30
RT-SVX34V-EN
Table 9. AC conductors size
Distance from unit to control Recommended wire size
000-460 feet
18 gauge
461-732 feet
16 gauge
733-1000 feet
14 gauge
Field Installed DC Control Wiring
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury.
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/national
electrical codes.
NOTICE
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as the equipment was not
designed or qualified to accept other types of
conductors.
Before installing the connecting wiring between the
components utilizing a DC analog output/input signal and
the unit, refer to Table 10, p. 30 for conductor sizing
guidelines and;
• Use standard copper conductor thermostat wire unless
otherwise specified.
• Ensure that the wiring between the controls and the
unit's termination point does not exceed two and a half
(2-1/2) ohms/conductor for the length of the run.
Note: Resistance in excess of 21/2 ohms per conductor
can cause deviations in the accuracy of the
controls.
• Refer to dimensional drawings beginning with for the
electrical access locations provided on the unit.
• Do not run the electrical wires transporting DC signals
in or around conduit housing high voltage wires.
Table 10. DC conductors
Distance from unit to control Recommended wire size
000-150 feet
22 gauge
151-240 feet
20 gauge
241-385 feet
18 gauge
386-610 feet
16 gauge
611-970 feet
14 gauge
LonTalk Communication
Interface (Optional)
The Symbio™ controllers supports communication with
LonTalk® open protocol applications. An advanced license
is required to enable this feature. The LonTalk module is
available factory supplied or as a field-installed kit.
BACnet Communications
Interface (Optional)
The Symbio™ controller provides integrated
communication with BACnet® open protocol applications.
An advanced license is required to enable this feature.
When enabled, the following selections are available:
BACnet MS/TP, BACnet IP, or BACnet Zigbee® (Air-Fi®).
V3 System Input Devices and
Functions
High Pressure Control
The high pressure controls are wired in series between the
compressor outputs on the Symbio™ controller and the
compressor contactor coils. If the high pressure control
switch opens, the controller senses a lack of current while
calling for cooling and locks the compressor out.
If four consecutive open conditions occur during an active
call for cooling, the compressor will be locked out, a
diagnostic generated, if applicable, and a manual reset
required to restart the compressor.
Zone Sensors
Manual Changeover (BAYSENS106*)
This sensor features three system switch settings (Heat,
Cool, and Off) and two fan settings (On and Auto). It is a
manual changeover control with single setpoint.
Installation Electrical
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