©2003 American Standard Inc.
FAXA-SVX01B-EN
general
information
About This Manual
Literature Change History
Use this manual for Packaged Fresh Air
units, models FADA and FAHA. This is the
“B” issue of this manual, revised to
include the total energy wheel option. It
provides specific installation, operation,
and maintenance instructions for “BO”
and later design sequences.
These units have modular DDC controls
that provide operating functions signifi-
cantly different than conventional air
conditioning units. Refer to the startup
and test mode procedures within this
manual. Also, reference the Trane
publication,
Packaged Fresh Air Unit
Programming Guide, FAXA-SVP01B-EN.
For units with gas heat, also reference
the
Reznor Installation Form RGM 401
Installation/Operation/Service Manual.
Overview of Manual
This manual describes proper installation,
startup, operation, and maintenance
procedures for the Packaged Fresh Air
unit. Carefully review the information
within this manual and follow the
instructions to minimize risk of improper
operation and/or component damage.
The roof curb specifically designed for the
Packaged Fresh Air unit is available in
14” or 24” height from Trane. The curb
must be mounted on a permanent roof
structure before attempting to install the
unit. Reference the roof curb installation
instructions in the Trane publication,
“Accessory Roof Curb Kit” Installation
Manual, FAXA-SVN01B-EN. Dimensional
data for use with curbs other than Trane,
can be found on pages 15-32
of this
manual.
Note: One copy of this manual ships
inside the control panel of each unit.
It is important that you perform periodic
maintenance to help ensure trouble free
operation. Should equipment failure
occur, contact a qualified Trane service
organization for an experienced HVAC
technician to properly diagnose and
repair this equipment.
Note: Do not release refrigerant to the
atmosphere!
If adding or removing refrigerant, the
service technician must comply with all
federal, state, and local laws.
Warnings and Cautions
WARNING
Warnings indicate potential hazardous
situations, which if not avoided, can cause
death or serious injury.
CAUTION
Cautions indicate a potentially hazardous
situation, which if not avoided, may cause
minor or moderate injury. Also, cautions
may alert against unsafe practices.
CAUTION
Cautions indicate a situation that may
cause equipment or property-damage
only.
Examples follow below.
WARNING
Hazardous voltage!
Disconnect all electrical power
including remote disconnects before
servicing unit. Follow proper lockout/
tagout procedures to ensure power
cannot be inadvertently energized.
Failure to do so can cause death or
serious injury.
CAUTION
Use copper conductors only!
Unit terminals are not designed to
accept other type conductors. Failure
to use copper conductors may cause
equipment damage.
Common HVAC Acronyms
For convenience, a number of acronyms
and abbreviations are used throughout
this manual. These acronyms are
alphabetically listed and defined below.
BAS = building automation systems
cfm = cubic-feet-per-minute
CKT. = circuit
CV = constant volume
CW = clockwise
CCW = counterclockwise
E/A = exhaust air
ECEM = exhaust/comparative enthalpy
module
F/A = fresh air
FAU = fresh air unit
GBAS = generic building automation
system
HI = human interface
I/O = inputs/outputs
IOM= installation/operation/maintenance
manual
IPC = interprocessor communications
LCI = LonTalk™ communication interface
LH = left-hand
MCM = multiple compressor module
MWU = morning warmup
NSB = night setback
O/A = outside air
psig = pounds-per-square-inch, gage
pressure
R/A = return air
RH = right-hand
RPM = revolutions-per-minute
RTM = rooftop module
S/A = supply air
SCM = single circuit module
SZ = single-zone (unit airflow)
TCI = Tracer communications module
UCM = unit control modules
VAV = variable air volume
VCM = ventilation control module
VOM = ventilation override module
ZSM = zone sensor module
Special Note on Refrigeration
Emissions
World environmental scientists have
concluded that ozone in our upper
atmosphere is being reduced due to the
release of CFC fully halogenated
compounds. Trane urges all HVAC
service personnel to make every effort to
prevent any refrigerant emissions while
installing, operating, or servicing
equipment. Always conserve
refrigerants for continued use and follow
all warnings and cautions in this manual.