblyandhole
plug on opposite sides of base(2).
Press wires back into slot inside
bese(2).
3. Using alevel, position this tem-
plate at least 3' abovethe furnace
c
(1i).
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10.HolePlug
11.Nameplate
12.SolenoidValve
13.Roat
14.RoatCover
1.FrontCover
z.Base
3.FeedTube
4.WaterDistributionTray
5.WaterPane!
6.Scal~Controllnsert/AoatChember
7.IntegralDamper
8.DamperHandle
9.WaterLevelSensorAssembly
TEMPLATE MUST BE LEVEL DPND.ICXIJ5SIl
housing or cooling coil, if applica-
ble, for clearance of the safety
overflow6ne.Tracearoundtemplate
edges. Remove it and cut the
plenumopening.
Place the unit into the plenum
opening,install six #8x 3/4'Plated
Hex Head SMS screws (not
furnished) at the top and sides of
the unit interior.
4, Install a6' collar in a convanient
location on the opposite plenum.
AttachaSOoelbowandmeasure
the length of 6' round duct
requiredto maketheconnection.
Attach duct with sheet metal
screws. Supportbypassduct in
excessof4'to preventsagging.
5, Re-install the Water Pane!
Evaporatorassemblybackintothe
basa,makingsurethe bottomof
thewaterpanelassemblyis prop-
erlyseatedonthesensorassembly.
Makesurebothfloatstemsextend
throughopeningsin floatcoverand
that floats movefreely up and
down.Pushthefeedtubebackinto
the water distributiontray. (See
Figure2) If the nameplatein the
cover!11)isupsidedown,removeit
bygentlysqueezingthetabsofthe
nameplatefrom insidethe cover
andpushingout Rotatethename-
platesoit isrightsideup,andsnap
beckintoplace.Putthafrontcover
backon.Tumdamperhendle(8).to
theopenposition'winter' for the
heatingseasonor closedposition
'summer'forthecoolingseeson.
6. Installthe AprilairaHumidifier
Controlintheretumair ductusing
the installetion instructions
enclosed. Seereverse sidefor
wiring diagram. For detailed
installetionandwiringinstructions
seeform#UP10005402,included
with humidifier.
furnace or from 120 VAC furnace
accessory terminals. See furnace
manufacturer's recommendations
for wiring.
7, Tap into a water supply line with
the saddle valve furnished. The
humidifier will function with cold,
hot. softened, or unsoftened water.
NOTE: The saddle valve is designed
to be fully opened or closed. Do not
use it to regulate water flow.
8. Connect tubing from the saddle
valve totile inlet side oftile solenoid
valve using 114' 0.0. coppertubing
(not furnished). DOUBLE WRENCH
TO PREVENTLEAKING! (See Figure 3)
9. Connect 1/2' I.D. plastic hose
(not furnished) to safety overflow
line connection at base of unit
and direct to floor drain. Be sure
hose has continuous slope.
NOTE: Do not sweat or directly
attach metal line to frtting. Do not
use solvent type adhesive whl~n
connecting plastic hose. sinl:e
damage to fitting could result.
10, Open saddle valve completely
and turn on furnace. Check to see
if unit is water tight and all electri-
cal components function properly
by utifizing humidification system
check out section of Aprilaire
Humidifier Control Installation
Instructions. form lOP 10005402.
