Performing Routine Maintenance

Fig. 4—Saddle Valve

Fig. 5

•On a Model HUMBBLBP or Model HUMBBLFP humidiﬁer, loosen the thumbscrew that holds the distributor cover to the top of the cabinet. Lift up the distributor cover slightly to make certain that water is ﬂowing from the solenoid valve into the distributor pan. Do not lift the cover off the cabinet more than 1 in. when water is ﬂowing. (See Fig. 6 or 7 according to the model you own.)

SOLENOID VALVE

DISTRIBUTOR COVER

DISTRIBUTOR PAN

EVAPORATOR PAD

CABINET

BOTTOM ACCESS

PANEL

Fig. 6—

Model HUMBBLBP2018-A--

•On a Model HUMBBSBP humidiﬁer, gently pull the latch that secures the access door. Remove the door. Check to see if water is ﬂowing from the solenoid valve into the evaporator pad. (See Fig. 8.)

•On a Model HUMBBSFP humidiﬁer, open the side door or the front cover. If the front cover is opened, hold the pad assem-

bly in place. Check to see if water is ﬂow- ing from the solenoid valve into the distributor pan. (See Fig. 9.)

•On a Model HUMBBWTR unit, look through the window on front of the unit to see that the evaporator pad is rotating and water is ﬂowing. (See Fig. 10.)

The Model HUMBBWTR is controlled by a ﬂoat valve. Turning off the furnace will not affect the water ﬂow until ﬂoat level is achieved. (See Fig. 11.)

SOLENOID VALVE

DISTRIBUTOR COVER

DISTRIBUTOR PAN

EVAPORATOR PAD

CABINET

BOTTOM ACCESS PANEL

Fig. 7—

Model HUMBBLFP1025-A--

INLET

CABINET

SOLENOID VALVE

DISTRIBUTOR PAN

EVAPORATOR PAD

DUCT HOUSING

SIDE ACCESS DOOR

RECTIFIER

DRAIN

Fig. 8—

Model HUMBBSBP2017-A--

CABINET

FRONT COVER

SCREWS (4)

PAD ASSEMBLY

SIDE ACCESS DOOR

Fig. 9—

Model HUMBBSFP1016-A--

4.Turn off the furnace. When the blower stops, look into the humidi- ﬁer to make sure the water is not ﬂowing into the unit.

5.Replace the cover assembly and fasten securely.

6.Now, turn the furnace on and set the thermostat for desired room temperature.

—3—

SHUTDOWN PROCEDURES

To shut down your humidiﬁer, close the saddle valve on the water line. Then turn off the humidistat. When set to the OFF position, the humidistat shuts off the electrical power to the solenoid valve on the humidiﬁer.

NOTE: If your home comfort system in- cludes cooling, be sure the water supply to your humidiﬁer is turned off during the cooling season. Close the damper located in the bypass duct if one is installed. If your humidiﬁer is a Model HUMBBWTR, drain and clean the water pan as described in cleaning procedures.

With the proper maintenance and care, your humidiﬁer will operate economi- cally and dependably. Maintenance can be accomplished easily by referring to the following directions. However, before performing any maintenance, consider these important safety precautions:

•DISCONNECT ALL ELECTRI- CAL POWER TO THE HUMIDIFIER AND FURNACE BEFORE PER- FORMING ANY SERVICE OR MAINTENANCE TO AVOID PER- SONAL INJURY.

BEARING RETAINER

CABINET

PAD

PAN

Fig. 10—

Model HUMBBWTR2019-A--

NOTE: THERE MAY BE MORE THAN 1 ELECTRICAL DISCON- NECT SWITCH.

•ALTHOUGH SPECIAL CARE HAS BEEN TAKEN TO MINIMIZE SHARP EDGES IN THE CONSTRUCTION OF YOUR HUMIDIFIER, BE EXTREME- LY CAREFUL WHEN HANDLING PARTS OR REACHING INTO THE UNIT TO AVOID PERSONAL INJURY.

Your humidiﬁer has been designed for easy disassembly to simplify cleaning and servicing. Your unit must be kept clean to maintain its efﬁciency.