RLC-SVX09Q-EN
49
Table 18. Alarm and status relay output configuration (continued)
Alarm
Description
Alarm – General Non Latching Unit
This output is true whenever there is at least a non-latching alarm(s) that targets chiller or circuits or compressors on a
circuit and there are latching or/and non-latching diagnostics that targets chiller, circuits or compressors so that the unit
is unable to produce any capacity.
Alarm – General Latching Ckt1
This output is true whenever there is latching alarm(s) that targets Circuit 1 or all the compressors on Circuit 1 so that
the Circuit 1 is unable to produce any capacity. It means that it activates when there is latching alarm on circuit or
latching alarms on every compressors of circuit.
Alarm – General Non Latching Ckt1
This output is true whenever there is non-latching alarm(s) that targets Circuit 1 or the compressors on Circuit 1 so that
the Circuit 1 is unable to produce any capacity.
Alarm – General Latching Ckt2
This output is true whenever there is latching alarm(s) that targets Circuit 2 or all the compressors on Circuit 2 so that
the Circuit 2 is unable to produce any capacity. It means that it activates when there is latching alarm on circuit or
latching alarms on every compressors of circuit.
Alarm – General Non Latching Ckt2
This output is true whenever there is non-latching alarm(s) that targets Circuit 2 or the compressors on Circuit 2 so that
the Circuit 2 is unable to produce any capacity.
Head Pressure Relief Request
This relay output is energized anytime the chiller or a single circuit on the chiller is running in one of the following
modes: Ice Making Mode, or Condenser Pressure Limit continuously for the duration specified 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 specified by the same Chiller Head
Relief Relay Filter Time.
Relay Assignments
Tracer
®
TU service sool 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 1A13.
The default assignments for the four available relays of the
Alarm and Status Package Option are:
Table 19. Default assignments
Relay Assignment
Relay 1 Terminals J2 -
1,2,3
Evaporator Water Freeze Avoidance Request
Relay 2 Terminals J2 -
4,5,6
Condenser Water Freeze Avoidance Request
Relay 3 Terminals J2 -
7,8,9
Compressor Running
Relay 4 Terminals J2 -
10,11,12
Latching Alarm
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 1A13.
• 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
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury.
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements
for field wiring installation and grounding as
described in NEC and your local/state/national
electrical codes.
Important:
1. 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.
2. To prevent control malfunctions, do not run
low voltage wiring (<30 V) in conduit with
conductors carrying more than 30 volts.
Emergency Stop
The unit controller provides auxiliary control for a customer-
specified or customer-installed latching trip out. When this
customer-furnished remote contact is provided, the chiller
will run normally when the contact is closed. When the
contact opens, the unit will trip on a latching diagnostic.
This latched condition requires either a manual reset at the
front of the control panel or a power cycle of the unit
controller to clear.
Connect low voltage leads to Emergency Stop terminal
strip locations on External Auto-Stop and Emergency Stop
Installation - Electrical
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