Aprilaire 8570 installation instructions Wire the Thermostat to the Hvac Equipment

(5) WIRE THE THERMOSTAT TO THE HVAC EQUIPMENT

WARNING 120 volts may cause serious injury from electrical shock. Disconnect electrical power to the furnace and air conditioner before starting installation. This thermostat is not a 120 volt (line voltage) device.

			APRILAIRE MODEL
		SUPPLIED JUMPER	8570 THERMOSTAT
FURNACE			W2
			W1
			RH
1ST			R
STAGE	W1		RC
HEAT
			G
1ST STAGE	Y1
COOL			Y1
			Y2

THERMOSTAT

CONFIGURATION SWITCH SETTINGS

SINGLE 1	ON	MULTI
HP 2		HC
ELECT 3		GAS
O 4		B

1.Run a cable with the correct number of wires

(see table) from the thermostat to the HVAC equipment.

2.Strip 1/4" of insulation from the end of the wires to be connected to the thermostat.

3.Strip no more insulation than is required to make a sound electrical connection at the HVAC equipment.

4.Wire the thermostat to the HVAC equipment according to the wiring schematic appropriate for your HVAC equipment.

Application	# Wires	Diagram (Page)
Single-Stage Furnace/AC	5	1 (9)
Two-Stage Furnace/AC	7	2 (10)
Two-Stage Roof Top Unit	7	3 (11)
Boiler w/AC (2-transformer)	6	4 (12)
Radiant 1st Stage Heat,	6	5 (13)
Furnace 2nd Stage and AC
Single-Stage Heat Pump	6	6 (14)
Single-Stage Heat Pump	7	7 (15)
w/Two Stages Aux. Heat
Two-Stage Heat Pump	8	8 (16)

FAN		G	B
RELAY
		C	O
	24		C
	VAC	R	I+
				AHC
L2	120	L1	I-	CONNECTION
	VAC		ZB		6504
			ZA		CONNECTION
1ST			GND		OUTDOOR (ODT)
					& INDOOR (IDS)
STG		Y1	ODT		TEMPERATURE
COOL			IDS		SENSORS
		C
			COM		EVENT
			NO		TRIGGERED
					OUTPUT
AIR CONDITIONER			NC
					(ETO)

Diagram 1: Single-Stage Furnace and AC

ELECT/GAS - SET TO ELECT FOR ELECTRIC HEAT, SET TO GAS FOR FOSSIL FUEL HEAT

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