Aprilaire 1700 Safety And Installation Instructions Manual page 11

OPTIONAL VENTILATION – DAMPER AND OUTDOOR TEMPERATURE SENSOR
This installed option allows outside air to be combined with the
air cycling feature from the dehumidifier, provided the outside air
temperature is in the acceptable range. Note: The dehumidifier
can control the HVAC blower to provide air cycling, regardless of
whether or not an outdoor ventilation duct is installed.
• The Aprilaire ® Normally-Closed Damper (Model 6506) needs to
be installed in the outside air intake. It should be wired to the
terminals labeled "VENT DAMPER" on the dehumidifier control
board.
• In addition to these instructions, follow all installation
instructions supplied with the damper.
• The Outdoor Temperature Sensor (Model 4278) can be installed
outside in a shaded location (Figure 11) or in an outside air
intake duct, but no more than 3 feet from the outside (Figure 12).
• 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 into the terminals labeled
"ODT SENSOR" on the dehumidifier. See Figure 10 for terminal locations.
VENTILATION GUIDELINES
Air Cycling Time Setting (min./hr.)
House Size
(square feet)
1000-1500
1501-2000
2001-2500
2501-3000
3001-3500
As an example, for a 2,500 square foot home with 3 bedrooms, set the cycle time to 25 minutes of ventilation per one-hour
cycle.
A longer fresh air intake duct or lower return static pressure will increase the ventilation time required. Additionally, local
codes may affect the setting.
See CONTROL AND SETUP (page 12) for setting up the cycle period and cycle time.
INSTALL AND WIRE POWERED BACKFLOW DAMPER
• If the Aprilaire ® Normally-Closed Damper (Model 6508) needs to be installed in the dehumidifier outlet, it should be wired
to the terminals labeled "DEH DAMPER" of the dehumidifier. In addition to these instructions, follow all installation
instructions supplied with the damper.
Bedrooms
2 3
15 20 25
20 25 25
20 25 30
25 30 30
25 30 35
FIGURE 11
Notes:
1. Based on ASHRAE 62.2 ventilation
4 5
2. Based on outside air duct of 6" dia., 20' long
25
30
3. Based on 'Cycle Period' being in the default
30
35
4. A longer outside air duct and/or lower static
40
requirement.
flex duct, 0.08 in. w.c. static pressure at fresh
air duct.
(1 hour) position.
pressure will require a longer Ventilation Time.
B2202617-D
FIGURE 12
B2202617-E
11