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VENTILATION / FAN CYCLING SETTINGS (CONTINUED)
• 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.
• Connect the wires from the sensor to the terminals labeled “ODT SENSOR” on the dehumidifier.
See Figure 12 for terminal locations.
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.
NORTH, EAST
OR WEST SIDE
OF HOME
OUTDOOR
TEMPERATURE
SENSOR
SENSOR
SENSOR
BRACKET
ABOVE EXPECTED
SNOW LINE
OUTDOOR
TEMPERATURE SENSOR
LEADS
36" MAX.
CENTER LINE
OUTSIDE WALL
B2202617-D
B2202617-E
FIGURE 16
FIGURE 17
House Size
Bedrooms
(square feet)
2345
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
TABLE 1 – Air Cycling Time Setting (min./hr.)
VENTILATION GUIDELINES
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.