R EAD AND SAVE TH ES E I NSTR UCTI ONS
OWNER’S MANUAL
For Models WB2-12, WB2-17 & WP2-18
Includes Safety, Operating, and Maintenance
Instructions and Warranty
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your new humidifier can do for you, and what you should do to receive maximum
benefits from it. This booklet is intended to answer these questions.
The humidifier operates in conjunction with the furnace blower motor. When
the humidistat calls for humidity and the blower motor is operating, water flows
to the distribution pan located at the top of the unit. The water is uniformly dis-
tributed across the width of the pan and through a scientifically designed system
of outlets. It flows by gravity over the evaporative media. Dry, hot air is moved
through the moisture-laden evaporative media where evaporation takes place.
The now-humidified air carries moisture in vapor form throughout the home.
The correct water flow is determined by an orifice in each unit. When
the unit is operating, there will be a small, steady stream of water to drain,
which flushes away most of the trouble-causing minerals. Do not use the
saddle valve to regulate the water flow. It is designed to be completely opened
or closed.
The minerals and solid residue not trapped by the replaceable evaporative
media are flushed down the drain. The drain also eliminates the problems
caused by stagnant water. This is the most effective and least expensive
method to dispose of trouble-causing minerals.
Trouble-free performance and minimum maintenance are assured by the
design features of the Lennox Healthy Climate Humidifier. All unit housing parts
that come in contact with water are non-metal and will never rust or corrode.
Neither heat nor water will affect them under normal operating conditions.
The evaporative media, designed especially for uniform, high evapora-
tion, and the Scale Control Insert also efficiently trap mineral deposits which
are often the cause of damage to working parts in ordinary humidifiers. No
“white dust” can be distributed throughout the living quarters. The evaporative
media must be in good condition to assure high capacity trouble-free perform-
ance. It should be changed annually.
The granular coating in the bottom of the distribution tray is designed to
provide equal distribution of water to each of the openings assuring an even
flow of water over the evaporative media. Do not clean the mineral scale off the
bottom of the water distribution tray at the end of the humidification season.
The scale provides an excellent track for the water to follow. This is actually
what we try to simulate with the synthetic coating in the bottom of the tray. If
the coating is removed, it is not necessary to purchase a new distribution tray.
You can accomplish the same uniform performance by applying a small
amount of liquid dish soap over the entire lower surface of the water distribu-
tion tray. This will allow the water to flow evenly through each of the openings.
2
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II. Operating Instructions
Your new Lennox Healthy Climate Humidifier is controlled by a manual
humidistat installed either in the living area or in the cold air return. It is important
to anticipate a drop in temperature and reduce the setting accordingly to avoid
excessive condensation. For example, with an outside temperature of 20° the
correct setting will be 35% relative humidity. If the temperature is expected to
fall to 0° that evening, then reduce the setting to 25% several hours prior to the
temperature change.
Observance of the recom-
mended relative humidity level
OUTDOOR-INDOOR RELATIVE HUMIDITY TABLE
on your humidistat (see table)
is an important safeguard.
Condensation of water on inside
windows in the form of fogging
or frost is usually an indication
of excessive relative humidity.
The same condensation can
take place in other areas in
Outside Temperature
Recommended R.H.
+40°
+30°
+20°
+10°
0°
45%
40%
35%
30%
25%
20%
15%
–10°
–20°
your home with the possibility of resulting damage.
Be sure to keep fireplace dampers closed when not in use. They provide an
excellent escape route for heat, as well as humidity.
The humidistat can be used to determine the relative humidity in your home
during the winter. Turn the dial to the lower setting then reverse the dial direc-
tion slowly until a “click” is heard. At this point, read the relative humidity on the
dial. This will be very close to the actual relative humidity in your home.
To check the humidifier operation, set the humidistat above the click point,
make sure that the water saddle valve is open and that there is electricity to the
unit. The furnace blower motor must be operating for the humidifier to function.
After the humidifier has operated for several minutes and water is entering the
unit and coming out at the drain, reduce the humidistat setting below the click
point and the unit should automatically shut off. Now, set the humidistat dial at
the recommended inside relative humidity, depending on the outside tempera-
ture. Follow the suggested settings prior to a drop in the outside temperature.
III. Effect of Water Characteristics
Your humidifier will operate effectively using either hard or mechanically
softened water.
Any type of water (hard, soft, hot, or cold) is acceptable for use with the
WB2 or WP2 drain-type humidifiers. Hot supply water, 140° maximum, is rec-
ommended for all heat pump applications. The use of hot supply water will also
increase the unit’s capacity in other applications.
3
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IV. Annual Maintenance
For best performance, we recommend that you replace the evaporative
media in your humidifier annually.
•
Call the installer of your humidifier. This information is often found on your
equipment.
V. Annual Summer Shutdown
FOR THE SUMMER HUMIDIFIER SHUTDOWN, SIMPLY TURN THE
HUMIDISTAT CONTROL TO THE “OFF” SETTING AND CLOSE THE DAMPER
IN THE WB2-12 AND WB2-17 MODELS.
VI. Periodic Preventative Maintenance
NOTE: Periodic inspection and preventative maintenance of your total heat-
ing system is important for efficient and safe operation. Your Lennox dealer will
include humidifier service during a maintenance inspection.
Your humidifier is equipped with an in-line water strainer and orifice as
shown below. These parts should be inspected and cleaned periodically to
assure continued proper unit performance.
Inspection and Service Instructions
1. Disconnect electrical power to the
furnace and shut off water supply.
2. Disconnect the water line at the inlet
compression nut.
OUTLET
COMPRESSION
NUT
3. Remove the in-line strainer from inside
the inlet side of the valve by using a small
nail or wire.
ORIFICE
4. Flush the in-line strainer clean or
replace with a new strainer, Service
Department, Part No. 4004.
SOLENOID
VALVE
5. Replace the in-line strainer and recon-
nect the inlet water line (Double Wrench
To Prevent Leaking).
INLET
IN-LINE
STRAINER
6. Disconnect the water line at the outlet
compression nut.
INLET
COMPRESSION
NUT
7. Remove the orifice from the copper or
plastic tube and make sure this small
opening is unplugged.
8. Replace the orifice and reconnect the
outlet water line (Double Wrench To
Prevent Leaking).
9. Turn on water supply and reconnect
electrical power to the furnace.
4
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MAINTENANCE INSTRUCTIONS FOR
LENNOX HEALTHY CLIMATE HUMIDIFIER MODELS WB2-12 & WB2-17
2
3
5
1
1. Front Cover
2. Distribution Tray*
3. ”V” Notches
4. Evaporative Media*
5. Scale Control Insert*
6. Drain Hose
4
* Represents the
evaporative assembly
6
CAUTION! Sudden operation may cause personal injury or property damage. Turn
humidistat to “OFF” or lowest setting before servicing.
1. Note humidistat setting and turn humidistat to the “OFF” position.
2. At the side of the unit opposite the airflow duct, pull front cover (1) off holding with both hands
and set aside.
3. Carefully pull the evaporative assembly out by grasping at top and tipping out.
4. Remove the black plastic distribution tray from the evaporative assembly by unsnapping the
white plastic ends of the Scale Control Insert (5) from the tabs at the end of the tray. Lightly
scrape any calcium deposits out of the “V” notches (3), but do not scrape the granular coat-
ing from the bottom of the tray. This textured surface helps ensure even waterflow for
maximum performance. If the granular coating has been removed, place several drops of liq-
uid dish soap on the distribution tray and clean thoroughly. This will only need to be done
once.
5. Slide the evaporative media (4) out from the white plastic Scale Control Insert (5). Clean the
insert frame by twisting and flexing it to loosen the calcium deposits, or use a putty knife.
Inspect the evaporative media (Part No. 52P66 for Model WB2-12 and Part No. 59P94 for
Model WB2-17) and substitute a new one if necessary. Slide the pad back into the insert
frame with color mark up and snap the black distribution tray (2) back into place.
6. Reinstall the evaporative assembly into the unit by fitting its drain tube into the round recep-
tacle at the base of the unit. Push the assembly in at the top against the beveled tabs that
will hold it in place. Replace the front cover.
7. Remove the drain hose (6) from the bottom of the unit and bend and flex it to loosen the
internal calcium deposits. Then flush it with water under pressure and slip it back onto the
black drain fitting.
8. Reset the humidistat and check unit operation.
5
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MAINTENANCE INSTRUCTIONS FOR
LENNOX HEALTHY CLIMATE HUMIDIFIER MODEL WP2-18
5
2
4
6
3
1
1. Front Cover
2. Base
3. Evaporative Assembly
4. Distribution Tray
5. ”V” Notches
7
6. Evaporative Media
7. Scale Control Insert
8. Drain Hose
9. Power Cord
8
9
WARNING! 120 VOLTS may cause serious injury from electrical shock. Disconnect
power and shut off water supply before servicing.
1. Note humidistat setting and turn humidistat to the “OFF” position.
2. Disconnect electrical power and turn off water supply.
3. Unlatch humidifier cover assembly (1) from base assembly (2) at the bottom of the cover, lift,
and set aside.
4. Pull out the evaporative assembly (3) by grasping at the top and tipping out.
5. Remove the black distribution tray (4) from the evaporative assembly by unsnapping the white
plastic ends of the Scale Control Insert (7), from the tabs at the end of the tray. Lightly scrape
any calcium deposits out of the “V” notches (5), but do not scrape the granular coating from
the bottom of the tray. This textured surface helps ensure even waterflow for maximum per-
formance. If the granular coating has been removed, place several drops of liquid dish soap
on the distribution tray and clean thoroughly. This will only need to be done once.
6. Slide the evaporative media (6) out from the white plastic Scale Control Insert (7). Clean the
insert frame by twisting and flexing it to loosen the calcium deposits or use a putty knife.
Replace the evaporative media (Part No. 59P94) back into the Scale Control Insert with the
red colored spot up and snap the black distribution tray (4) back into place.
7. Reinstall the evaporative assembly (3) into the base assembly (2). Push the evaporative assembly
(3) in at the top between the retaining ribs that hold the assembly in place in a vertical position.
8. Remove the drain hose (8) from the bottom of the unit. Bend and flex it to loosen the internal
calcium deposits. Then flush it with water under pressure and slip it back onto the drain fitting.
9. Reinstall cover assembly (1) by hooking at the top of base assembly (2) and latching at the bottom.
10. Reconnect electrical power (9) and turn on water supply.
11. Reset the humidistat and check unit operation.
6
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LIMITED WARRANTY
Your Lennox Healthy Climate Humidifier unit is expressly warranted for one (1) year
from date of installation to be free from manufacturing defects except, however, for the
disposable evaporative media which will have to be replaced from time to time depending
upon the amount of use.
The manufacturer’s exclusive obligation under this warranty shall be to supply, with-
out charge, a replacement for any part of the humidifier which is found to be defective
within one (1) year period and which is returned no later than thirty (30) days after
said one (1) year period by you to the installing contractor together with the model
number, manufacturing code number, and installation date of the humidifier.
THIS WARRANTY SHALL NOT OBLIGATE THE MANUFACTURER FOR ANY LABOR
COSTS AND SHALL NOT APPLY TO DEFECTS IN WORKMANSHIP OR MATERIALS
FURNISHED BY THE INSTALLING CONTRACTOR AS CONTRASTED TO DEFECTS IN
THE HUMIDIFIER ITSELF.
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE SHALL BE LIMITED IN DURATION TO THE AFORESAID ONE YEAR PERIOD.
THE MANUFACTURER’S LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAM-
AGES, OTHER THAN DAMAGES FOR PERSONAL INJURIES, RESULTING FROM ANY
BRANCH OF THE AFORESAID IMPLIED WARRANTIES OR THE ABOVE LIMITED WAR-
RANTY IS EXPRESSLY EXCLUDED. THIS LIMITED WARRANTY IS VOID IF DEFECT(S)
RESULT FROM FAILURE TO HAVE THIS UNIT INSTALLED BY A QUALIFIED HEATING
AND AIR CONDITIONING CONTRACTOR. IF THE LIMITED WARRANTY IS VOID DUE TO
FAILURE TO USE A QUALIFIED CONTRACTOR, ALL DISCLAIMERS OF IMPLIED WAR-
RANTIES SHALL BE EFFECTIVE UPON INSTALLATION.
Some states do not allow limitations on how long an implied warranty lasts or the
exclusion or limitation of incidental or consequential damages so the above exclusion
or limitations may not apply to you.
This warranty gives you specific legal rights and you may also have other rights
which vary from state to state.
DP #10005005 5.4.00
7
504.258M
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