Instruction/ maintenance manual of the product 445 Aprilaire
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READ AND SA VE THESE INSTRUCTIONS Includes Safety , Operating and Maintenance Instructions and W arranty T ABLE OF CONTENTS PAGE Introduction ................................................Inside Front Cover Principle of Operation ...................
W ARNING! 120 volts may cause injury from electrical shock. Disconnect power and shut off water supply before servicing. CAUTION! Sudden operation may cause personal injury or property damage.
I. PRINCIPLE OF OPERA TION With your purchase of a humidification system, you have invested in a humidifier that operates on the evaporative principle – nature’ s own way of adding moisture – and will provide the pr oper r elative humidity all during the heating season.
- 2 - not trapped by the replaceable W ater Panel evaporator are flushed down the drain. The drain also eliminates the problems caused by stagnant water . This is the most effective and least expensive method to dispose of trouble-causing minerals. There ar e some homes wher e drain facilities are not accessi- ble or available.
II. OPERA TING INSTRUCTIONS Automatic Humidifier Control: (Manual humidistat-see pg 5) Your Automatic Humidifier Control is installed in the cold air return. During the first heating season, your Automatic Humidifier Control needs to be set initially to match your home’s condition.
Your Aprilaire Automatic Humidifier, is a high precision system that will accurately maintain the relative humidity in your home. For every 1º change in outdoor temperature, the control will automatically adjust the indoor relative humidity (RH) by 1 ⁄ 2 %.
- 5 - Manual Humidistat: (Automatic Humidifier Control – see pg 3) Y our new Aprilaire Humidifier is controlled by a humidistat installed either in the living area or in the cold air r eturn. It is important to anticipate a drop in outdoor temperatur e and reduce the setting accordingly to avoid excessive condensation.
- 6 - T o check the humidifier operation, set the humidistat above the click point, make sure that the water saddle valve is open and that there is electricity to the unit. Generally , with all models except the 350 and 360 Aprilaire Humidifiers, the furnace blower motor must be operating for the Aprilaire Humidifier to function.
- 7 - either case, the W ater Panel evaporator is usually changed once a year . In the Models 448 and 445 Aprilaire Humidifiers, these solids will build up on the evaporator surface, in the reservoir and pump section. This is why proper maintenance is important and necessary .
- 8 - Inspection and Service Instructions 1. Disconnect electrical power to the furnace and shut off water supply. 2. Disconnect the water line at the inlet com- pression nut. 3. Remove the in-line strainer from inside the inlet fitting by using a small nail or wire.
- 9 - MODELS 558-550-568-560 1. Note humidistat or control setting and turn dial to the “ OFF ” position. 2. Turn off water supply. 3. At the side of the unit opposite the airflow duct pull front cover (1) off hold- ing with both hands and set aside.
- 10 - MODELS 768-760 1. Note humidistat or control setting and turn dial to the “ OFF ” position. 2. Disconnect electrical power and turn off water supply. 3. Unlatch humidifier cover assembly (1) from base assembly (2) at the bottom of the cover, lift, and set aside.
MODELS 440-448-445 MAINTENANCE INSTRUCTIONS for APRILAIRE HUMIDIFIER MODEL 440 CAUTION! Sudden operation may cause personal injury or property damage. Turn humidistat to “off” or lowest setting before servicing. 1. Note humidistat setting and turn dial to the “ Off ” position.
A. TO CLEAN RESERVOIR 1. Hold bottom of reservoir (IT IS FILLED WITH WATER) and loosen retainer knob. Carefully lower reservoir, disengaging from metal frame. 2. Empty water, remove partition and reservoir liner. 3. Clean or replace reservoir liner. Reinstall partition in liner.
- 13- 1. Disconnect electrical power and turn off water supply. 2. Remove screws of the inlet grille (1). The grille can now be removed from the metal housing (8). 3. Lift the complete plastic framed evaporative section out of the humidifier housing. 4.
- 14 - MODELS 110-112 1. Disconnect electrical power and turn off water supply. 2. Disconnect: a) 120 volt electrical service. b) Copper water supply line (1) & feed tube (2). c) Drain line. d) 24 volt leads. 3. Turn two swing locks (3), one at either side of lower housing off humidifier flange.
- 15 - MODEL 220-224 1. Turn off water supply and turn down humidistat. 2. Remove three “ Z ” clips (1) that hold top half of unit to furnace plenum. 3. Slide off four closure clips (2 & 3) that hold two halves of unit together. 4. Loosen compression fitting (4) on copper feed tube (6) and remove.
- 16 - LIMITED WARRANTY Your Research Products Corporation Aprilaire ® Humidifier unit is expressly warranted for one (1) year from date of instal- lation to be free from defects except, however, for the disposable water panel which will have to be replaced from time to time depending upon the amount of use.
The Aprilaire ® Indoor Air Comfort System is an integrated group of air quality enhancement products designed to work with your heating and cooling system to make your home more comfortable. For the best in indoor air quality, ask your heating and cooling contractor about these fine Aprilaire products, or visit us at www .
SERVICE AND WA TER P ANEL REPLACEMENT RECORD Date Dealer Name DP #10003882 5.9.00 Printed in U.S.A. P.O. BOX 1467 • MADISON, WI 53701-1467 Products For Better Indoor Air Quality ™.
An important point after buying a device Aprilaire 445 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Aprilaire 445 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Aprilaire 445 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Aprilaire 445 you will learn all the available features of the product, as well as information on its operation. The information that you get Aprilaire 445 will certainly help you make a decision on the purchase.
If you already are a holder of Aprilaire 445, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Aprilaire 445.
However, one of the most important roles played by the user manual is to help in solving problems with Aprilaire 445. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Aprilaire 445 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
