Bosch Greenstar Series, Installation And Service Instructions For Contractors, Page: 28 / 80

Examples of Installations
Greenstar – 6721822579 (2021/01) 28
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
[4] Red plug (for external DHW tank,

chapter 7.3.3, page 48)
[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)
For all accessories not included in the package please refer to the Bosch
Product Catalog.
B
B
F
A
6 720 806 992-06.2O
9
8
7
LZ
NZ
4
2
L N
F
V
L N
LS NS
5
4
1
13
3
2
11
10
12
9 8 7
1 2
BUS BUS
1 2 1 2
BUS BUS
1 2
≤ 24 V
N L
120/
230VAC
120/230 V AC
N N L N L L
PZ2 PZ3 PZ1
1 2 1 2
T0 24VAC
3 4 1 2
VZ1
3 4 1 2
VZ2
3 4 1 2
VZ3
≤ 24 V
0
1
2
3
4 5 6
CZM100
1 2 3 4
3
120 V AC
6
CRC200
HC1
CRC100
HC3
CRC100
HC2