READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING
TEMPLATE MUST BE LEVEL
– TOP –
READ REVERSE SIDE FIRST!
READ REVERSE SIDE FIRST!
Figure 1
Figure 2
Figure 3
10009370 B2205451A 4.11
90-1067
90-1068
90-1069
FURNISHED ITEMS
ITEMS NOT FURNISHED
Built-in bypass damper
24 VAC Humidifier Control
24 VAC Transformer
Saddle valve
Humidifier Installation Template
Humidifier Control manuals
Mounting screws
(sheet metal screws)
Water supply line (
1
⁄
4
” copper)
Drain line (
1
⁄
2
” I.D. hose)
18 gauge low voltage wire
6” bypass ductwork
Current Sensing Relay (if required)
Hose clamp
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.
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 10”W x 12
3
⁄
4
”H,
being careful to avoid
injury from sharp edges.
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. Seal duct
seams and humidifier base
with foil tape or mastic.
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). Snap into
place. If evaporative
assembly does not snap
into place, reverse the
assembly. Push the feed
tube 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.
Locate and install the
Manual Humidifier Control
by following the instructions
shown in step #7A. For
Automatic Humidifier
Control installation
instructions, see Publication
No. 504,879M included with
the Automatic Control.
DISCONNECT ELECTRICAL
POWER TO FURNACE
BEFORE PROCEEDING!
LOCATION
1. Locate on inside wall of
living area approximately
5 feet above floor, or in the
furnace return air plenum.
If humidifier is mounted on
return duct, Humidifier
Control must be at least 6”
upstream of humidifier.
2. Do not locate Control in the
direct path of furnace
discharge air or drafts from
open doors and windows.
3. Do not install where
operation might be affected
by lamps, sunlight, fireplace
registers, radiators,
concealed air ducts and
pipes, or next to activities
that generate moisture.
4. The basic rules for location
of thermostats also apply
to humidifier controls.
8.
The humidifier solenoid valve
and Humidifier Control operate on
24 VAC. In order for the humidifier
to turn on, the furnace blower
must be operating and the
Humidifier Control must be calling
for humidity. See Humidifier
Control manuals for Control
wiring.
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.
WARNING:
RISK OF SCALDING. Water
temperature over 125°F can
cause severe burns and scalding
instantly. Shut off the hot water
supply before disconnecting or
tapping into any hot water supply
line.
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. When installing
humidifier on return plenum, it is
recommended that the humidifier
is supplied with hot water.
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 valve using
1
⁄
4
” O.D.
copper tubing (not furnished).
DOUBLE WRENCH AS SHOWN IN
FIGURE 3 TO PREVENT DAMAGE
TO VALVE BRACKET AND
ENSURE WATERTIGHT
CONNECTION.
NOTE:
BEFORE LEAVING THE
JOB SITE, MAKE SURE:
1. Saddle valve is fully open.
2. There are no plumbing leaks.
3. Humidifier functions properly.
4. Bypass damper is in proper
position.
GENERAL INSTRUCTIONS
1.
Do not attempt to repair or
recalibrate Humidifier
Control. Humidifier Controls
requiring service should be
returned to your Lennox
dealer.
2. Use humidifier control in
low voltage (24 VAC)
applications only. Install
24 VAC wiring to humidifier
control as shown in Wiring
Diagrams, opposite side.
3. Make sure no bare wires
are exposed or insulation
damaged. Insulation on wire
should extend to head of
binding screws.
4. Make sure all splices are
mechanically and
electrically secure.
5. To remove dirt or other
foreign matter from nylon
ribbon and control interior,
dust lightly with a fine,
soft brush.
8
5
3
4
1
11
6
9
7
2
10
12
13
14
15
90-1435
11.
Drain spud is designed to
accept
1
⁄
2
” I.D. plastic hose (not
furnished). Run drain line from
drain spud to floor drain or
alternate drain location.
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 check for leaks.
Turn on blower system.
HCWB3-17 & HCWB3-17K
–
Adjust humidifier setting so that
humidifier will turn on. Allow
humidifier to run until water is
observed coming out of drain line.
Check to see if humidifier and
saddle valve are watertight.
Check operation to make sure
that all electrical components
function properly. Set Control to
recommended level. (See
operating instructions in owners
manual.)
HCWB3-17A & HCWB3-17AK
–
Use humidification “System
Checkout” section of Automatic
Humidifier Control Installation
Instructions, Publication No.
504,879M. Check to see if
humidifier and saddle valve are
watertight. Check operation to
make sure that all electrical
components function properly.
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
9. Drain Spud
10. Hole Plug
11. Nameplate
12. Solenoid Valve
13. Strainer
14. Orifice
15. Transformer
TRACE ALONG OUTER EDGE
TRACE ALONG OUTER EDGE
7A.
MANUAL HUMIDIFIER CONTROL INSTALLATION
INSTRUCTIONS FOR HCWB3-17 & HCWB3-17K:
The enclosed
Manual Humidifier Control is designed for low voltage service to
control humidification equipment. An increase in relative humidity
expands the nylon ribbon which opens the control switch to stop
operation on the humidifier. A decrease in relative humidity
reverses the process and closes the control switch. (For detailed
Manual Humidifier Control installation and wiring instructions,
see Publication No. 506407−01 included with Control.)
