Ventilation / FAN Cycling Settings

The Aprilaire Dehumidifier has the option to monitor HVAC heating, cooling and fan calls to assure the HVAC fan has operated a predetermined amount of time each 1/2, 1, 2 or 3 hours. The dehumidifier can also open a normally closed damper in an outdoor air intake to ventilate during this predetermined amount of time. This feature will function even if the dehumidifier is turned off at the dehumidifier or Model 70 Living Space Control. The only way to disable this feature is by turning the Cycle Time setting to OFF or turning power off at the On/Off switch.

FIGURE 12	OPTIONAL		DEHUMIDIFIER
FIGURE 12	VENTILATION	24 VAC
	VENTILATION
	DAMPER			CONTROL
	DAMPER	(10 VA min)		CONTROL
		(10 VA min)
		TRANSFORMER			VENT DEH
				DAMPERS	VENT DEH
THERMOSTAT	HVAC EQUIPMENT
R		R			Rf
C		C		HVAC	Cf
C		C
G		WIRE NUT			Gs
G

		G		EQUIP.	Gh W
W		W		EQUIP.	Gh W
W		W
Y		Y			Y
Y		Y
				SWITCH	FLOAT
OPTIONAL OUTDOOR				SENSOR	ODT
TEMPERATURE SENSOR				SENSOR	ODT
(Model 8052)
					A
				REMOTE	B +
					-
90-968

First, set the 1/2, 1, 2 or 3 hour period by setting the CYCLE PERIOD dip switches to determine how often the dehumidifier should look to ventilate or cycle the HVAC fan.

Next, use the CYCLE TIME dial to determine how long during every cycle period the HVAC fan should operate. Adjust the dial from OFF to between 1 to 60 minutes. This will give you HVAC fan operation from 1 to 60 minutes every 1/2, 1, 2 or 3 hours. A call for heat, cooling or fan from the HVAC equipment will often satisfy the run time requirement. If not, the dehumidifier will turn on the HVAC fan to assure that the cycle time is met. For example: If the home requires ventilation of 20 minutes every two hours set the CYCLE PERIOD Dip Switch for 2 hours to ON and rotate the CYCLE TIME to 20 minutes. If the HVAC equipment only has to run for 10 minutes, the dehumidifier will turn on the HVAC fan for 10 minutes at the end of the 2 hours to assure the ventilation / fan cycling time.

Finally, if using the Ventilation Damper, determine if the ventilation should be restricted based on outdoor temperature. Set the VENT-AUTO / VENT-TIMED dip switch to VENT-AUTO

(see Figure 15) to prevent opening the ventilation damper if the outdoor air is above 100°F, below 0°F or except with a heat call between 20°F and 0°F. In the VENT-TIMED setting the ventilation damper is activated regardless of outdoor conditions. Note: The Outdoor Temperature Sensor (Model 8052) must be installed for this to work.

You can also check the wiring of the dehumidifier to the HVAC equipment. If you rotate the CYCLE TIME dial to TEST, the HVAC fan should come on and the Ventilation Damper

(if equipped) should open. DO NOT leave the CYCLE TIME in TEST.

FIGURE 13			(shown set
FIGURE 13			to 1 hour)
CYCLE PERIOD
	1	ON	30 MIN.
	2	ON	1 HOUR
	2		1 HOUR
	3		2 HOUR
	3		2 HOUR
	4		3 HOUR

90-783C

FIGURE 14			(shown set to
FIGURE 14			30 minutes)
30
0		MIN.	60
0			60
	MIN			MIN.

	OFF			TEST
	OFF			TEST

CYCLE TIME

90-783C

FIGURE 15

SYSTEM SETUP

OFF				ON
MODEL 70	1	ON	MODEL 70
HVAC FAN	2		HVAC FAN
HVAC FAN	2		HVAC FAN

WHL HOUSE	3		CONVERTIBLE
VENT-AUTO	4		VENT-TIMED
			90-969
			90-969

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.