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READ REVERSE SIDE FIRST!
RE D COMPLETE S FETY INSTRUCTIONS
FURNISHED ITEMS
Built-in bypass damper
24 VAC Humidifier Control
24 VAC Transformer
Saddle valve
Humidifier Installation Template
Humidifier Control manuals
ITEMS NOT FURNISHED
Mounting screws (sheet metal screws)
1
Water supply line (
⁄
" copper)
4
Drain line (
1
⁄
" I.D. hose)
2
18 gauge low voltage wire
6" bypass ductwork
Current Sensing Relay (if required)
Hose clamp
1.
6.
Remove front cover by
Reinstall the evaporative
pressing center tabs on top and
assembly back into the base,
bottom of the cover (1) and base
with the bottom of the scale
(2). Pull feed tube (3) out of the
control insert (6) sitting firmly
water distribution tray (4). Tip the
in the inside of the drain spud
evaporative assembly forward
(9). Snap into place. If
and lift it out of the humidifier.
evaporative assembly does
(See Figure 1)
not snap into place, reverse
2.
the assembly. Push the feed
The humidifier comes
tube back into the water
assembled for left side
distribution tray. (See Figure 2)
discharge. If converting to right
Put the front cover back on. If
side discharge, the base can be
the nameplate (11) is upside
rotated so round collar is facing
down, remove it and rotate the
to the right. Swap the location of
nameplate so it is right side
the hole plug (10) and drain spud
up, and snap back into place.
(9) if using a right side discharge.
Turn damper handle (8) to the
To remove the cap, push and
open position "WINTER" for
twist from inside the housing
the heating season, or closed
while lifting the cap up slightly on
position "SUMMER" for the
the outside. To remove the drain
cooling season.
spud, twist and push from the
7.
outside of the base.
Locate and install the Manual
3.
Humidifier Control by following
Using a level, position this
the instructions shown in step
template at least 3 inches above
#7A. For Automatic Humidifier
the furnace housing or cooling
Control installation instructions,
coil, if applicable, for clearance
see Publication No. 504,879M
of the drain line. Trace around
included with the Automatic
template edges. Remove the
Control. DISCONNECT
template and accurately cut the
1
1
ELECTRICAL POWER TO
plenum opening 9
⁄
" x 9
⁄
",
2
2
FURNACE BEFORE
being careful to avoid injury
PROCEEDING!
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
1. Front Cover
the humidifier interior.
2. Base
5.
Install a 6" collar in a
3. Feed Tube
convenient location on the
4. Water Distribution Tray
opposite plenum. Attach a 90°
5. Humidifier Pad
elbow and measure the length of
6. Scale Control Insert
6" round duct required to make
7. Integral Damper
the connection. The design of the
8. Damper Handle
humidifier collar provides a solid
9. Drain Spud
connection with the bypass duct
10. Hole Plug
through the use of inside support
11. Nameplate
ribs and pre-formed holes for
12. Solenoid Valve
sheet metal screws. Slip the duct
13. Strainer
inside the collar of the humidifier,
14. Orifice
up to the support ribs. Using the
15. Transformer
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.
TEMPL TE MUST BE LEVEL
– TOP –
7A.
MANUAL HUMIDIFIER CONTROL INSTALLATION INSTRUCTIONS
FOR HCWB3-12 & HCWB3-12K: 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.)
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.
10
2
9
7
6
8
90-1435
15
TRACE ALONG OUTER EDGE
ND INST LL TION TEMPL TE BEFORE ST RTING
Figure 1
Figure 2
90-1067
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.
13
12
4
14
3
5
1
11
TRACE ALONG OUTER EDGE
READ REVERSE SIDE FIRST!
Figure 3
90-1068
8.
11.
The humidifier solenoid valve and
1
Humidifier Control operate on 24 VAC.
⁄
" I.D. plastic hose (not furnished). Run
2
In order for the humidifier to turn on,
drain line from drain spud to floor drain
the furnace blower must be operating
or alternate drain location. CAUTION: If
and the Humidifier Control must be
hose clamp is used, do not over tighten,
calling for humidity. See Humidifier
drain spud could crack. Be sure drain
Control manuals for Control wiring.
line has continuous slope. NOTE: Do
not sweat or directly attach metal drain
Do not wire transformer into furnace
line to fitting. Do not use solvent type
blower circuit. The transformer can be
adhesive when connecting plastic
powered from the 120 VAC line before it
drain line, since damage to fitting could
enters the furnace.
result.
9.
Tap into a water supply line with the
12.
saddle valve furnished. See instructions
check for leaks. Turn on blower system.
on saddle valve package. The
HCWB3-12 & HCWB3-12K – Adjust
humidifier will function with cold, hot,
humidifier setting so that humidifier
softened or unsoftened water.
will turn on. Allow humidifier to run
WARNING: RISK OF SCALDING. Water
until water is observed coming out of
temperature over 125°F can cause
drain line. Check to see if humidifier
severe burns and scalding instantly.
and saddle valve are watertight. Check
Shut off the hot water supply before
operation to make sure that all
disconnecting or tapping into any hot
electrical components function
water supply line. The use of service
properly. Set Control to recommended
hot water (140°F MAX.) and constant
level. (See operating instructions in
blower operation will provide maximum
owners manual.)
evaporative capacity. When installing
HCWB3-12A & HCWB3-12AK – Use
humidifier on heat pump system,
humidification "System Checkout"
humidifier must be supplied with
section of Automatic Humidifier Control
service hot water. When installing
Installation Instructions, Publication
humidifier on return plenum, it is
No. 504,879M. Check to see if
recommended that the humidifier is
humidifier and saddle valve are
supplied with hot water.
watertight. Check operation to make
NOTE: The saddle valve is designed to
sure that all electrical components
be fully opened or closed. Do not use it
function properly.
to regulate water flow.
10.
Connect tubing from the saddle
valve to the inlet side of the solenoid
NOTE: BEFORE LEAVING THE
1
valve using
⁄
" O.D. copper tubing (not
4
JOB SITE, MAKE SURE:
furnished). DOUBLE WRENCH AS
SHOWN IN FIGURE 3 TO PREVENT
1. Saddle valve is fully open.
DAMAGE TO VALVE BRACKET AND
ENSURE WATERTIGHT CONNECTION.
2. There are no plumbing leaks.
3. Humidifier functions properly.
4. Bypass damper is in proper
IMPORT NT!
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
Drain spud is designed to accept
Open saddle valve completely and
position.
10009369 B2205450A 4.11
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