Aprilaire 350 Safety & Operating Instructions Manual

Owner’s Manual For Models 350, 360, 400, 400M, 500, 500M, 600, 600M, 700 & 700M Includes Safety & Operating Instructions and Warranty Information Humidifiers ...

Thank you for your recent Aprilaire ® humidifier purchase. We appreciate your business and are pleased to add your name to our growing list of customers. You have invested in the highest quality equipment available. Aprilaire manufactures whole-house indoor air quality products and is a recognized leader in the heating and air conditioning industry. Y ...

- 2 - With your purchase of this humidification system, you have invested in a humidifier that operates on the evaporative principle – nature’s own way of adding moisture – providing optimum relative humidity (RH) throughout the heating season. It is very possible that you have questions concerning your new humidifier – questions on what it can ...

- 5 - The Digital Humidifier Control offers two modes of operation, Automatic or Manual. An explanation of both modes follows. (See Figure A on page 5 for Automatic Mode. See Figure B on page 6 for Manual Mode.) When in the Automatic Mode, this system offers the following benefits: • You will always receive the optimum amount of humidity so that you ...

- 7 - Water Panel change indicator The control keeps track of humidifier operation time. The yellow “Change Water Panel” light flashes after a preset amount of running time has elapsed. This running time is preset by the installer based on the humidifier model and water hardness. Refer to the Annual Maintenance section for instructions on changing ...

- 9 - Your Aprilaire humidifier is controlled by a Manual Humidifier Control (see Figure C). The Manual Humidifier Control is installed either in the cold air return duct or on an interior wall of the home. With the Manual Humidifier Control, it is important to anticipate a drop in outdoor temperature and reduce the setting accordingly to avoid excessi ...

- 10 - Be sure to keep fireplace dampers closed when not in use. They provide an excellent escape route for heat, as well as humidity. On occasion, indoor moisture producing activities such as clothes drying, cooking, showers, etc., may raise the RH level higher than it should be, even though the Aprilaire humidifier is not operating. Telltale indicat ...

- 13 - NOTE: Periodic inspection and preventative maintenance of your total heating system is important for efficient and safe operation. Your heating contractor can service your humidifier when he services the HVAC system. All models have a distribution tray above the Water Panel, which should be inspected annually and cleaned of excess mineral depos ...

- 15 - 9 12 6 11 10 3 7 8 5 2 1 4 MODELS 350 & 360 1. Front Cover 2. Feed Tube 3. Integral Bypass Damper 4. Water Panel Evaporative Assembly 5. Distribution Tray 6. “V” Notches 7. Water Panel Evaporator 8. Scale Control Insert/Float Chamber 9. Overflow Drain Line 10. Float Cover 11. Float 12. Water Level Sensor Ass ...

- 17 - 9 6 3 7 8 5 2 1 4 1. Note Humidifier Control setting and turn dial to the “OFF” position. 2. Turn off water supply. Turn the integral bypass damper (3) to the SUMMER position. 3. Press the tabs in the latches on the top and bottom of front cover (1) and pull cover off base with both hands. Set aside. 4. Carefully pull the plasti ...