Common Applications of KBR boilers | 27
6 720 810 590 (2015/05)
Greenstar FS
5.1.2 Wiring - Multi zone with zone valves and LWCO
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)
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
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