Assessments - 2, GPA: 4
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Disconnect power and shut off water supply before servicing. IMPORTANT: Clean and refill reservoir, hose, pump and float every 30 days during heating season. 1. Pump Impellor Cap 2. Cap Sides 3. Impellor 4. Cap Flow Control Opening 5. Float 6. Arm Mechanism 6 2 1 3 4 52 A. TO CLEAN RESERVOIR 1. Hold bottom of reservoir (IT IS FILLED WITH WATER) and loosen retainer knob.Carefully lower reservoir, disengaging from metal frame. 2. Empty water, remove partition and reservoir liner. 3. Clean or replace reservoir liner. Reinstall partition in liner. To replace reservoir, hook back of reservoir over lip of dark metal frame and tighten knob. B. TO CLEAN HOSE 1. Disconnect hose from pump and pull hose up through hole. 2. Flex hose to loosen scale and flush clean with a stream of water. 3. Clean nozzle at the same time. C. TO CLEAN PUMP 1. Remove pump impellor cap (1) by pushing down on projecting sides (2). 2. Clean scale from inside of cover and impellor (3) with dull blade. 3. Clean flow control (4) in pump outlet with 5/32” bit. 4. Snap pump impellor cap (1) back in place. 5. Pull water hose down through hole, connect to pump, and attach nozzle into water distribution pan. D. TO CLEAN FLOAT 1. Clean scale off float (5) and arm mechanism (6) with dull blade. 2. Work arm mechanism (6) up and down to dislodge any scale buildup. E. TO OIL MOTOR 1. Disconnect water line at valve inlet and swing line free. Disconnect the humidistat leads. 2. Remove the three screws from the brown motor cover and remove. 3. Use two drops SAE 20 oil in the yellow hole on top and inside the yellow mark on the side of the motor. F. TO REASSEMBLE 1. Replace motor cover. 2. To reinstall reservoir, hook back of reservoir over lip of dark brown metal frame and tighten knob. 3. Reconnect water at valve inlet. 4. To reinstall top cover, hook back under lip of dark brown metal frame and tighten two knobs. 5. Reconnect humidistat or control leads and electrical power. 6. Turn on water supply and fill reservoir in the fall. 7. Check unit operation. 8. Check system operation: Humidifier Control: Automatic Check system operation by setting the knob to “Test.” With furnace blower operating and furnace calling for heat, humidifier will operate for one minute. 9. Set humidistat or Control to its original position. - 11 MAINTENANCE INSTRUCTIONS MAINTENANCE INSTRUCTIONS APRILAIRE HUMIDIFIER MODELS 558-568 CAUTION! Sudden operation may cause personal injury or property damage. Turn humidistat or control to “off” or lowest setting before servicing. MODELS 558-568 1. Front Cover 2. Feed Tube 3. Nozzle 4. Water Panel Evaporative Assembly 5. Distribution Tray 6. ”V” Notches 7. Water Panel 8. Scale Control Insert 9. Drain Hose 7 5 6 8 9 1 2 3 4 1. Note humidistat or control setting and turn dial to the “OFF” position. 2. Turn off water supply. 3. At the side of the unit opposite the airflow duct pull front cover (1) off holding with both hands and set aside. 4. Carefully pull the plastic feed tube (2) out of the nozzle (3) at the top of the Water Panel evaporative assembly (4). Pull this assembly out by grasping at top and tipping out. 5. Remove the black plastic distribution tray (5) from the evaporative assembly by unsnapping the white plastic holding strips from the tabs at the end of the tray. Lightly scrape out any calcium deposits and clean the “V” notches (6), but do not scrape off the granular coating from the bottom. This textured surface helps ensure even water flow for maximum performance. See page 2 if removed. 6. Slide the Water Panel evaporator (7) out from the white plastic Scale Control Insert (8). Clean the Scale Control Insert by twisting and flexing it to loosen the calcium deposits, or use a putty knife. Inspect the Water Panel evaporator (Stock No. 10 for Model 558 and Stock No. 35 for Model 568) and replace with a new Genuine Aprilaire Water Panel if necessary. Slide the Water Panel back into the Scale Control Insert with the black colored spot up and snap the black distributor tray back into place. 7. Re-install the Water Panel evaporative assembly into the unit by fitting its drain tube into the round receptacle at the base of the unit. Push the assembly in at the top against the beveled tabs that will hold it in place. Push the end of the feed tube back firmly into the nozzle and replace the front cover. 8. Remove the drain hose (9) from the bottom of the unit and bend and flex it to loosen the internal calcium deposits. Then flush it with water under pressure and slip it back onto the black drain fitting. 9. Turn on water supply. 10. Check system operation: Humidifier Control: Automatic Check system operation by setting the knob to “Test.” With furnace blower operating and furnace calling for heat, humidifier will operate for one minute. 11. Set Humidifier Control to its original position. - 12 S for APRILAIRE HUMIDIFIER MODEL 600 CAUTION! Sudden operation may cause personal injury or property damage. Turn humidistat or control to “off...
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