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System Type F - Variable Speed Oil Furnace with 2 Step Cooling
(Note 6)
Outdoor Unit
24VAC Common B
24VAC Return R
(Note 4)
Compressor Stage 1 Y1
Compressor Stage 2 Y2
Note 1 - May be Y, Y1, or Y
LO
Note 2 - May be Y or Y2
Note 3 - Factory installed jumpers R to O and R to BK
Note 4 - Cut / remove R to BK jumper for 2 step cooling
Note 5 - Field supplied Isolation Relay
Note 6 - For 2 Step Cooling, outdoor unit contains one 2 stage
scroll compressor
Field Wiring Diagrams
Oil Furnace- Variable speed
24VAC Common C
24VAC Return R
Heat Stage 1 W1
(Note 3,
O
Note 4 )
Fan G
Y
LO
Compressor Stage 1 Y
(Note 1)
Compressor Stage 2 BK
(Note 2)
OIL BURNER PRIMARY
R1
(Note 5)
R1
(Isolation relay, See R1 below)
Thermostat Connection
JP1: internal RC/RH Jumper
BLUE
24C
RED
24RC
WHITE
24RH
W1 HEAT
GREEN
G FAN
YELLOW
Y1 COMP
Remote Temperature Sensor Connections and Operation:
Indoor sensor connected to RS1. Replaces internal sensor. RS2 not connected.
Indoor sensor connected to RS2. Averages temperature with internal sensor. RS1 not connected.
Indoor sensors connected to RS1 and RS2. Averages RS1 and RS2 sensor temperatures.
Internal sensor is not used.
Outdoor sensor connected to RS2. Reports outdoor temperature to comfort control.
Indoor sensor connected to RS1 and outdoor sensor connected to RS2. RS1 replaces the internal
sensor. RS2 reports the outdoor temperature to comfort control.
Remote
Sensors
RS1
RS1
RS2
RS2
W2/O/B
Wiring is not
Y2 COMP
polarized
Remote
Sensor 1
Remote
Sensor 2
9
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