The Aprilaire® Ventilation Controller, manufactured by Research Products Corporation, is covered by a five-year warranty. The controller is guaranteed to be free from defects in materials and workmanship. If any defects are found within the five-year period, the controller can be returned to the original supplier or Research Products Corporation for replacement within 30 days. This warranty does not cover defects in materials or workmanship provided by the installer. The implied warranties of merchantability or fitness for a particular purpose are limited to the aforementioned five-year period. Research Products Corporation expressly excludes liability for incidental or consequential damages resulting from any breach of the implied warranties or the limited warranty.
The Aprilaire Model 8120 Ventilation Controller is an intelligent device designed to provide fresh air to a home by working in conjunction with an Aprilaire Damper. It monitors indoor relative humidity, outdoor temperature, and user-adjustable timer settings to determine when and how long to ventilate. The controller prevents indoor humidity from increasing beyond 60% and restricts operation when outdoor temperatures are below 0°F or above 100°F.
The document outlines operating instructions for setting the cycle time interval via a 5-pin header jumper (options: 1, 2, 3, or 4 hours) and adjusting the ventilation time within the cycle using an exterior knob. It also details the control limits based on outdoor temperature and indoor humidity, explaining how the controller operates in different sections of its operating chart.
| Indoor Humidity Limit | 60% |
|---|---|
| Outdoor Temperature Limit High | 100°F |
| Humidity Ventilation Limit | 55% |
| Warranty Period | 5 years |
| Voltage | 120 volts |
The motorized normally-closed damper to the outside will not be opened.
The cycle time interval is determined by moving a jumper on a 5 pin header to the desired setting of 1, 2, 3, or 4 hours.