Carrier HUMCCLFP1025, HUMCCSFP1016, HUMCCSBP2017, HUMCCWTR2019 Before You Request A “Service Call’’

4.Remove the front door from the humidifier. Rotate the latches one-half turn, then pull the door forward.

5.Remove and inspect the evaporator pad assembly. Lift the bearing from its retainer. (See Fig. 10.) Pull the assembly away from the motor to disengage the assembly shaft from the motor coupling. Remove assembly through the access opening.

Inspect the evaporator pad. If the pad is heavily loaded with scale, or if the local water has a high sulfate content, replace the pad. Contact your dealer for replacement part.

NOTE: For best performance, the evaporator pad should be replaced before each heating season.

6.Inspect the float assembly. Remove the float arm from the valve body by sliding out the pin and lifting off the float arm. (See Fig. 11.) Inspect the rubber valve seat located in- side the float arm. If the seat appears to be nicked or worn, invert the seat or replace it with the spare valve seat located on the float arm. Inspect the water opening in the valve body. If the opening is clogged, use a pin to remove the obstruction. Remove any accumulated deposits from the valve body and float arm.

7.Clean the water pan and unit cabinet. Tilt the water pan and lift it from the unit. Wash the pan with warm, soapy water. Flex the pan to loosen accumulated scale. Wash the unit in- terior, removing any accumulated deposits. Inspect the drain line to insure that no blockage has occurred. Clean as required. (See Fig. 12.)

8.Reassemble your Model HUMCCWTR humidifier. Rein- sert the water pan and drain plug. Ensure that the overflow tube is inserted into the hole at the bottom of the cabinet. Attach the float arm to the valve body by aligning the holes on both parts and reinserting the pin. Do not force or bend the pin. The float arm should have free up-and-down move- ment. Install the evaporator pad assembly. Ensure that the square shaft engages the motor coupling and that the bear- ing washer is located inside the bearing retainer. Turn the water on. Adjust float by rotating until water covers inside of foam drum. Attach the access door and turn the latches.

PIN

BEFORE YOU REQUEST A “SERVICE CALL’’

BEFORE YOU CALL FOR SERVICE, CHECK FOR THESE EASILY SOLVED PROBLEMS:

•Check the main power disconnect switch. Verify that the circuit break- ers are on and that fuses have not blown. If you must reset breakers or replace fuses, do so only once. Con- tact your servicing dealer for assis- tance if the breakers trip or the fuses blow a second time.

•If the humidity level is too low, check the humidistat setting. Confirm that the saddle valve is turned on. Check the evapora- tor pad, and clean or replace the pad as necessary. Check water level in Model HUMCCWTR.

•Check for sufficient airflow. Check the furnace filter or elec- tronic air cleaner for excessive accumulations of dirt. Check for blocked return- or supply-air grilles. Be sure grilles are open and unobstructed.

•If water drips from the humidifier, check the drain hose for kinks or obstructions. If your unit is a Model HUMCCWTR, dripping may indicate that the float valve requires adjustment.

If your comfort system still fails to operate properly, contact your servicing dealer for troubleshooting and repairs. Specify your apparent problem, and state the model and serial numbers of your equipment. (You should have them recorded where noted in this booklet.) With this information, your dealer may be able to offer helpful suggestions over the phone, or save valuable time through knowledgeable preparation for the service call.

FLOAT ARM

HIGHER LOWER

VALVE BODY

VALVE SEAT

REGULAR DEALER MAINTENANCE

Fig. 11 — Float Arm Removal

HUMIDIFIER HOUSING
WATER PAN
OVERFLOW TUBE	DRAIN PLUG

Fig. 12 — Cleaning Water Pan and Unit Cabinet

9.Turn on electrical power supplies. Refer to startup proce- dures listed on page 3.

In addition to the routine maintenance that you perform, your humidifier should be inspected regularly by a properly trained service technician. The inspection (preferably each year, but at least every other year) should include the following:

•Routine inspection of the humidifier. Cleaning, if necessary. Cleaning or replacement of the evaporator pad as required.

•A check of all electrical wiring and connections.

•A check of water connections to the unit.

•Operational check of the complete comfort system to deter- mine actual working condition. Necessary repair and/or adjust- ment should be performed at this time.

Your servicing dealer may offer an economical service contract that covers seasonal inspections. Ask for further details.

5