Installation Manual

Getting Started ....................................page 3

Installation .......................................page 7

System Checkout .................................page 19

Troubleshooting Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 21

TABLE OF CONTENTS

THESE INSTALLATION INSTRUCTIONS

ARE FOR THE APRILAIRE

AUTOMATIC DIGITAL

HUMIDIFIER CONTROL ONLY!

For Aprilaire

humidifier installation,

follow Aprilaire Humidifier Installation Instructions.

WARNING

High voltage can cause serious injury.

Disconnect electrical power to the furnace and humidifier

before starting installation.

Sharp edges.

Wear gloves and use care when cutting plenum openings

and handling ductwork.

CAUTION

Condensation damage may occur.

Do not set humidifier control higher than recommended.

Lower the humidity setting if there is excess condensation

on the inside of any windows in unheated living spaces.

Install according to the enclosed installation instructions.

Controller damage or malfunction may occur

if installation instructions are not followed.

Install humidifier control on return plenum only.

Install humidifier control upstream of the bypass outlet or

steam dispersion tube.

Do not install humidifier control facing downward.

GETTING STARTED

STEP 1: Unpack the Humidifier Control Carton

Make sure all components are present (see Figure A):

A. Humidifier control

B. Outdoor temperature sensor

C. Manual mode label

Figure A

90-1201B