Installation and Maintenance Manual

Installation - Electrical
108 RLC-SVX09H-EN
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 Option.The relay’s contacts are
isolated Form C (SPDT), suitable for use with 120 VAC
circuits drawing up to 2.8 amps inductive, 7.2 amps
resistive, or 1/3 HP and for 240VAC circuits drawing up to
0.5 amp resistive.
The list of events/states that can be assigned to the
programmable relays can be found in Table 91. The relay
will be energized when the event/state occurs.
Relay Assignments Using TechView
CH530 ServiceTool (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 1A13.
The default assignments for the four available relays of the
RTWD/RTUD Alarm and Status Package Option are:
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
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 control panel.
Note: To prevent control malfunctions, do not run low
voltage wiring (<30 V) in conduit with conductors
carrying more than 30 volts.
Table 91. 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 either 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 either 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 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 (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 later)
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 AHRI 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.
Table 92. 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
WARNING
Proper Field Wiring and Grounding
Required!
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 electrical codes. Failure to
follow code could result in death or serious injury.