WIRING TO EXTERNAL CONTROLS
If the ventilator is to run continuously, then no additional wiring is required – go to
Test and Setting
section on page 9.
The ventilator can run intermittently with a ventilation controller.
N
L
120 V
AC
CON3
CON2
CON1
8144NC CIRCUIT BOARD
MODEL 8620/8620W THERMOSTAT
C
I2
I1
Y
O/B
RC R
G
Y2
W2
L
T2
T1
S1
S2
W
N
L
120 V
AC
CON3
CON2
CON1
8144NC CIRCUIT BOARD
MODEL 8120X DIGITAL VENTILATION CONTROL
R
C
Y
W
O
Gs
Gh
VENT
ODT
FIGURE 10
– WIRING TO 8620/8620W THERMOSTAT
FIGURE 11
– WIRING TO 8120X
DIGITAL VENTILATION CONTROL
N
L
120 V
AC
CON3
CON2
CON1
8144NC CIRCUIT BOARD AS SHIPPED
PRE-INSTALLED
JUMPER
N
L
120 V
AC
CON3
CON2
CON1
8144NC CIRCUIT BOARD
CONTROL MODULE OF IAQ CONTROL
FIGURE 8
– CONTROL WIRING JUMPER
FIGURE 9
– WIRING TO 8910/8910W/8920W IAQ CONTROL
1.
Disconnect electrical service to
the ventilator at the fuse or circuit
breaker that feeds the circuit to
which the ventilator is wired.
2.
Disconnect electrical service to the
HVAC system.
3.
Remove the motor speed
adjustment knob, the cover and
cover insulation, and the electrical
compartment cover (see Figure
4) to access the ventilator circuit
board.
4.
Cut the pre-installed jumper
wire in half and strip of 1/2" of
insulation off the end of each wire.
See
FIGURE 8
.
5.
Run external control wires through
the opening on the side of the
housing opposite where power
wiring was installed.
6.
Wire as shown for control selected.
The recommended controls are:
• Aprilaire IAQ Control Model
8910, 8910W or 8920W. See
FIGURE 9
.
• Aprilaire Thermostat Models
8620 or 8620W. See
FIGURE 10
.
• Aprilaire Model 8120X Digital
Ventilation Controller. See
FIGURE 11
.
7.
Restore power to the ventilator
and the HVAC system.
8
English
