RLC-SVX02G-E4
50
Installation – Electrical
External Circuit Lockout –
Circuit Number 1 and
Circuit Number 2
The CH.530 provides auxiliary
control of a customer-specified or -
installed contact closure, for
individual operation of either Circuit
Number 1 or Number 2. If the
contact is closed, the refrigerant
circuit will not operate (6S6 and
6S7).
Upon contact opening, the
refrigerant circuit will run normally.
This feature is used to restrict total
chiller operation, e.g., during
emergency generator operations.
External Circuit Lockout will only
function if it is enabled using
TechView.
Connections to (A6-2) are shown in
the field diagrams that are shipped
with the unit.
These customer-supplied contact
closures must be compatible with a
24 V (dc), 12 mA resistive load.
Silver- or gold-plated contacts are
recommended.
Ice-Building Option
The CH.530 provides auxiliary
control for a customer-specified and
-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 the Ice
Termination set point being reached
or 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
(6S55) is provided, the chiller will
run normally when the contact is
open.
CH.530 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.
CH.530 also provides a “Front Panel
Ice-Termination Set Point,” settable
through TechView, and adjustable
from 20 to 31°F [-6.7 to -0.5°C] in at
least 1°F [1°C] increments.
Note: When in the Ice-Building
mode, and the evaporator entering-
water temperature drops below the
ice termination set point, the chiller
terminates the Ice-Building mode
and changes to the Ice-Building-
Complete Mode.
Freeze inhibitor must be adequate
for the leaving-water temperature.
Failure to do so will result in
damage to system components.
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 CH.530
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.
CH.530 will not permit the ice-
building mode to be reentered until
the unit has been switched out of
ice-building mode (open 6S55
contacts) and then switched back
into ice-building mode (close 6S55
contacts.)
In ice building, all limits (freeze
avoidance, evaporator, condenser,
and current) will be ignored. All
safeties will be enforced.
If, while in ice-building mode, the
unit gets down to the freezestat
setting (water or refrigerant), the
unit will shut down on a manually
resettable diagnostic, just as in
normal operation.
Connect leads from (6S55) to the
proper terminals of (A6-3). 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.
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