Page 2 - OFF; or lowest setting before servicing.; INTRODUCTION; Be sure to register your humidifier warranty online at; or
TABLE OF CONTENTS INTRODUCTION 3 PRINCIPLE OF OPERATION 4 OPERATING INSTRUCTIONS – MODELS 400, 500, 600 & 700 6 Digital Humidifier Control Indicator Lights 6 Blower Activation 6 Automatic Mode 7 Manual Mode 8 OPERATING INSTRUCTIONS – MODELS 400M, 500M, 600M & 700M 11 CHECK THE HUMIDIFIER OPE...
Page 3 - PRINCIPLE OF OPERATION; The Water Panel® evaporator is the heart
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 quest...
Page 4 - FIGURE A; – AUTOMATIC MODE
OPERATING INSTRUCTIONS – MODELS 400, 500, 600 & 700 The Digital Humidifier Control offers two modes of operation, Automatic or Manual An explanation of both modes follows (See FIGURE A on page 7 for Automatic mode See FIGURE B on page 8 for Manual mode) When in the Automatic mode, this system of...
Page 5 - TABLE 2; – % RELATIVE HUMIDITY GUIDE; FIGURE B; – MANUAL MODE; TABLE 1; – OUTDOOR
MANUAL MODE When installed in the Manual mode (see FIGURE B – internal switch in MAN position and M in the display), it is important to anticipate a drop in outdoor temperature and reduce the setting accordingly to avoid excessive condensation For example, with an outdoor temperature of 20°F the cor...
Page 6 - TABLE 3; – OPERATION GUIDE; OPERATING INSTRUCTIONS –; CHECK THE HUMIDIFIER OPERATION; MANUAL HUMIDIFIER CONTROL; FIGURE C; – MANUAL HUMIDIFIER CONTROL
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 If the humidifier control is already at the maximum setting of 7 , set the BLOWER ACTIVATION switch to O...
Page 7 - Begin by pressing the ON button; ADDITIONAL INFORMATION FOR ALL MODELS; Water temperature over 125°F can cause severe burns; FIGURE D; – DIGITAL HUMIDIFIER CONTROL
DIGITAL HUMIDIFIER CONTROL (INCLUDED WITH MODEL 300) To test the function of the humidifier and the control: Begin by pressing the ON button ON will appear on the display This means the control is on, but it does not necessarily mean the humidifier is running In order for the control to turn on your...
Page 8 - ANNUAL MAINTENANCE; To purchase a new Water Panel:; Humidifying; ANNUAL SUMMER SHUTDOWN; PERIODIC PREVENTATIVE MAINTENANCE; WATER LINE INSPECTION AND SERVICE INSTRUCTIONS; Unit
ANNUAL MAINTENANCE For best performance, we recommend that you replace the Water Panel evaporator in your Aprilaire humidifier at least annually with the exception of Models 400 and 400M which should be changed at least twice per heating season. The Change Water Panel indicator light (Digital Contro...
Page 9 - APRILAIRE HUMIDIFIER MODEL 300; WARNING; REQUIRED MAINTENANCE INSTRUCTIONS; CAUTION
9 12 6 11 10 3 7 8 5 2 1 4 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 Assembly 1....
Page 10 - MODEL 7
MODEL 500 & 600 SERIES MODEL 7 00 SERIES 8 2 9 3 1 4 5 6 7 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 c...
Page 11 - LIMITED WARRANTY; WARRANTY REGISTRATION
Aprilaire.com P.O. Box 1467 Madison, WI 53701-1467 800.334.6011 F: 608.257.4357 Printed in USA©2021 Aprilaire – Division of Research Products Corporation 10015434 B2209190B 3.21 LIMITED WARRANTY Your Research Products Corporation Aprilaire® humidifier unit is expressly warranted for five (5) years f...
