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Gas Furnace or Air Handler
Fan G
Heat Stage 1 W1
Compressor Stage 1
Y
LO
24VAC Return R
24VAC Common B/C
Compressor Stage 2
Y
BK
Heat Stage 2 W2
RED
GREEN
WHITE
YELLOW
BLUE
BROWN
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.
Outdoor Unit
Compressor Stage 1 Y1
24VAC Return R
24VAC Common B
Compressor Stage 2 Y2
ORANGE
JP1: Internal RC to
RH jumper
O
W1 HEAT
24RC
24RH
G Fan
W2/O
Y1 Comp
Y2 Comp
24C
RS1
RS1
Sensor Shield
Sensor Shield
H1
HC
RS2
RS2
Thermostat Connection
Remote
Sensor 1
Remote
Sensor 2
System Type B - 2 Stage Variable Speed Gas Furnace or Variable Speed Air Handler with 2 Step Cooling
Note 1 - Field installed jumper from R to O.
(Note 1)
(Note 7)
(Note 2)
(Note 5)
Note 2 - Cut/remove R to BK jumper
Note 3 - For non-communicating variable speed air handler.
(For communicating air handler, use system type A diagram.)
(Note 3, Note 4)
Note 4 - For 2 Step Cooling, outdoor unit contains one 2 stage scroll compressor
Note 5 - JP1 is an internal RC to RH jumper
Note 6 - Remote sensor wiring is not polarized.
Note 7 - May be W or W1. For systems with more than one W terminal,
a field installed jumper is required for W1 to W2 and W3.
Air Handler or Gas Furnace
Fan G
Heat Stage 1 W1
Compressor Stage 1 Y1
24VAC Return R
24VAC Common B/C
Compressor Stage 2 Y2
BK
RED
GREEN
WHITE
YELLOW
BLUE
BROWN
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.
Outdoor Unit
Compressor Stage 1 Y1
24VAC Return R
24VAC Common B
Compressor Stage 2 Y2
ORANGE
JP1: Internal RC to
RH jumper
O
W1 HEAT
24RC
24RH
G Fan
W2/O
Y1 Comp
Y2 Comp
24C
RS1
RS1
Sensor Shield
Sensor Shield
H1
HC
RS2
RS2
Thermostat Connection
Remote
Sensor 1
Remote
Sensor 2
Note 8 - Remote sensor wiring is not polarized.
Note 9 - For heat pumps matched with furnace, dual fuel must be enabled in the
“Mechanical Settings” menu. BAYSEN01ATEMPA required for “restricted”
mode of operation. See “Remote Temperature Sensor Installation”.
System Type C - PSC, CTM, Variable Speed, or 24 Volt Communicating Air Handler or gas furnace with 1 or 2 Stage/Step Heat Pump
Note 1 - May be W or W1.
For systems with more than one W terminal,
a field installed jumper may be required for W1 to W2 and W3.
(Note 1)
(Note 2)
(Note 3)
(Note 4, Note 5, Note 6, Note 7, Note 9)
Note 2 - May be Y, Y1, or Y
LO
Note 3 - May be Y or Y2
Note 4 - Applies to 2 step heat pumps matched with communicating air handler or furnace only.
All other variable speed air handlers use system type D diagram.
Note 5 - For 2 Stage, outdoor unit contains two compressors
Note 6 - For 2 Step, outdoor unit contains one 2 stage scroll compressor
Note 7 - PSC CTM air handler or gas furnace for single stage heat pump only
(Note 8)
(Note 8)
X2
O