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APRILAIRE MODEL
8570 THERMOSTAT
1ST
STG
COOL
AIR CONDITIONER
Y1
C
FAN
RELAY
1ST
STAGE
HEAT
R
FURNACE
C
G
Y1
W1
1ST STAGE
COOL
L1
L2
120
VAC
24
VAC
HEAT
RELAY
R
RADIANT FLOOR HEAT
C
W
L1
L2
120
VAC
24
VAC
1
2
4
5
7
8
W
R
Y
24V COM
E/W2
Y
O
3
6
9
MODEL 8024 24-VOLT
RELAY PACK (not supplied)
SUPPLIED JUMPER
ZA
ZB
I+
I-
6504
CONNECTION
B
O
Y2
Y1
G
RC
R
RH
W1
W2
C
AHC
CONNECTION
ELECT/GAS - SET TO
ELECT FOR ELECTRIC
FURNACE, SET TO GAS
FOR FOSSIL FUEL
FURNACE
THERMOSTAT
CONFIGURATION
SWITCH SETTINGS
OUTDOOR (ODT)
& INDOOR (IDS)
TEMPERATURE
SENSORS
HC
SINGLE
B
GAS
HP
MULTI
O
ELECT
4
3
2
1
ON
NC
NO
COM
EVENT
TRIGGERED
OUTPUT
(ETO)
IDS
ODT
GND
APRILAIRE MODEL
8570 THERMOSTAT
1ST
STG
COOL
AIR CONDITIONER
Y1
C
FAN
RELAY
R
INDOOR AIR HANDLER
C
G
Y1
1ST STAGE
COOL
L1
L2
120
VAC
24
VAC
HEAT
RELAY
R
BOILER
C
W
L1
L2
120
VAC
24
VAC
REMOVE RH PRONG
FROM SUPPLIED JUMPER
ZA
ZB
I+
I-
6504
CONNECTION
B
O
Y2
Y1
G
RC
R
RH
W1
W2
C
AHC
CONNECTION
ELECT/GAS - SET TO
ELECT FOR HOT WATER
COIL HEAT, SET TO GAS
FOR RADIANT HEAT
THERMOSTAT
CONFIGURATION
SWITCH SETTINGS
OUTDOOR (ODT)
& INDOOR (IDS)
TEMPERATURE
SENSORS
HC
SINGLE
B
GAS
HP
MULTI
O
ELECT
4
3
2
1
ON
NC
NO
COM
EVENT
TRIGGERED
OUTPUT
(ETO)
IDS
ODT
GND
- 12 - - 13 -
Diagram 4: Boiler with AC Diagram 5: Radiant Floor 1st Stage Heat with Furnace 2nd Stage Heat and AC