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READ REVERSE SIDE FIRST!
READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING
FURNISHED ITEMS
Built-in bypass damper
24 VAC Transformer
Automatic Digital Humidifier Control
Automatic Humidifier Control
Installation Sheet
Saddle valve
Humidifier Installation Template
ITEMS NOT FURNISHED
Mounting screws (sheet metal screws)
Water supply line (
1
⁄
" copper)
4
Drain line (
1
⁄
" I.D. hose)
2
Low voltage wire
Bypass ductwork
Model 50 Current Sensing Relay
(if required)
1.
Press top & bottom tabs
to remove cover (1).
Pull feed tube (3) out of
distribution tray (4). Remove
Water Panel
®
Evaporator
assembly. See Figure 1.
2.
Humidifier is supplied
with bypass duct
connection on left. For right
side bypass, swap location
of water level sensor
assembly (9) and cap (10).
3.
Position template on
supply or return plenum.
Make sure template is
level. Allow clearance for
drain line and for servicing.
For Aprilaire Humidifier Parts Drawing 2007, click here.
1. Front Cover
2. Base
3. Feed Tube
4. Water Distribution Tray
5. Water Panel Evaporator
10
2
9
7
8
90-1263
TEMPLATE MUST BE LEVEL
Trace template outline.
6.
Cut 10" wide x 12-3/4"
Evaporator assembly into
high opening. Avoid injury
base. Make sure bottom of
from sharp edges.
scale control insert (6) is
seated in water level sensor
4.
Place humidifier base
assembly (9). Snap top of
(2) in opening and secure
evaporator assembly into
with 6 screws in openings
base. Insert feed tube into
provided.
distribution tray. See Figure 2.
5.
Select location for 6"
Make sure float cover (14) is
collar on opposite plenum
snapped into place and that
to minimize length and
floats (13) move freely up and
number of elbows in
down. Rotate nameplate (11)
bypass duct. Install 6"
if necessary, so it is right side
bypass duct components.
up. Place point bypass damper
Attach duct to humidifier
handle (8) to "WINTER" (open)
collar using 2 screws in
for heating season and
openings provided.
"SUMMER" for cooling
season.
PARTS LIST
6. Scale Control Insert/Float Chamber
7. Integral Damper
8. Damper Handle
9. Water Level Sensor Assembly
10. Hole Plug
12
3
6
– TOP –
Figure 1
Figure 2
90-1165
Insert Water Panel
11. Nameplate
12. Solenoid Valve
13. Float
14. Float Cover
4
5
1
14
13
11
READ REVERSE SIDE FIRST!
Figure 3
90-1068
7.
Control installation and
wiring. Disconnect electrical
power to furnace before
wiring control. In order for
humidifier to operate,
furnace must be on and RH
must be below set-point of
control. Wiring diagram
illustrates recommended
method of detecting furnace
operation.
• Select location for control
on return duct at least 6"
upstream of bypass duct
connection or humidifier.
Position template on duct
and mark location of RH
sensor opening. Drill 3/4"
hole for sensor. Knob and
cover must be removed to
mount control. Place
control on duct with RH
sensor extending into duct
opening. Make sure gasket
is in place around sensor
cage. Secure humidistat to
duct using 2 screws in
openings provided.
• Control must be powered
by a continuous 24 V
source. See wiring diagram
on template and control
instructions for 24 V control
connections.
8.
Humidifier will function
with cold, softened or
unsoftened water. Saddle
valve provided may be used
to tap into water supply.
IMPORTANT!
Be sure owner's manual containing
instructions for operation and warranty information is given to
owner in order to avoid unnecessary calls. Warranty is void unless
humidifier is installed by qualified heating and air conditioning
contractor due to possible misapplication of product.
90-1069
See installation instructions
on saddle valve package.
Saddle valve is designed to
be fully opened or closed. Do
not use to regulate flow.
9.
Run 1/4" copper tubing
from saddle valve to solenoid
valve. DOUBLE-WRENCH TO
PREVENT LEAKING. See
Figure 3.
10.
Run 1/2" I.D. hose from
drain spud to floor drain.
Make sure drain has constant
downward slope and is not
kinked. Do not over-tighten
hose clamp onto drain spud.
Do not use solvent adhesive
on drain spud.
11.
Check humidifier
operation. Open saddle valve
and turn control to highest
setting. Turn on furnace.
Make sure all electrical
connections are secure and
all plumbing connections are
water-tight. Set control to
proper setting.
NOTE: BEFORE LEAVING
THE JOB SITE, MAKE SURE:
1. Saddle valve is fully open.
2. All plumbing connections
are watertight.
3. Humidifier functions
properly.
4. Bypass damper is in
proper position.
10007290 B2204305B 09.07
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