RTAC-SVX002A-EN 39
Tab. IV-02 – Pump Relay Operation
Chiller Mode Relay Operation
Alarm - Latching This output is true whenever there is any active diagnostic
that requires a manual reset to clear, that affects either the
Chiller, the Circuit, or any of the Compressors on a circuit. This
classication does not include informational diagnostics.
Alarm - Auto Reset This output is true whenever there is any active diagnostic
that could automatically clear, that affects either the Chiller,
the Circuit, or any of the Compressors on a circuit. This
classication does not include informational diagnostics.
Alarm This output is true whenever there is any diagnostic affecting
any component, whether latching or auto- matically clearing.
This classication does not include informational diagnostics
Alarm Ckt 1 This output is true whenever there is any diagnostic effecting
Refrigerant Circuit 1, whether latching or automatically
clearing, including diagnostics affecting the entire chiller. This
classication does not include informational diagnostics.
Alarm Ckt 2 This output is true whenever there is any diagnostic affecting
Refrigerant Circuit 2 whether latching or automatically
clearing, including diagnostics effecting the entire chiller. This
classication does not include informational diagnostics.
Chiller Limit Mode This output is true whenever the chiller has been running in
one of the Unloading types of limit modes (with a 20 minute
l- (Condenser, Evaporator, Current Limit or Phase Imbalance
Limit) continuously for the last 20 minutes. ter)
Circuit 1 Running This output is true whenever any compressors are running (or
commanded to be running) on Refrigerant
Circuit 2 Running This output is true whenever any compressors are running (or
commanded to be running) on Refrigerant
Chiller Running This output is true whenever any compressors are running (or
commanded to be running) on the chiller and false when no
compressors are commanded to be running on the chiller.
Maximum Capacity
(software or later)
This output is true whenever the chiller has reached maximum
capacity or had reached its 18.0 maximum capacity and since
that time has not fallen below 70% average current relative to
the rated ARI current for the chiller. The output is false when
the chiller falls below 70% average current and, since that time,
had not reestablished maximum capacity.
Relay Assignments Using TechView
CH530 Service Tool (TechView) is used
to install the Alarm and Status Relay
Option package and assign any of the
above list of events or status to each of
the four relays provided with the option.
The relays to be programmed are
referred to by the relay’s terminal
numbers on the LLID board 1U12.
The default assignments for the four
available relays of the RTAC Alarm and
Status Package Option are:
Installation Electrical
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