Catalogue

RLC-PRC029-EN 137
Options
Non-Fused Disconnect
A non-fused molded case disconnect switch, factory pre-wired with terminal block power
connections and equipped with a lockable external operator handle, is available to disconnect the
chiller from main power.
Dual Point Power Connection
Unit is available with either dual or single point power connections.
Under/Over-Voltage Protection
Unit receives protection against variations in voltage (current lag and spike protection is standard).
Control Options:
A/C Fan Control (RTUD only)
Fan controls are integral to the chiller panel and shall manage the appropriate relays and variable
speed fan outputs to control the differential pressure.
BACnet Interface
BACnet communications capabilities are available, with communication link via single twisted-pair
wiring to communication board.
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). Standard for RTUD units.
Condenser Leaving Water Temperature Control (RTWD only)
Enables the unit to use the leaving condenser water temperature to load and unload the chiller
relative to the leaving condenser water setpoint. The control system allows for a condenser leaving
temperature range of 80°F (26.7°C) to 140°F (60°C) with a water to water heat pump.
Condenser Differential Pressure Output (RTWD only)
Provides a 2–10 Vdc signal based on the system refrigerant differential pressure and time at the
differential with customer defined endpoints.
Condenser Pressure (%HPC) Output (RTWD only)
Provides a 2—10 Vdc output that is a function of percent high pressure cutout for condenser
pressure. The percent high pressure cutout for condenser pressure indication output is based on
the condenser refrigerant pressure transducer(s).
Condenser Water Control Output (RTWD only)
Provides a highly configured signal designed to control a condenser water regulating valve.
External Chilled Water or Hot Water Setpoint
External chilled or hot water setpoint signal can be field wired to a factory-installed, tested
interface board through a 2–10 Vdc or 4–20 mA signal.
External Current-Limiting
External current-limit setpoint is communicated to a factory-installed, tested communication board
through a 2–10 Vdc or 4–20 mA signal.