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Applications Manual
System #29
Heatronic Internal Wiring
Bosch Controls
Dry contacts
Outdoor
Sensor
DHW Sensor
Supply Sensor
Note: For Low Water Cutoff Wiring see
Appendix D of this manual
Wiring:
Low Voltage
Wire BUS terminal of the Bosch Control to
Terminal BB of Greenstar boiler
Wire Greenstar Tank thermistor sensor to blue
molex adaptor in Greenstar boiler wire harness
Wire Supply Sensor to terminals in the Heatronic
control
Heatronic Settings:
Boiler
Typical supply
Heating
temperatures
Dial
1
approx. 95 °F (35 °C)
2
approx. 109 °F (43 °C)
3
approx. 122 °F (50 °C)
4
approx. 140 °F (60 °C)
5
approx. 153 °F (67 °C)
6
approx. 167 °F (75 °C)
max
Approx. 194 °F (90°C)
DHW thermostat
min
e
max
Bosch Thermotechnology Corp.
B
B
4
2
1
A
F
DHW Thermistor
Supply Sensor
Application
Frost protection
Radiant floor heating
Panel radiator system
Cast Iron radiator system
Baseboard & convector system
Typical DHW temperatures
approx. 59 °F (15 °C)
approx. 131 °F (55 °C)
approx. 158 °F (70 °C)
Bosch
Control
External Boiler Junction box
L
N
L
red
white
storage
mains
120v/60 hz
tank pump
L
G
N
120 Vac Supply
Line Voltage
Wire Main power supply (120 v) to White molex
of Boiler (external junction box)
Wire 120 VAC of Black Molex to Zone Circulator
Wire 120 VAC of Red Molex to DHW Circulator
3
4
5
2
1
6
max
Bosch Greenstar | 63
L
N
N
black
ch pump
for unmixed heating
Zone
Circulator
DHW
Circulator
reset
eco
3
4
e
2
6
1
max
Data subject to change
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