Aprilaire 1700 House Size, Square feet, Based on Ashrae 62.2 ventilation requirement

VENTILATION / FAN CYCLING SETTINGS (CONTINUED)

This installed option allows outside air to be combined with the fan cycling feature from the dehumidifier, provided the outside air temperature is in the acceptable range (0-100°F). Note: The dehumidifier can control the HVAC fan to provide fan cycling, regardless of whether or not an outdoor ventilation duct is installed.

•An Aprilaire® Normally-Closed Damper (Model 6506) should be installed in the outside air intake. It should be wired to the terminals labeled “VENT DAMPER” on the dehumidifier control board. Follow all installation instructions supplied with the damper. Refer to each installation for ducting.

•The Outdoor Temperature Sensor (Model 4278) should be installed outside in a shaded location (Figure 16) or in an outside air intake duct, but no more than 3 feet from the outside (Figure 17).

•The Outdoor Temperature Sensor is not affected by wire length. However, do not route the wire alongside wires carrying high voltage (115 VAC or greater), as interference may occur.

FIGURE 16	NORTH, EAST
	OR WEST SIDE	OUTDOOR
	OF HOME	TEMPERATURE
		SENSOR
		SENSOR
		SENSOR
OUTDOOR		BRACKET
	ABOVE EXPECTED
TEMPERATURE SENSOR
LEADS	SNOW LINE

B2202617-D

FIGURE 17

CENTER LINE

36" MAX.

OUTSIDE WALL

B2202617-E

•Connect the wires from the sensor to the terminals labeled “ODT SENSOR” on the dehumidifier. See Figure 12 for terminal locations.

VENTILATION GUIDELINES

TABLE 1 – Air Cycling Time Setting (min./hr.)

House Size		Bedrooms
(square feet)	2	3	4	5
1000-1500	20	25	30	35
1501-2000	25	30	30	35
2001-2500	25	30	35	40
2501-3000	30	35	40	40
3001-3500	30	35	40	45

1.Based on ASHRAE 62.2 ventilation requirement.

2.Based on outside air duct of 6” dia., 20’ long flex duct, 0.15” w.c. static pressure at outdoor air duct.

3.Based on ‘Cycle Period’ being in the default (1 hour) position.

4.A longer outside air duct and/or lower static pressure will require a longer Ventilation Time.

As an example, for a 2,500 square foot home with 3 bedrooms, set the cycle time to 30 minutes of ventilation per one-hour cycle.

A longer outdoor air intake duct or lower return static pressure will increase the ventilation time required. Additionally, local codes may affect the setting.

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