Bosch Greenstar Series Installation And Service Instructions For Contractors page 28

Examples of Installations
120/230 V AC
120/
PZ1
230VAC
N L N L
3
120 V AC
3
2
N L
Fig. 12 Wiring
[1] PCB in heating boiler ZBR...-3A
[2] White plug for mains power supply, 120 V AC, 60 Hz
( chapter 7.3.4, page 48)
[3] 120 V AC, 60 Hz
Red plug (for external DHW tank,  chapter 7.3.3, page 48)
[4]
[5] DHW pump
[6] External system supply temperature sensor
[7] Pump heating zone 1
[8] Pump heating zone 2
[9] Pump heating zone 3
[10] Outdoor temperature sensor (optional)
[11] LWCO (Low Water Cut Off, 24V AC Transformer required)
[12] DHW temperature sensor (connection with clear connector)
[13] Optionally connect external system supply temperature sensor
for system supply pipe here (with white plug)
28
CZM100
4 5 6
3
1 2 3 4
2
1
0
≤ 24 V
T0 VZ1 VZ2 VZ3 24VAC
1 2 1 2 3 4 1 2 3 4 1 2 3 4 1 2
≤ 24 V
PZ2 PZ3 BUS BUS BUS BUS
N L N L 1 2 1 2 1 2 1 2
6
5
4 7
N L
LS NS
1
CRC100 CRC100 CRC200
HC3 HC2
8 9
B
B
4
2
10
F
A
11
12
For all accessories not included in the package please refer to the Bosch
Product Catalog.
HC1
13
6 720 806 992-06.2O
Greenstar – 6721822579 (2021/01)