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

In areas where hard water and high mineral content are prevalent, more frequent cleaning and servicing may be required. At minimum, the humidifier will need to be cleaned at the beginning of every heating season. CLEANING PROCEDURES Models HUMBBLBP, HUMBBSBP, HUMBBLFP, and HUMBBSFP 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 HUMBBSBP humidifier, gently

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

REFRESHING MOISTURE . . . AS NATURE INTENDED Congratulations on your excellent choice and sound investment in this addition to your home comfort system. Your humidifier represents both the latest in engineering development and the culmination of many years of experience from one of the most reputable manufacturers of comfort systems. Your new unit is among the most energy- efficient and reliable home humidifiers available today. To assure its dependability, spend a few minutes now with this book

Make sure the drain is open. • If your humidifier is a Model HUMBBLBP or HUMBBLFP, wash the distributor cover, sump cover, and cabinet. Be sure the inlet ports are open and clean. Then, clean the sump with a solution 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 dep

The typical process of humidification begins when water flows through the humidifier valve and soaks the large evaporator pad. Hot, dry air from the furnace passes through the pad and absorbs the water. Then, this moisture-laden air is distributed throughout the house via the ductwork. See Fig. 1, 2, and 3. Fig. 1 Fig. 2 Fig. 3 EVAPORATOR PAD HUMIDIFIED AIR DRY AIR DRAIN DRY AIR HUMIDIFIED AIR TYPICAL INSTALLATIONS OPERATING YOUR HUMIDIFIER Your new humidifier is designed to operate as part of y

Adjust the humidistat setting according to the outside temperature. Refer to Table 2 as a general guide. If after several days, the air in your home seems too moist, lower the humidistat setting. Condensation on single-pane windows indicates excessive moisture. If the air is too dry, increase the setting. Dry throat and nasal passages indicate dry air. • All models come with a humidistat. Continuous blower operation provides for constant humidification. It may also contribute to greater personal

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 PERSONAL INJURY. BEARING RETAINER CABINET PAD PAN Fig. 10— Model HUMBBWTR2019-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 REAC

REFRESHING MOISTURE . . . AS NATURE INTENDED Congratulations on your excellent choice and sound investment in this addition to your home comfort system. Your humidifier represents both the latest in engineering development and the culmination of many years of experience from one of the most reputable manufacturers of comfort systems. Your new unit is among the most energy- efficient and reliable home humidifiers available today. To assure its dependability, spend a few minutes now with this book

7— Model HUMBBLFP1025-A- INLET CABINETRECTIFIER SOLENOID VALVE DISTRIBUTOR PAN EVAPORATOR PAD DUCT HOUSING SIDE ACCESS DOOR 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 humidifier 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 temp