Trane RTAC 140-500 ton units (60 Hz) manual Low Voltage Wiring, Relay Assignments Using TechView

			Installation - Electrical
Table 21	Alarm and Status Relay Output Configuration Table
		Description
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 classification 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 classification 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 fil- (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 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	This output is true whenever the chiller has reached maximum capacity or had reached its maximum
(software 18.0 or	capacity and since that time has not fallen below 70% average current relative to the rated ARI current
later)	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:
		Table 22	Default Assignments
		Relay
		Relay 1 Terminals J2 -12,11,10:		Alarm
		Relay 2 Terminals J2 - 9,8,7:		Chiller Running
		Relay 3 Terminals J2-6,5,4:		Maximum Capacity (software 18.0 or later)
		Relay 4 Terminals J2-3,2,1:		Chiller Limit

If any of the Alarm/Status relays are used, provide electrical power, 115 VAC with fused-disconnect to the panel and wire through the appropriate relays (terminals on 1U12 (EUR=A4-5)). Provide wiring (switched hot, neutral, and ground connections) to the remote annunciation devices. Do not use power from the chiller’s control panel transformer to power these remote devices. Refer to the field diagrams which are shipped with the unit.

Low Voltage Wiring

The remote devices described below require low voltage wiring. All wiring to and from these remote input devices to the Control Panel must be made with shielded, twisted pair conductors. Be sure to ground the shielding only at the panel.

To prevent control malfunctions, do not run low voltage wiring (<30 V) in conduit with conductors carrying more than 30 volts.

Emergency Stop

CH530 provides auxiliary control for a customer specified/installed latching trip out. When this customer-furnished remote contact 5K14 is provided, the chiller will run normally when the contact is closed. When the contact opens, the unit will trip on a manually resettable diagnostic. This condition requires manual reset at the chiller switch on the front of the control panel.

Connect low voltage leads to terminal strip locations on 1U4. Refer to the field diagrams that are shipped with the unit.

RTAC-SVX01F-EN 79