Chapter 6 UCMs supported by Tracer Summit systems
72 BMTX-SVN01C-EN
Scroll chillers: U.S.-built CGA/CGW and IntelliPak
(CGAF) interfaces
Interfaces for the scroll chillers CGA/CGW and IntelliPak (CGAF) provide
an isolated Comm3 communication link between each scroll chiller and
the BCU. For specific information about the number of scroll chillers
allowed per BCU and per communication link, refer to Table 5 on
page 33.
For information on scroll chillers manufactured in Europe, see “Trane
Europe chiller interface” on page 77.
Wiring requirements
To establish wiring connections between the UCM and the BMTX BCU,
refer to the specifications on wire type, topology, and wire specifications in
“Comm3/Comm4 wiring procedure” on page 36. For the CGA/CGW, attach
the end of the communication link wire to the UCM at TB2-1 and TB2-2.
For the CGAF, attach the end of the communication link wire to the UCM
at the comm link + and – terminals. For detailed information on wiring
the CGAF, refer to CGAF-IOM-1.
Device addressing
Each UCM must have a unique address that is set using a DIP switch on
the scroll chiller. For address DIP switch settings for CGA/CGWs, refer to
Table 17.
For CGAFs, addresses are set from the front panel. Refer to the CGAF
installation, operation, and maintenance manual for details.
Table 17. CGA/CGW address settings
UCM address
Scroll chiller DIP switch settings
SW6-1 SW6-2 SW6-3 SW6-4 SW6-5
33 OFF OFF OFF OFF on
34 OFF OFF OFF on OFF
35 OFF OFF OFF on on
36 OFF OFF on OFF OFF
37 OFF OFF on OFF on
38 OFF OFF on on OFF
39 OFF OFF on on on
40 OFF on OFF OFF OFF
41 OFF on OFF OFF on
42 OFF on OFF on OFF
43 OFF on OFF on on
44 OFF on on OFF OFF
45 OFF on on OFF on
46 OFF on on on OFF
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