Humidifiers Owner’s Manual For Models 350, 360, 400A, 400M, 500A, 500M, 600A, 600M, 700A & 700M Includes Safety & Operating Instructions and Warranty Information READ AND SAVE THESE INSTRUCTIONS
TABLE OF CONTENTS INTRODUCTION Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Operating Instructions – Models 400A, 400M, 500A, 600A & 700A . . . . .4 • Automatic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 • Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRINCIPLE OF OPERATION 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 do for you, and what you should do to receive maximum benefits from it. This booklet is intended to answer these questions.
OPERATING INSTRUCTIONS – MODELS 400A, 500A, 600A & 700A The Automatic 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.
WATER PANEL CHANGE INDICATOR MANUAL MODE 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 characteristics. FIGURE B – Manual Mode Refer to the Annual Maintenance section for instructions on changing the Water Panel or call your heating and air conditioning dealer for service.
TABLE 3 – Operation Guide Condition Solution Condensation on windows. Reduce the setting on the control dial by 1 increment. Lack of humidity. Increase the setting on the control dial by 1 increment. Humidifier does not operate. (Solenoid does not “click” when control is moved to “Test/Reset” position.) Turn dial to “Test/Reset”. Make certain HVAC blower is operating and HVAC is calling for heat. If unit still does not operate, consult a heating contractor. Humidifier won’t shut off.
ADDITIONAL INFORMATION FOR ALL MODELS 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 indications are condensation or frost on cold surfaces such as windows, doors, walls, etc.
ANNUAL SUMMER SHUTDOWN For Models 400A, 400M, 500A, 500M, 600A and 600M close the bypass damper, which is a part of the humidifier, with the small damper handle. Humidifier Control: Automatic Digital Humidifier Control in Automatic Mode (see Figure A): No adjustment is necessary. Automatic Digital Humidifier Control in Manual Mode (see Figure B): Set the knob to the “OFF” position. Manual Humidifier Control (see Figure C): Set the knob to the “OFF” position.
REQUIRED MAINTENANCE INSTRUCTIONS (APRILAIRE HUMIDIFIER MODELS 350 & 360) (APRILAIRE HUMIDIFIER MODELS 400A & 400M) CAUTION WARNING 120 volts may cause serious injury from electrical shock. Disconnect power and shut off water supply before servicing. 4 2 9 5 3 1. Inlet Grille 2. Distribution Tray 3. Scale Control Insert 4. Distribution Tray Cover 5. Water Panel Evaporator 6. Drain Spud 7. Power Cord 8. Metal Housing 9.
REQUIRED MAINTENANCE INSTRUCTIONS (APRILAIRE HUMIDIFIER MODELS 700A & 700M) CAUTION WARNING Sudden operation may cause personal injury or property damage. Turn Humidifier Control to “OFF” or lowest setting before servicing. 4 5 3 8 1. Front Cover 7 1 2. Base Assembly 4. Water Panel Evaporative Assembly 3. Water Panel Evaporative Assembly 5. Distribution Tray 4. Distribution Tray 6. “V” Notches 2 3 4 1. Humidifier Cover Assembly 6 2. Feed Tube 3.
LIMITED WARRANTY Your Research Products Corporation Aprilaire humidifier unit is expressly warranted for five (5) years from date of installation to be free from defects in materials or workmanship except, however, for the disposable Water Panel which will have to be replaced from time to time depending upon the amount of use.
