VENTIlATION OR AIR CyClING
The dehumidifier has outputs available to open a normally closed damper,
introducing outdoor air through an outdoor air intake duct . See
figure 20a
for
standard ventilation ducting .
The dehumidifier can be used to pre-condition the ventilation air, removing
moisture before it is delivered to the home . This feature is only available in
single zone installations and when using the onboard control (no External or
Remote Control) . See
figure 20b
for pre-conditioned ventilation ducting . In this
configuration balancing dampers are used to ensure that the desired ventilation
airflow is brought into the home .
Note: The dip switches must be set for local
and Primary in this configuration.
Ventilation is controlled by the Cycle Period switches, Cycle Time potentiometer,
and Vent-Auto/Vent-Timed switches . If the ventilation damper is not installed, the
dehumidifier will function in Air Cycling mode, activating the HVAC blower to cycle
air through the home based on the Cycle Period and Cycle Time .
Required Components
Aprilaire Model 6506, 6” Normally Closed Damper
24 VAC Transformer (10VA min .) for Ventilation Damper
6” Insulated Duct and Fittings
18-22 AWG Wire
Intake Hood
Optional Component
8052 Outdoor Temperature Sensor
DUCTING & WIRING
fIGURE 20a – Single Zone, Whole-Home
with Ventilation
fIGURE 20b – Single Zone, Whole-Home
with Pre-Conditioned Ventilation
HVAC / FURNACE
DEHUMIDIFIER
DEHUMIDIFIED AIR IS SUPPLIED
DOWNSTREAM
FROM A-COIL TO
MINIMIZE EVAPORATION OFF A-COIL
AIR IS PULLED FROM
RETURN DUCT
NORMALLY CLOSED
VENT DAMPER
HVAC / FURNACE
DEHUMIDIFIER
DEHUMIDIFIED AIR IS SUPPLIED
DOWNSTREAM
FROM A-COIL TO
MINIMIZE EVAPORATION OFF A-COIL
AIR IS PULLED FROM
RETURN DUCT
AIR IS PULLED
FROM OUTSIDE
NORMALLY CLOSED
VENT DAMPER
BALANCING DAMPERS
90-1536
90-1536
Ducting Note:
Direct ducting the ventilation intake duct to the
dehumidifier inlet duct is acceptable if the incoming temperature
of the mixed air will be greater than 40°F and less than 140°F.
14
