Aprilaire 8120 Safety & Installation Instructions
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Aprilaire 8120 Safety & Installation Instructions

Digital ventilation controller
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See also: Owner's Manual
Model 8120A & 8126A
Digital Ventilation Controller
Safety &
Installation
Instructions
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Summary of Contents for Aprilaire 8120

  • Page 1 Model 8120A & 8126A Digital Ventilation Controller Safety & Installation Instructions READ AND SAVE THESE INSTRUCTIONS...

  • Page 2: Table Of Contents

    TAblE Of CONTENTS SAfETY INSTRUCTIONS Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 DANGER Specifications .

  • Page 3: Specifications

    SPECIfICATIONS OVERVIEW MOUNTING lOCATION The controller must be installed in the return duct, at least 6 inches upstream of the fresh air intake opening, the The ventilation controller will bring in fresh air Operating temperature range 20-160°F humidifier if present, and/or the humidifier bypass duct opening (see figures 1 & 2) . and activate the HVAC fan to cycle the fresh air throughout the home .

  • Page 4: Mounting Controller

    MOUNTING lOCATION MOUNTING CONTROllER fIGURE 2 – Typical basement Installation DISASSEMblE THE CONTROllER MOUNT CONTROllER TO DUCT Remove the knob . Remove the cover by pulling at the After the location of the controller is selected, drill a RETURN DUCT SUPPLY DUCT bottom and swinging out and up .
  • Page 5 18" above ground level, whichever is greater. Note: Controller Replacement – When replacing an 8120 with an 8120A, the duct opening left by the removed controller must be covered completely . Locate and install the new controller as instructed above .

  • Page 6: Ductwork & Damper Installation

    Disconnect power to HVAC equipment. Make wire connections as shown in figure 6 . DAMPER INSTAllATION fIGURE 4 – Aprilaire Damper • Wire the 24VAC transformer (provided with Model 8126A only). The transformer should be continuously energized, Step 1: Install damper with crimped end downstream .

  • Page 7: Mode Selection

    WIRING MODE SElECTION If selecting a mode with temperature limits This controller is equipped with 4 mode settings . The “A” mode allows the controller ventilate based on time only . fIGURE 7 – ODT Mounted Outside (B, C or D), the outdoor temperature sensor must The “B”, C”, and “D”...

  • Page 8: Determine Ventilation Requirements

    MODE SElECTION DETERMINE VENTIlATION REQUIREMENTS CAlCUlATE VENTIlATION TIME REQUIREMENTS AND SElECT VENTIlATION TIME SETTING Position Description Chart Timer controlled TAblE 1 – Ventilation Air Requirements, CfM ventilation with 100° (Cold Climate) VENTILATION humidity and PREVENTED Number of bedrooms Home Size (ft temperature limits 50°...

  • Page 9: Setting Ventilation Time

    DETERMINE VENTIlATION REQUIREMENTS SETTING VENTIlATION TIME 2. Determine the ventilation controller fresh air delivery rate. 3. Determine the ventilation controller knob setting. TAblE 2 – CfM Delivered TAblE 3 – Cycle Time Setting (minutes) for Airflow Delivered vs. Airflow Required for 1 Hour Cycle Negative Static Pressure (“w.c.) as Measured for Return Duct or Plenum CfM Required Duct...

  • Page 10: System Checkout

    SYSTEM CHECKOUT TROUblESHOOTING 1 . Turn the time setting knob to the TEST/RESET position . If the installation is correct the HVAC blower will turn on Technical support is available Monday through Friday, 7:00 a .m . to 5:00 p .m . CST, at 800-334-6011 . Use the (independent of heat or cooling operation) and the damper will open for 1 minute unless the knob is turned off of troubleshooting guide to identify and correct system faults .
  • Page 11 TROUblESHOOTING TROUblESHOOTING TAblE 4 – Troubleshooting Guide (continued) TAblE 5 – Error Codes Symptom Troubleshooting Procedure Displayed Error Code Troubleshooting Procedure The damper does not open 1 . The damper will not operate once the ventilation time interval has been met . Display Error Code: E1: Rotate knob to the “Test/Reset”...
  • Page 13 P.O. Box 1467 • Madison, WI 53701-1467 • Phone: 800/334-6011 • Fax: 608/257-4357 www.aprilairepartners.com 10010003 11 .12 B2205858A © 2012 Aprilaire – A division of Research products Corporation...

This manual is also suitable for:

8126a

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