Bosch 19 SEER Series Operation Manual page 18

1 8 | Bosch Inverter Ducted Packaged Heat Pump
Support 3H and 2C thermostat
(2-COOL here represents 2 stages of fan cooling only,
the compressor modulates separately from the fan.)
R
C
Y
Y2
G
O/B
W/E
H/DH
THERMOSTAT
Support 3H and 1C thermostat
(Y1/Y2 jumped for fan control, not
related to compressor operation.)
R
C
Y
G
O/B
W/E
W2
H/DH
THERMOSTAT
Support 1H and 1C thermostat
(Y1/Y2 jumped for fan control, not
related to compressor operation.)
R
C
Y
G
O/B
H/DH
THERMOSTAT
Figure 17 Thermostat Wiring Diagrams
Dh wiring is optional and requires a thermostat with a
humidistat. Dh functions as Passive Dehumidifi cation and will
downstage the indoor fan to fi rst stage. System will operate
according to normal sequence of operations if Dh wiring is absent.
Data subject to change
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
(2-COOL here represents 2 stages of fan cooling only,
the compressor modulates separately from the fan.)
RED
R
BROWN
C
YELLOW
Y
PURPLE
Y2
GREEN
G
BLUE
O/B
WHITE
W/E
WHITE/BLACK
W2
GRAY
H/DH
UNIT CONTROL BOARD
THERMOSTAT
TERMINAL STRIP
Support 2H and 2C thermostat
(2-COOL here represents 2 stages of fan cooling only,
the compressor modulates separately from the fan.)
RED
R
BROWN
C
YELLOW
Y
PURPLE
Y2
GREEN
G
BLUE
O/B
GRAY
H/DH
UNIT CONTROL BOARD
THERMOSTAT
TERMINAL STRIP
Support 2H and 1C thermostat
(Y1/Y2 jumped for fan control, not
related to compressor operation.)
RED
R
BROWN
C
YELLOW
Y
GREEN
G
BLUE
O/B
WHITE
W/E
GRAY
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). 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 & Operation Manual
R
C
Y1
Y2
G
B
W1
W2
Dh
R
C
Y1
Y2
G
B
W1
W2
Dh
R
C
Y1
Y2
G
B
W1
W2
Dh
03.2019 | BTC 761701105 A