WARNING ! CAUTION ! CAUTION !
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1. 505 289M 08 2007 2007 Dallas Texas USA IAQ HUMIDIFIERS Technical Publications Litho U S A HCWB2 amp HCWP2 SERIES Supersedes 02 2007 KAZ C 6046 USER S MANUAL FOR HCWB2 AND HCWP2 HUMIDIFIERS Table Of Contents Introduction 0 cee eee eee ees 1 Humidifier Operation 2 22200 0000 eee 1 Operating Instructions Manual Humidistat 2 Operating Instructions Universal Humidistat 2 Operating Instructions Automatic Mode 3 Operating Instructions Manual Mode 3 Effect of Water Characteristics 4 Annual Maintenance 2 22 0055 4 Annual Shutdown 2 02202 0e eee 4 Dealer Instructions for Preventative Maintenance 4 RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE 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 Risk of Equipment Damage After humidifier installation is completed turn water supply back on Humidifier Operation This humidifier provides the proper relative humidity RH during the heating season The humidifier is wired to operate when the indoor bl2. 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 20 F the correct setting will be 35 RH If the temperature is expected to fall to O F 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 MANUAL HUMIDISTAT CONTROL KNOB HEALTHY GLIMATE WHEN OUTSIDE TEMP IS 20 0 20 HUMIDITY RESET HUMIDITY TO 15 25 35 FIGURE 1 TABLE 1 Relative Humidity RH Settings Outside Temperature Recommended RH Fahrenheit 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 cli
3. B HUMIDIFIER 3 CONTROL REPLACEMENT TIMER RESET BUTTON FIGURE 2 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 eonation seuton Cond ti ind Reduce the setting on the control OngensauOn ON WINGOWS 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 Make sure power is available to the solenoid does not click when solenoid valve Turn dial to TEST control is moved to TEST Make certain furnace blower is position 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 seaso
4. 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 Set manual humidistat or universal humidistat to its original position HCWP2 Humidifier Parts Identification DISTRIBUTION SOLENOID HUMIDIFIER BASE FRONT COVER DRAIN HOSE POWER CORD FIGURE 5
5. ace 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 Page 4 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 7 ter supply before disconnecting or tap ping into any water supply line 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 Un
6. ation 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 HCWB2 Humidifier Parts Identification DISTRIBUTION SOLENOID DAMPER WINTER SUMMER ADJUSTMENT LEVER Close damper during summer operation TABS ay S HUMIDIFIER BASE HUMIDIFIER PAD DRAIN HOSE ASSEMBLY with frame tabs pointing outward FIGURE 4 Page 5 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 Disconnect main power to furnace Make a note of the humidistat setting and turn humidistat to the OFF position Disconnect electrical power and turn off water supply Pull the tab to release the control harness Disconnect the harness Release the humidifier cover latch at the bottom of the humidifier assembly Swing the cover open then lift it away from the assembly Grasp the tabs on the pad assembly frame and lift the assembly out of the humdifier cabinet Unsnap the pad assembly from the tabs on the sides of the dis
7. ck 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 Page 2 steps to adjust the automatic humidifier control See figure 2 UNIVERSAL HUMIDISTAT CONTROL 6 a NORMAL 5 KNO
8. e 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 s
9. ns 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 Dial Setting E 5 6 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 outdo
10. or 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 20 F the correct setting will be 35 RH If the temperature is expected to fall to 0 F 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 Page 3 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 hom
11. ower 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 EquaFlo distribution 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 Page 1 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
12. snap 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 oper
13. tribution tray Remove the distribution tray from the pad assembly Lightly scrape off any mineral deposits from the surface of the distribution tray 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 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 13 Page 6 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 Reinstall the front cover by hooking at the top of base assembly and latching at the bottom Reconnect the control harness Make sure that the plug snaps into place Reconnect electrical power and turn on water supply Check humidifier operation Manual Humidistat Adjust humidistat to highest setting and make sure the furnace blower is operating Universal Humidistat
14. upply before disconnecting or tap ping into any hot water supply line 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 SOLENOID VALVE COMPONENTS HS OUTLET COMPRESSION NUT A oN ORIFICE A SOLENOID VALVE ws INLET INLINE i STRAINER INLET COMPRESSION NUT FIGURE 3 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 repl
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