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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 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
Current Sensing Relay Part No.
BAYRLY10ASENSA (if required)
1.
Remove front cover by pressing
center tabs on top and bottom of the
cover (1) and base (2). Pull feed tube
(3) out of the water distribution tray
(4). Tip the evaporative assembly
forward and lift it out of the
humidifier. (See Figure 1)
2.
The humidifier comes assembled
for left side discharge. If converting
to right side discharge, the base can
be rotated so round collar is facing
to the right. Swap the location of the
hole plug (10) and drain spud (9) if
using a right side discharge. To
remove the cap, push and twist from
inside the housing while lifting the
cap up slightly on the outside. To
remove the drain spud, twist and
push from the outside of the base.
3.
Using a level, position this
template at least 3 inches above the
furnace housing or cooling coil, if
applicable, for clearance of the
drain line. Trace around template
edges. Remove the template and
accurately cut the plenum opening
7
5
9
⁄
"W x 12
⁄
"H, being careful to
8
8
avoid injury from sharp edges.
1. Front Cover
2. Base
3. Feed Tube
4. Water Distribution Tray
5. Humidifier Pad
6. Scale Control Insert
7. Integral Damper
8. Damper Handle
2
9. Drain Spud
10. Hole Plug
11. Nameplate
12. Solenoid Valve
7
90-1108
8
TEMPLATE MUST BE LEVEL
4.
Place the humidifier into the
plenum opening, install six sheet
metal mounting screws (not
furnished) at the top and sides of the
humidifier interior.
5.
Install a 6" collar in a convenient
location on the opposite plenum.
Attach a 90° elbow and measure the
length of 6" round duct required to
make the connection. The design of
the humidifier collar provides a solid
connection with the bypass duct
through the use of inside support ribs
and pre-formed holes for sheet metal
screws. Slip the duct inside the
collar of the humidifier, up to the
support ribs. Using the pre-formed
holes at the top and bottom of the
humidifier collar, secure the duct to
the humidifier collar with two sheet
metal mounting screws (not
furnished). Support bypass ducts
longer than 4 feet to prevent sagging.
6.
Reinstall the evaporative
assembly back into the base, with
the bottom of the scale control insert
(6) sitting firmly in the inside of the
drain spud (9). Push the feed tube
PARTS LIST
10
9
6
1
– TOP –
Figure 1
Figure 2
90-1067
back into the water distribution tray.
(See Figure 2) Put the front cover
back on. If the nameplate (11) is
upside down, remove it and rotate
the nameplate so it is right side up,
and snap back into place. Turn
damper handle (8) to the open
position "WINTER" for the heating
season, or closed position
"SUMMER" for the cooling season.
7.
Install the Automatic Humidifier
Control in the return duct using the
installation instructions enclosed
(see Wiring Diagram, opposite side).
For detailed installation and wiring
instructions, see "Installer's Guide/
Automatic Humidifier Control,
Form #18-CH31D1-2" included with
the humidifier.
8.
The Automatic Humidifier Control
must be powered by a 24 VAC power
source connected to the "R" and "C"
terminals on the Control. The 24 VAC
humidifier solenoid valve receives
power through the Control. Connect
the yellow wires to the "H" terminals
on the Control. Do not connect
yellow wires to accessory terminals
on furnace or damage to the
humidifier could result.
12
4
3
5
11
READ REVERSE SIDE FIRST!
Figure 3
90-1068
In order for the humidifier to turn on,
the furnace blower must be
operating and the control must be
calling for humidity. The interface
between the humidifier and the
furnace to detect blower operation
can be accomplished several
different ways:
A. If the Control is powered directly
from 24 VAC accessory terminals on
the furnace, which are activated
only during furnace blower
operation or a heat call, then the
yellow wires from the humidifier can
be connected directly to the "H"
terminals on the Control.
B. If the Control is powered by a
transformer connected to 120 VAC
"HUM" terminals on the furnace,
which are activated only during
furnace blower operation or a heat
call, then the yellow wires from the
humidifier can be connected directly
to the "H" terminals on the Control.
C. If the Control is powered from a
continuous 24 VAC source, then a
Current Sensing Relay Part No.
BAYRLY10ASENSA (not included)
must be installed in the humidifier
circuit. (Yellow wires connected to
"H" terminals on Control.)
Do not wire transformer into furnace
blower circuit. The transformer can
be powered from the 120 VAC line
before it enters the furnace.
9.
Tap into a water supply line with
the saddle valve furnished. See
instructions on saddle valve package.
The humidifier will function with cold,
hot, softened or unsoftened water.
The use of service hot water
(140°F MAX.) and constant blower
operation will provide maximum
evaporative capacity. When
installing humidifier on heat pump
system, humidifier must be supplied
with service hot water.
IMPORTANT!
Be sure User's Information Guide
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
NOTE: The saddle valve is designed
to be fully opened or closed. Do not
use it to regulate water flow.
10.
Connect tubing from the saddle
valve to the inlet side of the solenoid
1
valve using
⁄
" O.D. copper tubing
4
(not furnished). DOUBLE WRENCH
TO PREVENT LEAKING!
(See Figure 3)
11.
Drain spud is designed to
1
accept
⁄
" I.D. plastic hose (not
2
furnished). Run drain line from drain
spud to floor drain. CAUTION: If hose
clamp is used, do not over tighten,
drain spud could crack. Be sure
drain line has continuous slope.
NOTE: Do not sweat or directly
attach metal drain line to fitting. Do
not use solvent type adhesive when
connecting plastic drain line, since
damage to fitting could result.
12.
Open saddle valve completely
and turn on furnace. Turn up
humidifier control so that humidifier
will turn on. Allow humidifier to run
until water is observed coming out
of the drain line. Check to see if
humidifier and saddle valve are
watertight. Check operation to make
sure that all electrical components
function properly by utilizing
humidification system check-out
section in the "Installer's Guide/
Automatic Humidifier Control,
Form #18-CH31D1-2". Set humidifier
control to level recommended in the
"User's Information Guide".
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.
18-CH29D1-2
10006961 B2204066B 7.08
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