Install Instructions

ManualsBrandsGoodman ManualsAir Handlers2 Ton, Multi-Position Variable Speed Air Handler

12RC

CTK0*AA

Thermostat

ComfortNet

Air Handler Integrated

Control Module

Compatible

ComfortNet

AC/HP Integrated

Control Module

Compatible

Optional

40VA Transformer

(included in

CTK0*AA kit)

208/230 VAC

24 VAC

12RC

System Wiring using Two-Wires between Air Handler and

AC/HP and Four-Wires between Air Handler and Thermostat

COMFORTNET™ SYSTEM ADVANCED FEATURES

Refer to the communicating thermostat installation manual

for information on accessing advanced features and menus.

DIAGNOSTICS

Accessing the air handler’s diagnostics menu provides ready

access to the last six faults detected by the air handler. Faults

are stored most recent to least recent. Any consecutively

repeated fault is stored a maximum of three times. Example:

A clogged return air filter causes the air handler’s motor to

repeatedly enter a limiting condition. The control will only

store this fault the first three consecutive times the fault oc-

curs. Navigate to the diagnostics menu as described above

in Accessing and Navigating the Advanced Features Menus.

NOTE: It is highly recommended that the fault history be

cleared when performing maintenance or servicing the air

handler.

NETWORK TROUBLESHOOTING

NOTE: Indoor Unit BIAS and TERMINATION Dipswitches

are factory set and should not be changed.

ONOFF

BIAS

TERM

Dipswitches - Indoor Unit BIAS and TERMINATION

The ComfortNet system is a fully communicating system,

and thus, constitutes a network. Occasionally the need to

troubleshoot the network may arise. The integrated air han-

dler control has some on-board tools that may be used to

troubleshoot the network. These tools are: red communica-

tions LED, green receive (Rx) LED, and learn button. Refer

to the Communications Troubleshooting Chart at the end of

this manual for error codes, possible causes and corrective

actions

• Red communications LED – Indicates the status of

the network. The table below indicates the LED sta-

tus and the corresponding potential problem.

• Green receive LED – Indicates network traffic. The

table below indicates the LED status and the corre-

sponding potential problem.

• Learn button – Used to reset the network. Depress

the button for approximately 2 seconds to reset the

network.

SYSTEM TROUBLESHOOTING

NOTE: Refer to the instructions accompanying the

ComfortNet compatible outdoor AC/HP unit for

troubleshooting information.

Refer to the Troubleshooting Chart at the end of this manual

for a listing of possible air handler error codes, possible

causes and corrective actions.

TART

-U

ROCEDURE

• Prior to start-up, ensure that all electrical connections

are properly sized and tightened.

• All panels must be in place and secured. For Air Tight

application, neoprene gasket must be positioned at

prescribed locations to achieve 2% leakage.

• Tubing must be leak free.

• Unit should be elevated, trapped and pitched to allow

for drainage.

• Low voltage wiring is connected.

• Auxiliary drain is installed when necessary and pitched

to allow for drainage.

• Drain pan and drain tubing has been leak checked.

• Return and supply ducts are sealed.

• Unit is elevated when installed in a garage or where

flammable vapors may be present.

• Unit is protected from vehicular or other physical dam-

age.

• Return air is not obtained from any areas where there

may be objectionable odors, flammable vapors or prod-

ucts of combustion such as carbon monoxide (CO),

which may cause serious personal injury or death.