Appendix 3 - Model 8022: 4 Wire Thermostat To 3 Wire Cable Interface - Aprilaire 8800 System Installation Manual

APPENDIX 3 – MODEL 8022: 4 WIRE THERMOSTAT TO 3 WIRE CABLE INTERFACE
Any two thermostat equipment terminals (not 24V hot or common) can be combined with the diode pair and run to the 8022 through one wire,
avoiding the need to run an extra wire.
FIGURE 18
APRILAIRE THERMOSTAT
W1
Y1
G
R
RC
C
NOTE
The thermostat terminal connected to the W lead of the diode pair
must match the equipment terminal connected to the W terminal on
the EQUIP side of the 8022. The thermostat terminal connected to the
Y lead of the diode pair must match the equipment terminal connected
to the Y terminal on the EQUIP side of the 8022. R (24V hot) and X
(24V common) must be connected to the EQUIP side of the 8022,
all other equipment terminals may bypass the 8022.
18
SEE NOTE
SUPPLIED
WIRE NUT
Y
G
R
W
4 WIRE CONDUCTOR
5 TERMINAL THERMOSTAT
DO NOT REMOVE
SUPPLIED JUMPER
8022
STAT EQUIP
R
W
G
Y
K2
K1
SEE NOTE
R
G
Y
W
C
FURNACE
Y
BlK
R
G
W