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RLC-PRC020-EN6
Options
Model RTHD Options
Insulation
All low-temperature surfaces are
covered with 3/4" (19.05 mm) Armaflex II
or equal (K = 0.28) insulation; this
includes the evaporator and water
boxes, suction line, motor housing, and
liquid/vapor separator.
Low-Temperature Evaporator
Addition of an oil cooler to the oil circuit
enables evaporator operation down to
minimum leaving water temperature of
10°F (-12.2°C).
High-Temperature Condenser
Addition of an oil cooler to the oil circuit
enables condenser operation up to
maximum leaving water temperature of
114°F (45.6°C).
Smooth-Bore Condenser Tubes
Smooth-bore copper or premium cupro-
nickel condenser tubes, 3/4" (19.05 mm)
in diameter with .035" (0.889 mm) wall
thickness, are available for high fouling
water applications.
Refrigerant Isolation Valves
Factory-installed condenser inlet and
outlet refrigerant valves allow isolation
of the full refrigerant charge in the
condenser while servicing the chiller.
Marine Water Boxes
Addition of marine water boxes for the
condenser allows tube cleaning without
water pipe interference.
300 psig Evaporator and Condenser
Water Boxes
Water boxes are designed for 300 psig
maximum waterside working pressure,
and grooved pipe water connections are
provided for ease of installation.
Tracer Summit Communications
Link to factory-installed, tested
communication board, via single
twisted-pair wiring, adds Tracer Summit
communications to the system.
LonTalk LCI-C Interface
LonTalk (LCI-C) communications
capabilities are available, with
communication link via single twisted-
pair wiring to factory-installed, tested
communication board.
External Chilled Water Setpoint
External Chilled Water Setpoint is
communicated to a factory-installed,
tested communication board through a
2-10Vdc or 4-20mA signal.
External Current Limiting
External Current Limit Setpoint is
communicated to a factory-installed,
tested communication board through a
2-10Vdc or 4-20mA signal.
External Base Loading
External Base Loading is communicated
to a factory-installed and tested
communication board through a
2-10Vdc or 4-20mA signal.
Ice Making Control
Controls and safeties allow operation
with brine temperatures down to 20°F
(-6.7°C) , and dual setpoints enable both
ice making and daytime comfort cooling.
Programmable Relays
Default-set, factory-installed,
programmable relays allow the operator
to select four relay outputs from a list of
eight. Available relays are: Alarm-
Latching, Alarm-Auto Reset, General
Alarm, Warning, Chiller Limit Mode,
Compressor Running, Head Pressure
Relief Request, and Tracer Control.
Chilled Water Reset – Outdoor Air
Temperature
Controls, sensors, and safeties allow
reset of chilled water temperature, based
on temperature signal, during periods of
low outdoor air temperature. (Chilled
water reset based on return chilled water
temperature is standard.)
Condenser-Regulating Valve Control
Chiller applies a Proportional Integrative
Control (PID) algorithm to control water
regulating valve via 0-10Vdc signal.
Percent of Full Run Load Amps Output
Control system indicates the active
chiller percent of full run load amps,
based on a 0-10Vdc signal.
Condenser Pressure Output
Control system indicates chiller
differential pressure or condenser
pressure, based on a 0-10Vdc signal.
Refrigerant Monitor Input
Control system indicates refrigerant
monitor status of 0-100 or 0-1000 ppm
(user selectable), based on a 2-10Vdc /
4-20 mA signal.
Solid State Starter
Solid State Starter is unit-mounted with
a NEMA 1 gasketed enclosure. To extend
starter life, contactors bypass current
from the silicon control rectifiers (SCRs)
after startup.
Under/Over-Voltage Protection
Unit receives protection against
variations in voltage. (Current lag and
spike protection is standard.)