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Applications Manual
System # 18
Heatronic Internal Wiring
Bosch Controls
Dry contacts
Supply Sensor
Note: For Low Water Cutoff Wiring see
Appendix D of this manual
Wiring:
Low Voltage
Wire BUS terminal of CZM100 to Terminal BB of
Greenstar boiler Heatronic control
Wire CRC controllers to BUS terminals of CZM100
(See Appendix A for Room Controller Settings)
Provide 24 Vac from transformer to Terminals 1
and 2 of CZM100 labeled "24 VAC"
Wire zone valves to "VZ" terminals of CZM100 –
remove jumper from terminal 3 and 4 for 3-wire and
4-wire zone valves
Wire Supply Sensor to "TO" connection of CZM100
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.
See CZM100
B
Manual for
B
Detail wiring
4
2
1
120 VAC
A
Outdoor
Sensor
F
Supply Sensor
Application
Frost protection
Radiant floor heating
Panel radiator system
Cast Iron radiator system
Baseboard & convector system
Typical DHW temperatures
approx. 104 °F (40 °C)
approx. 122 °F (50 °C)
approx. 140 °F (60 °C)
CZM100
4 5 6
3
2
1
2
3
4
1
0
T0
VZ1
VZ2
VZ3
24VAC
1 2 1 2
3 4
1 2
3 4
1 2
3 4
1 2
120 VAC
PZ1
PZ2
PZ3
< 24 V
N
L
L
N
L
N
L
N
BUS
BUS BUS BUS
2-wire, 3 -wire and 4- wire zone valves
1 2 1 2 1 2
1 2
Bosch
Bosch
CRC100 or CRC200
L
white
mains
120v/60 hz
Line Voltage
Wire Main power supply (120 v) to White molex
of Boiler (external junction box) and to 120 VAC
input of CZM100
Wire 120 VAC ouput of PZ1 to system pump
2
1
Bosch Greenstar | 41
24 VAC
Transformer
120 Vac
24 Vac
Bosch
N
L
N
black
ch pump
for unmixed heating
(Not Used)
3
4
5
2
6
1
max
Data subject to change
120 V Line
Neutral
Ground
reset
eco
3
4
e
6
max
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