AIR FLOW
FILTER
FURNACE/AIR
HANDLER
FRESH AIR
INTAKE HOOD
w/ SCREEN
FRESH AIR INTAKE DUCT
FRESH AI
R
GABLE END WALL, BAND JOIST, OR PORCH SOFFIT
DEHUM
VENTILATOR
RETURN
MIXING BOX
10” DIA. DUCT
AIR FLOW
MODEL 6506
NORMALLY CLOSED DAMPER
10x6 ROUND TRANSITION
+ - A B ODT VENT DEH
Sensor Dampers
Remote
FLOA
T
Switch
DH
DH
Gh
Rf
Cf
Gs
Y
W
HV
AC EQUI
P.
G
R
C
W
Y
R
C
G
W
Y
HVAC
EQUIPMENT THERMOSTAT
OPTIONAL
24 VAC
(10 VA min)
TRANSFORMER
6” NORMALLY
CLOSED DAMPER
OPTIONAL
EXTERNAL
VENTILATION
CONTROL
DUCTING AND WIRING
Install ducting as shown in
Figure 7
.
A 6” diameter intake duct is usually
sufficient, but a larger intake duct, or
multiple 6” intake ducts can be used
if added ventilation flow is needed .
A normally closed damper like the
Aprilaire Model 6506 needs to be
installed in the intake duct to comply
with Energy Star Certified Homes
requirements .
Wire the control to the HVAC system as show in
Figure 8
.
Wiring to the HVAC system allows the ventilator to turn on
when the HVAC system is running for improved circulation
of the outdoor air, and to take advantage of the latent
capacity of the air conditioning .
The ventilation output of a thermostat can wired to the
DH terminals of the Model 8191 or 8192 to put control of
ventilation in the living space . Aprilaire thermostat models
with a ventilation output include: 8840M, 8840, 8920W,
8830, 8910W, 8910, 8820, 8620W and 8620 . Note that
an outdoor temperature sensor (included with all models)
must be wired to the thermostat to take full advantage of
all ventilation features .
Wiring to the Rf terminal of the ventilator is optional .
Wiring as shown allows the fresh air brought in by the
ventilator to be distributed to the entire home by the HVAC
system fan when it would not be otherwise running .
FIGURE 7 – Ducting the Ventilator
FIGURE 8 – Wiring the Ventilator
90-1983
90-1985
DUCTING
WIRING
7
