Trane RTAC 170 User Manual

RLC-SVX02G-E4
48
Installation – Electrical
Alarm and Status Relay Outputs (Programmable Relays)
A programmable relay concept provides for enunciation of certain events or states of the chiller, selected from a list
of likely needs, while only using four physical output relays as shown in the field wiring diagram. The four relays are
provided (generally with a Quad Relay Output LLID) as part of the Alarm Relay Output. The relay contacts are
isolated Form C (SPDT), suitable for use with 120 V (ac) circuits drawing up to 2.8 A inductive, 7.2 A resistive, or 240
W and for 240 V (ac) circuits drawing up to 0.5 A resistive.
The list of events or states that can be assigned to the programmable relays follows. The relay will be energized
when the events or state occurs.
Table 13 – Alarm and Status Relay Output Configuration Table
Description
Alarm - Latching
This output is true whenever there is any active diagnostic that requires a manual reset to clear, that affects
the chiller, the circuit, or any of the compressors on a circuit. This classification does not include
informational diagnostics.
Alarm - Auto Reset
This output is true whenever there is any active diagnostic that could automatically clear, that affects the
chiller, the circuit, or any of the compressors on a circuit. This classification does not include informational
diagnostics.
Alarm
This output is true whenever there is any diagnostic affecting any component, whether latching or
automatically clearing. This classification does not include informational diagnostics.
Alarm Circuit 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 classification does not include
informational diagnostics.
Alarm Circuit 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 classification does not include
informational diagnostics.
Chiller Limit Mode
(with a 20 minute filter)
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.
Circuit 1 Running
This output is true whenever any compressors are running (or commanded to be running) on Refrigerant
Circuit 1, and false when no compressors are commanded to be running on that circuit.
Circuit 2 Running
This output is true whenever any compressors are running (or commanded to be running) on Refrigerant
Circuit 2, and false when no compressors are commanded to be running on that circuit.
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 18.0 or higher)
This output is true whenever the chiller has reached maximum capacity or had reached its 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.

Trane RTAC 170 Specifications

General

Brand	Trane
Model	RTAC 170
Category	Chiller
Language	English