11
VENTILATION / AIR 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 8052) 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 wall (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.
B. 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).
This will allow the homeowner to receive the proper
ventilation year round.
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
O
F HOME
OUTDOOR
TEMPERATURE
SENSOR
SENSOR
SENSOR
BRACKET
ABOVE EXPECTED
SNOW LINE
O
UTDOOR
TEMPERATURE SENSOR
LEADS
36" MAX.
CENTER LINE
OUTSIDE WALL
B2202617-D
B2202617-E
FIGURE 16
FIGURE 17
STEP 1: CALCULATE THE VENTILATION REQUIREMENT
A. The MINIMUM ventilation requirement is calculated using ASHRAE 62.2-2007.
ASHRAE Airflow In CFM = [House Area in Sq Ft x 0.01] + [No. Bedrooms +1 x 7.5]
Use the Number of Bedrooms (Plus 1) or the Number of Occupants, Whichever Is Larger
B. Table 1 shows calculated airflow values
at the nearest 5 CFM.
HOUSE
SQ FT
TABLE 1 – Minimum CFM Per Number Bedrooms
2 3 4 5 6
1000 35 40 50 - - - - - -
1500 40 45 55 60 70
2000 45 50 60 65 75
2500 50 55 65 70 80
3000 55 60 70 75 85
3500 - - - - - - 75 80 90
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