Performing Routine Maintenance

SHUTDOWN PROCEDURES

To shut down your humidiﬁer, close the saddle valve on the wa- ter line. Then turn off the humidistat. When set to the OFF posi- tion, the humidistat shuts off the electrical power to the solenoid valve on the humidiﬁer.

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

With the proper maintenance and care, your humidiﬁer will op- erate economically and dependably. Maintenance can be accom- plished easily by referring to the following directions. However, before performing any maintenance, consider these important safety precautions:

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

BEARING RETAINER

CABINET

PAD

PAN

Fig. 10 — Model HUMCCWTR2019-A--

NOTE: THERE MAY BE MORE THAN 1 ELECTRICAL DISCONNECT SWITCH.

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

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

Regular inspection allows you to determine the cleaning sched- ule best suited to your humidiﬁer’s operating conditions. The frequency for required maintenance will depend most upon the available water supply. In areas where hard water and high min- eral content are prevalent, more frequent cleaning and servicing may be required.

At minimum, the humidiﬁer will need to be cleaned at the be- ginning of every heating season.

CLEANING PROCEDURES

Models HUMCCLBP, HUMCCSBP, HUMCCLFP, and

HUMCCSFP

1.Turn off all electrical power to the humidiﬁer and furnace or fan coil.

2.Turn off the humidiﬁer’s water supply. (See Fig. 4.)

3.Disassemble the humidiﬁer.

•To disassemble a Model HUMCCSBP humidiﬁer, gently pull the latch that secures the access panel. Remove the door and slide the evaporator pad assembly out of the unit. (See Fig. 8.)

•To disassemble either a Model HUMCCLBP or Model HUMCCLFP humidiﬁer, ﬁrst remove the water supply con- nection to the solenoid valve. Next, remove the screw that holds the distributor cover to the cabinet, and lift off the cover. Disconnect the drain line from the sump and loosen the thumbscrew(s) holding the sump to the cabinet. Remove the sump. Remove evaporator pad assembly. (See Fig. 6 or 7, according to the model you own.)

•To disassemble a Model HUMCCSFP, the pad assembly can be removed from the side access door or the front cover. When removing the side door, lift the pad assembly up by holding the tabs and slide the assembly out. When removing the front cover on Model HUMCCSFP, disconnect the quick connects to the solenoid valve, unscrew the 4 screws to the front cover, snap loose the top and bottom catches, and lay the front cover aside. Once the front cover is off, lift the pad assembly up and twist it out. The pad assembly consists of 4 parts; the distributor pan, frame, sump, and the evaporator pad. Pull the distributor pan apart from the frame and the evaporator pad can be removed. Do not force the evaporator pad in or out without removing the dis- tributor pan as this will distort the pad.

4.Clean the humidiﬁer’s external components.

•If your humidiﬁer is a Model HUMCCSBP humidiﬁer, wash the access door and outlet drain portion of the cabinet. Make sure the drain is open.

•If your humidiﬁer is a Model HUMCCLBP or HUMCCLFP, wash the distributor cover, sump cover, and cabinet. Be sure the inlet ports are open and clean. Then, clean the sump with a solu- tion of detergent and water.

5.Clean the internal components of your humidiﬁer. Wash the distributor pan with a mild detergent and warm water. Be sure holes and slots in the pan are clean and unobstructed. Wash the evaporator pad assembly in a detergent solution. If there are scale deposits on the pad, soak it in ordinary household vinegar. If the pad is covered by a heavy deposit of scale, or if the local water supply has high sulfate or cal- cium content, replace the pad with a new one. Contact your dealer for replacement part.

6.Reassemble your humidiﬁer.

7.Turn on the electrical power and water supplies. Refer to the startup procedures.

Model HUMCCWTR

1.Turn off all electrical power to the humidiﬁer and furnace or fan coil.

2.Turn off the humidiﬁer’s water supply. (See Fig. 4.)

3.Drain water from the unit. Place a pail underneath the drain plug located on the bottom of the humidiﬁer cabinet. Lift the tab on the drain plug and remove the plug. Allow all water to drain from the unit. (See Fig. 12.)