Aprilaire 400 Owner's Manual Page 1

READ AND SAVE THESE INSTRUCTIONSOwner’s ManualFor Models 350, 360, 400A, 400M, 500A,500M, 600A, 600M, 700A & 700MIncludes Safety & Operating I

- 16 - - 17 -9637852141. Note Humidifier Control setting and turn dial to the “OFF” position.2. Turn off water supply. Turn the integral bypass damper

- 18 -Visit us on-line at www.aprilaire.com to register your Aprilaire product.If you do not have on-line access, please mail a postcard with your nam

- 1-Thank you for your recent Aprilaire®humidifier purchase. We appreciateyour business and are pleased to add your name to our growing list ofcustome

- 3-- 2-With your purchase of this humidification system, you have invested in a humidifierthat operates on the evaporative principle – nature’s own w

- 4- - 5-The Automatic Digital Humidifier Control offers two modes of operation,Automatic or Manual. An explanation of both modes follows. (See Figure

- 6- - 7-WATER PANEL CHANGE INDICATORThe control keeps track of humidifier operation time. The yellow “ChangeWater Panel” light flashes after a preset

- 8- - 9-Your Aprilaire humidifier is controlled by a Manual Humidifier Control (seeFigure C). The Manual Humidifier Control is installed either in th

- 11 -- 10 -Be sure to keep fireplace dampers closed when not in use. They provide anexcellent escape route for heat, as well as humidity.On occasion,

- 12 - - 13 -1. Disconnect electrical power to the HVACand shut off water supply.2. Disconnect the water line at the inletcompression nut.3. Remove th

- 14 - - 15 -912611103785214MODELS 350 & 3601. Front Cover2. Feed Tube3. Integral Bypass Damper4. Water Panel EvaporativeAssembly5. Distribution T