Bas Unit Control; Routinely Updating Bas Values; Alarm Reset - Trane Tracer UC600 Installation Manual

BAS Unit Control

The BAS System will control the UC600 by changing specific values, and the following conditions
are all true:
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The following points are the BACnet points that will control the unit:
N N o o t t e e : : Unit configuration will determine which of the following points exist on your unit.
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Routinely Updating BAS Values

The UC600 requires the BAS system to provide a routine update to the sensor values. This
protects against communication loss between the BAS and the UC600. By BACnet definition, the
present value of the object maintains the last value written to it, regardless of the amount of time
that has elapsed since the last write. If communication is lost for several minutes or longer, the
present value of BAS-supplied sensor objects may no longer represent the current state of
environmental conditions. This may result in decreased occupant comfort and damage to
building systems.

Alarm Reset

The UC600 control system monitors the operation of the HVAC equipment. If an abnormal
condition is detected, an event notification message is sent to the Tracer SC. The corresponding
binary input object will change state from inactive to active when the diagnostic or alarm is
detected. The object has been configured to send a BACnet event message to external BACnet
devices as defined by the protocol.
The BAS has the ability to reset internal diagnostics or alarms by controlling the state of a Binary
Value to reset the alarm conditions.
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16
Point is in Service (By default all BAS Points are in service from the factory)
Point is not in a Failed or Faulted condition.
Point is written to at a priority level between 1-16
Discharge Air Cooling Setpoint BAS
Discharge Air Cooling Setpoint Max BAS
Duct Static Pressure Setpoint BAS
Space Temperature Setpoint BAS
Return Air Temperature Setpoint BAS
Fixed Speed Compressor Rotate BAS
Water Side Economizer Lockout BAS
Occupancy Request
Heat Cool Mode Request
Emergency Override BAS
For Compressor alarms, each compressor has a dedicated reset value. Change the state of
the following points from normal to reset to clear the specific compressor alarms. Once the
state has been changed to reset, it will automatically change back to normal, no further action
is needed.
– Compressor 1 Failure Reset (BV 195)
– Compressor 2 Failure Reset (BV 205)
– Compressor 3 Failure Reset (BV 215)
– Compressor 4 Failure Reset (BV 225)
For Fan Failure Alarms, the Supply Fan Failure Reset (BV2) resets all fan failures. Change the
state of the point from normal to reset to clear all fan alarms. Once the state has been
changed to reset, it will automatically change back to normal, no further action is needed.
BAS-SVP042A-EN