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Applications Manual
System #20
Low Voltage Wiring
out sen
LWCO
BUS
TT
1
2
3
4
CZM100
3
2
1
0
120 VAC
PZ1
PZ2
120 VAC
N
L
L
N
L
N
Wiring:
Low Voltage
Wire BUS terminal of CZM100 to Terminal #1 of
Greenstar FS boiler
Wire CRC controllers to BUS terminals of
CZM100
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
See Appendix A for Room Controller Settings
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.
DHW sen
5
6
See CZM100
Manual for
Detail wiring
4 5 6
1
2
3
4
T0
VZ1
VZ2
VZ3
24VAC
1 2 1 2
3 4
1 2
3 4
1 2
3 4
1 2
PZ3
< 24 V
N
L
BUS
BUS BUS BUS
2-wire, 3 -wire and 4- wire zone valves
1 2 1 2 1 2
1 2
Bosch
Bosch
Bosch
CRC100 or CRC200
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)
L
N
white
mains
120v/60 hz
24 VAC
Transformer
120 Vac
24 Vac
Line Voltage
Wire Main power supply (120 v) to White molex
of Boiler and to 120 VAC input of CZM100
Wire 120 VAC ouput of PZ1 to system pump
3
2
1
Bosch Greenstar | 45
Line Voltage Wiring
L
N
black
ch pump
for unmixed heating
(Not Used)
Neutral
Ground
120 V Line
Note: For Low Water Cutoff Wiring see
Appendix E of this manual
4
3
5
2
6
1
max
Data subject to change
reset
eco
4
e
6
max
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