Trane Horizon OABE, Horizon Series, Horizon OABD, Horizon OAGD, Horizon OAGE Installation, Operation And Maintenance Manual

Installation, Operation,
and Maintenance

Horizon™ Outdoor Air Unit

Indirect Gas-Fired/Electric Heat and Air Source Heat Pump
Models: OABD, OABE, OAGD, OAGE

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.

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.

November 2019

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.

The three types of advisories are defined as follows:

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.

WARNING

CAUTIONs

NOTICE

Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.

Indicates 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.

Indicates a situation that could result in
equipment or property-damage only
accidents.

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 handli ng of
all refrigerants-including industry replacements for CFCs
and HCFCs such as saturated or unsaturated HFCs and
HCFCs.

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.

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.

© 2019 Ingersoll Rand OAU-SVX02F-EN

Introduction

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 vêtements de protection contre l es 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
CONVIENT DE S’ASSURER QUE LES COMPTEURS ET
ÉQUIPEMENTS ÉLECTRIQUES CORRESPONDENT À
LA TENSION NOMINALE PRÉVUE.

OAU-SVX02F-EN 3

Introduction

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 non­approved refrigerants, refrigerant substitutes, or
refrigerant additives.

AVERTISSEMENT

Fluide frigorigène sous haute pression !

Tout manquement aux instructions indiquées ci­dessous 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.

4 OAU-SVX02F-EN

Introduction

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 ci­dessous 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.

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 ci­dessous 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.

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.

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.

OAU-SVX02F-EN 5

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 Dimen­sional Data

OAB Units . . . . . . . . . . . . . . . . . . . . . . . . . 14

Indirect-Fired OAG Units . . . . . . . . . . . . . 16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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

6 OAU-SVX02F-EN

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

Table of Contents

OAU-SVX02F-EN 7

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=No HGRH
1 = Fin and Tube Modulating
2 = Fin and Tube On/Off
3 = Microchannel Modulating
4 = Microchannel On/Off

Digit 13 — Compressor

0=No Compressors
A = Scroll Compressors
B = Digital Scroll (1
C = Digital Scroll (1
D = Variable Speed Scroll (1

E = Variable Speed Scroll (1

F = Scroll Compressors w/Sound

G = Digital Scroll (1

H = Digital Scroll (1

J = Variable Speed Scroll (1

K = Variable Speed Scroll (1

Circuit Only)

nd

Circuit)

2

Attenuation Package

w/Sound Attenuation Package

w/Sound Attenuation Package

Only) w/Sound Attenuation
Package

nd

Circuit) w/Sound Attenuation

2
Package

st

Circuit Only)

st

and 2nd Circuit)

st

st

and

st

Circuit Only)

st

and 2nd Circuit)

st

Circuit

st

and

Digit 14 — Condenser

0 = No Condenser
1 = Air-Cooled Fin and Tube
2 = Air-Cooled Fin and Tube

3 = Water-Cooled DX Condenser

4 = Air-Cooled Fin and Tube

5 = Air-Cooled Microchannel
6 = Air-Cooled Microchannel

7 = Air-Cooled Microchannel

8 = Water-Cooled DX Condenser

w/Head Pressure On/Off Control

Copper/Steel

w/Head Pressure Variable Speed

w/Head Pressure On/Off Control

Variable Speed

Copper/Nickel

Digit 15 — Refrigerant Capacity
Control

0 = No RCC Valve
A = RCC Valve on 1
B = RCC Valve on 1
C = ERCC Valve on1
D = ERCC Valve on 1
E = HGBP Valve on 1
F = HGBP Valve on 1

nd

2

Circuit

st

Circuit

st

and 2nd Circuit

st

Circuit

st

and 2nd Circuit

st

Circuit

st

and

Digit 16 — Indoor Fan Motor
(IFM)

0 = ECM w/Backward Curved

2 = Belt Drive
3 = Belt Drive w/VFD
4 = Special Motor Option

Plenum Fan

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)

ECM

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

Belt Drive

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=Natural Gas
2 = Propane
3 = Electric—Open Coil
4 = Electric—Sheathed Coil
5 = Hot Water
6 = Steam

8 OAU-SVX02F-EN

Model Number Descriptions

Digit 22 — Heater Capacity—
Primary Heat Source

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

Digit 23 — Heat Capacity—
Secondary Heat Source

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

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

AB = Trane—Space Control w/LON

AC = Trane—Discharge Air Control

AD = Trane—Space Control

AF = Trane—Discharge Air Control

AG = Trane—Space Control

AI = Trane—Discharge Air Control

AJ = Trane—Space Control

AK = Trane—Multi-Zone VAV Control

AL = Trane—Multi-Zone VAV Control

AM = Trane—Multi-Zone VAV Control

AN = Trane—Multi-Zone VAV Control

AO = Trane—Single-Zone VAV Control

AP = Trane—Single-Zone VAV Control

AQ = Trane—Single-Zone VAV Control

AR = Trane—Single-Zone VAV Control

XX = Special

w/LON Read-Write w/Display

Read-Write w/Display

®

w/BACnet

w/BACnet (No Display)

w/BACnet w/Display

w/BACnet w/Display

w/LON Read-Write (No Display)

w/LON Read-Write (No Display)

w/LON Read-Write w/Display

w/BACnet w/Display

w/LON Read-Write (No Display)

w/BACnet (No Display)

w/LON Read-Write w/Display

w/BACnet w/Display

w/LON Read-Write (No Display)

w/BACnet (No Display)

(No Display)

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

7 = ECM w/Backward Curved

8 = ECM w/Backward Curved

9 = Barometric Relief Dampers

Plenum Fan

Plenum Fan and Barometric
Relief Damper

Plenum Fan and Isolation
Dampers w/End Switch

(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)

ECM

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

Belt Drive

DIGIT 30 — Reserved for Future
Use

Digit 31 — ERV (Requires
Powered Exhaust)

0=No ERV
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=No ERV
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

OAU-SVX02F-EN 9

Model Number Descriptions

Digit 36 — Electrical Options

0 = Terminal Block
A = Non-Fused Disconnect
B = Fused Disconnect Switch
C = Non-Fused Disconnect

D = Fused Disconnect Switch

E = Dual Point Power
F = Dual Point Power

G = 65 SCCR Electrical Rating

H = 65 SCCR Electrical Rating

J = 65 KAIC Electrical Rating

K = 65 KAIC Electrical Rating

L = 65 KAIC Non-Fused

M = 65 KAIC Fused

N = 65 SCCR Non-Fused

Digit 37 — Air Flow Monitoring

0 = No Airflow Monitoring
1 = Airflow Monitoring—IFM

2 = Airflow Monitoring—PE

3 = Airflow Monitoring—Outdoor Air

4 = Airflow Monitoring—IFM

5 = Airflow Monitoring—Outdoor Air

Digit 38 — Accessories

0=No Options
A = Hailguards
B = Hailguards and LED Service

D = Hailguards & LED Service Light

E = Hailguards & LED Service Light

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

w/Convenience Outlet

w/Convenience Outlet

w/Convenience Outlet

w/Non-Fused Disconnect

w/Fused Disconnect

w/Non-Fused Disconnect

w/Fused Disconnect

w/Convenience Outlet

w/Convenience Outlet

w/Convenience Outlet

Piezo Ring

Piezo Ring

with Display and IFM

w/Piezo Ring

Piezo Ring and PE Piezo Ring

Monitoring w/Display Supply Air

and Exhaust Air w/Piezo Rings

Light in Supply Fan Section

in Exhaust Fan Section

in Supply and Exhaust Fan

Section

10 OAU-SVX02F-EN

General Information

Overview of Manual

Note: 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 booklet 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 techn icians
to properly diagnose and repair this equipment.

Model Number Description

All products are identified by a multiple-character model
number that precisely identifies a particular type of unit.
An explanation of the alphanumeric identification code is
provided (see Model Number chapter). Its use will enable
the owner/operator, installing contractors, and service
engineers to define the operation, specific components,
and other options for any specific unit.

When ordering replacement parts or requesting service,
be sure to refer to the specific model number and serial
number printed on the unit nameplate.

Unit Nameplate

A Mylar® unit nameplate is located on the unit’s corner
support next to the control box. It includes the unit model
number, serial number, electrical characteristics,
refrigerant charge, as well as other pertinent unit data.

receive information from sensors and customer binary
contacts to satisfy the applicable request for ventilation,
cooling, dehumidification and heating.

Indoor Fan Failure Input

The Indoor Fan Failure Switch (IFFS) is connected to verify
indoor fan operation.

When there is a call for the indoor fan to be energized, the
differential pressure switch, connected to the Main Unit
Display, must prove airflow within 60 seconds or the Main
Unit Display will shut off all mechanical operations, lock
the system out and send a diagnostic alarm to the Unit
Display. The system will remain locked out until a reset is
initiated through the MCM via the Alarm Reset Function on
the Unit Display.

Low Pressure Control ReliaTel Control

This input incorporates the compressor low pressure
control (CLP 1) for the refrigeration circuit and can be
activated by opening a field supplied contact installed on
the OAUTS.

If this circuit is open before the compressor is started, the
ReliaTel™ control will not allow the affected compressor to
operate. Anytime this circuit is opened for 1 continuous
second during compressor operation, the compressor is
immediately turned “Off.” The compressor will not be
allowed to restart for a minimum of 3 minutes should the
contacts close.

If four consecutive open conditions occur during the first
three minutes of operation, the compressor will be locked
out, and a manual reset will be required to restart the
compressor.

Refrigerant Circuits

Compressor Nameplate

The nameplate for the compressors are located on the side
of the compressor.

Unit Description

Before shipment, each unit is leak tested, dehydrated,
charged with refrigerant and compressor oil, and run
tested for proper control operation.

The condenser coils are aluminum fin, mechanically
bonded to copper tubing.

Direct-drive, vertical discharge condenser fans are
provided with built-in thermal overload protection.

The Outdoor Air Unit Main Unit Display and ReliaTel™
Control Module (RTRM) are microelectronic control
systems. The acronym RTRM is extensively throughout
this document when referring to the control system
network.

The Main Unit Display and the RTRM are mounted in the
Main Control Panel. The Main Unit Display and RTRM

OAU-SVX02F-EN 11

For 3–5 ton units, one refrigerant circuit shall incorporate
a standard 4- -row coil. For 6–9 ton units, one refrigerant
circuit shall incorporate a 4 or 6 row coil. For 10–30 ton
units, two refrigerant circuits shall incorporate a 4- or
6-row coil. All circuits shall have thermal expansion valves
(TXVs), service pressure ports, and refrigerant line filter
driers as standard. An area will be provided for
replacement suction line driers. Each refrigerant circuit is
equipped with a factory installed and preset refrigerant
capacity control (RCC) to prevent evaporator coil
temperatures below approximately 38°F (114 lb suction).
The refrigerant capacity device is not installed when the
unit is equipped with a digital scroll.

High Pressure Control ReliaTel Control

The compressor high pressure controls (CHP 1) are wired
in series between the compressor outputs on RTRM1
(CHP 1) and the compressor contactor coils. If one of the
high pressure control switches opens, the RTRM senses a
lack of current while calling for cooling and locks the
compressor out.

General Information

Space Temperature / RH Sensor (Optional)

Field installed, wall mounted temperature and humidity
sensor (BAYSENS036A) to control space cooling, heating
and dew point.

High Temperature Sensor

The Discharge Air Temperature Sensor (DTC) supplies a
continuous signal to the MCM. Factory setting for
Discharge Air Temperature (DTC) Discharge Air
Temperature Setpoint (MDTS) is 90°F (adj 70–100°F), the
unit will be shut down, and require a manual restart if
Discharge Air Temperature exceeds MDTS for 10 minutes
(adj 10–25 minutes). If DAT exceeds Discharge Air High
Temperature Cutoff (DHCS) of 125°F for 10 minutes, the
unit will shut down and require manual restart.

Outdoor Air Temperature and Relative
Humidity Sensor

This factory installed combination outdoor air sensor
located in the outdoor air hood is designed to sense both
outdoor air temperature and relative humidity for use by
the microprocessor controller to make required
ventilation, cooling, dehumidification and heating
decisions. Control Input (Occupied / Unoccupied)

Terminals are provided on the terminal strip labeled
OAUTS for a field installed dry contact or switch closure to
put the unit in the Occupied or Unoccupied modes.

Hot Gas Reheat

This option shall consist of a hot-gas reheat coil located on
the leaving air side of the evaporator.

Through the Base Electrical with
Disconnect Switch

An optional factory installed 3-pole, molded case
disconnect switch with provisions for through the base
electrical connections may be included. The disconnect
switch, with integral overcurrent circuit breaker, will be
installed in the unit in a water tight enclosure with access
through a hinged door. Factory wiring will be provided
from the switch to the unit high voltage terminal block. The
switch will be UL/CSA agency recognized.

Through the Base Gas Piping

The unit will include provisions for installing through the
base gas piping. The factory installed option will have all
piping necessary including an external shutoff piping yoke
with pre-assembled, manual gas shut-off valve, elbows,
and union. The manual shut-off valve will include an 1/8 in.
(3.17 mm) NPT pressure tap. This assembly will require
minor field labor to install.

Hinged Access Doors

Hinged access doors with hold open brackets will be
factory-installed.

Electric Heat

The unit may have four stage or fully modulating SCR
controlled, electric heat. The primary heating section will
include open coil heating elements, automatic and manual
cut-outs, low voltage controls, air proving switch,
maximum 48 amps per circuit and fusing for heaters over
48 amps.

100 Percent Outdoor Air Hood with
Damper and Filters

Factory-installed and -integrated 100 percent outdoor air
hood with damper controlled by a direct coupled actuator.
The unit can be factory provided with an optional
100 percent return air damper controlled by a direct
coupled actuator that is electrically interlocked with the
outdoor air damper.

Modulating Indirect Gas-Fired Burner

The unit will have fully modulating, high turndown,
indirect gas-fired heat. The heating section will include
high turn-down burners and a stainless steel tubular heat
exchanger. The heat exchanger will be constructed of
type 439 stainless steel and be a tubular design capable of
draining internal condensate. External flue to be
constructed of type 430 stainless steel.

Units will be suitable for use with natural gas or Liquid
Propane (LP) gas.

12 OAU-SVX02F-EN

General Information

Unit Inspection

WARNING

Fiberglass Wool!

Product may contain fiberglass wool. Disturbing the
insulation in this product during installation,
maintenance or repair will expose you to airborne
particles of glass wool fibers and ceramic fibers known
to the state of California to cause cancer through
inhalation. Glass wool fibers may also cause
respiratory, skin or eye irritation.

AVERTISSEMENT

Laine de verre !

Le produit peut contenir de la laine de verre. Des
interventions inappropriées sur l’isolation de ce produit
pendant les opérations d’installation, d’entretien ou de
réparation vous exposent à des particules aériennes de
fibres de verre ou de fibres céramiques, responsables
selon la législation américaine (état de Californie) de
risques de cancers par inhalation. Les fibres de verre
peuvent aussi provoquer des phénomènes d’irritation
au niveau du système respiratoire, de la peau ou des
yeux.

As soon as the unit arrives at the job site:

 Verify that the nameplate data matches the data on

the sales order and bill of lading (including electrical
data).

 Verify that the power supply complies with the unit

nameplate specifications.

 Visually inspect the exterior of the unit, including the

roof, for signs of shipping damage.

 Visually inspect the internal components for shipping

damage as soon as possible after delivery and before
it is stored. Do not walk on the sheet metal base pans.

 If concealed damage is discovered, notify the carrier’s

terminal of damage immediately by phone and by
mail. Concealed damage must be reported within
15 days.

Request an immediate joint inspection of the damage
by the carrier and the consignee. Do not remove
damaged material from the receiving location. Take
photos of the damage, if possible. The owner must
provide reasonable evidence that the damage did not
occur after delivery.

 Notify the appropriate sales representative before

installing or repairing a damaged unit.

• Wash clothes separately from other clothing: rinse
washer thoroughly.

• Operations such as sawing, blowing, tear-out, and
spraying may generate fiber concentrations requiring
additional respiratory protection. Use the appropriate
NIOSH approved respiration in these situations.

First Aid Measures

Eye Contact

Flush eyes with water to remove dust. If symptoms persist,
seek medical attention.

Skin Contact

Wash affected areas gently with soap and warm water
after handling.

Storage

Take precautions to prevent condensate from forming
inside the unit’s electrical compartments and motors if:

• the unit is stored before it is installed; or,

• the unit is set on the roof curb, and temporary heat is
provided in the building. Isolate all side panel service
entrances and base pan openings (e.g., conduit holes,
S/A and R/A openings, and flue openings) from the
ambient air until the unit is ready for startup.

Note: Do not use the unit’s heater for temporary heat

without first completing the startup procedure
detailed in “Startup,” p. 38.

The manufacturer will not assume any responsibility for
equipment damage resulting from condensate
accumulation on the unit’s electrical and/or mechanical
components.

Unit Clearances

“Unit Clearances, Curb Dimensions, and Dimensional
Data,” p. 14 contains figures that illustrate the minimum

operating and service clearances for either a single or
multiple unit installation. These clearances are the
minimum distances necessary to assure adequate
serviceability, cataloged unit capacity, and peak operating
efficiency.

Providing less than the recommended clearances may
result in condenser coil starvation, “short-circuiting” of
exhaust or recirculation of hot condenser air.

• Avoid breathing fiberglass dust.

• Use a NIOSH approved dust/mist respirator.

• Avoid contact with the skin or eyes. Wear long-sleeved,
loose-fitting clothing, gloves, and eye protection.

OAU-SVX02F-EN 13

Unit Clearances, Curb Dimensions, and Dimensional

7'-0"

6'-0"

END TO END

3'-0"

4'-0"

4'-0"

3'-0"

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Data

WARNING

Combustible Materials!

Failure to maintain proper clearance between the unit
heat exchanger, vent surfaces and combustible
materials could cause a fire which could result in death
or serious injury or property damage. Refer to unit
nameplate and installation instructions for proper
clearances.

AVERTISSEMENT

Matériaux combustibles !

Tout manquement à l’obligation de maintenir une
distance appropriée entre l’échangeur de chaleur de
l’unité, les surfaces de ventilation et les matériaux
combustibles peut provoquer un incendie pouvant
résulter en des blessures corporelles graves, voire
mortelles, ou des dommages matériels. Reportez-vous
à la plaque signalétique de l’unité et aux instructions
d’installation pour connaître les distances appropriées.

OAB Units

Unit Clearances

Figure 1. Typical installation clearances for OAB unit

Figure 2. Typical installation clearances for OAB unit

with auxiliary cabinet

Note: Certain options require auxiliary cabinet. Refer to

project-specific unit submittals.

Curb Dimensions

Figure 3. Unit curb data for OAB 3–9 tons

14 OAU-SVX02F-EN

Unit Clearances, Curb Dimensions, and Dimensional Data

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auxiliary cabinet

Note: Certain options require auxiliary cabinet. Refer to

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Dimensional Data

Figure 5. Unit dimensional data for OAB 3–9 tons (in.)

Note: Sound attenuation package will add 17.76 in. to the

height of the condenser fan section. Refer to
project-specific unit submittals.

OAU-SVX02F-EN 15

Unit Clearances, Curb Dimensions, and Dimensional Data

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72"

84"

36"

36"

48"

36"

Figure 6. Unit dimensional data for OAB 3–9 tons with

auxiliary cabinet (in.)

Indirect-Fired OAG Units

Unit Clearances

Figure 7. Typical installation clearances for indirect-

fired OAG unit

Note: Certain options require auxiliary cabinet. Refer to

project-specific unit submittals.

Note: Sound attenuation package will add 17.76 in. to the

height of the condenser fan section. Refer to
project-specific unit submittals.

16 OAU-SVX02F-EN

Unit Clearances, Curb Dimensions, and Dimensional Data

72"

84"

36"

48"

36"

36"

S

U

P

P

L

Y

R

ET

U

R

N

4

13

3

55"

4

193"

3

"

" 23

4

3

53"

8

4

3

" 8

4

1

" 70

2

1

"

" 117

2

25

1
2

"

R

E

T

U

R

N

2

441"

84"

3

23

4

4

3

"

"

8

53"

3

8

1655"

1

" 70

2

1

"

" 117

2

3

55"

13

4

3

" 19

4

1

" 25

2

5

" 3

8

3

1
2

"

S

U

PPL

Y

17.250

35.798

ELECTRIC
DISCONNECT

FRONT VIEW

77.524

67.060

74.000

74.417

3.226

NECT

RIGHT SIDE VIEW

121.000 32.573 6.084

6.914

13.039

159.656

22.463

BOTTOM VIEW

17.250

5.125

22.000

24.500

SUPPLY

4.000

19.955

RETURN

11.000

52.000

RETURN

11.000

4.000

54.000
SUPPLY

2.000 THROUGH

BASE ELECTRIC

Figure 8. Typical installation clearances for indirect-

fired OAG unit with auxiliary cabinet

Figure 10. Unit curb data for indirect-fired OAG with

auxiliary cabinet (in.)

Note: Certain options require auxiliary cabinet. Refer to

project-specific unit submittals.

Dimensional Data

Figure 11. Unit dimensional data for indirect-fired OAG

Note: Certain options require auxiliary cabinet. Refer to

project-specific unit submittals.

Curb Dimensions

Figure 9. Unit curb data for indirect-fired OAG (in.)

OAU-SVX02F-EN 17

Unit Clearances, Curb Dimensions, and Dimensional Data

17.250

35.798

ELECTRIC
DISCONNECT

FRONT VIEW

77.524

67.060

74.000

74.417

3.226

6.914

13.039

6.084

17.250

2.000 THROUGH

BASE ELECTRIC

BOTTOM VIEW

5.125

22.000

24.500

SUPPLY

52.072

19.955

RETURN

11.000

52.000

RETURN

11.000

4.000

54.000
SUPPLY

RIGHT SIDE VIEW

121.000 48.072

32.585

3.039

40.595

207.740

169.072

Note: Sound attenuation package will add 10.79 in. to the

height of the condenser fan section. Refer to
project-specific unit submittals.

Figure 12. Unit dimensional data for indirect-fired OAG

with auxiliary cabinet

Note: Certain options require auxiliary cabinet. Refer to

project-specific unit submittals.

Note: Sound attenuation package will add 10.79 in. to the

height of the condenser fan section. Refer to
project-specific unit submittals.

18 OAU-SVX02F-EN

Unit Weight and Rigging

WARNING

Heavy Objects!

Failure to follow instructions below or properly lift unit
could result in unit dropping and possibly crushing
operator/technician which could result in death or
serious injury, and equipment or property-only damage.
Ensure that all the lifting equipment used is properly
rated for the weight of the unit being lifted. Each of the
cables (chains or slings), hooks, and shackles used to
lift the unit must be capable of supporting the entire
weight of the unit. Lifting cables (chains or slings) may
not be of the same length. Adjust as necessary for even
unit lift.

Improper Unit Lift!

Failure to properly lift unit could result in unit dropping
and possibly crushing operator/technician which could
result in death or serious injury, and equipment or
property-only damage. Test lift unit approximately
24 inches to verify proper center of gravity lift point. To
avoid dropping of unit, reposition lifting point if unit is
not level.

WARNING

AVERTISSEMENT

Levage inapproprié de l’unité !

AVERTISSEMENT

Objets lourds !

Le non-respect des instructions ci-dessous ou un levage
inapproprié de l’unité peut provoquer sa chute voire
écraser l’opérateur/le technicien, ce qui peut
occasionner des blessures graves voire mortelles, et
éventuellement endommager l’équipement ou
provoquer des dégâts matériels. Assurez-vous que
l’équipement de levage utilisé est adapté au poids de
l’unité à soulever. Chaque câble (chaîne ou élingue),
crochet ou manille utilisé pour le levage de l’unité doit
être assez robuste pour supporter le poids total de
l’unité. Les câbles, chaînes ou élingues de levage ne
doivent pas être de longueur identique. Procédez au
réglage afin de soulever l’unité de manière équilibrée.

Table 1. Typical unit weight, center of gravity, and corner weights (percentage of total weight) - air cooled DX units

without powered exhaust or ERV

Le non-respect des instructions ci-dessous ou un levage
inapproprié de l’unité peut provoquer sa chute voire
écraser l’opérateur/le technicien, ce qui peut
occasionner des blessures graves voire mortelles, et
éventuellement endommager l’équipement ou
provoquer des dégâts matériels. Faites un test de
levage de l’unité d’environ 60 cm (24 po) afin de vérifier
que le point de levage correspond au centre de gravité
de l’appareil. Pour éviter une chute de celle-ci, ajustez
son point de levage si elle n’est pas à l’horizontale.

Unit Weight

Weight (lb) Center-of-gravity (in.) Corner weight (% of total weight)

Model Number

OAB*036 1255 1736 46.1 24.1 28% 26% 27% 20%
OAB*048 1255 1736 46.6 23.9 30% 24% 28% 18%
OAB*060 1255 1736 45.9 23.9 29% 25% 28% 18%
OAB*072 1255 1736 47.5 23.8 31% 24% 27% 18%
OAB*084 1255 1736 46.5 24.0 29% 25% 28% 19%
OAB*096 1255 1736 46.7 24.1 31% 22% 30% 17%
OAB*108 1255 1736 46.2 24.0 27% 27% 25% 21%
OAG*120 2437 4546 60.2 34.7 29% 24% 26% 21%
OAG*144 2437 4546 59.5 34.9 26% 27% 24% 24%
OAG*180 2437 4546 59.3 34.7 28% 26% 26% 21%
OAG*210 2437 4546 60.7 35.5 26% 26% 24% 24%
OAG*240 2437 4546 59.5 34.6 29% 24% 26% 20%
OAG*264 2437 4546 59.9 34.4 26% 28% 23% 24%
OAG*300 2437 4546 58.8 35.2 28% 24% 27% 20%
OAG*360 2437 4546 58.9 34.2 28% 26% 25% 21%

OAU-SVX02F-EN 19

Min Max Length Width Corner A Corner B Corner C Corner D

Unit Weight and Rigging

Table 2. Typical unit weight, center of gravity, and corner weights (percentage of total weight) - air cooled DX units

with powered exhaust but without ERV

Weight (lb) Center-of-gravity (in.) Corner weight (% of total weight)

Model Number

OAB*036 1608 2352 68.8 24.8 36% 17% 34% 14%
OAB*048 1608 2352 63.6 24.1 32% 22% 32% 14%
OAB*060 1608 2352 65.5 24.3 29% 24% 29% 18%
OAB*072 1608 2352 65.2 24.2 29% 25% 29% 18%
OAB*084 1608 2352 63.0 24.0 22% 32% 23% 23%
OAB*096 1608 2352 65.5 24.3 29% 24% 29% 18%
OAB*108 1608 2352 66.9 24.6 29% 24% 28% 19%
OAG*120 3199 4730 84.4 35.5 26% 26% 24% 24%
OAG*144 3199 4730 83.6 35.3 24% 28% 23% 25%
OAG*180 3199 4730 82.5 35.4 23% 29% 23% 25%
OAG*210 3199 4730 84.0 35.0 24% 29% 21% 26%
OAG*240 3199 4730 83.6 35.3 24% 28% 23% 25%
OAG*264 3199 4730 83.6 35.3 24% 28% 23% 25%
OAG*300 3199 4730 83.6 35.3 24% 28% 23% 25%
OAG*360 3199 4730 83.6 35.3 24% 28% 23% 25%

Min Max Length Width Corner A Corner B Corner C Corner D

Corner Weight

Table 3. Typical unit weight, center of gravity, and corner weights (percentage of total weight) - air cooled DX units

with powered exhaust and ERV

Weight (lb) Center-of-gravity (in.) Corner weight (% of total weight)

Model Number

OAB*036 1740 2526 68.1 24.3 31% 22% 29% 18%
OAB*048 1740 2526 68.9 24.0 31% 23% 27% 19%
OAB*060 1740 2526 67.0 24.1 28% 25% 26% 20%
OAB*072 1740 2526 67.0 24.4 25% 28% 24% 23%
OAB*084 1740 2526 68.3 24.4 28% 26% 25% 22%
OAB*096 1740 2526 67.3 24.2 30% 24% 28% 19%
OAB*108 1740 2526 68.1 24.0 28% 26% 25% 21%
OAG*120 3879 5972 89.4 35.3 28% 24% 23% 25%
OAG*144 3879 5972 84.3 38.8 23% 24% 26% 26%
OAG*180 3879 5972 88.1 35.1 25% 27% 21% 27%
OAG*210 3879 5972 88.2 35.2 31% 22% 26% 21%
OAG*240 3879 5972 87.4 35.2 29% 23% 25% 23%
OAG*264 3879 5972 85.8 35.1 24% 28% 21% 26%
OAG*300 3879 5972 87.0 36.0 27% 24% 24% 25%
OAG*360 3879 5972 87.0 36.0 27% 24% 24% 25%

Min Max Length Width Corner A Corner B Corner C Corner D

20 OAU-SVX02F-EN