READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING
TEMPLATE MUST BE LEVEL
READ REVERSE SIDE FIRST!
READ REVERSE SIDE FIRST!
Figure 1
18-CH28D1-4
10013279 B2208146A 7.18
90-923
90-924
90-925
90-926
Figure 2
Figure 3
Figure 4
1.
Place the humidifier on a flat surface.
Unlatch humidifier cover assembly from base
assembly at the bottom of the cover, lift and
set aside. Pull out the evaporative assembly
by grasping at the top and tipping out.
(See Figure 1)
2.
Using a level, position this template at
least 1
1
⁄
2
inches above the furnace housing
or cooling coil if applicable, for clearance
of the drain line. Trace around template
edges. When there is insufficient space on
the supply plenum, the humidifier can be
installed on the return duct provided the
humidifier is supplied with hot water. Remove
the template and accurately cut the plenum
opening 14
3
⁄
4
”W x 14
5
⁄
16
“H,
being careful to
avoid injury from sharp edges.
3.
Position the two plastic hooks on the top
of base along the top edge of the plenum
opening. Push base up to engage the two
hooks and sheet metal along the top edge
opening. Push base in and slide down so
that the bottom four hooks engage the sheet
metal at the bottom edge of the opening.
Secure base to opening using top three
screw holes in housing. An additional hole is
provided at the bottom for securing the base
to the plenum.
(See Figure 2)
4.
While pressing the base against the plenum,
reach through the center opening and turn left
and right swing latches down to secure the
base onto the plenum.
(See Figure 3)
5.
Reinstall the evaporative assembly into
the base, with the bottom of the scale control
insert (5) sitting firmly in the inside of the
drain spud attached to the base. Push the
evaporative assembly in at the top between
the retaining ribs that hold the assembly in
place in a vertical position. Reinstall cover
assembly by hooking at the top of base
assembly and latching at the bottom.
6.
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-CH31D1-3” included with the humidifier.
7.
The humidifier power cord must be plugged
into a 120 VAC outlet. Do not use an extension
cord. Do not power 120 VAC outlet from the
furnace blower circuit. The Automatic Humidifier
Control must be powered from a 24 VAC source
connected to the “R” and “C” terminals on the
control. The 24 VAC humidifier wires (brown)
must be connected to the “H” terminals on the
control.
CAUTION: Do not connect brown wires
to “ACC” or “HUM” terminals on furnace or
damage to the humidifier could result.
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 humidifier is plugged into a
continuously powered 120 VAC outlet and
the humidifier control “R” and “C” terminals
receive 24 VAC from a transformer that is
powered from the “HUM” terminals of the
integrated furnace control board (IFC), or
24 VAC from the low voltage terminal strip
“W” and “B/C” of the IFC, the two brown wires
from the humidifier can be connected directly
to the “H” terminals on the humidifier control.
B.
If the humidifier is plugged into a 120 VAC
outlet that is only powered when the furnace
burner and blower for air distribution is in
operation, then the humidifier control “R”
and “C” terminals can be supplied with
continuous 24 VAC, and the two brown wires
from the humidifier can be connected directly
to the “H” terminals on the humidifier control.
C.
If the humidifier is plugged into a
continuously powered 120 VAC outlet and 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. (Brown
wires connected to “H” terminals on control.)
8.
Tap into 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.
NOTE: The saddle valve is designed to be
fully opened or closed. Do not use it to
regulate water flow.
9.
Connect tubing from the saddle valve to
the inlet side of the solenoid valve using
1
⁄
4
”
O.D. copper tubing (not furnished).
DOUBLE WRENCH TO PREVENT LEAKING!
(See Figure 4)
10.
Drain spud is designed to accept
1
⁄
2
” I.D.
plastic hose (not furnished). Run drain line from
drain spud to floor drain.
CAUTION: If hose
clamp is used, do not overtighten, 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 adhesives when connecting plastic drain
line, since damage to fitting could result.
11.
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-CH31D1-3”. Set
humidifier control to level recommended in
the “Use and Care manual”.
FURNISHED ITEMS
Automatic Humidifier Control
Automatic Humidifier Control
Installation Sheet
24 VAC Transformer
Saddle Valve
Humidifier Installation Template
Mounting screws
(sheet metal screws)
Water supply line (1/4” copper)
Drain line (1/2” I.D. hose)
Low voltage wire
Current Sensing Relay Part No.
BAYRLY10ASENSA (if required)
ITEMS NOT FURNISHED
IMPORTANT!
Be sure Use and Care 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.
PARTS LIST
NOTE:
BEFORE LEAVING THE
JOB SITE, MAKE SURE:
1. Saddle valve is fully open.
2. All plumbing connections are
watertight.
3. Humidifier functions properly.
TOP
6
7
12
5
2
3
16
4
18
9
14
11
10
8
13
15
17
1
19
20
21
90-1436
1. Front Cover
2. Base
3. Orifice Plate
4. Motor Mount Bridge
5. Scale Control Insert
6. Humidifier Pad
7. Water Distribution Tray
8. Fan Blade
9. Motor
10. Motor Mount Gasket
11. Relay
12. Power Cord
13. Strain Relief Bushing
14. Solenoid Valve
15. Connector Plug
16. Feed Tube
17. Nozzle
18. Relay Connector
19. Transformer
20. Strainer
21. Orifice
