Trane R Series Installation Operation & Maintenance page 41

RTAC-SVX002A-EN
Installation Electrical
Silver or gold-plated
recommended. These
furnished contacts must be compatible
with 24 VDC, 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 5K15 to
the proper terminals of the LLID 1U4 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. Closure of
the contacts will permit the unit to return
to normal operation.
Field-supplied contacts
voltage connections must be compatible
with dry circuit 24 VDC for a 12
mA resistive load. Refer to the field
diagrams that are shipped with the unit.
External Circuit Lockout – Circuit #1 and
Circuit #2
CH530 provides auxiliary control of a
customer specified or installed contact
closure, for individual operation of either
Circuit #1 or #2. If the contact is closed,
the refrigerant circuit will not operate
1K15 and 1K16.
Upon contact opening, the refrigerant
circuit will run normally. This feature is
used to restrict total chiller operation,
e.g. during emergency
operations.
Connections to 1U5 are shown in the
field diagrams that are shipped with the
unit. These customer-supplied contact
closures must be compatible with 24
VDC, 12 mA resistive load. Silver or
gold plated contacts are recommended.
Ice Building Option
CH530 provides auxiliary control for
a customer specified/installed contact
closure for ice building if so configured
and enabled. This output is known
as the Ice Building Status Relay. The
normally open contact will be closed
when ice building is in progress and
open when ice building has been
normally terminated either through Ice
contacts are Termination setpoint being reached or
customer- removal of the Ice Building command.
This output is for use with the ice
storage system equipment or controls
(provided by others) to signal the
system changes required as the chiller
mode changes from "ice building" to
"ice complete". When contact 5K18 is
provided, the chiller will run normally
when the contact is open.
CH530 will accept either an isolated
contact closure (External Ice Building
command) or a Remote Communicated
input (Tracer) to initiate and command
the Ice Building mode.
CH530 also provides a "Front Panel Ice
Termination Setpoint", settable through
TechView, and adjustable from 20 to
31°F (-6.7 to -0.5°C) in at least 1°F
(1°C) increments.
for all low
NOTE: When in the Ice Building
mode, and the evaporator entering
water temperature drops below the
ice termination setpoint, the chiller
terminates the Ice Building mode and
changes to the Ice Building Complete
Mode.
CAUTION
Evaporator Damage!
Freeze inhibitor must be adequate
for the leaving water temperature.
Failure to do so will result in damage
to system components.
generator
Techview must also be used to enable
or disable Ice Machine Control. This
setting does not prevent the Tracer from
commanding Ice Building mode.
Upon contact closure, the CH530 will
initiate an ice building mode, in which
the unit runs fully loaded at all times.
Ice building shall be terminated either
by opening the contact or based on the
entering evaporator water temperature.
CH530 will not
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