Installation: Controls; Uc800 Specifications; Wiring And Port Descriptions; Communication Interfaces - Trane CVHE Installation, Operation And Maintenance Manual

Installation: Controls

This section covers information pertaining to the UC800
controller hardware. For information about the Tracer
AdaptiView™ display, which is used to interface with the
internal chiller data and functions provided by the UC800,
refer to Tracer AdaptiView™ Display for Water-Cooled
CenTraVac™ Chillers Operations Guide (CTV-SVU01*-EN,
or the most recent version).

UC800 Specifications

Power Supply
The UC800 (1A22) receives 24 Vac (210 mA) power from
the 1A2 power supply located in the chiller control panel.

Wiring and Port Descriptions

Figure 24 illustrates the UC800 controller ports, LEDs,
rotary switches, and wiring terminals. The numbered list
following Figure 24 corresponds to the numbered callouts
in the illustration.
Figure 24. Wiring locations and connection ports
2 3 4
6
1
Front View
CVHE-SVX02H-EN
LINK MBUS
5
6
7
8
9
10
11
Figure 24. Wiring locations and connection ports
Bottom View
1. Rotary Switches for setting BACnet
2. LINK for BACnet MS/TP , or MODBUS Slave (two terminals, ±). Field
wired if used.
3. LINK for BACnet MS/TP , or MODBUS Slave (two terminals, ±). Field
wired if used.
4. Machine bus for existing machine LLIDs (IPC3 Tracer bus 19.200 baud).
IPC3 Bus: used for Comm4 using TCI or LonTalk
5. Power (210 mA at 24 Vdc) and ground terminations (same bus as
item 4). Factory wired.
6. Not used.
7. Marquee LED power and UC800 Status indicator
8. Status LEDs for the BAS link, MBus link, and IMC link.
9. USB device type B connection for the service tool (Tracer TU).
10. The Ethernet connection can only be used with the Tracer AdaptiView
display.
11. USB Host (not used).

Communication Interfaces

There are four connections on the UC800 that support the
communication interfaces listed. Refer to
for the locations of each of these ports.
• BACnet MS/TP
• MODBUS Slave
• LonTalk using LCI-C (from the IPC3 bus)
• Comm 4 using TCI (from the IPC3 bus)

Rotary Switches

There are three rotary switches on the front of the UC800
controller. Use these switches to define a three-digit
address when the UC800 is installed in a BACnet or
MODBUS system (e.g., 107, 127, etc.).
Note: Valid addresses are 001 to 127 for BACnet and 001
to 247 for MODBUS.

LED Description and Operation

There are 10 LEDs on the front of the UC800.
shows the locations of each LED and
describes their behavior in specific instances.
10
11
® ®
MAC address or MODBUS ID.
®
using LCI-C.
(Table 11, p. 38).
Figure 24, p. 37
Figure 25
Table 11, p. 38
37