Common Applications of KBR boilers | 29
6 720 810 590 (2015/05)
Greenstar FS
5.2.2 Wiring
Fig. 15 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, PZ2 - Zone circulator pumps
[5] CRC100 or CRC200 Zone 1 (Comfort room controller)
[6] CRC100 or CRC200 Zone 2 (Comfort room controller)
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
12
BUSBUS
1212
BUS BUS
1 2
≤ 24 V
NL
120VAC
120V AC
NNLNLL
PZ2 PZ3PZ1
121
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