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Applications Manual
System # 13
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
Remove factory jumper from terminal #2 & #4
and connect to End Switch of Mult-Zone relay (dry
contacts only)
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
Outdoor Sensor
A
F
DHW Sensor
If using FW200 (Optional):
install FW200 on front of
boiler (see manual)
install outdoor air sensor
Follow FW200 Quick
Set-up guide in Appendix C
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)
X1 X2
end
Zone 2
Zone 3
Zone 1
switch
Zone 1
Zone 2
Zone 3
120 Vac
Power
T T
T T
T T
External Boiler Junction box
L
N
L
N
red
white
storage
mains
tank pump
120v/60 hz
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 power supply to zone relay
3
4
5
2
6
1
max
Bosch Greenstar | 31
Note: Only use
a priority zone
for DHW
Priority
indirect zone
Zone
when not using
the FW200
Priority
Zone
outdoor reset
control. If using
FW200 wire as
shown
L
N
black
ch pump
for unmixed heating
(Not Used)
DHW
Circulator
reset
eco
3
4
e
2
1
6
max
Data subject to change
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