Goodman Mfg AMV8 Setting the Heat Anticipator, SINGLE-STAGE Thermostat Application

Thermostat Diagrams

SETTING THE HEAT ANTICIPATOR

The following method should be used in measuring the amp draw of the control circuit to assure proper adjustment of the thermostat heat anticipator

R

R

•Wrap the “R” leg around a clip-on amp meter 10 times.

•Energize the furnace in the heat mode.

•Record the reading.

•Divide this reading by 10.

•Set the heat anticipator on the thermostat to match this reading.

Example: If the reading on the amp meter is “4”, divide this by 10. The anticipator setting will be .4 amps.

SINGLE-STAGE THERMOSTAT APPLICATION

A single-stage thermostat with only one heating stage can be used to control this furnace. The application of a single-stage thermostat does not offer “true” thermostat-driven two-stage operation, but provides a timed transition from low to high fire. The furnace will run on low stage for a fixed period of time before stepping up to high stage to satisfy the thermostat’s call for heat. The delay period prior to stepping up can be set at either 5 or 10 minutes through the DIP switch adjacent to the Heat Off delay DIP switches on the integrated control module. To use a single-stage thermostat, turn off power to the furnace, move the thermostat selection jumper on the integrated control module from the “two-stage” position to the “single-stage” position, turn power back on. Refer to the following figures.

T		T-Stat selection jumper in	T
W	TSTAT	single-stage thermostat	W
O		position.	O	TSTAT
S			S
I	ON		I	OFF
N		3	N		3
G			G
L		2	L		2
E			E
		1			1
	DIP switch position 3: ON			DIP switch position 3: OFF
	Delay Period: 10 minutes.			Delay Period: 5 minutes.

3.Secure the dehumidistat hot wire (typically the black lead) to the screw terminal marked “R” on the furnace integrated control module.

4.Secure the dehumidistat ground wire (typically the green lead) to the ground screw on the furnace junction box. NOTE: Ground wire may not be present on all dehumidistats.

5.Turn ON power to furnace.

To enable the dehumidify function on the integrated control module:

1.Cut the jumper wire labeled “CUT FOR DEHUM” located adjacent to the DEHUM screw terminal.

Once the jumper wire is cut, the dehumidify function is enabled during a combination call for cooling (T-Stat) and dehumidification (Dehum-Stat). The yellow LED adjacent to the DEHUM screw terminal will be illuminated during dehumidification.

0	YL0	Y	B/C	G	R	W 1		W 2	DEHUM
									TWIN	DEHUMIDIFICATION
									TP1
										LED (YELLOW)
0	YL0	Y	B/C	G	R	W1		W2	TP2
			R84					R191	DS7
	DS5	DS4		DS3		R85
			R22
					CUT FOR		W14		W3
								R128		DEHUMIDIFICATION
					DEHUM
						R122				JUMPER WIRE
								CR35		(CUT TO ENABLE)

FOSSIL FUEL APPLICATIONS

This furnace can be used in conjunction with a 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, gas furnace, or both).

A heat pump thermostat with three stages of heat is required to properly use a two-stage furnace in conjunction with a heat pump. Refer to the fossil fuel kit installation instructions for additional thermostat requirements.

Strictly follow the wiring guidelines in the fossil fuel kit installation instructions. All furnace connections must be made to the furnace two-stage integrated control module and the “FURNACE” terminal strip on the fossil fuel control board.

115 VOLT LINE CONNECTION OF ACCESSORIES (HUMIDIFIER AND ELECTRONIC AIR CLEANER)

WARNING

TO AVOID PERSONAL INJURY, ELECTRICAL SHOCK OR DEATH, DISCONNECT ELECTRICAL POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING.

24VOLT DEHUMIDISTAT WIRING

The optional usage of a dehumidistat allows the furnace’s circulator blower to operate at a slightly lower speed during a combined thermostat call for cooling and dehumidistat call for dehumidification. This lower blower speed enhances dehumidification of the conditioned air as it passes through the AC coil. For proper function, a dehumidistat applied to this furnace must operate on 24 VAC and utilize a switch which opens on humidity rise.

To install/connect a dehumidistat:

1.Turn OFF power to furnace.

2.Secure the dehumidistat neutral wire (typically the white lead) to the screw terminal marked “DEHUM” on the furnace integrated control module.

IO-247A

The furnace integrated control module is equipped with line voltage accessory terminals for controlling power to an optional field- supplied humidifier and/or electronic air cleaner.

The accessory load specifications are as follows:

Humidifier	1.0 Amp maximum at 120 VAC
Electronic Air Cleaner	1.0 Amp maximum at 120 VAC

Turn OFF power to the furnace before installing any accessories. Follow the humidifier or air cleaner manufacturers’ instructions for locating, mounting, grounding, and controlling these accessories. Accessory wiring connections are to be made through the 1/4" quick connect terminals provided on the furnace integrated control module. The humidifier and electronic air cleaner hot and neutral terminals are identified as HUM and EAC.

16 12/04