8
SCXF-SVX01Q-EN
Overview
N
No
otte
e:: One copy of this document ships inside the
control panel of each unit and is customer
property. It must be retained by the unit’s
maintenance personnel.
This manual describes proper installation, operation,
and maintenance procedures for air cooled systems. By
carefully reviewing the information within this manual
and following the instructions, the risk of improper
operation and/or component damage will be
minimized. It is important that periodic maintenance be
performed to help assure trouble free operation. A
maintenance schedule is provided at the end of this
manual. Should equipment failure occur, contact a
qualified service organization with qualified,
experienced HVAC technicians to properly diagnose
and repair this equipment.
This manual covers installation, operation and
maintenance of 20-110 ton Signature Series
Commercial Self Contained products with R-410A
refrigerant.
R-410A Compressors
•
Use crank case heaters which must be energized 24
hours prior to compressor start.
•
Contain POE oil which readily absorbs potentially
damaging moisture from air.
•
Control box includes a phase monitor to detect
phase loss, line voltage imbalance and reversal.
Refer to previous IOM versions for R-407C and R-22
units, or contact your local Trane representative.
Refer to the appropriate IOM for air-cooled condenser
CXRC-SVX01*-EN and programming IntelliPak™
controls PKG-SVP01*-EN.
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.
•
A single water point connection.
•
Factory-installed options.
•
An internally trapped drain connection.
N
No
otte
e:: Refer to the following figure 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.
Summary of Contents for IntelliPak SCRF 25
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