Healthy Climate Solutions HCWB2 Series User manual

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USER’S MANUAL FOR HCWB2 AND HCWP2 HUMIDIFIERS
505,289M
08/2007
Supersedes 02/2007
KAZ # C.6046
HCWB2 & HCWP2 SERIES
IAQ −− HUMIDIFIERS Litho U.S.A.
E2007
Dallas, Texas, USA
Table Of Contents
Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Humidifier Operation 1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Instructions −− Manual Humidistat 2. . . . . . . .
Operating Instructions −− Universal Humidistat 2. . . . . .
Operating Instructions (Automatic Mode) 3. . . . . . . . . .
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
Operating Instructions (Manual Mode) 3. . . . . . . . . . . .
Effect of Water Characteristics 4. . . . . . . . . . . . . . . . .
Annual Maintenance 4. . . . . . . . . . . . . . . . . . . . . . . . . .
Annual Shutdown 4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dealer Instructions for Preventative Maintenance 4.
Introduction
This manual includes information that will familiarize you
with your humidifier. It also details routine maintenance
required to keep the humidifier working properly.
Electric shock hazard. Can cause injury
or death. Disconnect all electrical power
supplies before servicing. Shut off water
supply before disconnecting or tapping
into any water supply line.
WARNING
!
Risk of Equipment Damage. After humidifier
installation is completed, turn water supply back
on.
CAUTION
!
Humidifier Operation
This humidifier provides the proper relative humidity (RH)
during the heating season. The humidifier is wired to
operate when the indoor blower motor is on during the
heating mode and the indoor RH is below the selected
comfort level. During a call for humidity, water flows into
the EquaFlotdistribution tray, where it is distributed
evenly across the width of the pan. The humidifier pad is
saturated with water. Dry hot air moves through the pad
where evaporation takes place. The humidified air carries
moisture in vapor form throughout the home.
Risk of Equipment Damage. Do not use the saddle
valve to regulate water flow. The valve is designed
to be completely opened or closed.
CAUTION
!

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During humidifier operation, a steady stream of water
flows to the drain. This water flushes away minerals and
other particles of solid residue. Some particles are
trapped by the humidifier pad. This eliminates the white
dust" which is often mentioned in complaints about other
systems. The water flow and drain design also eliminate
problems caused by stagnant water.
The humidifier pad must be in good condition to assure
trouble−free performance. It should be changed at least
annually.
All humidifier parts that come in contact with water are
non−metal and will never rust or corrode. Neither heat nor
water will affect the humidifier components under normal
operating conditions.
HCWB2−12 and −17 and HCWP2−18
Operating Instructions
HCWB2−12 and −17 and HCWP2−18 humidifiers are
controlled by a manual humidistat, which is installed
either in the living area or on the return air plenum.
It is important to keep the humidistat setting at the
recommended level in order to avoid excessive indoor
RH. This will prevent the formation of condensation on
inside windows (fogging or frost on windows). For
example, with an outside temperature of 20ºF the correct
setting will be 35% RH. If the temperature is expected to
fall to 0ºF that evening, then adjust the setting to 25%
several hours prior to the temperature change.
The manual humidistat can be used to determine the RH
in your home during the winter. Turn the dial to the lowest
setting, then reverse the dial direction slowly until you
hear the solenoid valve click on. At this point, read the RH
value on the dial. This will be very close to the actual RH
in your home.
FIGURE 1
CONTROL
KNOB
MANUAL HUMIDISTAT
TABLE 1
Relative Humidity (RH) Settings
Outside Temperature
(Fahrenheit) Recommended RH
+40°45%
+30°40%
+20°35%
+10°30%
0°25%
–10°20%
–20°15%
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 power 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 RH,
depending on the outside temperature. It is important to
anticipate changes in the outdoor temperature and to
adjust the setpoint prior to a drop in the outside
temperature.
Be sure to keep fireplace dampers closed when not in
use. Chimneys provide an excellent escape route for
heat, as well as humidity.
HCWB2−12A and −17A and HCWP2−18A
Operating Instructions
HCWB2−12A and −17A and HCWP2−18A humidifiers are
controlled by a universal humidifier control, which offers
two modes of operation: automatic and manual. When
installed in the automatic mode the system benefits you
in the following ways:
1 − The control automatically adjusts your home’s RH
based on the outdoor temperature.
2 − The control eliminates the need to manually adjust
the control.
3 − The universal humidistat precisely controls the RH in
your home, ensuring maximum comfort for a greater
percentage of time. The universal humidistat also
prevents excess condensation or low humidity in the
home.
4 − The universal humidistat eliminates the need to turn
the dial setting to OFF during the summer season.
Automatic Mode
Immediately after installation, the universal humidistat
must be set to match your home’s condition. Follow these

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steps to adjust the automatic humidifier control. See
figure 2.
FIGURE 2
CONTROL
KNOB
UNIVERSAL HUMIDISTAT
PAD
REPLACEMENT
TIMER RESET
BUTTON
7
6
5
4
3
21
NORMAL
O FF
HUMIDIFIER
CONTROL
TEST
1 − Turn the knob to setting 5, which is within the normal
range. During the next 24 to 48 hours, it may be
necessary to adjust the dial for more or less humidity,
depending on your personal comfort and the home’s
requirements. See table 2.
TABLE 2
Operation Guide
Condition Solution
Condensation on windows. Reduce the setting on the control
dial by one increment at a time.
Lack of humidity. Increase the setting on the control
dial by one increment at a time.
Humidifier does not operate.
(solenoid does not click" when
control is moved to TEST
position.)
Make sure power is available to the
solenoid valve. Turn dial to TEST.
Make certain furnace blower is
operating and furnace is calling for
heat. If unit still does not operate,
consult a heating contractor.
Humidifier won’t shut off Turn dial to OFF. If unit continues to
operate, consult a heating
contractor.
Test Mode System operation is checked by
setting the knob to TEST. Make
certain that the furnace blower is
operating and furnace is calling for
heat. Humidifier will operate for one
minute.
2 − During the coldest portion of the first heating season,
minor adjustments may be necessary, depending on
the home’s construction. See table 2.
The RH in your home will be accurately controlled to meet
your needs and should not need further adjustment
during future heating seasons. Make note of the dial
setting in the event the knob gets moved.
Your humidifier is part of a system that will accurately
maintain the RH in your home. For every 1°F change in
outdoor temperature, the universal humidistat will
automatically adjust the indoor relative humidity by 0.5%
RH. If you would like to determine the RH in your home,
follow these steps:
1 − Determine the outdoor temperature.
2 − Activate the furnace blower by setting your
thermostat fan switch to the ON position, or by setting
your thermostat to a higher temperature.
3 − Turn the control dial setting to the OFF position.
Then, slowly turn the dial clockwise until you hear the
solenoid valve click on. Slowly turn the dial
counterclockwise until you hear the solenoid valve
click off. At this point, make note of the dial setting.
4 − Locate your dial setting on table 3. Follow the dial
setting to the right until it intersects with the current
outdoor temperature. This is the RH in your home
under existing conditions.
5 − Return the thermostat and control to their original
settings.
TABLE 3
Percentage Relative Humidity (RH)
Outdoor Temperature (°F)
Dial
Setting −10 0 10 20 30 40
110 10 10 15 20 25
210 10 15 20 25 30
310 15 20 25 30 35
415 20 25 30 35 40
520 25 30 35 40 45
625 30 35 40 45 45
730 35 40 45 45 45
As an example, if the outdoor temperature is 20°F and,
following step 3, the humidifier turns off at 5"on the dial
range, then the RH in your home is 35%.
The universal humidistat will accurately control the
humidity in your home to a maximum of 45% RH and a
minimum of 10% RH. The values of outdoor temperature
and dial settings may fall in between or outside of the
listed values in table 3. In these cases, you will be able to
approximate your home’s actual indoor RH.
Manual Mode
If an outdoor temperature sensor has not been installed
with your universal humidistat, the control is installed in
the cold air return and is set for manual mode operation.
In this case, it is important to keep the humidistat setting
at the recommended level in order to avoid excessive
indoor RH. This will prevent the formation of
condensation on inside windows (fogging or frost on
windows). For example, with an outside temperature of
20ºF the correct setting will be 35% RH. If the temperature
is expected to fall to 0ºF that evening, then adjust the
setting to provide 25% RH several hours prior to the
temperature change.
The recommended settings noted on the sticker on the
front of the control and in table 1 are based on years of
research and experience. For example, a winter time
indoor RH of 50% may be considered by you to be ideal
for your personal comfort; however, this setting may
result in damage to your home. Observance of the
recommended RH levels on your humidistat, therefore, is
an important safeguard. These settings represent a

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compromise between RH levels that are desirable for
comfort reasons and humidity levels, which will avoid
condensation on your windows.
The humidistat can be used to accurately determine the
RH in your home during the winter. With the furnace
blower operating at the heating speed, turn the dial to the
lowest setting, then reverse the dial direction slowly until
you hear the solenoid valve click on. At this point, read the
RH on the dial. This will be very close to the actual RH in
your home. To check the humidifier operation, set the
knob to TEST. Make sure that the water saddle valve is
open and that there is electricity to the unit. Generally, the
furnace blower motor must be operating for the humidifier
to function. After the humidifier has operated for one
minute and water is entering the unit and coming out at
the drain, reduce the humidistat setting to the
recommended inside RH, depending on the outside
temperature. Do not leave in the control in the test mode.
The humidifier will not operate properly in the test mode.
Anticipate a drop in the outside temperature and lower the
setting several hours before the drop in outdoor
temperature occurs.
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 HCWB2 or HCWP2 humidifiers. Hot
supply water (140°F maximum) is recommended for all
heat pump applications. The use of hot supply water will
also increase the unit’s capacity.
Risk of Scalding. Water temperature
over 125°F can cause severe burns and
can scald instantly. Shut off the hot wa-
ter supply before disconnecting or tap-
ping into any hot water supply line.
WARNING
!
Annual Maintenance
For best performance, you should replace the humidifier
pad at least annually. Call your dealer for preventative
maintenance and replacement components.
Annual Shutdown
For the summer humidifier shutdown, turn the universal
humidistat or manual humidistat to the OFF setting
(HCWB2−12, 17 and 17A and HCWP2−18 and −18A) and
close the damper (HCWB2−12, −12A, −17 and 17A).
Maintenance
NOTE − Annual inspection and maintenance is important
for efficient and safe operation of your humidifier. Call
your dealer for humidifier service and maintenance
inspection. Parts are available through your Lennox
dealer.
Your humidifier is equipped with an in−line water strainer
and orifice as shown. These parts should be inspected
and cleaned periodically to assure continued proper unit
performance. Inspect more often if white dust" is evident.
FIGURE 3
SOLENOID VALVE COMPONENTS
OUTLET
COMPRESSION
NUT
INLINE
STRAINER
SOLENOID
VALVE
INLET
ORIFICE
INLET
COMPRESSION
NUT
1 − Disconnect electrical power to the furnace and shut
off water supply.
2 − Disconnect the water line at the inlet compression
nut.
3 − Use a small nail or wire to remove the in−line strainer
from inside the inlet side of the valve.
4 − Flush the in−line strainer clean or replace with a new
strainer.
5 − Reinstall the in−line strainer and reconnect the inlet
water line. Use the double−wrench technique to
prevent leaking.
6 − Disconnect the water line at the outlet compression
nut.
7 − Check the orifice to make sure the small opening is
unplugged. Do not try to remove the orifice from the
copper tube.
8 − Reinstall the orifice and reconnect the outlet water
line. Use the double−wrench technique to prevent
leaking.
9 − Check to ensure that the copper tube is inside the
plastic sleeve.
10− Turn on water supply and reconnect electrical power
to the furnace.
11− Allow the system to operate for a few minutes. Check
for water leaks and re−tighten fittings, if necessary.

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HCWB2 REQUIRED MAINTENANCE
Component identification for the following procedure is
listed in figure 3.
Electric shock hazard. Can cause injury
or death. Disconnect all electrical power
supplies before servicing. Shut off wa-
ter supply before disconnecting or tap-
ping into any water supply line.
WARNING
!
1 − Disconnect main power to furnace.
2 − Make a note of the humidistat setting and turn
humidistat to the OFF position.
3 − Turn off water supply.
4 − Slide the plastic latch to release the humidifier cover.
Swing the cover open, then lift it away from the
assembly.
5 − Turn the damper handle to the SUMMER" position.
Grasp the tabs on the pad assembly frame and lift the
assembly out of the humidifier cabinet.
6 − Unsnap the pad assembly from the tabs on the sides
of the distribution tray. Remove the distribution tray
from the pad assembly. Lightly scrape off any mineral
deposits from the surface of the distribution tray.
7 − Slide the humidifier pad out of the frame. Twist and
flex the frame to loosen the calcium deposits on the
frame or use a putty knife to clean the frame. Replace
the humidifier pad annually or more frequently if
necessary. Slide the pad back into the frame with the
black mark facing up. Snap the distribution tray back
into place.
8 − Position the pad frame assembly so that the tabs are
pointing outward. Align the drain extension on the
pad assembly with the drain spud in the humidifier
base. Reinsert the humidifier pad assembly in the
base. Push the pad assembly in at the top until the
assembly snaps into place. Replace the front cover.
Turn the damper handle to the WINTER" position.
9 − Remove the drain hose from the bottom of the
humidifier. Bend and flex the hose to loosen any
internal calcium deposits. Flush the hose with water
under pressure and slip it back onto the drain spud.
The drain hose should have a constant downward
slope and must not be flattened or blocked.
10− Turn on water supply.
11− Check humidifier operation:
Manual Humidistat − Adjust humidistat to highest
setting and make sure the furnace blower is
operating. Humidifier will operate if RH is less than
50%.
Universal Humidistat − Check system operation by
setting the knob to TEST position. With furnace
blower operating and furnace calling for heat,
humidifier will operate for one minute. Press the
RESET button on the side of the control to reset the
Change Humidifier Pad" indicator.
12− Set manual humidistat or universal humidistat to its
original position.
FIGURE 4
HCWB2 Humidifier Parts Identification
HUMIDIFIER
BASE
HUMIDIFIER PAD
ASSEMBLY
(with frame tabs
pointing outward)
SOLENOID
VALVE
DRAIN HOSE
DISTRIBUTION
TRAY
DAMPER
WINTER/SUMMER
ADJUSTMENT LEVER
(Close damper during
summer operation)
LATCH
TABS

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HCWP2 REQUIRED MAINTENANCE
Component identification for the following procedure is
listed in Figure 4.
Electric shock hazard. Can cause injury
or death. Disconnect all electrical power
supplies before servicing. Shut off wa-
ter supply before disconnecting or tap-
ping into any water supply line.
WARNING
!
1 − Disconnect main power to furnace.
2 − Make a note of the humidistat setting and turn
humidistat to the OFF position.
3 − Disconnect electrical power and turn off water supply.
4 − Pull the tab to release the control harness.
Disconnect the harness.
5 − Release the humidifier cover latch at the bottom of
the humidifier assembly. Swing the cover open, then
lift it away from the assembly.
6 − Grasp the tabs on the pad assembly frame and lift the
assembly out of the humdifier cabinet.
7 − Unsnap the pad assembly from the tabs on the sides
of the distribution tray. Remove the distribution tray
from the pad assembly. Lightly scrape off any mineral
deposits from the surface of the distribution tray.
8 − Slide the humidifier pad out of the frame. Twist and
flex the frame to loosen the calcium deposits on the
frame or use a putty knife to clean the frame. Replace
the humidifier pad annually or more frequently if
necessary. Slide the pad back into the frame with the
black mark facing up. Snap the distribution tray back
into place.
9 − Position the pad frame assembly so that the tabs are
pointing outward. Align the drain extension on the
pad assembly with the drain spud in the humidifier
base. Reinsert the humidifier pad assembly in the
base. Push the pad assembly in at the top until the
assembly snaps into place.
10 −Remove the drain hose from the bottom of the
humidifier. Bend and flex the hose to loosen the
internal calcium deposits. Flush the hose with water
under pressure and slip it back onto the drain spud.
The drain hose should have a constant downward
slope and must not be flattened or blocked.
11− Reinstall the front cover by hooking at the top of base
assembly and latching at the bottom.
12− Reconnect the control harness. Make sure that the
plug snaps into place.
13− Reconnect electrical power and turn on water supply.
14− Check humidifier operation:
Manual Humidistat − Adjust humidistat to highest
setting and make sure the furnace blower is
operating.
Universal Humidistat − Check system operation by
setting the knob to TEST. With furnace blower
operating and furnace calling for heat, humidifier will
operate for one minute. Press the RESET button on
the side of the control to reset the Change Humidifier
Pad" indicator.
13. Set manual humidistat or universal humidistat to its
original position.
FIGURE 5
HCWP2 Humidifier Parts Identification
FRONT COVER
HUMIDIFIER
BASE
HUMIDIFIER
PAD
SOLENOID
VALVE
DISTRIBUTION
TRAY
PAD ASSEMBLY
FRAME
DRAIN HOSE
POWER CORD