Installation and Maintenance Manual

Installation - Electrical
RLC-SVX09H-EN 11 3
shielded, twisted pair connection establishes the bi-
directional communications link between theTracer
CH530 and the building automation system.
Note: To prevent control malfunctions, do not run low
voltage wiring (<30 V) in conduit with conductors
carrying more than 30 volts.
Field wiring for the communication link must meet the
following requirements:
• All wiring must be in accordance with the NEC and
local codes.
• Communication link wiring must be shielded, twisted
pair
wiring (Belden 8760 or equivalent). See the table
below for wire size selection:
• The communication link cannot pass between
buildings.
• All units on the communication link can be connected
in
a “daisy chain” configuration.
LonTalk Communications Interface for Chillers
(LCI-C)
CH530 provides an optional LonTalk Communication
Interface (LCI-C) between the chiller and a Building
Automation System (BAS). An LCI-C LLID shall be used to
provide "gateway" functionality between a LonTalk
compatible device and the Chiller.The inputs (outputs
include both mandatory and optional network variables as
established by the LonMark Functional Chiller Profile 8040.
Installation Recommendations
• 22 AWG Level 4 unshielded communication wire
recommended for most LCI-C installations
• LCI-C link limits: 4500 feet, 60 devices
• Termination resistors are required
• 105 ohms at each end for Level 4 wire
• 82 ohms at each end forTrane "purple" wire
• LCI-C topology should be daisy chain
• Zone sensor communication stubs limited to 8 per link,
50
feet each (maximum)
• One repeater can be used for an additional 4500 feet,
60
devices, 8 communication stubs
BACnet Communications Interface for Chillers
(BCI-C)
The optional BACnet Communication Interface for Chillers
(BCI-C) is comprised of aTracer UC400 controller with
interface software. It is a non-programmable
communications module that allows the RTWD or RTUD
unit to communicate on a BACnet communications
network.
BACnet Data Points and Configuration Property
Definitions. The BCI-C device allows certain models of
Trane chillers with CH530 controls to communicate with
WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.
Table 96. Wire Size
Wire Size
Maximum Length of
Communication Wire
14 AWG (2.5 mm
2
) 5,000 ft (1525 m)
16 AWG (1.5 mm
2
) 2,000 ft (610 m)
18 AWG (1.0 mm
2
) 1,000 ft (305 m)
Table 97. LonTalk points list
LonTalk Communications Interface
Inputs
Variable
type SNVT_Type
Chiller Enable/Disable binary
start(1)/
stop(0)
SNVT_switch
Chilled Water Setpoint analog temperature SNVT_temp_p
Current Limit Setpoint analog % current SNVT_lev_percent
Chiller Mode Note 1 SNVT_hvac_mode
Outputs
Variable
type
SNVT_Type
Outputs
Variable
type
SNVT_Type
Chiller On/Off binary on(1)/off(0) SNVT_switch
Active Chilled Water
Setpoint
analog temperature SNVT_temp_p
Percent RLA analog % current SNVT_lev_percent
Active Current Limit
Setpoint
analog % current SNVT_lev_percent
Leaving Chilled Water
Temperature
analog temperature SNVT_temp_p
Entering Chilled Water
Temperature
analog temperature SNVT_temp_p
Entering Condenser
Water Temperature
analog temperature SNVT_temp_p
Leaving Condenser
Water Temperature
analog temperature SNVT_temp_p
Alarm Description See Note 2 SNVT_str_asc
Chiller Status See Note 3 SNVT_chlr_status
Notes:
1. Chiller Mode is used to place the chiller into an alternate mode; Cool or
Ice Build
2. Alarm Description denotes alarm severity and target.
Severity: no alarm, warning, normal shutdown, immediate shutdown
Target: Chiller, Platform, Ice Building (Chiller is refrigerant circuit and
Platform is control circuit)
3. Chiller Status describes Chiller Run Mode and Chiller Operating Mode.
Run Modes: Off, Starting, Running, Shutting Down
Operating Modes: Cool, Ice Build
States: Alarm, Run Enabled, Local Control, Limited, CHW Flow, Cond
Flow