50
RLC-SVX09Q-EN
Inputs LLID board. 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 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 to the
External Auto-Stop terminals of the External Auto-Stop and
Emergency Stop Inputs LLID board in 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 for all low 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.
Ice Building Option
The unit controller provides auxiliary control for a customer-
specified or customer-installed contact closure for ice
building if 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 Termination setpoint 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
Ice Making Control contact is provided, the chiller runs
normally when the contact is open.
The unit controller accepts either an isolated contact
closure (External Ice Building command) or a Remote
Communicated input (Tracer
®
) to initiate and command the
Ice Building mode.
The unit controller also provides a Front Panel Ice
Termination Setpoint, settable through Tracer
®
TU, 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 setpoint, the chiller terminates the ice
building mode and changes to the ice building
complete mode.
NOTICE
Equipment Damage!
Failure to follow instructions could result in damage
to system components.
Freeze inhibitor must be adequate for the leaving
water temperature.
Tracer
®
TU must also be used to enable or disable Ice
Machine Control. This setting does not prevent the Tracer
®
from commanding Ice Building mode.
On contact closure, the unit controller will initiate an ice
building mode, in which the unit runs fully loaded at all
times. Ice building is terminated either by opening the
contact or based on the entering evaporator water
temperature. The unit controller does not permit the ice
building mode to be reentered until the unit has been
switched out of ice building mode (open Ice Making Control
contacts) and then switched back into ice building mode
(close Ice Making Control contacts.)
In ice building, all limits (freeze avoidance, evaporator,
condenser, current) will be ignored. All safeties will be
enforced.
If, while in ice building mode, the unit gets down to the
freeze state setting (water or refrigerant), the unit will shut
down on a manually resettable diagnostic, just as in normal
operation.
Connect leads from 5K36 to the proper terminals of 1K8.
Refer to the field diagrams which are shipped with the unit.
Silver or gold-plated contacts are recommended. These
customer-furnished contacts must be compatible with 24
VDC, 12 mA resistive load.
External Chilled or Hot Water Setpoint
(ECWS/EHWS) Option
The unit controller provides inputs that accept either 4 to 20
mA or 2 to 10 VDC signals to set the external chilled water
setpoint (ECWS) when in cooling mode, or external hot
water setpoint (EHWS) when in heating mode. This is not a
reset function. The input defines the setpoint. This input is
primarily used with generic building automation systems
(BAS). The chilled or hot water setpoint is set via the
Tracer
®
AdaptiView™ TD-7 or through digital
communication. The arbitration of the various water
setpoint sources is described in the flow charts at the end
of the section.
The chilled water setpoint may be changed from a remote
location by sending either a 2 to 10 VDC or 4 to 20 mA
signal to the External Demand Limit and Chilled Water
Setpoint Inputs LLID board, terminals 5 and 6 LLID. 2 to 10
VDC and 4 to 20 mA each correspond to:
• ECWS: 10 to 68°F (-12.22 to 20°C)
• EHWS: 77 to 158°F (25 to 70°C)
Note: The Active Hot Water Setpoint max shall not exceed
140°F for R-513A or 167°F for R-515B.
The external chilled water setpoint (ECWS) and external
hot water setpoint (EHWS) minimum and maximum values
are configurable.
Installation - Electrical
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