Unit installation

SCXF-SVX01K-EN 9
General Data
Signature Series Self-Contained
Unit Components
Commercial self contained units are complete HVAC
systems used in floor-by-floor applications. Units are easy
to install because they feature a single point power
connection, factory installed and tested controls, single
water point connection, factory installed options, and an
internally trapped drain connection.
See Figure 1, p. 9 and Figure 2, p. 10 for typical unit
components.
The hermetically sealed scroll compressor motors utilize
internal motor protection and time delays to prevent
excessive cycling.
Water-cooled units have 2-6 refrigerant circuits and ship
with a full refrigerant and oil charge. Each circuit includes
filter drier, pressure relief valve, sight glass/moisture
indicator, thermal expansion valve with sensing bulb and
external equalizing line, discharge line schrader valve,
suction line schrader valve and high and low pressure
cutout switches.The water-cooled condensers are shell
and tube type with an internal subcooler. Condensers are
available as mechanically or chemically cleanable.
Air-cooled units have two circuits and ship with oil and a
dry nitrogen holding charge.Therefore, air-cooled units
require field piping refrigerant connections to an air-
cooled condensing unit and charging. Each circuit includes
filter drier (field installed), sight glass/moisture indicator,
thermal expansion valve with sensing bulb and external
equalizing line, discharge line schrader valve, suction line
schrader valve, high and low pressure cutout switches,
discharge line check valve and liquid line solenoid valve.
All units include liquid line service valves for each circuit as
standard (suction and discharge service valves are
optional).
Evaporator fans are double width, double inlet and
forward curved with fixed pitch belt drive assembly.
Variable frequency drives are optional. EISA efficiency
open drip proof (ODP) and totally enclosed fan cooled
(TEFC) motor options are available.
Standard Controls
Standard controls supplied with the unit include the
human interface (HI) panel with unit control module
(UCM). All basic setup parameters are preset from the
factory.
Human Interface Panel
The HI is unit mounted and accessible without opening the
unit’s front panel. It allows easy setpoint adjustment using
the HI keypad. In addition, the HI displays all unit operating
parameters and conditions in a clear language display,
Figure 1. IntelliPak™ commercial self-contained signature series unit components
Waterside economizer
(cleanable option shown)
Sight glasses with
ports for viewing
while unit is running
Unit mounted microprocessor
control with easy-to-read human
interface panel
Swing out VFD panel with
Tri-VFD for efficient VAV
operation
Trane 3-D® Scroll Compressor
for reliability, efficiency and
quiet operation
Two-bolt connection on
cleanable condenser for
quick, easy maintenance
Waterside valve
package option
to enhance system
efficiency
Internally trapped
drain for low cost
installation
2-inch flat filter
box inside unit
casing