10
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.
Field-installed accessories
Remote enhanced display is a remotely mounted
indoor 40-character per line, 16-line display panel for unit
monitoring and diagnostics.
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.
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.
Options and accessories (cont)
