Dehumidifier Sequence of Operation

IF THE DEHUMIDIFIER IS NOT WIRED TO THE HVAC EQUIPMENT, THE DEHUMIDIFIER WILL SAMPLE AT THE END OF THE CYCLE PERIOD.

With 3 minutes left in the Cycle Period, the dehumidifier will turn on the dehumidifier blower for 2 minutes. During this time the temperature and relative humidity are measured and the dewpoint is calculated. If the dewpoint is higher than the setting at the Control Knob then the dehumidifier compressor will turn on and the dehumidifier will run until it reaches set point.

After reaching the set point, the dehumidifier will not sample again until the end of the next Sample Period.

For example, if the Sample Period is set for 1 hour, the dehumidifier will sample at the end of the hour. Once the dehumidifier reaches set point and shuts off, the dehumidifier will not sample again until the end of the next hour.

IF THE DEHUMIDIFIER IS WIRED INTO THE HVAC EQUIPMENT, THE DEHUMIDIFIER WILL SAMPLE THE FIRST TIME THE HVAC EQUIPMENT RUNS IN THE CYCLE PERIOD OR AT THE END OF THE CYCLE PERIOD IF THE HVAC EQUIPMENT DOES NOT RUN.

For example, if the Cycle Period is set to 1 hour and the air conditioner starts 15 minutes into that hour, the dehumidifier will sample when the air conditioner starts. Once the dehumidifier begins dehumidifying, it will run until set point is reached. If the dehumidifier samples and determines that dehumidification is not needed, it will not sample again until the next Cycle Period.

DAMPER SEQUENCE OF OPERATION

In the Whole House Convertible to Localized installation 4 motorized dampers are used to control the air flow through the dehumidifier. The dampers are energized when the HVAC equipment is running. This means that when the HVAC equipment is running, the dampers are in the Whole-House position. When the HVAC equipment is not running, the dampers are in the local position.

VENTILATION OR FAN CYCLING SEQUENCE OF OPERATION

If the dehumidifier is providing outdoor air ventilation or fan cycling, it is monitoring the HVAC equipment to provide the amount of HVAC fan run time that has been set by the Cycle Time during the Cycle Period.

If an outdoor air damper has not been installed then the dehumidifier is providing fan cycling. The dehumidifier will monitor the HVAC system and if the system has not run for the specified Cycle Time within the Cycle Period, the dehumidifier will energize the HVAC fan through the G terminal to provide the desired amount of fan run time.

For example, if the Cycle Time is set for 10 minutes and the Cycle Period is set for 1 hour then the dehumidifier will provide

10 minutes of fan cycling or outdoor air ventilation. If the HVAC system runs for 5 minutes during this hour then the dehumidifier will energize the fan for an additional 5 minutes.

If an outdoor air damper has been installed, then the Model 1700 is providing outdoor air ventilation. The 1700 will open the outdoor air damper whenever the HVAC system is running, up to the amount of time specified by the Cycle Time. The dehumidifier will energize the HVAC fan and open the outdoor air damper to provide the desired ventilation time if the HVAC system has not run for the specified Cycle Time.

If an Outdoor Temperature Sensor has been installed, then the dehumidifier will use the outdoor temperature to determine if the outdoor air damper is to be opened. If the outdoor temperature is above 100°F the damper will not open. If the temperature is between 20°F and 0°F the damper will only open with a heat call. If the outdoor temperature is below 0°F, the damper will not open. If the Outdoor Temperature Sensor is not installed then the temperature is not considered in opening the damper.

10006238	5.05
B2203431C	P.O. BOX 1467 • MADISON, WI 53701-1467 • PHONE: 800/334-6011 • FAX: 608/257-4357 • www.aprilairecontractor.com

1700 specifications

The Aprilaire 1700 is a high-performance dehumidifier designed to effectively control humidity levels in residential and commercial spaces. This unit is particularly suitable for larger areas, with the capability to remove up to 70 pints of moisture per day, making it an ideal choice for basements, crawl spaces, and other large rooms prone to excess humidity.

One of the standout features of the Aprilaire 1700 is its durable construction. Built with robust materials, this dehumidifier is designed to withstand the rigors of continuous operation, ensuring longevity and reliable performance over time. Its compact design allows for easy installation, even in tight spaces, further enhancing its versatility.

The Aprilaire 1700 utilizes advanced dehumidification technology, featuring a 2-stage filtration system that not only removes moisture but also captures airborne allergens like dust and pollen. This makes the air in the home healthier and more comfortable for occupants, especially those with allergies or respiratory issues.

Another key characteristic of the Aprilaire 1700 is its built-in hygrometer, which allows for precise monitoring of humidity levels. The unit automatically adjusts its operation based on real-time humidity readings, ensuring optimal performance and energy efficiency. This smart technology helps in maintaining consistent humidity levels, preventing problems associated with excess moisture, such as mold growth and structural damage.

The unit can be integrated seamlessly with existing HVAC systems, allowing it to work in conjunction with your home’s heating and cooling systems for enhanced climate control. This integration also ensures quieter operation compared to portable dehumidifiers, making the Aprilaire 1700 an unobtrusive option for whole-home humidity management.

User-friendly controls on the unit allow for easy adjustments, enabling homeowners to set their desired humidity levels with ease. Additionally, the Aprilaire 1700 is designed for minimal maintenance, featuring a washable filter that can be cleaned and reused, contributing to cost savings over time.

In conclusion, the Aprilaire 1700 is a powerful and efficient solution for managing indoor humidity levels. With its robust construction, advanced technologies, and user-friendly features, it offers both comfort and peace of mind for homeowners looking to protect their living spaces from the negative effects of excess moisture. By investing in an Aprilaire 1700, users can enjoy a healthier indoor environment year-round.