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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 inside the float arm. If the seat appears to be nicked or worn, invert the seat or replace it with the spare valve seat BODY HIGHER LOWER VALVE SEAT 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 procedures listed on page 2. 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 interior, 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 HUMBBWTR humidifier. Reinsert 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-anddown movement. Install the evaporator pad assembly. Ensure that the square shaft engages the motor coupling and that the bearing 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 FLOAT ARM VALVE —4— 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 breakers are on and that fuses have not blown. If you must reset breakers or replace fuses, do so only once. Contact your servicing dealer for assistance 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 evaporator pad, and clean or replace the pad as necessary. Check water level in Model HUMBBWTR. • Check for sufficient airflow. Check the furnace filter or electronic 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 HUMBBWTR, 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. REGULAR DEALER MAINTENANCE In addition to the routine maintenance that you perform, your humidifier should be inspected regularly by a prop...

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