Ctk0* Wiring; Ossil Uel Pplications - Goodman *CVC96 Installation Instructions Manual

and transmits the demand along with a fan request to the indoor
unit. The indoor unit then sends the demand to the ECM motor.
The table below lists the various ComfortNet systems, the operat-
ing mode, and airflow demand source.
For example, assume the system is an air conditioner matched
with a furnace. With a call for low stage cooling, the air condi-
tioner will calculate the system's low stage cooling airflow de-
mand. The air conditioner will then send a fan request along with
the low stage cooling airflow demand to the furnace. Once re-
ceived, the furnace will send the low stage cooling airflow demand
to the ECM motor. The ECM motor then delivers the low stage
cooling airflow. See the applicable ComfortNet air conditioner or
heat pump installation manual for the airflow delivered during
cooling or heat pump heating.
In continuous fan mode, the CTK0* thermostat provides the air-
flow demand. The thermostat may be configured for a low, me-
dium, or high continuous fan speed. The low, medium, and high
fan speeds correspond to 25%, 50%, and 75%, respectively, of the
furnaces' maximum airflow capability. During continuous fan op-
eration, the thermostat sends a fan request along with the con-
tinuous fan demand to the furnace. The furnace, in turn, sends
the demand to the ECM motor. The ECM motor delivers the re-
quested continuous fan airflow.
F F A
OSSIL UEL PPLICATIONS
This furnace can be used in conjunction with a ComfortNet compatible heat pump in a fossil fuel application. A fossil fuel application
refers to a combined gas furnace and heat pump installation which uses an outdoor temperature sensor to determine the most cost
efficient means of heating (heat pump or gas furnace). When used with the CTK0* thermostat, the furnace/heat pump system
is automatically configured as a fossil fuel system. The balance point temperature may be adjusted via the CTK0* thermo-
stat advanced user menus (see CTK0* instructions for additional information).
CTK0* W
IRING
NOTE: A removable plug connector is provided with the control to make thermostat wire connections. This plug may be removed,
wire connections made to the plug, and replaced. It is STRONGLY recommended that you do not connect multiple wires into a
single terminal. Wire nuts are recommended to ensure one 18 AWG wire is used for each terminal. Failure to do so may result
in intermittent operation.
Typical 18 AWG thermostat wire may be used to wire the system components. One hundred (100) feet is the maximum length of wire
between indoor unit and outdoor unit, or between indoor unit and thermostat. Wire runs over (100) feet require larger gauge
wire.
F -W I O
OUR IRE NDOOR AND
Typical ComfortNet wiring will consist of four wires between the
indoor unit and outdoor unit and between the indoor unit and ther-
mostat. The required wires are: (a) data lines, 1 and 2; (b) ther-
mostat "R" (24 VAC hot) and "C" (24 VAC common).
T -W O , F
WO IRE UTDOOR OUR
Two wires can be utilized between the indoor and outdoor units.
For this wiring scheme, only the data lines, 1 and 2, are needed
between the indoor and outdoor units. A 40VA, 208/230 VAC to
24VAC transformer must be installed in the outdoor unit to pro-
vide 24VAC power to the outdoor unit's electronic control. See instruction manual provided with the thermostat for wiring
instructions.
W
UTDOOR IRING
-W I W
IRE NDOOR IRING
System
Air Conditioner +
Furnace
Heat Pump +
Furnace
Furnace + Non-
Comm 1stg Air
Conditioner
1 2
1 2
1 2
System Wiring using Four-Wires
42
System Airflow Dem and
Operating M ode Source
Cooling Air Conditioner
Heating Furnace
Continuous Fan Thermostat
Cooling Heat Pump
Heat Pump Heating
Heat Pump
Only
Auxiliary Heating Furnace
Continuous Fan Thermostat
Cooling Furnace
Heating Furnace
Continuous Fan Thermostat
CTK0*
Thermostat
R C
ComfortNet Compatible Furnace
R C
Integrated Control Module
ComfortNet Compatible AC/HP
R C
Integrated Control Module
Figure 53