Bosch ZBR16-3A Series Installation And Service Instructions Manual page 29

Fig. 10 Wiring
[1] PCB in heating boiler ZBR..-3A... with FW 200 installed on front
[2] White plug for mains power supply, 120 V AC, 60 Hz
( chapter 7.3.4, page 49)
[3] 120 V AC, 60 Hz
[4] Red plug for external DHW tank ( chapter 7.3.3, page 49)
[5] DHW pump
[6] Black plug for extermnal (system) pump ( chapter 7.3.2,
page 48)
[7] System pump
[8] DPDT Relay
[9] Motorized valve heating zone 2
[10] Motorized valve heating zone 1
[11] 24 V AC transformer
[12] Outdoor temperature sensor
[13] LWCO (Low Water Cut Off, 24V AC Transformer required)
[14] DHW temperature sensor (connection with clear connector)
[15] External supply temperature sensor (connection with white plug)
Greenstar
3
2
LS NS
N L
11
M M
10 9
5
4
3
6
B
B
4
2
N L
F
A
1
Common Applications of ZBR boilers | 29
3
8 R W 24VAC
T T COM
N H 3 4 4 5 5 6
7
12
13
14
15
6 720 806 992-04.1O
6 720 806 992 (2015/03)