Wire The Thermostat To The Hvac Equipment; Diagram 1: Single-Stage Furnace And Ac - Aprilaire 8570 Safety & Installation Instructions

(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.
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)
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SUPPLIED JUMPER
FURNACE
1ST
STAGE W1
HEAT
1ST STAGE
Y1
COOL
FAN
G
RELAY
C
24
VAC
R
120
VAC
1ST
STG Y1
COOL
C
AIR CONDITIONER

Diagram 1: Single-Stage Furnace and AC

- 9 -
APRILAIRE MODEL
8570 THERMOSTAT
W2
THERMOSTAT
W1
CONFIGURATION
RH
SWITCH SETTINGS
R
SINGLE MULTI
RC 1
HP 2 HC
G
ELECT GAS
3
Y1
O 4 B
Y2
B
ELECT/GAS - SET TO
O
ELECT FOR ELECTRIC
C
HEAT, SET TO GAS FOR
FOSSIL FUEL HEAT
I+
AHC
CONNECTION
I-
ZB
6504
ZA CONNECTION
OUTDOOR (ODT)
GND
& INDOOR (IDS)
ODT
TEMPERATURE
SENSORS
IDS
COM EVENT
TRIGGERED
NO
OUTPUT
NC
(ETO)