Bosch FS 151 - System 20 Low Voltage Wiring and Settings

Applications Manual Bosch Greenstar | 45
Bosch Thermotechnology Corp.
Data subject to change
System #20
BUS
TT
out sen
LWCO
DHW sen
1
2
3 4
5 6
reset
eco
1
2
34
5
6
max
1
2
34
e
6
max
DHW thermostat
min
e
max
Typical DHW temperatures
approx. 104 °F (40 °C)
approx. 122 °F (50 °C)
approx. 140 °F (60 °C)
Boiler
Heating
Dial
1
2
3
Typical supply
temperatures
approx. 95 °F (35 °C)
approx. 109 °F (43 °C)
approx. 122 °F (50 °C)
4
5
6
approx. 140 °F (60 °C)
approx. 153 °F (67 °C)
approx. 167 °F (75 °C)
max Approx. 194 °F (90°C)
Application
Frost protection
Radiant floor heating
Panel radiator system
Cast Iron radiator system
Baseboard & convector system
Neutral
120 V Line
Ground
Low Voltage Wiring Line Voltage Wiring
Heatronic Settings:
Low Voltage
Ź Wire BUS terminal of CZM100 to Terminal #1 of
Greenstar FS boiler
Wiring:
Line Voltage
Ź Wire Main power supply (120 v) to White molex
of Boiler and to 120 VAC input of CZM100
See CZM100
Manual for
Detail wiring
CRC100 or CRC200
CZM100
Ź Wire CRC controllers to BUS terminals of
CZM100
Ź Wire 120 VAC ouput of PZ1 to system pump
Bosch Bosch
VZ3
VZ1
T0
24VAC
VZ2
1
21
21
2
1
21
2
3
4
3
4
3
4
24 VAC
Transformer
2-wire, 3 -wire and 4- wire zone valves
120 Vac
24 Vac
PZ3
PZ2
PZ1
120 VAC
L
NL
N
L
N
L
N
< 24 V
BUS
1
21
21
21
2
BUS
BUS BUS
120 VAC
Bosch
Ź Provide 24 Vac from transformer to Terminals 1
and 2 of CZM100 labeled “24 VAC”
ŹWire zone valves to “VZ” terminals of CZM100 –
remove jumper from terminal 3 and 4 for 3-wire and
4-wire zone valves
1
4
5
6
0
3
2
1
2 3 4
Ź See Appendix A for Room Controller Settings
L
N
black
ch pump
for unmixed heating
(Not Used)
L
N
white
mains
120v/60 hz
Note: For Low Water Cutoff Wiring see
Appendix E of this manual