Wiring - Multi Zone With Zone Valves And Lwco - Bosch KBR16-3 Installation And Service Instructions Manual

5.1.2

Wiring - Multi zone with zone valves and LWCO

When using CZM100 and CRC100 or CRC200 controls the factory installed jumper at terminal [2e] remains.
The LWCO jumper on terminal [2g] is removed when using a LWCO.
For LWCO function an external transformer is required
3
3
2
1
120V AC
PZ1 PZ2 PZ3
120VAC
N L N L N L
N L
4
PZ1
DHW Tank Pump
L N
1
a
b
Fig. 12 Wiring
[1] High Voltage connection box
[1a] 120 V AC mains power (white plug)
[1b] DHW Storage tank circulator pump (red plug)
[1c] System circulator pump (black plug)
[2] Low Voltage connection box
[2d] BUS EMS connection
[2e] TT - Thermostat/On demand signal (pre-wired link) (dry signal)
[2f] Out Sen - (Outdoor sensor, sold separately)
[2g] LWCO - (pre-wired link) (Low Water Cut Off switch, sold
separately)
[2h] DHW Sen - (Tank sensor)
[2k] Empty (future connectivity)
[3] CZM100 (Comfort Zone Manager 100)
[4] PZ1 - System pump
[5] VZ1, VZ2 - Zone valves
[6] 24V Transformer
[7] CRC100 or CRC200 Zone 1 (Comfort room controller)
[8] CRC100 or CRC200 Zone 2 (Comfort room controller)
Greenstar FS
CZM100
4 5 6
1 2 3 4
0
N L
1 2 1 2
M M
VZ1 VZ2
BUS TT out sen LWCO DHW sen
1 2 3 4 5 6
Rear of Greenstar boiler
c
≤ 24 V
T0 VZ1 VZ2 VZ3
1 2 1 2 3 4 1 2 3 4 1 2 3 4
≤ 24 V
BUS BUS BUS BUS
1 2 1 2 1 2 1 2
3
5
TT TT
BUS Out Sen
1 2
e
d
Common Applications of KBR boilers | 27
7
24VAC
1 2
1 2
6
24 V AC
120 V AC
24 V AC
2
LWCO LWCO DHW Sen
4 5 6
3
g
f h k
6 720 810 590 (2015/05)
8
6720810590-72 .1Wo