Bosch 15 SEER2 Series Installation Instructions Manual page 21

Support 3H and 2C thermostat
R
C
Y
Y2
G
O/B
W/E
H/DH
THERMOSTAT
Support 3H and 1C thermostat
R
C
Y
G
O/B
W/E
W2
H/DH
THERMOSTAT
Support 1H and 1C thermostat
R
C
Y
G
O/B
H/DH
THERMOSTAT
Figure 18 Thermostat Wiring Diagrams
Dh wiring is optional and requires a thermostat with a
humidistat. Dh functions as Passive Dehumidication and will
downstage the indoor fan speed. System will operate according to
normal sequence of operations if Dh wiring is absent.
Y2 wiring is optional for 4 speed fan control. For 2 stage fan
control Y2 wiring is required.
Bosch 15 SEER2 Inverter Ducted Packaged Heat Pump - BTC 761701319 A (12.2022)
RED
R
BROWN
C
YELLOW
Y1
PURPLE
Y2
GREEN
G
BLUE
B
WHITE
W1
W2
GRAY
Dh
UNIT CONTROL BOARD
TERMINAL STRIP
RED
R
BROWN
C
YELLOW
Y1
Y2
GREEN
G
BLUE
B
WHITE
W1
WHITE/BLACK
W2
GRAY
Dh
UNIT CONTROL BOARD
TERMINAL STRIP
RED
R
BROWN
C
YELLOW
Y1
Y2
GREEN
G
BLUE
B
W1
W2
GRAY
Dh
UNIT CONTROL BOARD
TERMINAL STRIP
Support 4H and 2C thermostat
RED
R
R
BROWN
C
C
YELLOW
Y1
Y
PURPLE
Y2 Y2
GREEN
G
G
BLUE
B
O/B
WHITE
W1
W/E
WHITE/BLACK
W2
W2
GRAY
Dh
H/DH
UNIT CONTROL BOARD
THERMOSTAT
TERMINAL STRIP
Support 2H and 2C thermostat
RED
R
R
BROWN
C C
YELLOW
Y1
Y
PURPLE
Y2
Y2
GREEN
G
G
BLUE
B
O/B
W1
W2
GRAY
Dh
H/DH
UNIT CONTROL BOARD
THERMOSTAT
TERMINAL STRIP
Support 2H and 1C thermostat
RED
R
R
BROWN
C
C
YELLOW
Y1
Y
Y2
GREEN
G
G
BLUE
B
O/B
WHITE
W/E W1
W2
GRAY
Dh
H/DH
UNIT CONTROL BOARD
THERMOSTAT
TERMINAL STRIP
Dashed lines in the above thermostat wiring diagrams refer
to optional wiring (wiring for Passive Dehumidifi cation Function
and/OR Electric Heat, and 2 stage fan control). For thermostat
wiring please refer to the Owner's Manual of the thermostat.
B wire must be used with heat pump system only, the
reversing valve energizes in heating.
Installation Instructions
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