Goodman Mfg VC8 instruction manual Electrical Connections, To install/connect a dehumidistat

ELECTRICAL CONNECTIONS

Thermostat

R	Single Stage Heating with
	Single Stage Cooling

DIP switch to the desired ON/OFF position. Turn power back on. Refer to the following figure.

RFurnace Integrated

Control Module

NEU

Y C

Dehumidistat

Remote[Optional]

Condensing Unit

(Single-Stage Cooling)

Single Stage Heating with Single Stage Cooling

Heat OFF Delay DIP Switches

OFF	ON
		Move to the ON position
		to select two-stage
		thermostat or OFF to
		select single stage
3		thermostat
		Thermostat
4		Stage Delay

Move to the ON position

S1to select Auto transition delay or OFF for 5 minute transition delay

NOTE: To apply a single-stage Heating Thermostat,

the thermostat selector switch on the Integrated Control Module must be set on single-stage.

						Thermostat
						Two-Stage Heating
			R			with
						Single-Stage Cooling
						Furnace Integrated
			R
						Control Module
		Y C			NEU	Dehumidistat
		Remote				[Optional]
	Condensing Unit
	(Single-Stage Cooling)
	Two-Stage Heating with Single-Stage Cooling
						Thermostat	)
						Two-Stage Heating
Y2				W1	W2	(Two-StagewithCooling
Y2				W1	W2	Furnace Integrated
						Control Module

Y2	NEU
	Dehumidistat
	[Optional]

Remote

Condensing Unit

(Two-Stage Cooling)

Two-Stage Heating with Two-Stage Cooling

Thermostat Wiring Diagrams

SINGLE-STAGE HEATING THERMOSTAT APPLICATION

A single-stage thermostat with only one heating stage may be used to control this furnace. The application of a single-stage thermostat offers 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 a fixed 5 minute time delay or a load based variable time be- tween 1 and 12 minutes (AUTO mode). If the AUTO mode is selected, the control averages the cycle times of the previous three cycles and uses the average to determine the time to transition from low stage to high stage.

To use a single-stage thermostat, turn off power to the furnace, move the thermostat selection DIP switch to the OFF position. Set the desired transition time by setting the transition delay

24 VOLT DEHUMIDISTAT WIRING

The optional usage of a dehumidistat allows the furnace’s circulator blower to operate at a slightly lower speed (85% of desired speed) during a combined thermostat call for cool- ing and dehumidistat call for dehumidification. This can be done through an independent dehumidistat or through a thermostat’s DEHUM terminal (if available). This lower blower speed enhances dehumidification of the conditioned air as it passes through the AC coil. For proper function, a dehu- midistat applied to this furnace must operate on 24 VAC and utilize a switch which opens on humidity rise. Refer to the “Thermostat Wiring Diagrams” figure for additional wir- ing details.

To install/connect a dehumidistat:

1.Turn OFF power to furnace.

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

3.Secure the dehumidistat hot wire (typically the black lead) to the 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, set the dehumidification ENABLE dipswitch from OFF to ON.

Once the switch is set, the dehumidify function is enabled during a combination call for cooling (T-Stat) and dehumidi- fication (DEHUM-Stat).

OFF		ON
9			DEHUM	Move to the ON position
10			Unused	to enable dehumidification
	S5

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 or gas furnace).

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