RT-SVX092A-EN
9
Compressor Nameplate
The nameplate for the compressors are located on the side
of the compressor.
Microchannel Coil Barcode ID
Barcode decal used for coil part identification can be
located on the header and top of coil's inlet/outlet side.
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. For
more details, refer to Integration Guide LonTalk®
Integration to Precedent™ Packaged Rooftop Air-
Conditioners with Symbio™ 700 Controls (BAS-SVP063*-
EN).
BACnet and Modbus
Communications Interface
(Optional)
The Symbio™ controller provides integrated
communication with BACnet® or Modbus™ open protocol
applications. An advanced license is required to enable this
feature. When enabled, the following selections are
available: BACnet MS/TP, BACnet IP, BACnet Zigbee®
(Air-Fi®), Modbus TCP, or Modbus RTU. For more details,
refer to BACnet® and Modbus™ Integration to
Precedent™ Packaged Rooftop Air-Conditioners with
Symbio™ 700 Controls Integration Guide (BAS-SVP062*-
EN).
System Input Devices and
Functions
The Symbio™ 700 controller requires a zone sensor or
thermostat input to operate the unit in a CVZT or VVZT
configuration.
Note: Use of a conventional thermostat will reduce unit
functionality.
The number of available modes depends on the type of
zone sensor or thermostat selected. Descriptions of the
basic input devices used with the Symbio 700 network are
provided to acquaint the operator with the various modules.
Refer to the unit schematic for specific module
connections. The following controls are available from the
factory for field installation.
Supply Fan Failure
Supply fan proving is active when the supply fan is
commanded ON. The supply fan speed must be greater
than 30 rpm for 40 continuous seconds. If the supply fan
speed falls below 30 rpm, supply fan failure diagnostic is
generated, and operation is stopped.
5-Tap Direct Drive Indoor Fan
Standard efficiency, 3 to 5 ton units are equipped with a 5-
speed tap indoor motor.
The motor is factory-wired based on unit configuration:
• Cooling and electric heat units: Wired to operate on
speed tap 1 in the cooling and heating mode
• Gas units: Wired to operate on Speed tap 1 for cooling
mode Speed tap 4 (minimum) for heating mode
A separate tap terminal is provided to change speeds
automatically between heating and cooling modes. The
motor can be rewired for various speed settings as required
for the application. See the wiring diagram shipped with the
unit, and the unit fan performance tables in the catalog.
Clogged Filter Switch (Optional)
The unit mounted clogged filter switch monitors the
pressure differential across the return air filters. It is
mounted in the filter section and is connected to the Fresh
Air Options Module. A diagnostic signal is sent to the
controller if the pressure differential across the filters is at
least 0.5 inch w.c. The contacts will automatically open
when the pressure differential across the filters decreases
to approximately 0.4 inch w.c. The clogged filter output is
energized when the supply fan is operating and the
clogged filter switch has been closed for at least 2 minutes.
The system will continue to operate regardless of the status
of the filter switch. For further details, refer to ACC-
SVN238*-EN.
Note: On units equipped with factory installed MERV 13
filters, a clogged filter switch with different pressure
settings will be installed. This switch will close when
the differential pressure is approximately 0.8 inch
w.c. and open when the differential falls to 0.7 inch w.
c.
Condensate Drain Pan Overflow Switch
A condensate overflow condition will be detected by a
condensate overflow float switch. When the condensate
level reaches the trip point, the diagnostic condition will be
detected. When the condensate overflow input closes for
six continuous seconds, the following actions will be taken
by the Symbio™ 700 controls:
• An auto-reset diagnostic will be generated. All
compressor or heating operations will be disabled
immediately. Condenser fans and compressors will be
de-energized. Supply fan operation will be shutdown.
• Once the overflow condition has been cleared and the
input is open for 6 seconds, all diagnostic conditions
will be cleared. The unit will return to normal operation.
Auto-reset clearing will occur twice each time the unit is
powered up. On the third occurrence, the unit will
initiate a lock-out and require manual reset. If an auto-
reset overflow occurs once, but does not occur again
General Information
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