Trane Horizon OABE Installation and operating instructions

SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing
of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and
training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or
serious injury. When working on the equipment, observe all precautions in the literature and on the tags,
stickers, and labels that are attached to the equipment.
AVERTISSEMENT DE SÉCURITÉ
L’installation et l’entretien de cet équipement doivent être assurés exclusivement par du personnel qualifié.
L’installation, la mise en service et l’entretien d’équipements de chauffage, de ventilation et de climatisation
(CVC) présentent un danger et requièrent des connaissances et une formation spécifiques. Une installation,
un réglage ou une modification inappropriés d’un équipement par une personne non qualifiée peut provoquer
des blessures graves, voire la mort. Lors de toute intervention sur l’équipement, respectez les consignes de
sécurité figurant dans la documentation, ainsi que sur les pictogrammes, autocollants et étiquettes apposés
sur l’équipement.
Installation, Operation,
and Maintenance
Important: Proper execution of the tasks outlined in this Installation, Operation, and Maintenance manual
require and assume the technician has been certified as a start up technician for the Horizon Outdoor
Air unit. This includes working knowledge of the Tracer TU program.
Horizon™ Outdoor Air Unit
Indirect Gas-Fired/Electric Heat and Air Source Heat Pump
Models: OABD, OABE, OAGD, OAGE
November 2019 OAU-SVX02F-EN

© 2019 Ingersoll Rand OAU-SVX02F-EN
Introduction
Read this manual thoroughly before operating or servicing
this unit.
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as
required. Your personal safety and the proper operation of
this machine depend upon the strict observance of these
precautions.
Important Environmental Concerns
Scientific research has shown that certain man-made
chemicals can affect the earth’s naturally occurring
stratospheric ozone layer when released to the
atmosphere. In particular, several of the identified
chemicals that may affect the ozone layer are refrigerants
that contain Chlorine, Fluorine and Carbon (CFCs) and
those containing Hydrogen, Chlorine, Fluorine and
Carbon (HCFCs). Not all refrigerants containing these
compounds have the same potential impact to the
environment. Trane advocates the responsible handling of
all refrigerants-including industry replacements for CFCs
and HCFCs such as saturated or unsaturated HFCs and
HCFCs.
Important Responsible Refrigerant
Practices
Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle
refrigerants must be certified according to local rules. For
the USA, the Federal Clean Air Act (Section 608) sets forth
the requirements for handling, reclaiming, recovering and
recycling of certain refrigerants and the equipment that is
used in these service procedures. In addition, some states
or municipalities may have additional requirements that
must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.
The three types of advisories are defined as follows:
WARNING Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTIONsIndicates a potentially hazardous
situation which, if not avoided, could
result in minor or moderate injury. It
could also be used to alert against
unsafe practices.
NOTICE Indicates a situation that could result in
equipment or property-damage only
accidents.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes.
AVERTISSEMENT
Câblage sur site et mise à la terre corrects
nécessaires !
Le non-respect de la réglementation peut entraîner des
blessures graves, voire mortelles. Il est IMPÉRATIF de
confier l’ensemble du câblage sur site à un électricien
qualifié. Un câblage sur site mal installé ou mal mis à la
terre constitue des risques D’INCENDIE et
D’ÉLECTROCUTION. Pour éviter ces risques, il est
IMPÉRATIF de respecter les obligations en matière de
pose de câblage sur site et de mise à la terre tel que
stipulé dans les règles du NEC et dans les
réglementations électriques locales/nationales.

Introduction
OAU-SVX02F-EN 3
WARNING
Personal Protective Equipment (PPE)
Required!
Failure to wear proper PPE for the job being undertaken
could result in death or serious injury. Technicians, in
order to protect themselves from potential electrical,
mechanical, and chemical hazards, MUST follow
precautions in this manual and on the tags, stickers,
and labels, as well as the instructions below:
• Before installing/servicing this unit, technicians
MUST put on all PPE required for the work being
undertaken (Examples; cut resistant gloves/sleeves,
butyl gloves, safety glasses, hard hat/bump cap, fall
protection, electrical PPE and arc flash clothing).
ALWAYS refer to appropriate Material Safety Data
Sheets (MSDS)/Safety Data Sheets (SDS) and OSHA
guidelines for proper PPE.
• When working with or around hazardous chemicals,
ALWAYS refer to the appropriate MSDS/SDS and
OSHA/GHS (Global Harmonized System of
Classification and Labelling of Chemicals) guidelines
for information on allowable personal exposure
levels, proper respiratory protection and handling
instructions.
• If there is a risk of energized electrical contact, arc, or
flash, technicians MUST put on all PPE in accordance
with OSHA, NFPA 70E, or other country-specific
requirements for arc flash protection, PRIOR to
servicing the unit. NEVER PERFORM ANY
SWITCHING, DISCONNECTING, OR VOLTAGE
TESTING WITHOUT PROPER ELECTRICAL PPE AND
ARC FLASH CLOTHING. ENSURE ELECTRICAL
METERS AND EQUIPMENT ARE PROPERLY RATED
FOR INTENDED VOLTAGE.
AVERTISSEMENT
Équipements de protection individuelle
(EPI) obligatoires !
En cas d’équipement de protection individuelle
inadapté au travail entrepris, les techniciens s’exposent
à des risques de blessures graves voire mortelles. Afin
de se prémunir d’éventuels risques électriques,
mécaniques et chimiques, les techniciens DOIVENT
respecter les consignes préconisées dans le présent
manuel, sur les étiquettes et les autocollants, ainsi que
les instructions suivantes :
• Avant d’installer/réparer cette unité, les techniciens
doivent IMPÉRATIVEMENT porter tout l’équipement
de protection individuelle (EPI) recommandé pour le
travail entrepris (exemples : gants/manchons
résistants aux coupures, gants en caoutchouc butyl,
lunettes de protection, casque de chantier/antichoc,
protection contre les chutes, EPI pour travaux
électriques et vêtementsdeprotection contre les arcs
électriques). Consulter SYSTÉMATIQUEMENT les
fiches de données de sécurité et les directives de
l’OSHA pour connaître la liste des EPI adaptés.
• Lors d’une intervention avec ou à proximité de
produits chimiques dangereux, consulter
SYSTÉMATIQUEMENT les fiches de données de
sécurité appropriées et les directives de l’OSHA/du
SGH (système général harmonisé de classification et
d’étiquetage des produits chimiques) afin d’obtenir
des renseignements sur les niveaux admissibles
d’exposition personnelle, la protection respiratoire
adaptée et les recommandations de manipulation.
• En cas de risque d’éclair, d’arc électrique ou de
contact électrique avec un équipement électrique
sous tension, et AVANT de réparer l’unité, les
techniciens doivent IMPÉRATIVEMENT porter tout
l’équipement de protection individuelle (EPI)
conformément à l’OSHA, à la norme NFPA 70E ou à
toute autre exigence propre au pays pour la
protection contre les arcs électriques. NE JAMAIS
COMMUTER, DÉBRANCHER ou EFFECTUER DE TEST
DE TENSION SANS PORTER UN EPI POUR TRAVAUX
ÉLECTRIQUES OU UN VÊTEMENT DE PROTECTION
APPROPRIÉ CONTRE LES ARCS ÉLECTRIQUES. IL
CONVIENTDES’ASSURERQUELES COMPTEURSET
ÉQUIPEMENTS ÉLECTRIQUES CORRESPONDENT À
LA TENSION NOMINALE PRÉVUE.

Introduction
4OAU-SVX02F-EN
WARNING
Refrigerant under High Pressure!
Failure to follow instructions below could result in an
explosion which could result in death or serious injury
or equipment damage. System contains oil and
refrigerant under high pressure. Recover refrigerant to
relieve pressure before opening the system. See unit
nameplate for refrigerant type. Do not use non-
approved refrigerants, refrigerant substitutes, or
refrigerant additives.
AVERTISSEMENT
Fluide frigorigène sous haute pression !
Tout manquement aux instructions indiquées ci-
dessous peut provoquer une explosion pouvant causer
des blessures graves voire mortelles ou des dommages
matériels. Le système contient de l’huile et du fluide
frigorigène sous haute pression. Avant d’ouvrir le
circuit, récupérez le fluide frigorigène pour éliminer
toute pression dans le circuit. Consultez la plaque
constructeur de l’unité pour connaître le type de fluide
frigorigène employé. Utilisez uniquement des fluides
frigorigènes, substituts et additifs agréés.
WARNING
Hazard of Explosion and Deadly Gases!
Failure to follow all proper safe refrigerant handling
practices could result in death or serious injury.
Never solder, braze or weld on refrigerant lines or any
unit components that are above atmospheric pressure
or where refrigerant may be present. Always remove
refrigerant by following the guidelines established by
the EPA Federal Clean Air Act or other state or local
codes as appropriate. After refrigerant removal, use dry
nitrogen to bring system back to atmospheric pressure
before opening system for repairs. Mixtures of
refrigerants and air under pressure may become
combustible in the presence of an ignition source
leading to an explosion. Excessive heat from soldering,
brazing or welding with refrigerant vapors present can
form highly toxic gases and extremely corrosive acids.
AVERTISSEMENT
Risque d’explosion et gaz mortels !
Le non-respect de toutes les consignes de manipulation
des fluides frigorigènes peut entraîner la mort ou des
blessures graves.
N’effectuez en aucune circonstance des opérations de
brasage ou de soudage sur des conduites de fluide
frigorigène ou des composants de l’unité sous pression
ou pouvant contenir du fluide frigorigène. Récupérez
systématiquement le fluide frigorigène en respectant les
directives de la loi américaine sur la propreté de l’air
(Agence fédérale pour l’environnement) ou toute autre
réglementation nationale ou locale en vigueur. Après la
récupération du fluide frigorigène, utilisez de l’azote
déshydraté pour ramener le système à la pression
atmosphérique avant de l’ouvrir pour procéder aux
réparations. Les mélanges de fluide frigorigène et d’air
sous pression peuvent devenir combustibles en
présence d’une source d’inflammation et provoquer une
explosion. La chaleur excessive découlant de travaux de
soudage ou de brasage associée à la présence de vapeurs
de fluide frigorigène peut entraîner la formation de gaz
hautement toxiques et d’acides extrêmement corrosifs.
WARNING
Follow EHS Policies!
Failure to follow instructions below could result in
death or serious injury.
• All Ingersoll Rand personnel must follow Ingersoll
Rand Environmental, Health and Safety (EHS)
policies when performing work such as hot work,
electrical, fall protection, lockout/tagout, refrigerant
handling, etc. All policies can be found on the BOS
site. Where local regulations are more stringent than
these policies, those regulations supersede these
policies.
• Non-Ingersoll Rand personnel should always follow
local regulations.

Introduction
OAU-SVX02F-EN 5
Copyright
This document and the information in it are the property of
Trane, and may not be used or reproduced in whole or in
part without written permission. Trane reserves the right
to revise this publication at any time, and to make changes
to its content without obligation to notify any person of
such revision or change.
Trademarks
All trademarks referenced in this document are the
trademarks of their respective owners.
Revision History
• Added French language translations of warnings.
• Updated “Installation”, “Startup” and “Unit Weight
and Rigging” chapters.
AVERTISSEMENT
Respecter les politiques EHS !
Lenon-respect des consignes suivantes peut être à
l’origine de blessures graves,voire mortelles.
• Tous les membres du personnel du groupe Ingersoll
Rand sont tenus de respecter les règles établies par
Ingersoll Rand en matière d’environnement,
d’hygiène et de sécurité (EHS) lors d’une
intervention, notamment en cas de travaux à chaud,
de risque d’électrocution et de chute, deprocédures
de verrouillage/mise hors service, de manipulation
de fluide frigorigène, etc. Toutes les politiques sont
disponibles sur le site BOS. Si les réglementations
locales sont plus strictes que les règles imposées par
le groupe, elles deviennent prioritaires.
• Le personnel extérieur au groupe Ingersoll Rand est,
quant à lui, systématiquement tenu d’observer les
réglementations en vigueur à l’échelle locale.
WARNING
Hazard of Explosion and Deadly Gases!
Failure to follow instructions could result in death or
serious injury.
If you smell gas:
1. Open windows.
2. Don’t touch electrical switches.
3. Extinguish any open flame.
4. Immediately call your gas supplier.
AVERTISSEMENT
Risque d’explosion et gaz mortels !
Le non-respect de toutes les consignes de sécurité ci-
dessous peut entraîner la mort ou des blessures graves.
Si vous sentez une odeur de gaz:
1. Ouvrez les fenêtres.
2. Ne touches à aucun interrupteur.
3. Éteignez toute flamme nue.
4. Avertissez immédiatement votre fournisseur de gaz.
WARNING
Hazardous Service Procedures!
Improper installation, adjustment, alteration, service or
maintenance can cause property damage, injury or
death. Read the installation, operating and
maintenance instructions thoroughly before installing
or servicing this equipment.
AVERTISSEMENT
Procédures d’entretien dangereuses !
Une installation, un réglage, une modification, une
réparation ou un entretien incorrect peut entraîner des
dommages matériels, des blessures ou la mort. Lisez
attentivement les instructions d’installation, de
fonctionnement et d’entretien avant de procéder à
l’installation ou à l’entretien de cet équipement.
WARNING
Hazard of Explosion and Deadly Gases
Failure to follow instructions could result in death or
serious injury.
The use and storage of gasoline or other flammable
vapors and liquids in open containers in the vicinity of
this appliance is hazardous.
AVERTISSEMENT
Risque d’explosion et gaz mortels !
Le non-respect de toutes les consignes de sécurité ci-
dessous peut entraîner la mort ou des blessures graves.
Il est dangereux d’utiliser ou d’entreposer de l’essence
ou autres liquides ou vapeurs inflammables dans des
récipients ouverts à proximité de cet appareil.

6OAU-SVX02F-EN
Table of Contents
Model Number Descriptions . . . . . . . . . . . . . . 8
General Information . . . . . . . . . . . . . . . . . . . . 11
Overview of Manual . . . . . . . . . . . . . . . . . 11
Model Number Description . . . . . . . . . . . 11
Unit Nameplate . . . . . . . . . . . . . . . . . . . . 11
Compressor Nameplate . . . . . . . . . . . . . . 11
Unit Description . . . . . . . . . . . . . . . . . . . . 11
Indoor Fan Failure Input . . . . . . . . . . . . . 11
Low Pressure Control ReliaTel Control . 11
Refrigerant Circuits . . . . . . . . . . . . . . . . . 11
High Pressure Control ReliaTel Control . 11
Space Temperature / RH Sensor (Optional)
12
High Temperature Sensor . . . . . . . . . . . . 12
Outdoor Air Temperature and Relative Hu-
midity Sensor . . . . . . . . . . . . . . . . . . . . . . 12
Hot Gas Reheat . . . . . . . . . . . . . . . . . . . . . 12
100 Percent Outdoor Air Hood with Damper
and Filters . . . . . . . . . . . . . . . . . . . . . . . . . 12
Modulating Indirect Gas-Fired Burner . . 12
Through the Base Electrical with Disconnect
Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Through the Base Gas Piping . . . . . . . . . 12
Hinged Access Doors . . . . . . . . . . . . . . . . 12
Electric Heat . . . . . . . . . . . . . . . . . . . . . . . 12
Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . 13
First Aid Measures . . . . . . . . . . . . . . . . . . 13
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Unit Clearances . . . . . . . . . . . . . . . . . . . . 13
Unit Clearances, Curb Dimensions, and Dimen-
sional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
OAB Units . . . . . . . . . . . . . . . . . . . . . . . . . 14
Indirect-Fired OAG Units . . . . . . . . . . . . . 16
Unit Weight and Rigging . . . . . . . . . . . . . . . . 19
Unit Weight . . . . . . . . . . . . . . . . . . . . . . . . 19
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . 22
General Unit Requirements . . . . . . . . . . . 22
OAB and OAG IF Heater Air Inlet Hood and
Flue Assembly Instructions . . . . . . . . . . . .23
Main Electrical Power Requirements . . . .25
Condensate Drain Configuration . . . . . . .25
Hot Water Control Valve Wiring . . . . . . . .25
Chilled Water Connection Size and Location
26
Filter Installation . . . . . . . . . . . . . . . . . . . . .26
Opening the Collapsed Exhaust Damper
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Field Installed Power Wiring . . . . . . . . . . .28
Main Unit Power . . . . . . . . . . . . . . . . . . . . . .29
Standard Wiring . . . . . . . . . . . . . . . . . . . . .29
Voltage Imbalance . . . . . . . . . . . . . . . . . . .30
Electrical Phasing (Three-Phase Motors) .30
Compressor Crankcase Heaters . . . . . . . .31
Main Unit Display and ReliaTel Controls .31
Field-Installed Control Wiring . . . . . . . . . .31
Control Power Transformer . . . . . . . . . . .32
Controls Using 24 Vac . . . . . . . . . . . . . . . .32
Controls Using DC Analog Input/Output
(Standard Low Voltage Multiconductor Wire)
32
DC Conductors . . . . . . . . . . . . . . . . . . . . . . . .33
Factory-Provided Sensors . . . . . . . . . . . . . .33
Pre-Start Check List . . . . . . . . . . . . . . . . . . . . . .34
System Configuration and Pre-Start . . . . . . .35
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Indirect Gas-Fired Heating Startup . . . . . . .38
Startup Procedure . . . . . . . . . . . . . . . . . . .39
Safety Controls . . . . . . . . . . . . . . . . . . . . . .42
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Monthly Maintenance . . . . . . . . . . . . . . . . . .43
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Supply/Return Air Smoke Detector Mainte-
nance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Cooling Season . . . . . . . . . . . . . . . . . . . . .43
Heating Season . . . . . . . . . . . . . . . . . . . . .43
Condenser Coil Cleaning . . . . . . . . . . . . . .43
Final Process . . . . . . . . . . . . . . . . . . . . . . . . . .45

Table of Contents
OAU-SVX02F-EN 7
Performance Data . . . . . . . . . . . . . . . . . . . . . . 47
Superheat and Refrigeration Circuit Data 51
Alarms and Troubleshooting . . . . . . . . . . . . 53
Microprocessor Control . . . . . . . . . . . . . . 53
System Alarms . . . . . . . . . . . . . . . . . . . . . 53
Sensor Failure Alarm Display . . . . . . . . . 53
RTRM Failure Modes . . . . . . . . . . . . . . . . 55
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
OAU Filter Guide . . . . . . . . . . . . . . . . . . . . . 56
Field Installation of Factory-Provided Sensors
57
Horizon™ Dedicated Outdoor Air Unit Startup
Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

8OAU-SVX02F-EN
Model Number Descriptions
Digit 1, 2 — Unit Type
OA = Outdoor Air
Digit 3 — Cabinet Size
B = 500 cfm–3000 cfm
G = 1250 cfm–7500 cfm
Digit 4 — Major Design
Sequence
D = Revision 1
E = Heat Pump
Digit 5, 6, 7 — Normal Gross
Cooling Capacity (MBh)
000 = No Cooling
036 = 3 Tons High Efficiency
048 = 4 Tons High Efficiency
060 = 5 Tons High Efficiency
072 = 6 Tons High Efficiency
084 = 7 Tons High Efficiency
096 = 8 Tons High Efficiency
108 = 9 Tons High Efficiency
120 = 10 Tons High Efficiency
144 = 12 Tons High Efficiency
180 = 15 Tons High Efficiency
210 = 17 Tons High Efficiency
240 = 20 Tons High Efficiency
264 = 22 Tons High Efficiency
300 = 25 Tons High Efficiency
360 = 30 Tons High Efficiency
Digit 8 — Minor Design
Sequence
A = Vertical Discharge/Vertical Return
B = Vertical Discharge/Horizontal
Return
C = Horizontal Discharge/Vertical
Return
D = Horizontal Discharge/Horizontal
Return
E = Vertical Discharge/No Return
F = Horizontal Discharge/No Return
Digit 9 — Voltage Selection
3 = 208-230/60/3
4 = 460/60/3
5 = 575/60/3
Digit 10 — Reserved for Future
Use
Digit 11 — Evaporator Type
0 = No Cooling
C = DX 4-Row Interlaced
D = DX 6-Row Interlaced
F = Glycol/Chilled Water
Digit 12 — Hot Gas Reheat
0=NoHGRH
1 = Fin and Tube Modulating
2 = Fin and Tube On/Off
3 = Microchannel Modulating
4 = Microchannel On/Off
Digit 13 — Compressor
0=NoCompressors
A = Scroll Compressors
B = Digital Scroll (1st Circuit Only)
C = Digital Scroll (1st and 2nd Circuit)
D = Variable Speed Scroll (1st
Circuit Only)
E = Variable Speed Scroll (1st and
2nd Circuit)
F = Scroll Compressors w/Sound
Attenuation Package
G = Digital Scroll (1st Circuit Only)
w/Sound Attenuation Package
H = Digital Scroll (1st and 2nd Circuit)
w/Sound Attenuation Package
J = Variable Speed Scroll (1st Circuit
Only) w/Sound Attenuation
Package
K = Variable Speed Scroll (1st and
2nd Circuit) w/Sound Attenuation
Package
Digit 14 — Condenser
0 = No Condenser
1 = Air-Cooled Fin and Tube
2 = Air-Cooled Fin and Tube
w/Head Pressure On/Off Control
3 = Water-Cooled DX Condenser
Copper/Steel
4 = Air-Cooled Fin and Tube
w/Head Pressure Variable Speed
5 = Air-Cooled Microchannel
6 = Air-Cooled Microchannel
w/Head Pressure On/Off Control
7 = Air-Cooled Microchannel
Variable Speed
8 = Water-Cooled DX Condenser
Copper/Nickel
Digit 15 — Refrigerant Capacity
Control
0 = No RCC Valve
A = RCC Valve on 1st Circuit
B = RCC Valve on 1st and 2nd Circuit
C = ERCC Valve on1st Circuit
D = ERCC Valve on 1st and 2nd Circuit
E = HGBP Valve on 1st Circuit
F = HGBP Valve on 1st and
2nd Circuit
Digit 16 — Indoor Fan Motor
(IFM)
0 = ECM w/Backward Curved
Plenum Fan
2 = Belt Drive
3 = Belt Drive w/VFD
4 = Special Motor Option
Digit 17 — Indoor Fan Wheel
A = 355
B = 450 X 2
C = 12/9 (Single Belt Drive)
D = 12/9 BT (Dual Belt Drive)
Digit 18 — Indoor Fan Motor
(hp)
Digit 19 — Reserved for Future
Use
Digit 20 — Heater Type
(PRI/SEC)
0 = No Heat
A = Indirect-Fired (IF)
B = Direct-Fired (DF)
C = Electric—4-Stage
D = Electric—SCR Modulating
E = Dual Fuel (PRI-IF/SEC-DF)
F = Dual Fuel (PRI-ELEC/SEC-DF)
G = Dual Fuel (PRI-IF/SEC-ELEC)
H = Dual Fuel (PRI-ELEC/SEC-ELEC)
J = Hot Water
K = Steam
L = No Primary Heat,
Secondary ELEC
M = Dual Fuel
(PRI-ELEC-STAGED/SEC-DF)
N = Dual Fuel
(PRI-ELEC-STAGED/SEC-ELEC)
P = Dual Fuel (PRI-HW/SEC-DF)
Q = Dual Fuel (PRI-HW/
SEC-ELEC-SCR)
R = Dual Fuel (PRI-STEAM/SEC-DF)
S = Dual Fuel (PRI-STEAM/SEC-
ELEC-SCR)
Digit 21 — Primary Fuel Type
0 = No Heat
1=NaturalGas
2 = Propane
3 = Electric—Open Coil
4 = Electric—Sheathed Coil
5 = Hot Water
6 = Steam
ECM Belt Drive
A = 1 kW 2 hp
B = 2 kW 3 hp
C = 3 kW 5 hp
D = 4 kW 7.5 hp
E = 10 hp
F = 15 hp

Model Number Descriptions
OAU-SVX02F-EN 9
Digit 22 — Heater Capacity—
Primary Heat Source
Digit 23 — Heat Capacity—
Secondary Heat Source
Digit 24 — Corrosive
Environment Package
0 = No Corrosive Package
1 = S/S Interior, S/S Evap Coil Casing
2 = S/S Interior, Eco-Coated Coils
3 = S/S Interior,
Copper/Copper Evap Coil
4 = S/S Coil Casing
5 = S/S Interior
6 = Eco-Coated Coils
7 = S/S Coil Casing with
Eco-Coated Coils
8 = Copper/Copper Evap, HGRH
Coils
9 = Corrosion Resistant Package
Digit 25, 26 — Unit Controls
00 = Non DDC—Electromechanical
AA = Trane—Discharge Air Control
w/LON Read-Write w/Display
AB = Trane—Space Control w/LON
Read-Write w/Display
AC = Trane—Discharge Air Control
w/BACnet®(No Display)
AD = Trane—Space Control
w/BACnet (No Display)
AF = Trane—Discharge Air Control
w/BACnet w/Display
AG = Trane—Space Control
w/BACnet w/Display
AI = Trane—Discharge Air Control
w/LON Read-Write (No Display)
AJ = Trane—Space Control
w/LON Read-Write (No Display)
AK = Trane—Multi-Zone VAV Control
w/LON Read-Write w/Display
AL = Trane—Multi-Zone VAV Control
w/BACnet w/Display
AM = Trane—Multi-Zone VAV Control
w/LON Read-Write (No Display)
AN = Trane—Multi-Zone VAV Control
w/BACnet (No Display)
AO = Trane—Single-Zone VAV Control
w/LON Read-Write w/Display
AP = Trane—Single-Zone VAV Control
w/BACnet w/Display
AQ = Trane—Single-Zone VAV Control
w/LON Read-Write (No Display)
AR = Trane—Single-Zone VAV Control
w/BACnet (No Display)
XX = Special
Digit 27 — Powered Exhaust Fan
Motor (PFM) and Exhaust
Dampers
0 = No Powered Exhaust
3 = Belt Drive
4 = Belt Drive w/VFD
5 = Special Motor Option
6 = ECM w/Backward Curved
Plenum Fan
7 = ECM w/Backward Curved
Plenum Fan and Barometric
Relief Damper
8 = ECM w/Backward Curved
Plenum Fan and Isolation
Dampers w/End Switch
9 = Barometric Relief Dampers
(No PFM)
Digit 28 — Powered Exhaust Fan
Wheel
0 = No Powered Exhaust
A = 355
B = 450
C = 450 X 2
D = 12/9 BT (single fan-belt drive)
E = 12/9 BT (dual fan-belt drive)
Digit 29 — Powered Exhaust Fan
Motor (hp)
DIGIT 30 — Reserved for Future
Use
Digit 31 — ERV (Requires
Powered Exhaust)
0=NoERV
A = ERV—Composite Construction
w/Bypass
B = ERV—Composite Construction
with Frost Protection w/VFD
C = ERV—Aluminum Construction
w/Bypass
D = ERV—Aluminum Construction
with Frost Protection w/VFD
Digit 32 — ERV Size
0=NoERV
1 = 3014
2 = 3622
3 = 4136
4 = 4634
5 = 5856
Digit 33 — Damper Options
0 = 100% OA 2-Position Damper
1 = 100% OA 2-Position Damper
w/RA 2-Position Damper
2 = Modulating OA and RA Dampers
w/Economizer
Digit 34 — Filtration Options
A = No Filters
B = MERV-8, 30%
C = MERV-13, 80%
D = MERV-14, 95%
E = MERV-8 30%, MERV-13 80%
F = MERV-8 30%, MERV-14 95%
G = MERV-8, 30%, with UVC
H = MERV-13, 80%, with UVC
J = MERV-14, 95%, with UVC
K = MERV-8 30%, MERV-13 80%,
and UVC
L = MERV-8 30%, MERV-14 95%,
and UVC
X = Special Filter Options
Digit 35 — Smoke Detector—
Factory Installed
0 = No Smoke Detector
1 = Supply Smoke Detector
2 = Return Smoke Detector
3 = Supply and Return Smoke
Detectors
IF ELEC HOT WATER
0 = No Heat No Heat No Heat
A = 50 MBh 5 kW 1 Row/10 FPI
B = 75 MBh 10 kW 1 Row/12 FPI
C = 100 MBh 15 kW 1 Row/14 FPI
D = 125 MBh 20 kW 2 Row/10 FPI
E = 150 MBh 24 kW 2 Row/12 FPI
F = 200 MBh 28 kW 2 Row/14 FPI
G = 250 MBh 32 kW 3 Row/10 FPI
H = 300 MBh 40 kW 3 Row/12 FPI
J = 350 MBh 48 kW 3 Row/14 FPI
K = 400 MBh 60 kW
L = 500 MBh 68 kW
M = 600 MBh 79 kW
N = 99 kW
O = 111 kW
P = 119 kW
X = Special Heater Option
ELEC DF
0 = No Heat/No Secondary Heat
A = 5 kW 6 in. Burner—
Up to 330 MBh
B = 10 kW 12 in. Burner—
Up to 400 MBh
C = 15 kW 12 in. Burner—
Up to 600 MBh
D = 20 kW 18 in. Burner—
Up to 400 MBh
E = 24 kW 18 in. Burner—
Up to 900 MBh
F = 28 kW
G = 32 kW
H = 40 kW
J = 48 kW
ECM Belt Drive
0 = No Powered Exhaust
A = 1 kW 2 hp
B = 2 kW 3 hp
C = 3 kW 5 hp
D = 4 kW 7.5 hp
E = 10 hp
F = 15 hp

Model Number Descriptions
10 OAU-SVX02F-EN
Digit 36 — Electrical Options
0 = Terminal Block
A = Non-Fused Disconnect
B = Fused Disconnect Switch
C = Non-Fused Disconnect
w/Convenience Outlet
D = Fused Disconnect Switch
w/Convenience Outlet
E = Dual Point Power
F = Dual Point Power
w/Convenience Outlet
G = 65 SCCR Electrical Rating
w/Non-Fused Disconnect
H = 65 SCCR Electrical Rating
w/Fused Disconnect
J = 65 KAIC Electrical Rating
w/Non-Fused Disconnect
K = 65 KAIC Electrical Rating
w/Fused Disconnect
L = 65 KAIC Non-Fused
w/Convenience Outlet
M = 65 KAIC Fused
w/Convenience Outlet
N = 65 SCCR Non-Fused
w/Convenience Outlet
Digit 37 — Air Flow Monitoring
0 = No Airflow Monitoring
1 = Airflow Monitoring—IFM
Piezo Ring
2 = Airflow Monitoring—PE
Piezo Ring
3 = Airflow Monitoring—Outdoor Air
with Display and IFM
w/Piezo Ring
4 = Airflow Monitoring—IFM
Piezo Ring and PE Piezo Ring
5 = Airflow Monitoring—Outdoor Air
Monitoring w/Display Supply Air
and Exhaust Air w/Piezo Rings
Digit 38 — Accessories
0=NoOptions
A = Hailguards
B = Hailguards and LED Service
Light in Supply Fan Section
D = Hailguards & LED Service Light
in Exhaust Fan Section
E = Hailguards & LED Service Light
in Supply and Exhaust Fan
Section
Digit 39 — Altitude
0 = Sea Level to 1,000 feet
1 = 1,001 to 2,000 feet
2 = 2,001 to 3,000 feet
3 = 3,001 to 4,000 feet
4 = 4,001 to 5,000 feet
5 = 5,001 to 6,000 feet
6 = 6,001 to 7,000 feet
7 = Above 7,000 feet