Aprilaire 400 Owner's Manual

READ AND SAVE THESE INSTRUCTIONSOwner’s ManualFor Models 400, 550, 600 & 700 Includes Safety & Operating Instructions and Warranty Information

- 8 -For best performance, we recommend that you replace the Water Panelevaporator in your Aprilaire Humidifier annually with the exception ofModel 40

- 9 -1. Disconnect electrical power to the furnace and shut off watersupply.2. Disconnect the water line at theinlet compression nut.3. Remove the in-

MODEL 400- 10 -1. Front Cover2. Feed Tube3. Integral Bypass Damper4. Water Panel EvaporatorAssembly5. Distribution Tray6. “V” Notches7. Water Panel8.

- 11 -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 SUMM

MODEL 700- 12 -4567891231. Front Cover Assembly2. Base3. Water PanelEvaporator Assembly4. Distribution Tray5. ”V” Notches6. Water Panel7. Scale Contro

- 13 -1. Note Humidistat setting and turn dial to the “OFF” position.2. Turn offf water supply. Turn the integral bypass damper (10) to the SUMMER pos

Your Research Products Corporation Aprilaire®Humidifier unit is expressly warranted for one (1)year from date of installation to be free from defects

Genuine Aprilaire Replacement WaterPanel®evaporators are available from yourinstalling contractor or from most otherheating and air conditioning contr

- 1 -With your purchase of a humidification system, you have invested in ahumidifier that operates on the evaporative principle – nature’s own wayof a

- 2 -Capacity is high because an average-size home (10,000 cu. ft.) requiresthe addition of approximately 9 gallons of water per day to maintain 35%re

- 3 -There are 2 possible modes of operation of your Aprilaire HumidifierControl – Automatic and Manual. An explanation of both modes follows:Automati

- 4 -Your Aprilaire Automatic Humidifier, is a high precision system that willaccurately maintain the relative humidity in your home to a maximum of45

- 5 -Manual Mode: (Automatic Mode – see pg 3)Your Aprilaire Humidifier Control is installed in the cold air return. It isimportant to anticipate a dro

- 6 -Your Aprilaire Humidifier Controlis a precision instrument that canbe used to determine the RHaccurately in your home duringthe winter. To do thi

- 7 -Your new Aprilaire Humidifier is controlled by a manual humidistatinstalled either in the living area or in the cold air return. It is important