Goodman Mfg VC8 instruction manual System Wiring using Four-Wires, CTK01AA

COMFORTNET™ SYSTEM

FOSSILFUELAPPLICATIONS

This furnace can be used in conjunction with a ComfortNet™ com- patible heat pump in a fossil fuel application. A fossil fuel applica- tion 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 CTK01AA thermostat, the furnace/heat pump system is automically configured as a fossil fuel system. The balance point temperature may be adjusted via the CTK01AA thermostat advanced user menus (see CTK01AA instructions for additional information).

CTK01AA WIRING

NOTE: Refer to Electrical Connections for 115 volt line connections to the furnace.

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 multiple wires into a single terminal be twisted together prior to inserting into the plug connector. Failure to do so may result in intermittent operation.

Typical 18 AWG thermostat wire may be used to wire the sys- tem 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.

FOUR-WIRE INDOOR AND OUTDOOR WIRING

Typical ComfortNet™ wiring will consist of four wires between the indoor unit and outdoor unit and between the indoor unit and thermostat. The required wires are: (a) data lines, 1 and 2;

Four wires are required between the indoor unit and thermo- stat.

NOTE: Use of the CTK01AA transformer is recommended if installing a dual fuel/fossil fuel system. Failure to use the transformer in the outdoor unit could result in over loading of the furnace transformer.

						CTK01AA
		1	2	R	C	Thermostat
		1	2	R	C	CT Compatible
						Furnace Integrated
						Control Module
40VA Transformer (included in						CT Compatible
CTK01AA kit)		1	2	R	C
						AC/HP Integrated
						Control Module
208/230 VAC	24 VAC

System Wiring using Two-Wires between Furnace and AC/HP

and Four-Wires between Furnace and Thermostat

CT COMPATIBLE FURNACE WITH NON-CTCOMPATIBLE SINGLE- STAGE AIR CONDITIONER

Four wires are required between the furnace and thermostat. Two wires are required between the furnace control and single stage air conditioner. For this system configuration, the “Y1” terminal on the integrated furnace control becomes an output rather than an input. The “Y1” connection to the outdoor unit is made using both 4- position thermostat connectors in the CTK01AA kit. Remove the red keying tabs from the on-board connector block and position both 4-position connectors such that “1”, “2”, “R”, “C”, and “Y1” positions are filled.

(b) thermostat “R” (24 VAC hot) and “C” (24 VAC common).

CTK01AA

1 2 R C Thermostat

1	2	R	C	CT Compatible Furnace
				Integrated Control Module
1	2	R	C	CT Compatible AC/HP

CTK01AA	4-Position Connectors
Thermostat	from CTK01AA
1 2 R C	Thermostat Kit

1 2 R C G W1 W2 Y1 Y2 O

CT Compatible

Furnace Integrated

Control Module

Integrated Control Module

System Wiring using Four-Wires

TWO-WIRE OUTDOOR, FOUR-WIRE INDOOR WIRING

Two wires can be utilized between the indoor and outdoor units. For this wiring scheme, only the data lines, 1 and 2, are needed required between the indoor and outdoor units. A 40VA, 208/ 230 VAC to 24VAC transformer must be installed in the out- door unit to provide 24VAC power to the outdoor unit’s elec- tronic control. The transformer is included with the CTK01AA kit. See kit instructions for mounting and wiring instructions.

C	Y	Non-CT Compatible
		Single Stage AC

System Wiring between Furnace and Non-CT Compatible

Single Stage Air Conditioner

COMFORTNET SYSTEM ADVANCED FEATURES

The ComfortNet system permits access to additional system information, advanced setup features, and advanced diagnos- tic/troubleshooting features. These advanced features are or- ganized into a menu structure. The menus are accessed and navigated as described in the following section.

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