Goodman ACVC96 BA Series Service And Troubleshooting page 30

SYSTEM OPERATION
BOARD TERMINAL
24 VAC
Thermostat
R
C
Optional
G
Optional
W
Y
D ehum
Optional if
feature
supported by
thermostat
Communicating Inverter
Air Conditioner or Heat Pump
Low Voltage Wiring - Non-Communicating
Outdoor Unit
When using the furnace with a single stage non-communicating
air conditioner or heat pump use the wiring methods shown.
When using a single stage air conditioner, the thermostat must
be setup for single stage heating and single stage cooling
mode. When using a single stage heat pump, the thermostat
must be setup for dual fuel operation where the reversing
valve is energized in cooling mode (see Non-Communicating
Single Stage Heat Pump wiring diagram). In both cases
airflow must be selected using the tonnage menu where
Airflow = (400 CFM) x (Selected Tonnage). Tonnage values
range from 1 to 6 in 0.1 increments.
NOTE: Airflow will not go above the system Max CFM. If the
tonnage value selected generates an airflow value above the
Max CFM, the system will cap this value and not provide any
more airflow than the Max CFM.
BOARD TERMINAL
CONNECTIONS
24 VAC
Thermostat
R
C
Optional
G
Optional
W
Y
D ehum
Optional
Non-Communicating Single Stage Heat
30
OUTDOOR
INDOOR
BOARD TERMINAL
CONNECTIONS
CONNECTIONS
1
1
2
2
R
R
C
C
R
C
G
W
Y
D ehum
Figure 38
INDOOR
1
This is the only
case where setting the
2
thermostat to heat pump
R
mode is acceptable.
C
Heat Pump
R
R
C
C
G
W
W
Y
Y
D ehum
Figure 39
Pump
BOARD TERMINAL
CONNECTIONS
24 VAC
Thermostat
R
C
Optional
G
Optional
W
Y
D ehum
Optional if
feature
supported by
thermostat
Non-Communicating Single Stage A/C
Dehumidification
The control board is equipped with a 24 volt dehum input in
the thermostat wiring connector to be used with a thermostat
or dehumidistat. Dehumidification mode allows the air
handler's circulator blower to operate at a slightly lower speed
(85% of calculated speed) during a combined thermostat
call for cooling and thermostat call for dehumidification or
dehumidistat call for dehumidification. This lower blower
speed enhances dehumidification of the conditioned air
as it passes through the AC coil. If using the dehum input
with a thermostat, configure the thermostat to energize this
terminal when dehumidification is desired. If using an external
dehumidistat, connect it between the R and Dehum terminals.
The dehumidistat must operate on 24 VAC and utilize a switch
which closes on humidity rise. Refer to the low voltage wiring
diagrams for additional wiring details.
Dehumidistat (close on humidity rise)
R
C
G
Y
D ehum
INDOOR
1
2
R
C
R Remote
Condensing Unit
(Single-Stage Cooling)
C
G C
Y
W
Y
D ehum
Figure 40
Dehumidistat
(close on humidity rise)
Figure 41