Trane Tracer TD7 User Manual page 8

Installation Electrical
Table 6. Chiller events/status descriptions
Event/State
Alarm - Latching
Alarm - Auto Reset
Alarm
Warning
Chiller Limit Mode
Compressor Running
Chiller Head Pressure Relief
Request Relay
8
Description
This output is true whenever there is any active diagnostic that requires a manual
reset to clear, that effects the Chiller, the Circuit, or any of the Compressors on a
circuit. This classifi cation does not include informational diagnostics.
This output is true whenever there is any active diagnostic that could automatically
clear, that effects the Chiller, the Circuit, or any of the Compressors on a circuit.
This classifi cation does not include informational diagnostics. If all of the auto
resetting diagnostics were to clear, this output would return to a false condition.
This output is true whenever there is any diagnostic effecting any component,
whether latching or automatically clearing. This classifi cation does not include
informational diagnostics.
This output is true whenever there is any informational diagnostic effecting any
component, whether latching or automatically clearing.
This output is true whenever the chiller has been running in one of the Unloading
types of limit modes (Condenser, Evaporator, Current Limit or Phase Imbalance
Limit) continuously for the last 20 minutes. A given limit or overlapping of different
limits must be in effect continuously for 20 minutes prior to the output becoming
true. It will become false, if no Unload limits are present for 1 minute. The fi lter
prevents short duration or transient repetitive limits from indicating. The chiller
is considered to be in a limit mode for the purposes of front panel display and
annunciation, only if it is fully inhibiting loading by virtue of being in either the
"hold" or "forced unload" regions of the limit control, excluding the "limited
loading region". (In previous designs, the "limit load" region of the limit control
was included in the criteria for the limit mode call out on the front panel and
annunciation outputs)
The output is true whenever any compressors are started or running on the
chiller and false when no compressors are either starting or running on the chiller.
This status may or may not refl ect the true status of the compressor in Service
Pumpdown if such a mode exists for a particular chiller.
This relay output is energized anytime the chiller is running in one of the following
modes; Ice Making Mode or Condenser Pressure Limit Control Mode continuously
for the duration specifi ed by the Chiller Head Relief Relay Filter Time. The Chiller
Head Relief Relay Filter Time is a service setpoint. The relay output is de-energized
anytime the chiller exits all above modes continuously for the duration specifi ed by
the same Chiller Head Relief Relay Filter Time.
RLC-SVU006A-E4