49
RLC-SVX02G-E4
Installation – Electrical
Relay Assignments Using
TechView
The CH.530 Service Tool (TechView)
is used to assign any of the above
list of events or status to each of the
four relays provided. The relays to
be programmed are referred to by
the terminal numbers for the relay
on the LLID board (A4-5).
The default assignments for the
four available relays of the RTAC
Alarm and Status Package are:
Table 14– Default Assignments
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
Relay 4
Terminals J2-3,2,1: Chiller Limit
If any of the Alarm and Status
relays are used, provide electrical
power, 115 V or 24V (ac) with a
fused-disconnect switch, to the
panel and wire them through the
appropriate relays (terminals on A4-
3). Provide wiring (switched hot,
neutral, and ground connections) to
the remote annunciation devices.
Do not use power from the control
panel transformer on the chiller to
power these remote devices. Refer
to the field diagrams that 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 V.
Emergency Stop
The CH.530 provides auxiliary
control for a customer-specified and
-installed latching tripout. When this
customer-furnished remote contact
(6S3) is provided, the chiller will run
normally when the contact is
closed. When the contact opens, the
unit will trip off 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 (A6-1).
Refer to the field diagrams that are
shipped with the unit.
Silver- or gold-plated contacts are
recommended. These customer-
furnished contacts must be
compatible with a 24 V (dc), 12 mA
resistive load.
External Auto/Stop
If the unit requires the external
Auto/Stop function, the installer
must provide leads from the remote
contacts (6S1) to the proper
terminals of the (A6-1) on the
control panel.
The chiller will run normally when
the contacts are closed. When either
contact opens, the compressor(s), if
operating, will go to the
RUN:UNLOAD operating mode and
cycle off. Unit operation will be
inhibited. Re-closure of the contacts
will permit the unit to automatically
return to normal operation.
Field-supplied contacts for all low-
voltage connections must be
compatible with dry circuit 24 V (dc)
for a 12 mA resistive load. Refer to
the field diagrams that are shipped
with the unit.
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