Aprilaire Model 8120A & 8126A Digital Ventilation Controller
Owner's Manual
Includes Safety & Operating Instructions and Warranty Information
READ AND SAVE THESE INSTRUCTIONS
Principles of Operation
Modern homes often use "Green" techniques and energy-saving systems that reduce utility bills but can limit fresh air introduction. Without ventilation, stale air, and contaminants from cleaning, painting, and attached garages can persist indoors for extended periods.
Your Aprilaire ventilation controller introduces fresh air and circulates it throughout your home continuously to combat the effects of trapped stale air. The ventilation rate is determined by your home's size and the number of occupants. This controller provides a reliable method for automatically supplying fresh air.
The controller monitors indoor humidity and outdoor temperature, operating based on timer settings adjusted to your preferences, local codes, or ASHRAE 62.2-2010 guidelines. It prevents outside air intake if it would significantly increase indoor humidity. The controller has an upper humidity limit of 55% RH when the outdoor temperature is above 50°F. It can also prevent ventilation in extreme high or low temperatures. Consult your installing contractor to enable or disable these limits.
Note: Ventilation will not occur if the air inlet is clogged with debris. Regular cleaning is required.
Setting Instructions
The ventilation controller is installed in the return duct of your furnace or heat pump. The primary user-adjustable setting is the ventilation time per hour. For example, setting the knob to 20 minutes results in 20 minutes of ventilation each hour. Ventilation occurs during heating and cooling cycles. If the heating or cooling system does not initiate ventilation, the controller will activate the furnace blower to provide the set ventilation time.
Dial Description
The dial is marked in 10-minute increments but can be set to any estimated value within a 5-minute accuracy. Your installer likely pre-set this according to your home's size and occupant count. If you wish to adjust it, turn the knob a maximum of 5 minutes in either direction. Allow the new setting to operate for 24 hours before making further adjustments.
The dial features markings for: OFF, 10, 20, 30, 40, 50, 60 Minutes Per Hour.
Test/Reset Function
The TEST/RESET setting is used to verify proper installation. Activating this setting runs the controller for 1 minute. Do not leave the knob in the TEST/RESET position.
Limited Warranty
Research Products Corporation warrants the Aprilaire® Digital Ventilation Controller for five (5) years from the installation date against defects in materials or workmanship.
Research Products Corporation's sole obligation under this warranty is to provide a replacement Controller, free of charge, if found defective within the five-year period. The defective Controller must be returned within thirty (30) days after the five-year period expires, either to your original supplier or to Research Products Corporation, Madison, Wisconsin 53701, along with the installation date.
This warranty does not cover labor costs for Research Products Corporation. It also does not apply to defects in workmanship or materials supplied by your installer, only to defects in the Controller itself.
Implied warranties of merchantability or fitness for a particular purpose are limited to the duration of the five-year period. Research Products Corporation expressly excludes liability for incidental or consequential damages, except for personal injuries, arising from any breach of implied warranties or this limited warranty.
This limited warranty is void if defects result from improper installation by anyone other than a qualified heating and air conditioning contractor. If the warranty is voided due to failure to use a qualified contractor, all disclaimers of implied warranties become effective upon installation.
Some states do not permit limitations on the duration of implied warranties or the exclusion/limitation of incidental or consequential damages, so these limitations may not apply to you. This warranty grants specific legal rights, and you may have other rights that vary by state.
Warranty Registration
Register your Aprilaire product online at www.aprilaire.com. If you cannot register online, mail a postcard with your name, address, phone number, product purchased, and date of purchase to: Research Products Corporation, P.O. BOX 1467, Madison, WI 53701.
Your warranty registration information will not be sold or shared outside of Research Products Corporation.
