Carrier 30XW325-400 Options and accessories cont, Field-supplied and field-installed insulation

Options and accessories (cont)

temperature sensor to facilitate operating in HEAT mode. Heat machine units require 300 psig (2068 kPa) option and field-installed thermal insulation on the compressor discharge piping and waterbox heads because of high temperature.

One-pass condenser provides a lower pressure drop through the condenser for applications with low delta T (temperature) or high flow or where the condensers are piped in a series. The one-pass condenser option is only available with flanged connections and with a discharge end leaving water connection.

Wye-delta start is an alternate starting method which reduces the inrush current when starting the compressor. Wye delta start is standard on 208-v, and 230-v units, optional for 380-v, 460-v, and 575-v.

Dual point power provides a means for connecting two sources of power to dual compressor 30XW chillers. One source of power is wired to operate the compressor on the A circuit and one source of power is wired to operate the compressor on the B circuit of the chiller.

Non-fused disconnect provides a no load, lockable, through the door handle disconnect for unit power on the chiller. On dual point power, one disconnect is provided for each of the two main power supplies. This disconnect does not remove the control circuit from power supply.

Control transformer is sized to supply the needs of the control circuit from the main power supply.

115-v GFCI convenience outlet includes 4 amp GFI (ground fault interrupt) receptacle. Convenience outlet is 115-v female receptacle. Not available with 380-v units.

Nitrogen charge provides a 15 lb (6.8 kg) charge of nitrogen instead of a full factory charge of R-134a refrig- erant to keep the chiller refrigerant circuit dry during ship- ment. This option is recommended for applications where the unit will be disassembled prior to installation. Units shipped with a nitrogen charge will receive an electrical continuity test at the factory prior to shipment.

Crate for shipment provides a wooden crate around the chiller. The chiller is bagged prior to being placed in the crate. This option is recommended for export orders.

Suction service valves allow for further isolation of the compressor from the evaporator vessel.

BACnet™ translator control provides an interface between the chiller and BACnet Local Area Network (LAN, i.e., MS/TP EIA 485). The BACnet translator con- trol is also available as a factory-installed option.

LON translator control provides an interface between the chiller and Local Operating Network (LON, i.e., LON- Works FT-10A ANSI/EIA-709.1). The LON translator control is also available as a factory-installed option.

Energy management module provides energy manage- ment capabilities to minimize chiller energy consumption. Several features are provided with this module including leaving fluid temperature reset, cooling set point reset or demand limit control from a 4 to 20 mA signal, 2-point demand limit control (from 0 to 100%) activated by a remote contact closure, and discrete input for "Ice Done" indication for ice stage system interface.

Temperature reset sensor provides temperature reset capability from either the occupied space or outdoor tem- perature sensor.

NOTE: Temperature reset capability using return tempera- ture is standard.

Vibration isolation pads are neoprene pads for installa- tion under the chiller feet at the jobsite.

Vibration springs provide a set of non-siesmic spring isolators for installation at the jobsite.

Navigator™ module provides a portable, hand-held dis- play for convenient access to unit status, operation, config- uration and troubleshooting diagnostics capability. The four-line, 20-character LCD (liquid crystal display) display provides clear language information in English, French, Spanish, or Portuguese. The Navigator module features an industrial grade extension chord and magnets located on the back of the weatherproof enclosure to allow attach- ment to sheet metal components for hands free operation.

Field-supplied and field-installed insulation

Evaporator waterbox insulation must be field installed. When insulating waterboxes, allow for service access and removal of covers. To estimate waterbox cover areas, refer to the following figure.

Insulation for discharge piping between the compres- sor and condenser must be field installed on heat machine units. Refer to the following figure.

Field-installed accessories

Remote enhanced display is a remotely mounted indoor 40-character per line, 16-line display panel for unit monitoring and diagnostics.

Condenser waterbox insulation must be field installed on heat machine units. When insulating waterboxes, allow for service access and removal of covers. To estimate waterbox cover areas, refer to the following figure.

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