Page 19 of 97 PN: 106417-05
3.6 Older Arctic or FreeFlex 1000 with Concert Display
Figure 3-12: Older Arctic/FreeFlex 1000 with Concert Modbus RS485 Wiring
NOTICE:
1. Arctic/FreeFlex with Concert Display can do both Lead Lag (Sequencer) and EMS communication at the
same time.
2. For Arctic/FreeFlex Boilers not equipped with PCBs refer to 4109 profile (Apex, Alpine or ASPEN) wiring.
3. Older Arctic/FreeFlex 1500 – 3000 boilers equipped with this PCB may use this wiring.
4. When connecting Arctic/FreeFlex 1000 to Arctic/FreeFlex 1500 – 3000 use the pinout table shown above to
create a proper cable.
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