Trane OABD, OABE, OADD, OADE, OAGD Catalogue

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Page 1

Product Catalog

Horizon™ Outdoor Air Unit For 100% Outdoor Air Applications

Models: OABD, OABE, OADD, OADE, OAGD, OAKD, OAKE, OAND, OANE

October 2014

OAU-PRC001E-EN

Page 2

Introduction

Standard Direct

Drive w/VFD Plenum

Fan and Slide Out

Service Access

Optional Head

Pressure Control

w/VFD

Microprocessor

Based Control

w/Easy to Read

Human Interface

Standard 6-in. Max

Internal Capacity

Adjustable Filter Rack

w/Dirty Filter Switch

Standard 2-in.

Double Wall R-13

Foam In sulation

2-in. Aluminum Mesh

Filters w/Optional

Outdoor Airflow

Monitoring System

Optional On/Off

Electric Preheat for

ERV Applications

Optional Digital Scroll or

APR Refrigeration

Capacity Controller on

First Circuit

Optional High Turndown

Indirect Gas-Fired

Stainless Steel Heat Exchanger, Modulating SCR Electric Heater, or

Hot Water Coils

Optional

Modulating

Hot Gas

Reheat C oil

Standard 6-Row

Interlaced

Evaporator Coil

w/Stainless Steel

Drain Pan

Optional 2-Position

or Modulating w/Economizer

Return Air Damper

Optional Direct Drive

w/VFD Plenum Fan

Powered Exhaust

w/Gravity Dampers or

Isolation Dampers

Optional Auxiliary Cabinet

for Total-Energy Wheel w/Standard Modulating

Bypass Dampers

The Horizon Outdoor Air Unit...

The Trane DX Horizon™ Outdoor Air Unit for 100 percent outdoor air or dew point design applications leads the industry in:

• Indoor Air Quality (IAQ) Features

• Moisture Management

• High Quality and Durability

• Advanced Controls

Trademarks

Revision History

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 an y person of such revision or change.

All trademarks referenced in this document are the trademarks of their respective owners.

OAU-PRC001E-EN (27 Oct 2014)

• Model number update and inclusion of OAG product information

Page 3

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Model Number Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Horizon Outdoor Air Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Application Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

System Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Horizon OAU Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

OAU with Reheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

OAU Outdoor Air Control without Reheat . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Establishing Capacity Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Cooling & Dehumidification Selection Criteria . . . . . . . . . . . . . . . . . . . . . . . 19

Outdoor Airflow Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Air to Air Energy Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

The Horizon Outdoor Air Unit... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Models: OABD, OAGD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Models: OADD, OADE, OAKD, OAKE, OAND, OANE . . . . . . . . . . . . . . . . . 9

Indoor Air Quality (IAQ) Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Energy Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

High Quality and Durability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Advanced Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Flexibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Enhanced Serviceability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Standard Unit Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Standard Control Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Outdoor Air Unit Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Dehumidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Cooling or Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Dehumidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Cooling or Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Evaporator Design Entering Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Evaporator Design Leaving Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Reheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Discharge Air Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Cooling Setpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Unoccupied Space Humidity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Space Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Controlling the Total-Energy Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Cross Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

OAU-PRC001E-EN 3

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Condensate Drain Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Acoustical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Clearance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Duct Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Controls Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Horizon OAU Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Unit Clearances, Curb Dimensions, and Dimensional Data . . . . . . . . . . . . . . . 44

OAB Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Unit Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Curb Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

OAD Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Unit Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Curb Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Indirect-Fired OAG Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Unit Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Curb Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Direct-Fired OAG Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Unit Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Curb Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

OAK Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Unit Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Curb Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

OAN Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Unit Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Curb Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Indirect Gas-fired Furnace Heater and Power . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Unit Weight and Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Unit Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Corner Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Horizon Outdoor Air Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . 75

Refrigeration and Dehumidification Systems . . . . . . . . . . . . . . . . . . . . . . 75

4 OAU-PRC001E-EN

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Electrical and Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

OAU Filter Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

OAU-PRC001E-EN 5

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Model Number Descriptions

Horizon Outdoor Air Unit

Models: OABD, OAGD

Typical model number (example):

OABD036A4-D1A1A0AB-G1CB0AC3AB-A11B102A0

1 2 3 4 5 6 7 8 9 101112131415161718192021222324252627282930313233343536373839

Digit 1, 2 — Unit Type

OA = Outdoor Air

Digit 3 — Cabinet Size

B = 500–3000 CFM G = 1250–7500 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

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

Circuit Only

Circuit

Circuit Only

and 2nd Circuit

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

Circuit

and 2nd Circuit

Circuit

and 2nd Circuit

Circuit

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 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

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

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

6 OAU-PRC001E-EN

Page 7

Model Number Descriptions

OABD, OAGD Units

Digit 22 — Heater Capacity— Primary Heat Source

IF ELEC

0 = No Heat No Heat A = 50 MBh 5 kW B = 75 MBh 10 kW C = 100 MBh 15 kW D = 125 MBh 20 kW E = 150 MBh 24 kW F = 200 MBh 28 kW G = 250 MBh 32 kW H = 300 MBh 40 kW J = 350 MBh 48 kW 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 300 MBh B = 10 kW 650 MBh C = 15 kW 814 MBh D = 20 kW E = 24 kW F = 28 kW G = 32 kW H = 40 kW J = 48 kW

Digit 24 — Corrosive Environment Package

0 = No Corrosive Package 1 = S/S Cabinet, Basepan,

Eco-Coated Coils 2 = S/S Cabinet, Basepan 3 = S/S Basepan, Eco-Coated Coils 4 = S/S Coil Casing 5 = S/S Interior Casing 6 = Eco-Coated Coils 7 = S/S Coil Casing with

Eco-Coated Coils 8 = Copper/Copper Condenser,

Evap, HGRH Coils

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 VA V Control AP = Trane—Single-Zone VAV Control AQ = Trane—Single-Zone VA V 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 — Pow ered 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 — Pow ered Exhaust Fan Wheel

0 = No Powered Exhaust A = 355 B = 450 X 2 C = 12/9 (single belt drive) D = 12/9 BT (dual belt drive)

Digit 29 — Pow ered 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

B = ERV—Composite Construction C = ERV—Aluminum Construction D = ERV—Aluminum Construction

w/Bypass with Frost Protection w/VFD w/Bypass 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

2 = Modulating OA and RA Dampers

w/RA 2-Position Damper 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%,

L = MERV-8 30%, MERV-14 95%, M = MERV-8 30%, and TCACS

N = MERV-13 80%, and TCACS P = MERV-14 95%, and TCACS Q = MERV-8 30%, MERV-13 80%,

R = MERV-8 30%, MERV-14 95%, X = Special Filter Options

and UVC and UVC

and TCACS and TCACS

OAU-PRC001E-EN 7

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Model Number Descriptions

OABD, OAGD Units

Digit 35 — Smoke Detector— Factory Installed

0=No Smoke Detector 1 = Supply Smoke Detector 2 = Return Smoke Detector 3 = Supply and Return Smoke

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

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 = LED Service Light and

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

Detectors

w/Convenience Outlet

w/Non-Fused Disconnect

w/Fused Disconnect

w/Non-Fused Disconnect

w/Fused Disconnect

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

Hailguards

8 OAU-PRC001E-EN

Page 9

Model Number Descriptions

Models: OADD, OADE, OAKD, OAKE, OAND, OANE

Typical model number (example):

OAKD300A4-D1A1A0GM-G1KB0AC3CJ -A41B102A0

1 2 3 4 5 6 7 8 9 101112131415161718192021222324252627282930313233343536373839

Digit 1, 2 — Unit Type

OA = Outdoor Air

Digit 3 — Cabinet Size

D = 625–4,000 cfm K = 1,500–9,000 cfm N = 3,750–13,500 cfm

Digit 4 — Major Design Sequence

D = Revision 5 E = Heat Pump

Digit 5, 6, 7 — Normal Gross Cooling Capacity (MBh)

000= No Cooling 060= 5 Tons High Efficiency 072= 6 Tons High Efficiency 084= 7 Tons High Efficiency 096= 8 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 420= 35 Tons High Efficiency 480= 40 Tons High Efficiency 540= 45 Tons High Efficiency 600 = 50 Tons High Efficiency 648= 54 Tons High Efficiency

Digit 8 — Minor Design Sequence

A B

Digit 9 — Voltage Selection

1 = 115/60/1 2 = 208-230/60/1 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 A = DX 3-Row B = DX 4-Row C = DX 4-Row Interlaced D = DX 6-Row Interlaced E = DX 8-Row F = Glycol/Chilled Water Coil G = DX 4-Row with

MSP

Technology

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

Circuit Only

Circuit

Circuit Only

and 2nd Circuit

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

Circuit

and 2nd Circuit

Circuit

and 2nd Circuit

Circuit

and

Digit 16 — Indoor Fan Motor (IFM)

0 = Direct Drive w/VFD 1 = Direct Drive (VFD by Others) 2 = Belt Drive 3 = Belt Drive w/VFD 4 = Direct Drive w/Shaft

5 = Special Motor Option

Grounding Ring w/VFD

Digit 17 — Indoor Fan Wheel

A=122 B = 122.6 C=150 D = 150.6 E=165 F = 165.6 G=182 H = 182.6 J=200 K = 200.6 L = 182 X 2 M = 182.6 X 2

Digit 18 — Indoor Fan Motor HP

A = 1/2 hp—1800 rpm B = 1/2 hp—3600 rpm C = 3/4 hp—1800 rpm D = 3/4 hp—3600 rpm E = 1 hp—1800 rpm F = 1 hp—3600 rpm G = 1.5 hp—1800 rpm H = 1.5 hp—3600 rpm J = 2 hp—1800 rpm K = 2 hp—3600 rpm L = 3 hp—1800 rpm M = 3 hp—3600 rpm N = 5 hp—1800 rpm P = 5 hp—3600 rpm R = 7.5 hp—1800 rpm S = 7.5 hp—3600 rpm T = 10 hp—1800 rpm U = 10 hp—3600 rpm V = 15 hp—1800 rpm W = 15 hp—3600 rpm

Digit 19 — Reserved for Future Use

Digit 20 — Heat Type (PRI/SEC)

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

OAU-PRC001E-EN 9

Page 10

Model Number Descriptions

OADD, OADE, OAKD, OAKE, OAND, OANE Units

Digit 22 — Heat Capacity— Primary Heat Source

IF ELEC

0 = No Heat No Heat A = 50 MBh 10 kW B = 75 MBh 20 kW C = 100 MBh 24 kW D = 125 MBh 28 kW E = 150 MBh 32 kW F = 200 MBh 40 kW G = 250 MBh 48 kW H = 300 MBh 60 kW J = 350 MBh 68 kW K = 400 MBh 79 kW L = 500 MBh 99 kW M = 600 MBh 111 kW N = 700 MBh 119 kW P = 800 MBh 139 kW R = 1000 MBh 159 kW S = 179 kW T = 199 kW U = 215 kW X = Special Heater Option

Digit 23 — Heat Capacity— Secondary Heat Source

IF ELEC DF

0 = No Heat/No Secondary Heat A = 50 MBh 10 kW 300 MBh B = 75 MBh 20 kW 600 MBh C = 100 MBh 24 kW 900 MBh D = 125 MBh 28 kW 1200 MBh E = 150 MBh 32 kW F = 200 MBh 40 kW G = 250 MBh 48 kW H = 300 MBh 60 kW J = 350 MBh 68 kW K = 400 MBh 79 kW L = 500 MBh 99 kW M = 600 MBh 111 kW N = 700 MBh 119 kW P = 800 MBh 139 kW R = 1000 MBh 159 kW S = 179 kW T = 199 kW U = 215 kW

Digit 24 — Corrosive Environment Package

0 = No Corrosive Package 1 = S/S Cabinet, Basepan,

2 = S/S Cabinet, Basepan 3 = S/S Basepan, Eco-Coated Coils 4 = S/S Coil Casing 5 = S/S Interior Casing 6 = Eco-Coated Coils 7 = S/S Coil Casing with

8 = Copper/Copper Condens er,

Eco-Coated Coils

Eco-Coated Coils Evap, HGRH Coils

Digit 25, 26 — Unit Controls

00 = Non DDC—Electromechanical AA = Trane—Discharge Air Control

AB = Trane—Space Control 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 VA V Control AP = Trane—Single-Zone VAV Control AQ = Trane—Single-Zone VA V Control AR = Trane—Single-Zone VAV Control

w/LON Read-Write w/Display w/LON 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 — Pow ered Exhaust Fan Motor (PFM) and Exhaust Dampers

0 = No Powered Exhaust 1 = Direct Drive w/VFD and

2 = Direct Drive (VFD by Others) 3 = Belt Drive 4 = Belt Drive w/VFD 5 = Special Motor Option 6 = Direct Drive w/VFD and

7 = Direct Drive w/VFD and 8 = Barometric Relief Dampers

Gravity Dampers

Barometric Relief Damper Isolation Dampers w/End Switch (NO PFM)

Digit 28 — Pow ered Exhaust Fan Wheel

0 = No Powered Exhaust A=122 B = 122.6 C=150 D = 150.6 E=165 F = 165.6 G=182 H = 182.6 J=200 K = 200.6 L = 182 X 2 M = 182.6 X 2

Digit 29 — Pow ered Exhaust Fan Motor (hp)

0 = No Powered Exhaust A = 1/2 hp—1800 rpm B = 1/2 hp—3600 rpm C = 3/4 hp—1800 rpm D = 3/4 hp—3600 rpm E = 1 hp—1800 rpm F = 1 hp—3600 rpm G = 1.5 hp—1800 rpm H = 1.5 hp—3600 rpm J = 2 hp—1800 rpm K = 2 hp—3600 rpm L = 3 hp—1800 rpm M = 3 hp—3600 rpm N = 5 hp—1800 rpm P = 5 hp—3600 rpm R = 7.5 hp—1800 rpm S = 7.5 hp—3600 rpm T = 10 hp—1800 rpm U = 10 hp—3600 rpm V = 15 hp—1800 rpm W = 15 hp—3600 rpm

Digit 30 — Reserved for Future Use

Digit 31 — ERV (Requires Powered Exhaust)

0=No ERV A = ERV—Composite Construction B = ERV—Composite Construction

with Frost Protection w/VFD

C = ERV—Composite Construction

with Bypass

D = ERV—Composite Construction

with Frost Protection and Bypass E = ERV—Aluminum Construction F = ERV—Aluminum Construction

with Frost Protection w/VFD G = ERV—Aluminum Construction

with Bypass H = ERV—Aluminum Construction

with Frost Protection and Bypass

10 OAU-PRC001E-EN

Page 11

Model Number Descriptions

OADD, OADE, OAKD, OAKE, OAND, OANE Units

Digit 32 — ERV Size

0=No ERV 1=3014 2 = 3622 3 = 4136 4 = 4634 5 = 5856 6 = 6488 7 = 6876 8=74122

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 Dampe rs

w/Economizer

Digit 34 — Filtration Options

A = Aluminum Mesh Intake Filters

(ALM) B = MERV-8,30%, and ALM C = MERV-13, 80%, and ALM D = MERV-14, 95%, and ALM E = MERV-8 30%, MERV-13 80%, and

ALM F = MERV-8 30%, MERV-14 95%, and

ALM G = MERV-8, 30%, and ALM, with

UVC H = MERV-13, 80%, and ALM, with

UVC J = MERV-14, 95%, and ALM, with

UVC K = MERV-8 30%, MERV-13 80%,

ALM, and UVC L = MERV-8 30%, MERV-14 95%,

ALM, and UVC M = MERV-8 30%, ALM, and TCACS N = MERV-13 80%, ALM, and TCACS P = MERV-14 95%, ALM, and TCACS Q = MERV-8 30%, MERV-13 80%,

ALM, and TCACS R = MERV-8 30%, MERV-14 95%,

ALM, and TCACS 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

Detector

Digit 36 — Electrical Options

0 = Non-Fused Disconnect A = Fused Disconnect Switch B = Non-Fused Disconnect

w/Convenience Outlet

C = Fused Disconnect Switch

w/Convenience Outlet

D = Dual Point Power

w/Convenience Outlet

F = 65 SCCR Electrical Rating

w/Non-Fused Disconnect

G = 65 SCCR Electrical Rating

w/Fused Disconnect

H = 65 KAIC Electrical Rating

w/Non-Fused Disconnect

J = 65 KAIC Electrical Rating

w/Fused Disconnect

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 = No Options A = Hailguards B = LED Service Light C = Hailguards and 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

OAU-PRC001E-EN 11

Page 12

Features and Benefits

We designed the Horizon™ Outdoor Air Unit based on customer requirements from across the country. Thorough analysis of the performance requirements resulted in a robust design with the ability to effectively operate over an expansive performance envelope required for the year -round treatment of outdoor air.

Also, we took into account today’s HVAC market issues, such as indoor air quality (IAQ). We equipped the Horizon Outdoor Air Unit to meet your ventilation needs—in direct response to the ventilation and humidity control requirements of ASHRAE standard 62.1.

Trane’s Horizon Outdoor Air Unit leads the industry in the key areas of:

• indoor air quality (IAQ)

• energy efficiency

• high quality and durability

• advanced, integrated controls

• flexibility (including indoor installation)

• enhanced serviceability

Indoor Air Quality (IAQ) Features

• Stainless steel drain pan sloped in two directions to ensure proper drainage and reduce the potential for microbial growth

• Double-wall foamed panel construction throughout the indoor section of unit to provide, nonporous, cleanable interior surfaces

• Inlet hood with moisture eliminators

• High efficiency throwaway filter option with standard 2-, 4-, or 6-inch adjustable filter rack

• Piezometer airflow measurement option

• Easy filter access encourages frequent changing

• Refrigerant hot gas reheat for low dewpoint supply air for superior humidity control

• Capable of providing low dew point supply air for superior humidity control

Energy Efficiency

• Total energy wheel option for recovered energy from centralized building exhaust

• Optional modulating recovered refrigerant reheat for unit supply air

High Quality and Durability

• Robust unit construction with 2-inc h do uble wall panels with foam insulat ion for an R-value of 13

• Reversible, hinged access doors

• High quality, long-lasting latches and hinges for all access doors

• Protective standard prepainted finish on cabinet exterior with optional corrosion inhibiting coatings available for the unit exterior, interior and coils

Advanced Controls

• All controls are factory-engineered, mounted, configured and tested to minimize field startup time

•UC600 microprocessor control

• Human interface with touch-pad screen for monitoring, setting, editing and controlling

• Capable of supply-air control or zone control of both temperature and relative humidity

• Occupied and unoccupied control sequences

• Optional remote human interface for ease of control access without going outdoors

• Optional LonTalk building management system or other control systems that support LonTalk

communications interface communication link with a Tracer Summit™

12 OAU-PRC001E-EN

Page 13

Flexibility

Features and Benefits

• Numerous heater options and temperature rise capabilities available

• Multiple roof curb options (1- or 2-inch vibration isolation, horizontal discharge, multiple heights) and seismic certification

• Dual fuel (indirect/electric) option

•Custom colors

Figure 1. Condenser side view of the Trane Horizon™ Outdoor Air Unit

Enhanced Serviceability

• Hinged access doors for ease of maintenance and service

• Easy-open door latches

• Slide out access direct-drive plenum fan

• Optional slide out, self-cleaning total-energy wheel

• Sight glass for each refrigeration circuit

• Optional control display

• High voltage cover

Standard Unit Features

• Multiple cabinet sizes with airflow range from 500 to 13,500 cfm

• Two-inch double-wall, R-13 construction with heavy gauge galvanized metal skin

• Outdoor air inlet hood

• Prepainted exterior finish

• Air-coo led DX refrigeration system

• Completely factory-piped and leak-tested refrigeration system

• Stainless steel drain pans sloped in two planes

• Scroll compressors

• Single-point power connections for units with optional total-energy wheel, powered exhaust, and electric heat

• Filter rack adjustable for 2-, 4-, or 6-inch filters

• Factory-assembled inlet hood with 2-inch mist eliminators (OAD, OAK, OAN)

• Non-fused disconnect switc h

• Type 439 stainless steel heat exchanger

• Low leak parallel blade outdoor air damper with edge seals

• High-efficiency fan motors

• Low ambient operation down to 40°F.

OAU-PRC001E-EN 13

Page 14

Features and Benefits

Standard Control Features

• Fully integrated, factory-installed and commissioned microelectronic controls

• Supply airflow proving

• Emergency stop

• Mechanical refrigeration capacity control (RCC)

• Occupied/unoccupied control modes

• High turn-down (up to 20:1) modulating indirect gas-fired heat

• Clogged filter switch

Optional Features

• Modulating electric heat

•Hot water coils

• Steam heat (future)

• Indirect-fired (all cabinet sizes) and direct-fired (OAB and OAG cabinets) gas heat.

• Low leak parallel blade return air damper with edge seals

• Modulating damper control systems

• Low ambient/head pressure control down to 0°F

• Pleated media filters (2-inch MERV-8, 2-inch MERV-13, 4-inch MERV-14, or a combination 2-inch/4-inch filter)

• 120 V UVC downstream of evaporator coil

• High static fan

• Adjustable powered exhaust

• Exhaust dampers (gravity, barometric relief, and 2-position isolation)

• Fused disconnect switch

• Factory-installed smoke detectors (supply and/or return)

• Integral total-energy wheel

• Protective coatings for the unit and/or coils

• Remote human interface

• Factory or field-wired convenience outlet

• Air source heat pump and water source heat pump

•Hailguards

• LED service lights

• Direct drive BI airfoil plenum fan

• Factory-installed variable frequency drive (VFD)

• Digital scroll compressors on 1

• Variable speed compressors (future)

• Unit mounted human interface panel

and 2nd circuits

14 OAU-PRC001E-EN

Page 15

Application Considerations

Overview

Outdoor Air Unit Functions

The Horizon™ Outdoor Air Unit (OAU) provides conditioned outdoor air suitable for mechanical ventilation or make-up air. The OAU conditions outdoor air as necessary to meet system performance requirements by ventilation with filtration, cooling, dehumidification, and/or heating. The OAU may deliver ventilation air in a number of ways. Refer to “System Configurations,” p. 15 and Figure 5, p. 17, Figure 6, p. 17, and Figure 8, p. 18 for more information.

• V entilation with Filtration

• Cooling

• Dehumidification

•Heating

System Configurations

Dedicated outdoor air systems can deliver conditioned outdoor air in one of the following ways:

1. Conditioned outdoor air supplied directly to each occupied space, with the local terminal unit controlling the space dry-bulb temperature. Refer to Figure 2, p. 15.

2. Conditioned outdoor air supplied directly to local terminal units, or return ducts of lo cal RTUs, which deliver a mixture of the conditioned outdoor air and (conditioned) recirculated air to the space. Refer to Figure 3, p. 16.

3. Conditioned outdoor air supplied directly to a single space to control the space temperature and humidity. F o r example, this application will provide temperature and humidity control of ventilated spaces, such as commercial kitchens or laboratories.

Figure 2 . Direct discharge to conditioned space

OAU-PRC001E-EN 15

Page 16

Application Considerations

Main Condenser

Reheat Coil

Main Evaporator

Expansion Valves

Compressors

Indoor Fan

Figure 3. Indirect discharge to fan-coil units

Horizon OAU Operation

The Horizon™ OAU can use either DX cooling, condenser reheat, electric or gas heat to condition outdoor air. The unit controls modulate cooling and heating capacity, reducing the supply air temperature swings associated with staged heating and cooling.

OAU with Reheat

Dehumidification

16 OAU-PRC001E-EN

Figure 4, p. 16 shows the OAU system with a DX refrigerant circuit design using reheat.

Figure 4. Refrigeration system diagram with reheat

Consider Figure 5, p. 17. If the outdoor air dew point is above the dehumidification setpoint (or in the case of zone control, the zone RH is above the RH setpoint), the OAU will:

• cool the outdoor air to remove required moisture and

• reheat to meet the discharge temperature setpoint.

Page 17

Application Considerations

Dry Bulb Temperature

Dewpoint Temperature

Wet Bulb Temperature

heating

cooling

At h1, 100 percent outdoor air enters the O A U . The OAU filters, cools, and dehumidifies the air as it moves through the evaporator coil. Air leaves the evaporator coil saturated at the preset dew point condition (h3) and is reheated by the reheat coil to the pre-set reheat temperature setpoint (h4). The reheat coil transfers energy to the airstream. A liquid solenoid valve effectively modulates the reheat capacity. The outdoor condenser rejects surplus heat. The reheat circuit is first on and last off, so reheat energy is available at full and part load conditions. Since both the dew point setpoint and discharge temperature setpoint are fully adjustable, the desired supply air conditions are maintained at all load conditions.

Figure 5. Psychrometric chart with dehumidification and reheat

Cooling or Heating

OAU Outdoor Air Control without Reheat

OAU-PRC001E-EN 17

Consider Figure 6, p. 17. If the outdoor air dew point or zone RH is equal to or below the dehumidification setpoint, the O AU will heat or cool the outdoor air to separate cooling or heating setpoints. At t1 or t3, 100 percent outdoor air enters the OAU . The OAU filters, and cools or heats the air as it is drawn through the evaporator and heating section. The air leaves the OAU at the cooling or heating discharge setpoint (t2 or t4).

Figure 6. Psychrometric chart with cooling or heating only

Figure 7, p. 18 shows the Horizon™ OAU DX system, using a refrigerant circuit design without

reheat.

Note: Space control not available without reheat.

Page 18

Application Considerations

Main Condenser

Main Evaporator

Expansion Valves

Compressors

Indoor Fan

Dry Bulb Temperature

Dewpoint Temperature

Wet Bulb Temperature

Dehumidification

Figure 7. Refrigeration system diagram without reheat

Dehumidification

Cooling or Heating

Consider Figure 8, p. 18. If the outdoor air dew point is above the dehumidification setpoint, the OA U will dehumidify the outdoor air. 100 percent outdoor air enters the OAU (h1). The unit filters, cools and dehumidifies the air as it is drawn through the evaporator coils. Air leaves the evaporator coils saturated at a preset dew point setpoint (h3) . Since the dew point setpoint is fully adjustable, the desired dew point condition is maintained at all load conditions.

Figure 8. Psychrometric chart with dehumidification, no reheat

Consider Figure 9, p. 19. If the outdoor air dew point is below the dehumidification setpoint, the OAU will heat or cool the outdoor air to separate cooling or heating setpoints. 1 00 percent outdoor air enters the OAU (t1 or t3). The unit filters and cools or heats the air as it is drawn through the evaporators and heating section. The air leaves the OAU at the cooling or heating setpoint.

18 OAU-PRC001E-EN

Page 19

Figure 9. Psychrometric chart with cooling and heating only

Dry Bulb Temperature

Dewpoint Temperature

Wet Bulb Temperature

heating

cooling

Establishing Capacity Requirements

Determining the OAU capacity requirements requires careful thought. Light Commercial equipment is typically selected based on design sensible conditions. Since latent loads drive the need for the OAU, base the selection on design latent conditions.

Application Considerations

Cooling & Dehumidification Selection Criteria

Evaporator Design Entering Conditions

Evaporator Design Leaving Conditions

OAU-PRC001E-EN 19

For many climates the peak outdoor air enthalpy occurs at a time when the outdoor dry-bulb temperature is not the highest. Refer to the ch apter on climatic design information in the A SHRAE Handbook of Fundamentals. The cooling and dehumidification design condition data is provided three ways:

1. Design dry-bulb temperature with mean coincident wet bulb temperature

2. Design wet-bulb temperature with mean coincident dry-bulb temperature

3. Design dew point temperature with mean coincident dry-bulb temperature

The design wet-bulb condition typically represents a significantly higher ou tdoor air enthalpy than the design dry-bulb condition. Use the condition that represents the highest enthalpy as the entering evaporator selection condition.

Due to the uncertainty of the local terminal unit’s latent capacity at part load, it is usually most straightforward to size the OAU to handle the entire latent load on the system, both indoor and outdoor. With this design approach, the terminal units may do some latent cooling (dehumidification) during periods of higher sensible load. At these times, the space will run slightly drier than the design RH limit. This is why it makes sense to select the OAU to limit the space RH to a maximum allowable level for those conditions when the terminal units are pro viding no space latent cooling, such as 60 percent RH. Using lower humidity limits may result in an unnecessary increase in system operating energy use.

Use Table 1, p. 20, Table 2, p. 20, and Table 3, p. 21 to identify the appropriate supply air dew point for specific design conditions. Fo r a more detailed discussion on determining the selection criteria of a OA U, refer to SYS-APG00 1-EN (Application Guide: Designing Dedicated Outdoor -Air Systems) or SYS-APM004-EN (Applications Engineering Manual: Dehumidific ati on in HVAC Systems).

Page 20

Application Considerations

Reheat

Table 1. Supply air dew point temperature, 75°F at 60 percent RH space limit

Latent Load Btu/h per Person

100 54.6 56.6 57.5 58.1 58.4 58.7 58.9 59.0 59.2 59.2 59.3 120 53.3 55.8 57.0 57.6 58.1 58.4 58.6 58.8 58.9 59.1 59.2 140 52.0 55.0 56.4 57.2 57.7 58.1 58.3 58.6 58.7 58.9 59.0 160 50.6 54.2 55.8 56.7 57.3 57.8 58.1 58.3 58.5 58.7 58.8 180 49.2 53.3 55.2 56.3 57.0 57.4 57.8 58.1 58.3 58.5 58.6 200 47.7 52.5 54.6 55.8 56.6 57.1 57.5 57.8 58.1 58.3 58.4 220 46.1 51.6 54.0 55.3 56.2 56.8 57.2 57.6 57.9 58.1 58.3 240 — 50.6 53.3 54.8 55.8 56.5 57.0 57.3 57.6 57.9 58.1 260 — 49.7 52.7 54.3 55.4 56.1 56.7 57.1 57.4 57.7 57.9 280 — 48.7 52.0 53.8 55.0 55.8 56.4 56.8 57.2 57.5 57.7 300 — 47.7 51.3 53.3 54.6 55.5 56.1 56.6 57.0 57.3 57.5 320 — 46.6 50.6 52.8 54.2 55.1 55.8 56.3 56.7 57.1 57.3 340 — 45.5 49.9 52.3 53.8 54.8 55.5 56.1 56.5 56.8 57.1 360 — — 49.251.753.354.455.255.856.356.657.0 380 — — 48.551.252.954.154.955.556.056.456.8 400 — — 47.750.652.553.754.655.355.856.256.6 420 — — 46.950.152.053.354.355.055.656.056.4 440 — — 46.149.551.653.054.054.755.355.856.2 460 — — 45.348.951.152.653.654.455.155.656.0 480 — — — 48.350.652.253.354.254.855.455.8 500 — — — 47.750.251.853.053.954.655.155.6

Note: Minimum dew point selectable is 45°F.

10 15 20 25 30 35 40 45 50 55 60

cfm per person

Table 2. Supply air dew point temperature, 75°F at 55 percent RH space limit

Latent Load Btu/h per Person

100 51.6 53.8 54.9 55.5 55.9 56.1 56.3 56.5 56.6 56.7 56.8 120 50.2 53.0 54.2 55.0 55.5 55.8 56.1 56.2 56.4 56.5 56.6 140 48.8 52.1 53.6 54.5 55.1 55.5 55.8 56.0 56.2 56.3 56.4 160 47.2 51.2 53.0 54.0 54.6 55.1 55.5 55.7 55.9 56.1 56.2 180 45.6 50.2 52.3 53.5 54.2 54.8 55.2 55.5 55.7 55.9 56.1 200 — 49.3 51.6 53.0 53.8 54.4 54.9 55.2 55.5 55.7 55.9 220 — 48.3 50.9 52.4 53.4 54.1 54.5 54.9 55.2 55.5 55.7 240 — 47.2 50.2 51.9 53.0 53.7 54.2 54.6 55.0 55.2 55.5 260 — 46.2 49.5 51.4 52.5 53.3 53.9 54.4 54.7 55.0 55.3 280 — 45.1 48.8 50.8 52.1 53.0 53.6 54.1 54.5 54.8 55.1 300 — — 48.0 50.2 51.6 52.6 53.3 53.8 54.2 54.6 54.9 320 — — 47.2 49.7 51.2 52.2 53.0 53.5 54.0 54.3 54.6 340 — — 46.4 49.1 50.7 51.8 52.6 53.3 53.7 54.1 54.4 360 — — 45.6 48.5 50.2 51.4 52.3 53.0 53.5 53.9 54.2 380 — — — 47.9 49.8 51.0 52.0 52.7 53.2 53.7 54.0 400 — — — 47.2 49.3 50.6 51.6 52.4 53.0 53.4 53.8 420 — — — 46.6 48.8 50.2 51.3 52.1 52.7 53.2 53.6 440 — — — 46.0 48.3 49.8 50.9 51.8 52.4 53.0 53.4 460 — — — 45.3 47.8 49.4 50.6 51.5 52.2 52.7 53.2 480 — — — — 47.2 49.0 50.2 51.2 51.9 52.5 53.0 500 — — — — 46.7 48.6 49.9 50.9 51.6 52.2 52.7

Note: Minimum dew point selectable is 45°F.

10 15 20 25 30 35 40 45 50 55 60

cfm per person

20 OAU-PRC001E-EN

Page 21

Application Considerations

Table 3. Supply air dew point temperature, 75°F at 50 percent RH space limit

Latent Load Btu/h per Person

100 48.4 50.8 51.9 52.6 53 53.3 53.6 53.8 53.9 54 54.1 120 46.8 49.8 51.3 52.1 52.6 53 53.3 53.5 53.6 53.8 53.9 140 45.2 48.9 50.6 51.5 52.2 52.6 52.9 53.2 53.4 53.5 53.7 160 — 47.9 49.8 51 51.7 52.2 52.6 52.9 53.1 53.3 53.5 180 — 46.8 49.1 50.4 51.3 51.8 52.3 52.6 52.9 53.1 53.3 200 — 45.7 48.4 49.8 50.8 51.5 51.9 52.3 52.6 52.8 53.0 220 — — 47.6 49.3 50.3 51.1 51.6 52 52.3 52.6 52.8 240 — — 46.8 48.7 49.8 50.7 51.3 51.7 52.1 52.4 52.6 260 — — 46 48.149.450.350.951.451.852.152.4 280 — — 45.2 47.4 48.9 49.8 50.6 51.1 51.5 51.9 52.2 300 — — — 46.848.449.450.250.851.351.651.9 320 — — — 46.2 47.9 49 49.8 50.5 51 51.4 51.7 340 — — — 45.547.348.649.550.250.751.151.5 360 — — — — 46.8 48.2 49.1 49.8 50.4 50.9 51.3 380 — — — — 46.3 47.7 48.7 49.5 50.1 50.6 51 400 — — — — 45.7 47.3 48.4 49.2 49.8 50.4 50.8 420 — — — — 45.2 46.8 48 48.9 49.6 50.1 50.6 440 — — — — — 46.3 47.6 48.5 49.3 49.8 50.3 460 — — — — — 45.9 47.2 48.2 49 49.6 50.1 480 — — — — — 45.4 46.8 47.9 48.7 49.3 49.8 500 — — — — — — 46.4 47.5 48.4 49.1 49.6

Note: Minimum dew point selectable is 45°F.

10 15 20 25 30 35 40 45 50 55 60

The Trane OAU utilizes recovered energy from the cooling process to reheat the air leaving the evaporator coil as required to meet the discharge air setpoint. The reheat refrigeration circuit is adequate to deliver enough reheat to supply neutral-temperature air (e.g., 75°F dry-bulb) under most operating conditions. On very low load days, the reheat circuit may not contain enough energy to meet the desired reheat setpoint.

cfm per person

Heating

The OAU has electric, heat pump, hot water, or gas heat options. The electric heat option is available in 0°F–80°F temperature rise offerings with SCR modulation. This means that the lowest temperature rise provided depends only on heater siz e and unit airflow. Calculate the temperature rise to confirm that it provides acceptable contro l. Th e el ectric he at wil l mod ul at e to maintain heating setpoint.

When using hot water heat, the unit controller will modulate a field-provided coil control valve. Provide an ethylene glycol and water mixture or other means of freeze protection for the hot water coil if the OAU will be subject to sub-freezing temperatures.

Capacity Control

The capacity control system on the Horizon™ Outdoor Air Unit is flexible enough to accommodate a variety of system applications. These applications include:

• treating outdoor air to supply a single space or multiple spaces or

• simultaneously meet building make-up air needs while controlling the temperature and relative humidity of a single space.

Each of these applications requires careful consideration to achieve the desired results.

Discharge Air Control

For many multiple spac e, dedicated outdoor air systems, the O AU will continuously supply outdoor air at a dry-bulb setpoint and a dew point that does not exceed its dew point setpoint. Th is control approach is simple because it allows the OAU to function independent of local terminal unit operation or actual space conditions. If the unit selection cri teria is determined using the method suggested in“Establishing Capacity Requirements,” p. 1 9, the Outdoor Air Unit will limit the space relative humidity to the target level.

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Application Considerations

Many dedicated outdoor air systems supply reheated air directly to terminal units or to spaces that have terminal units performing local sens ible cooling. This results in the local terminal units recooling the previously re-heated outdoor air. Reset ting the supply air dry-bulb temperature of the Outdoor Air Unit offers the opportunity to minimize the amount of time re-cooling occurs. Refer to

“Cooling Setpoint,” p. 22 for more information.

Cooling Setpoint

Because the T rane O AU dehumidifies the outdoor air by cooling it, th is cool outdoor air can reduce the sensible cooling load on the local terminal unit. At low space sensible loads, the cool outdoor air may sub-cool the space, causing the local terminal unit to add heat (new energy heat). Therefore, reset occupied Space Cooling Setpoint (SPCS—Space Control Sequence) or Evaporator Cooling Setpoint (ECS—Outdoor Air Contro l Sequence) of the O A U to minimize space sensible recooling so the terminal unit with the lowest sensible load is almost at zero cooling capacity (within the limit of the dew point setpoint). To take full advantage of space demand based dry-bulb reset, you may need to size some of the local terminal units based on neutral outdoor air temperature. This strategy will more effectively manage occupant comfort during seasonal changeover for twopipe terminal unit systems. Because the OAU is not connected to the chiller or boiler plant, accomplish this by resetting the Outdoor Air Unit SPCS or ECS to keep the critical zone at zero heating capacity when the boiler is off and zero cooling capacity when the chiller is off. A Trane Integrated Comfort™ system can provide this control capability.

Unoccupied Space Humidity Control

The Horizon™ O AU pro vides conditioned outdoor air for the ventilation and/or make-up air needs of a building during occupied hours. It can also limit building relative humidity during unoccup ied hours. To do this, provide a return air path to the OAU and place a relative humidity sensor in the space served by the OAU or in a common relief air path (like a return corridor) if the OAU serves multiple spaces. The unit will cycle as required to limit the space humidity to the unoccupied Dewpoint Setpoint (NSDS) setpoint. Reheat and return air damper options are required for this operation. For dedicated outdoor air systems ducted to terminal units, these units must cycle with the operation of the Horizon OA U. A Trane Integrated Comfort™ system can provide this control capability.

Space Control

For single space applications, the Horizon OAU can control space temperature and limit space relative humidity. To do this, size the airflow to meet whichever is the highest: the space loads and ventilation and/or make-up air needs of the application. Install a temperature sensor in the space to provide temperature control and reset the supply air temperature. If reset of the supply air dew point is desired, install a space relative humidity sensor in the space to provide relative humidity limit control.

Outdoor Airflow Balancing

Establish final unit airflow through a field air balancing procedure. Change the fan speed through replacement or fan sheave adjustment (belt drive indoor fan motor) or VFD Setpoint via the UC600 controller (direct drive fan motor).

Air to Air Energy Recovery

Energy recovery can significantly reduce HVAC system first-cost and operating energy costs. You can use recovered energy for two purposes:

1. to temper or reheat supply air for independent control of sensible and latent capacity, or

2. to precondition outdoor air as it enters the building for ventilation.

The Horizon™ OAU offers refrigerant heat recovery for reheating the supply air. To precondition

22 OAU-PRC001E-EN

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the outdoor air, use the optional total-energy wheel to recover energy from building exhaust.

Controlling the Total-Energy Wheel

One way to control an energy recovery device is to turn it on and off with the OAU system exhaust fan. In this case, the total energy wheel enables when the unit is in occupied mode and the exhaust fan is running. While this control method is certainly simple and effective in some applications, it may not provide the expected energy saving benefit, particularly when cold air (vs. neutral air) is supplied to the building.

Another more effective approach is to use the outdoor air dry-bulb to determine when to energize or de-energize the energy recovery device. See Figure 11, p. 23 for an example of this simpli- fied control. In addition to being more effective from a control standpoint, it’s also a very simple control method because the wheel is enabled when all of the following are true:

• unit is in occupied mode,

• exhaust fan is enabled,

• Unit Main Control Module (MCM) calls for unit to operate in dehumidification, cooling, or heating modes, and

• outside air temperature is above the frost protection setpoint (default setpoint 12°F).

If using the O AU to deliver cold, dry conditioned air to th e building (ou tdoor air is cooled to a low dew point but not reheated), use the cooling setpoint control strategy (see “Cooling Setpoint,”

p. 22).

Application Considerations

Figure 10. Dry-bulb control in a cold DB/dry DP application

Figure 11. Dry-bulb control in a neutral DB/dry DP application

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Application Considerations

Cross Leakage

All energy wheels have some cross leakage. Therefore, do not use energy wheels in applications involving toxic or hazardous air streams. The percentage of cross leakage depends on the pressure differentials across the wheel section. With Trane Horizon™ OAU energy wheels, the exhaust air transfer ratios are typically low (less than 4 percent).

Condensate Drain Configuration

OAU units are selected based on dehumidification capability. As such, condensate can form at a high rate. Therefore, the OAU drain pan and condensate line are siz ed and designed accordingly. However, an often-o verlooked element of proper condensate drainage is proper P-T rap and drai n line sizing and installation. An incorrectly-designed and -installed P-Trap can restrict condensate flow or cause water in the condensate drain pan to “spit” or “geyser” which may cause condensate overflow. Carefully install and trap the drain pan to ensure adequate condensate removal under all conditions.

An evaporator condensate drain connection is provided on each unit. For more inform ation, to the Installation, Operation, and Maintenance for your specific product:

• OAU-SVX01*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Indirect Gas-Fired/Electric Heat - Models: OADD, OAKD, OAND)

• OA U-SVX02*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Indirect Gas-Fired/Electric Heat - Model: OABD)

• OA U-SVX003*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Air Source Heat Pump - Models: OADE, OAKE, OANE )

• OAU-SVX005*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Direct Gas-Fired/Electric Heat - Model: OAG)

A condensate trap must be installed at the unit due to the drain connection being on the “negative pressure” side of the fan. Install the P-Trap using the guidelines in Figure 12.

Pitch drain lines connected to P-Trap at least 1/2 inch for every 1 0feet of horizontal run to assure proper condensate flow. Do not allow the horizontal run to sag causing a possible double-trap condition which could result in condensate backup due to “air lock”.

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Figure 12. Condensate trap installation

PANEL ENCLOSURE

D" NPT FEMALE CONNECTOR

CLEANOUT PLUG

D = PIPE DIAMETER H = INTERNAL STATIC PRESSURE (IN W.G.) + 1" J = H * 0.5 L = H + J + D

NOTES: 1. PITCH DRAIN AT LEAST 1/2" PER 10' HORIZ ONTAL RUN

2. CONDENSATE DRAIN PAN WILL NOT DRAIN PROPERLY IF P-TRAP IS NOT PRIMED & OF ADEQUATE HEIGHT TO A

OW FOR CABINETOPERATING NEGATIVE PRESSURE

Application Considerations

Acoustical Considerations

Proper unit placement is critical to reducing transmitted sound levels from the OAU to the building. Therefore, consider acoustic concerns during the design phase and place the unit accordingly. The most economical means of avoiding an acoustical problem is to place the unit(s) away from acoustically critical areas. If possible, do not locate units directly above areas such as: off ices, conference rooms, executive office areas, and classrooms. Instead, ideal locations to consider are: over corridors, utility rooms, toilets, o r oth er areas where hi gh er so un d levels directly below the unit(s) are acceptable.

Follow these basic guidelines for unit placement to minimize sound transmission through the building structure.

1. Never cantilever the compressor side of the unit. A structural cross member or full perimeter roof curb, supported by roof structural members, must support this side of the unit.

2. Locate the unit’s center of gravity close to or over column or main support beam.

3. If the roof structure is very light, replace roof joists by a structural shape in the critical areas described above.

4. If several units are to be placed on one span, stagger them to reduce deflection over that span.

It is impossible to totally quantify the building structure effect on sound transmission because it is dependent on how the roof and building members respond to the O AU’s sound and vibration. However, following the guidelines listed above will help reduce sound transmissions.

Clearance Requirements

Follow the recommended unit clearances to assure adequate serviceability, maximum capacity, and peak operating efficiency . Reducing unit clearances may result in condenser coil starvation or

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Application Considerations

warm condenser air recirculation. If the recommended clearances are not possible on a particular job, consider the following:

• Do the clearances available allow for major service work, such as changing compressors or coils?

• Do the clearances available allow for proper outside air intake, exhaust air removal, and condenser airflow?

• If screening around the unit is used, is there a possibility of air recirculation from the exhaust to the outside air intake or from condenser exhaust to condenser intake.

Review any actual clearances that appear inadequate with your local Trane sales engineer. When two or more units are placed side by side, increase the distance between the units to twice

the recommended single unit clearance. Stagger the units for these two reasons: 1 . T o reduce span deflection if more than one unit is placed on a single span. Reducing deflection

discourages sound transmission.

2. To assure proper exhaust ai r diffusion before contact with the adjacent unit’s outside air intake.

Duct Design

It is important to note that the rated capacities of the OAU can be met only if the unit is properly installed. A well-designed duct system is essential to meet these capacities.

Satisfactory air distri bution throughout the system requires an unrestricted and uniform airflow from the OAU discharge duct.

However, when job conditions dictate installation of elbows near the OAU outlet, using guide vanes may reduce capacity loss and static pressure loss.

Controls Sequence

For sequence of operation, please refer to the Installation, Operation, and Maintenance for your specific product:

• OAU-SVX01*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit -

• OA U-SVX02*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit -

• OA U-SVX003*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Air

• OAU-SVX005*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit -

Indirect Gas-Fired/Electric Heat - Models: OADD, OAKD, OAND)

Indirect Gas-Fired/Electric Heat - Model: OABD)

Source Heat Pump - Models: OADE, OAKE, OANE )

Direct Gas-Fired/Electric Heat - Model: OAG)

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Selection Procedure

Horizon OAU Selection Procedure

The Horizon™ Outdoor Air Unit (OAU) is designed to efficiently dehumidify outdoor air. As such, the selection of an OA U is somewhat more complex than a standard recirculation roof top. T o make it easier, there is an online selection tool provided. Before launching the program, the following information about the specific project will be required:

1. Entering Air Temperature (DB/WB) a. Summer b. Winter

2. Ambient Temperature

3. CFM a. Total CFM b. Outdoor Air CFM

4. External Static Pressure

5. Altitude

6. Electrical Voltage/Phase/Hertz

7. He a t Typ e

8. Options Required (e.g., Smoke Detectors, Filter Options, etc.)

After initial entry, the tool will search all possible options, and display those which may be acceptable. If a certain tonnage is not available given the project specifics, there is an option to view the reason for that unit’ s rejectio n. Of the units available, select the one that is most suited to the project, based on CFM, motor speed, or leaving air conditions. Leaving air conditions off the coil as well as unit leaving air temperature are displayed. For distributors, a price is displayed. The unit selected will be saved as its current configuration. If circumstances c hange af ter the unit is saved, the program will require a reconfiguration, at which time the price will be adjusted as well.

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General Data

Table 4. OABD General Data—Cooling 3–5 Tons High Efficiency

3 Tons 4 Tons 5 Tons

OABD036A OABD048A OABD060A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 41,462 (12.15) 55,709 (16.33) 66,870 (19.60) Nominal cfm (m

Compressor

Number 1 1 1 Type Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Face Area, ft Rows 2 2 2 FPI 14 14 14

Indoor Coil

Type Propeller Propeller Propeller Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 4 4 4 FPI 12 12 12 Refrigerant Control TXV TXV TXV Drain Connection Size, in. (mm) 3/4 (20) 3/4 (20) 3/4 (20)

Outdoor Fan

Type Propeller Propeller Propeller Number Used 1 1 1 Diameter, in. (mm) 27 27 27 Drive Type Direct Direct Direct No. Speeds 1 1 1 CFM (m Number Motors 1 1 1 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1140 1140 1140

Indoor Fan

Type Backward Curved Backward Curved Backward Curved Number Used 1 1 1 Diameter Varies Varies Varies Drive Type Direct Drive Direct Drive Direct Drive Number Motors 1 1 1 Motor HP (kW), Standard–Oversized 2.68–4.0 (2–3) 2.68–4.0 (2–3) 2.68–4.0 (2–3) Motor RPM Varies Varies Varies

Filters

Type Furnished Varies Varies Varies Evap Size, in. (Qty) 20 x 24 x 2 (2) 20 x 24 x 2 (2) 20 x 24 x 2 (2) Type Furnished MERV-8 MERV-8 MERV-8 ERV Size, in. (Qty) 20 x 24 x 2 (4) 20 x 24 x 2 (4) 20 x 24 x 2 (4)

Refrigerant Charge, lb of R-410A

/h) 500–2000 (850–3398) 500–2000 (850–3398) 500–2000 (850–3398)

(m2) 11 (1.02) 11 (1.02) 11 (1.02)

(m2) 4.17 (0.39) 4.17 (0.39) 4.17 (0.39)

/h) 7,000 (11,893) 7,000 (11,893) 7,000 (11,893)

See Nameplate See Nameplate See Nameplate

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General Data

OABD Units

Table 5. OABD General Data—Cooling 6–9 Tons High Efficiency

6 Tons 7 Tons 8 Tons 9 Tons

OABD072A OABD084A OABD096A OABD108A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 78,600 (23.04) 88,768 (26.02) 99,099 (29.04) 108,214 (31.71) Nominal cfm (m

Compressor

Number 1111 Type Scroll Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Face Area, ft Rows 2222 FPI 14141414

Indoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (12.7) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 46 46 46 46 FPI 12121212 Refrigerant Control TXV TXV TXV TXV Drain Connection Size, in. (mm) 3/4 (20) 3/4 (20) 3/4 (20) 3/4 (20)

Outdoor Fan

Type Propeller Propeller Propeller Propeller Number Used 1 1 1 1 Diameter, in. (mm) 27 27 27 27 Drive Type Direct Direct Direct Direct No. Speeds 1111 CFM (m Number Motors 1111 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1140 1140 1140 1140

Indoor Fan

Type Backward Curved Backward Curved Backward Curved Backward Curved Number Used 1 1 1 1 Diameter Varies Varies Varies Varies Drive Type Direct Drive Direct Drive Direct Drive Direct Drive Number Motors 1111 Motor HP (kW), Standard–Oversized 2.68–4.0 (2–3) 2.68–4.0 (2–3) 2.68–4.0 (2–3) 2.68–4.0 (2–3) Motor RPM Varies Varies Varies Varies

Filters

Type Furnished Varies Varies Varies Varies Evap Size, in. (Qty) 20 x 24 x 2 (2) 20 x 24 x 2 (2) 20 x 24 x 2 (2) 20 x 24 x 2 (2) Type Furnished MERV-8 MERV-8 MERV-8 MERV-8 ERV Size, in. (Qty) 20 x 24 x 2 (4) 20 x 24 x 2 (4) 20 x 24 x 2 (4) 20 x 24 x 2 (4)

Refrigerant Charge, lb of R-410A

/h) 625–3000 (1061–5097) 625–3000 (1061–5097) 625–3000 (1061–5097) 625–3000 (1061–5097)

(m2) 11 (1.02) 11 (1.02) 11 (1.02) 11 (1.02)

(m2) 6.56 (167) 5.69 (145) 6.56 (167) 5.69 (145) 6.56 (167) 5.69 (145) 6.56 (167) 5.69 (145)

/h) 7,000 (11,893) 7,000 (11,893) 7,000 (11,893) 7,000 (11,893)

See Nameplate See Nameplate See Nameplate See Nameplate

OAU-PRC001E-EN 29

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General Data

OADD Units

Table 6. OADD General Data—Cooling 5–8 Tons High Efficiency

5 Tons Downflow 6 Tons Downflow 7 Tons Downflow 8 Tons Downflow

OADD060A OADD072A OADD084 OADD096

Cooling Performance

Gross Cooling Capacity, Btu (kW) 61,464 (18.01) 73,757 (21.62) 86,050 (25.22) 98,342 (28.82) Nominal cfm (m

Compressor

Number 1112 Type Scroll Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Face Area, ft Rows 2222 FPI 12121212

Indoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 6666 FPI 12121212 Refrigerant Control TXV TXV TXV TXV Drain Connection Size, in. (mm) 3/4 (20) 3/4 (20) 3/4 (20) 3/4 (20)

Outdoor Fan

Type Propeller Propeller Propeller Propeller Number Used 1112 Diameter, in. (mm) 24 (609.6) 24 (609.6) 24 (609.6) 24 (609.6) Drive Type Direct Direct Direct Direct No. Speeds 1111 CFM (m Number Motors 1112 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1140 1140 1140 1140

Indoor Fan

Type Backward Inclined Backward Inclined Backward Inclined Backward Inclined Number Used 1111 Diameter Varies Varies Varies Varies Drive Type Direct Drive Direct Drive Direct Drive Direct Drive Number Motors 1111 Motor HP (kW), Standard–Oversized 1.0–3.0 (0.75–2.24) 1.0–3.0 (0.75–2.24) 1.0–3.0 (0.75–2.24) 1.0–5.0 (0.75–3.73) Motor RPM, Standard–Oversized 1750–3500 1750–3500 1750–3500 1750–3500 Motor Frame Size, Standard–Oversized Varies Varies Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Refrigerant Charge, lb of R-410A

Downflow See Nameplate See Nameplate See Nameplate See Nam eplate

/h) 625–1250 (1062–2124) 750–1500 (1274–2549) 875–1750 (1487–2973) 1000–2000 (1699–3398)

(m2) 13 (1.21) 13 (1.21) 13 (1.21) 24 (2.23)

(m2) 6 (0.56) 6 (0.56) 6 (0.56) 9 (0.84)

/h) 6,500 (11,044) 6,500 (11,044) 6,500 (11,044) 13,000 (22,087)

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

30 OAU-PRC001E-EN

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General Data

OADD Units

Table 7. OADD General Data—Cooling 10–15 Tons High Efficiency

10 Tons Downflow 12 Tons Downflow 15 Tons Downflow

OADD120A OADD144A OADD180A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 121,904 (35.73) 147,514 (43.23) 184,392 (54.04) Nominal cfm (m

Compressor

Number 222 Type Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Face Area, ft Rows 222 FPI 121212

Indoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 666 FPI 121212 Refrigerant Control TXV TXV TXV Drain Connection Size, in. (mm) 3/4 (20) 3/4 (20) 3/4 (20)

Outdoor Fan

Type Propeller Propeller Propeller Number Used 2 2 2 Diameter, in. (mm) 24 24 24 Drive Type Direct Direct Direct No. Speeds 111 CFM (m Number Motors 222 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1140 1140 1140

Indoor Fan

Type Backward Inclined Backward Inclined Backward Inclined Number Used 1 1 1 Diameter Varies Varies Varies Drive Type Direct Drive Direct Drive Direct Drive Number Motors 111 Motor HP (kW), Standard–Oversized 1.0–5.0 (0.75–3.73) 1.0–5.0 (0.75–3.73) 1.0–5.0 (0.75–3.73) Motor RPM, Standard–Oversized 1750–3500 1750–3500 1750–3500 Motor Frame Size, Standard–Oversized Varies Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Refrigerant Charge, lb of R-410A

Downflow See Nameplate S ee Nameplate See Nameplate

/h) 1250–2500 (2124–4248) 1500–3000 (2549–5097) 1875–3750 (3186–6371)

(m2) 24 (2.23) 24 (2.23) 24 (2.23)

(m2) 9 (0.84) 9 (0.84) 9 (0.84)

/h) 13,500 (22,937) 13,500 (22,937) 13,500 (22,937)

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

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General Data

OADE Units

Table 8. OADE General Data—Cooling 5–8 Tons High Efficiency

5 Tons Downflow 6 Tons Downflow 7 Tons Downflow 8 Tons Downflow

OADE060A OADE072A OADE084 OADE096

Cooling Performance

Gross Cooling Capacity, Btu (kW) 68,946 (20.21) 76,360 (22.38) 85,869 (25.17) 110,390 (32.35)

Heating Performance

Gross Heating Capacity, Btu (kW) 58,350 (17.10) 72,248 (21.17) 82,750 (24.25) 98,826 (28.96)

CFM

Nominal cfm/AHRI rated cfm (m3/h) 625–1250 (1062–2124) 750–1500 (1274–2549) 875–1750 (1487–2973) 1000–2000 (1699–3398)

Compressor

Number 1112 Type Scroll Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Face Area, ft Rows 2222 FPI 12121212

Indoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 4444 FPI 12121212 Refrigerant Control TXV TXV TXV TXV Drain Connection Size, in. (mm) 3/4 (19.1) 3/4 (19.1) 3/4 (19.1) 3/4 (19.1)

Outdoor Fan

Type Propeller Propeller Propeller Propeller Number Used 1112 Diameter, in. (mm) 24 (609.6) 24 (609.6) 24 (609.6) 24 (609.6) Drive Type Direct Drive Direct Drive Direct Drive Direct Drive No. Speeds 1111 CFM (m Number Motors 1112 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1,140 1,140 1,140 1,140

Indoor Fan

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Refrigerant Charge, lb of R-410A

Downflow See Nameplate See Nameplate See Nameplate See Nameplate

(m2) 12 (1.11) 12 (1.11) 12 (1.11) 24 (2.23)

(m2) 6 (0.56) 6 (0.56) 6 (0.56) 9 (0.84)

/h) 6,500 (11,043) 6,500 (11,043) 6,500 (11,043) 13,000 (22,087)

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

32 OAU-PRC001E-EN

Page 33

General Data

OADE Units

Table 9. OADE General Data—Cooling 10–15 Tons High Efficiency

10 Tons Downflow 12 Tons Downflow 15 Tons Downflow

OADE120A OADE144A OADE180A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 134,862 (39.52) 151,166 (44.30) 182,794 (53.57)

Heating Performance

Gross Heating Capacity, Btu (kW) 122,036 (35.77) 140,332 (41.13) 174,098 (51.02)

CFM

Nominal cfm/AHRI rated cfm (m3/h) 1250–2500 (2124–4248) 1500–3000 (2549–5097) 1500–3000 (2549–5097)

Compressor

Number 222 Type Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Face Area, ft Rows 222 FPI 121212

Indoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 444 FPI 121212 Refrigerant Control TXV TXV TXV Drain Connection Size, in. (mm) 3/4 (19.1) 3/4 (19.1) 3/4 (19.1)

Outdoor Fan

Type Propeller Propeller Propeller Number Used 2 2 2 Diameter, in. (mm) 24 (609.6) 24 (609.6) 24 (609.6) Drive Type Dire ct Drive Direct Drive Direct Drive No. Speeds 111 CFM (m Number Motors 222 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1,140 1,140 1,140

Indoor Fan

Type Backward Inclined Backward Inclined Backward Inclined Number Used 1 1 1 Diameter Varies Varies Varies Drive Type Dire ct Drive Direct Drive Direct Drive Number Motors 111 Motor HP (kW), Standard–Oversized 1.0–5.0 (0.75–3.73) 1.0–5.0 (0.75–3.73) 1.0–5.0 (0.75–3.73) Motor RPM, Standard–Oversized 1750–3500 1750–3500 1750–3500 Motor Frame Size, Standard–Oversized Varies Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Refrigerant Charge, lb of R-410A

Downflow See Nameplate See Nameplate See Nameplate

(m2) 24 (2.23) 24 (2.23) 24 (2.23)

(m2) 9 (0.84) 9 (0.84) 9 (0.84)

/h) 13,500 (22,937) 13,500 (22,937) 13,500 (22,937)

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

OAU-PRC001E-EN 33

Page 34

General Data

OAGD Units

Table 10. OAGD General Data—Cooling 10–17 Tons High Efficiency

10 Tons 12 Tons 15 Tons 17 Tons

OAGD120A OAGD144A OAGD180A OAGD210A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 150,692 (44.16) 165,990 (48.65) 206,544 (60.53) 230,212 (67.47)

CFM

Nominal cfm (m3/h) 1250–2500 (2124–4248) 1500–3000 (2549–5097) 1875–3750 (3186–6371) 2125–4250 (3610–7221)

Compressor

Number 2222 Type Scroll Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Face Area, ft Rows 2222 FPI 14141414

Indoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 46 46 46 46 FPI 12121212 Refrigerant Control TXV TXV TXV TXV Drain Connection Size, in. (mm) 3/4 (19.1) 3/4 (19.1) 3/4 (19.1) 3/4 (19.1)

Outdoor Fan

Type Propeller Propeller Propeller Propeller Number Used 2223 Diameter, in. (mm) 27 (685.8) 27 (685.8) 27 (685.8) 27 (685.8) Drive Type Direct Direct Direct Direct No. Speeds 1111 CFM (m Number Motors 2223 Motor HP (kW), per motor 1 (0.75) 1 (0.75) 1 (0.75) 1 (0.75) Motor RPM 1,140 1,140 1,140 1,140

Indoor Fan

Type Backward Curved Backward Curved Backward Curved Backward Curved Number Used 1–2 1–2 1–2 1–2 Diameter Varies Varies Varies Varies Drive Type Direct or Belt Drive Direct or Belt Drive Direct or Belt Drive Direct or Belt Drive Number Motors 1–2 1–2 1–2 1–2 Motor HP (kW), Standard–Oversized 2–12 (1.49–8.95) 2–12 (1.49–8.95) 2–12 (1.49–8.95) 2–12 (1.49–8.95) Motor RPM, Standard–Oversized Varies Varies Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Refrigerant Charge, lb of R-410A

(m2) 25 (2.32) 25 (2.32) 25 (2.32) 25 (2.32)

(m2) 10.0 (0.93) 10.0 (0.93) 10.0 (0.93) 12.0 (1.11)

/h) 14,000 (23,786) 14,000 (23,786) 14,000 (23,786) 21,000 (35,679)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

See Nameplate See Nameplate See Nameplate See Name plate

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

34 OAU-PRC001E-EN

Page 35

General Data

OAGD Units

Table 11. OAGD General Data—Cooling 20–30 Tons High Efficiency

20 Tons 22 Tons 25 Tons 30 Tons

OAGD240A OAGD264A OAGD300A OAGD360A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 286,302 (83.91) 319,026 (93.50) 368,012 (107.85) 395,596 (115.94)

CFM

Nominal cfm (m3/h)

2500–5000

(4248–8495)

Compressor

Number 2222 Type Scroll Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Face Area, ft Rows 2222 FPI 14141414

(m2) 37 (3.44) 37 (3.44) 37 (3.44) 37 (3.44)

Indoor Coil

(m2) 12.0 (1.11) 12.0 (1.11) 15.0 (1.39) 15.0 (1.39)

Outdoor Fan

Type Propeller Propeller Propeller Propeller Number Used 3333 Diameter, in. (mm) 27 (685.8) 27 (685.8) 27 (685.8) 27 (685.8) Drive Type Direct Direct Direct Direct No. Speeds 1111

CFM (m Number Motors 3333 Motor HP (kW), per motor 1 (0.75) 1 (0.75) 1 (0.75) 1 (0.75) Motor RPM 1,140 1,140 1,140 1,140

/h) 21,000 (35,679) 21,000 (35,679) 21,000 (35,679) 21,000 (35,679)

Indoor Fan

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Refrigerant Charge, lb of R-410A

Guide” in “Appendix,”

p. 84

See Nameplate See Nameplate See Nameplate See Name plate

2750–5500

(4672–9345)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

3125–6250

(5309–10619)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

3750–7500

(6371–12743)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

OAU-PRC001E-EN 35

Page 36

General Data

OAKD Units

Table 12. OAKD General Data—Cooling 12–20 Tons High Efficiency

12 Tons Downflow 15 Tons Downflow 17 Tons Downflow 20 Tons Downflow

OAKD144A OAKD180A OAKD210A OAKD240A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 147,514 (43.23) 184,392 (54.04) 208,973 (61.24) 245,856 (72.05) Nominal cfm (m

Compressor

Number 2222 Type Scroll Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Face Area, ft Rows 2333 FPI 12121212

Indoor Coil

Outdoor Fan

Type Propeller Propeller Propeller Propeller Number Used 2333 Diameter, in. (mm) 24 (609.6) 24 (609.6) 24 (609.6) 24 (609.6) Drive Type Direct Direct Direct Direct No. Speeds 1111 CFM (m Number Motors 3333 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1140 1140 1140 1140

Indoor Fan

Type Backward Inclined Backward Inclined Backward Inclined Backward Inclined Number Used 1111 Diameter Varies Varies Varies Varies Drive Type Direct Drive Direct Drive Direct Drive Direct Drive Number Motors 1111 Motor HP (kW), Standard–Oversized 1.0–5.0 (0.75–3.73) 1.0–5.0 (0.75–3.73) 1.0–7.5 (0.75–5.6) 1.0–7.5 (0.75–5.6) Motor RPM, Standard–Oversized 1750–3500 1750–3500 1750–3500 1750–3500 Motor Frame Size, Standard–Oversized Varies Varies Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Refrigerant Charge, lb of R-410A

Downflow See Nam eplate See Nameplate See Nameplate See Nameplate

/h) 1500–3000 (2549–5097) 1875–3750 (3186–6371) 2125–4250 (3610–7221) 2500–5000 (4248–8495)

(m2) 24 (2.23) 30 (2.79) 38 (3.53) 38 (3.53)

(m2) 9 (0.84) 10 (0.93) 15 (1.39) 15 (1.39)

/h) 19,500 (33,131) 19,500 (33,131) 19,500 (33,131) 19,500 (33,131)

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

36 OAU-PRC001E-EN

Page 37

General Data

OAKD Units

Table 13. OAKD General Data—Cooling 22–30 Tons High Efficiency

22 Tons Downflow 25 Tons Downflow 30 Tons Downflow

OAKD264A OAKD300A OAKD360A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 270,442 (79.26) 307,320 (90.07) 368,784 (108.08) Nominal cfm (m

/h)

2750–5500

(4692–9345)

Compressor

Number 222 Type Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Face Area, ft Rows 333 FPI 121212

(m2) 38 (3.53) 38 (3.53) 38 (3.53)

Indoor Coil

(m2) 15 (1.39) 20 (1.86) 20 (1.86)

Outdoor Fan

Type Propeller Propeller Propeller Number Used 3 3 3 Diameter, in. (mm) 24 (609.6) 24 (609.6) 24 (609.6) Drive Type Direct Direct Direct No. Speeds 111

CFM (m Number Motors 3 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1140 1140 1140

/h) 19,500 (33,131) 19,500 (33,131) 19,500 (33,131)

Indoor Fan

Type Backward Inclined Backward Inclined Backward Inclined Number Used 1 1 1 Diameter Varies Varies Varies Drive Type Dire ct Drive Direct Drive Direct Drive Number Motors 111 Motor HP (kW), Standard–Oversized 1.0–7.5 (0.75–5.6) 1.0–15.0 (0.75–11.19) 1.0–15.0 (0.75–11.19) Motor RPM, Standard–Oversized 1750–3500 1750–3500 1750–3500 Motor Frame Size, Standard–Oversized Varies Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Guide” in “Appendix,”

p. 84

Refrigerant Charge, lb of R-410A

Downflow See Nameplate See Nameplate See Nameplate

3125–6250

(5309–10619)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

3750–7500

(6371–12743)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

OAU-PRC001E-EN 37

Page 38

General Data

OAKE Units

Table 14. OAKE General Data—Cooling 12–20 Tons High Efficiency

12 Tons Downflow 15 Tons Downflow 17 Tons Downflow 20 Tons Downflow

OAKE144A OAKE180A OAKE210A OAKE240A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 160,024 (46.90) 189,076 (55.41) 225,948 (66.22) 258,766 (75.84)

Heating Performance

Gross Heating Capacity, Btu (kW) 143,650 (42.10) 185,800 (54.45) 208,973 (61.24) 244,186 (71.56)

CFM

Nominal cfm/AHRI rated cfm (m3/h) 1500–3000 (2549–5097) 1875–3750 (3186–6371) 2125–4250 (3610–7221) 2500–5000 (4248–8495)

Compressor

Number 2222 Type Scroll Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 2222 FPI 12 12 12 12

Indoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 4444 FPI 12 12 12 12 Refrigerant Control TXV TXV TXV TXV Drain Connection Size, in. (mm) 1 (25.4) 1 (25.4) 1 (25.4) 1 (25.4)

Outdoor Fan

Type Propeller Propeller Propeller Propeller Number Used 2 3 3 3 Diameter, in. (mm) 24 (609.6) 24 (609.6) 24 (609.6) 24 (609.6) Drive Type Direct Drive Direct Drive Direct Drive Direct Drive No. Speeds 1111 CFM (m Number Motors 3333 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1,140 1,140 1,140 1,140

Indoor Fan

Type Backward Inclined Backward Inclined Backward Inclined Backward Inclined Number Used 1 1 1 1 Diameter Varies Varies Varies Varies Drive Type Direct Drive Direct Drive Direct Drive Direct Drive Number Motors 1111 Motor HP (kW), Standard–Oversized 1–5.0 (0.75–3.73) 1–5.0 (0.75–3.76) 1–7.5 (0.75–5.59) 1–7.5 (0.75–5.59) Motor RPM, Standard–Oversized 1750–3500 1750–3500 1750–3500 1750–3500 Motor Frame Size, Standard–Oversized Varies Varies Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Refrigerant Charge, lb of R-410A

Downflow See Nameplate See Nameplate See Nameplate See Nameplate

(m2) 30 (2.79) 30 (2.79) 31 (2.88) 31 (2.88)

(m2) 9 (0.84) 10 (0.93) 16 (1.49) 16 (1.49)

/h) 19,500 (33,131) 19,500 (33,131) 19,500 (33,131) 19,500 (33,131)

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

38 OAU-PRC001E-EN

Page 39

General Data

OAKE Units

Table 15. OAKE General Data—Cooling 22–30 Tons High Efficiency

22 Tons Downflow 25 Tons Downflow 30 Tons Downflow

OAKE264A OAKE300A OAKE360A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 285,822 (83.77) 328,552 (96.29) 360,016 (105.51)

Heating Performance

Gross Heating Capacity, Btu (kW) 259,134 (75.94) 294,874 (86.42) 321,576 (94.24)

CFM

Nominal cfm/AHRI rated cfm (m3/h)

2750–5500

(4672–9345)

Compressor

Number 222 Type Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 222 FPI 121212

(m2) 31 (2.88) 38 (3.53) 38 (3.53)

Indoor Coil

(m2) 16 (1.49) 20 (1.86) 20 (1.86)

Outdoor Fan

Type Propeller Propeller Propeller Number Used 3 3 3 Diameter, in. (mm) 24 (609.6) 24 (609.6) 24 (609.6) Drive Type Dire ct Drive Direct Drive Direct Drive No. Speeds 111

CFM (m Number Motors 333 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1,140 1,140 1,140

/h) 19,500 (33,131) 19,500 (33,131) 19,500 (33,131)

Indoor Fan

Type Backward Inclined Backward Inclined Backward Inclined Number Used 1 1 1 Diameter Varies Varies Varies Drive Type Dire ct Drive Direct Drive Direct Drive Number Motors 111 Motor HP (kW), Standard–Oversized 1–7.5 (0.75–5.59) 1.0–15.0 (0.75–11.19) 1.0–15.0 (0.75–11.19) Motor RPM, Standard–Oversized 1750–3500 1750–3500 1750–3500 Motor Frame Size, Standard–Oversized Varies Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Guide” in “Appendix,”

p. 84

Refrigerant Charge, lb of R-410A

Downflow See Nameplate See Nameplate See Nameplate

3125–6250

(5309–10619)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

3750–7500

(6371–12743)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

OAU-PRC001E-EN 39

Page 40

General Data

OAND Units

Table 16. OAND General Data—Cooling 30–40 Tons High Efficiency

30 Tons Downflow 35 Tons Downflow 40 Tons Downflow

OAND360A OAND420A OAND480A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 368,784 (108.08) 430,248 (126.09) 491,712 (144.11) Nominal cfm (m

/h)

3750–7500

(6371–12743)

Compressor

Number 2 3 3 Type Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Face Area, ft Rows 2 3 3 FPI 12 12 12

(m2) 48 (4.46) 53 (4.92) 63 (5.85)

Indoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 6 6 6 FPI 12 12 12 Refrigerant Control TXV TXV TXV Drain Connection Size, in. (mm) 1-1/4 (32) 1-1/4 (32) 1-1/4 (32)

(m2) 23 (2.14) 23 (2.14) 29 (2.69)

Outdoor Fan

Type Propeller Propeller Propeller Number Used 4 4 4 Diameter, in. (mm) 24 24 24 Drive Type Direct Drive Direct Drive Direct Drive No. Speeds 1 1 1

CFM (m Number Motors 4 4 4 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1140 1140 1140

/h) 26,000 (44,174) 26,000 (44,174) 26,000 (44,174)

Indoor Fan

Type Backward Inclined Backward Inclined Backward Inclined Number Used 1 1 1 or 2 Diameter Varies Varies Varies Drive Type Direct Drive Direct Drive Direct Drive Number Motors 1 1 1 or 2 Motor HP (kW), Standard–Oversized 1.5–15 (1.12–11.19) 1.5–15 (1.12–11.19) 2.0–15 (1.49–11.19) Motor RPM, Standard–Oversized 1750–3500 1750–3500 1750–3500 Motor Frame Size, Standard–Oversized Varies Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Guide” in “Appendix,”

p. 84

Refrigerant Charge, lb of R-410A

Downflow See Nameplate See Nameplate See Nameplate

4375–8750

(7433–14866)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

5000–10000

(8495–16990)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

40 OAU-PRC001E-EN

Page 41

General Data

OAND Units

Table 17. OAND General Data—Cooling 45–54 Tons High Efficiency

45 Tons Downflow 50 Tons Downflow 54 Tons Downflow

OAND540A OAND600A OAND648A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 553,176 (162.12) 614,640 (180.13) 663,811 (194.54) Nominal cfm (m

/h)

5625–11250

(9557–19114)

Compressor

Number 3 4 4 Type Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Face Area, ft Rows 4 4 4 FPI 12 12 12

(m2) 63 (5.85 63 (5.85 63 (5.85

Indoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 6 6 6 FPI 12 12 12 Refrigerant Control TXV TXV TXV Drain Connection Size, in. (mm) 1-1/4 (32) 1-1/4 (32) 1-1/4 (32)

(m2) 29 (2.69) 29 (2.69) 29 (2.69)

Outdoor Fan

Type Propeller Propeller Propeller Number Used 4 4 4 Diameter, in. (mm) 24 (609.6) 24 (609.6) 24 (609.6) Drive Type Direct Direct Direct No. Speeds 1 1 1

CFM (m Number Motors 4 4 4 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1140 1140 1140

/h) 26,000 (44,174) 26,000 (44,174) 26,000 (44,174)

Indoor Fan

Type Backward Inclined Backward Inclined Backward Inclined Number Used 1 or 2 1 or 2 1 or 2 Diameter Varies Varies Varies Drive Type Direct Drive Direct Drive Direct Drive Number Motors 1 or 2 1 or 2 1 or 2 Motor HP (kW), Standard–Oversized 2.0–15 (1.49–11.19) 3.0–15 (2.24–11.19) 3.0–15 (2.24–11.19) Motor RPM, Standard–Oversized 1750–3500 1750–3500 1750–3500 Motor Frame Size, Standard–Oversized Varies Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Guide” in “Appendix,”

p. 84

Refrigerant Charge, lb of R-410A

Downflow See Nameplate See Nameplate See Nameplate

6250–12500

(10619–21238)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

6750–13500

(11468–22937)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

OAU-PRC001E-EN 41

Page 42

General Data

OANE Units

Table 18. OANE General Data—Cooling 30–40 Tons High Efficiency

30 Tons Downflow 35 Tons Downflow 40 Tons Downflow

OANE360A OANE420A OANE480A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 379,546 (111.23) 451,733 (132.39) 491,044 (143.91)

Heating Performance

Gross Heating Capacity, Btu (kW) 361,914 (106.07) 406,655 (119.18) 450,153 (131.93)

CFM

Nominal cfm/AHRI rated cfm (m3/h)

3750–7500

(6371–12743)

4375–8750

(7433–14866)

Compressor

Number 233 Type Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 222 FPI 121212

(m2) 50 (4.65) 62 (5.76) 62 (5.76)

Indoor Coil

(m2) 22 (2.04) 28 (2.60) 28 (2.60)

Outdoor Fan

Type Propeller Propeller Propeller Number Used 4 4 4 Diameter, in. (mm) 24 (609.6) 24 (609.6) 24 (609.6) Drive Type Dire ct Drive Direct Drive Direct Drive No. Speeds 111

CFM (m Number Motors 444 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1,140 1,140 1,140

/h) 26,000 (44,174) 26,000 (44,174) 26,000 (44,174)

Indoor Fan

Type Backward Inclined Backward Inclined Backward Inclined Number Used 1 1 1 or 2 Diameter Varies Varies Varies Drive Type Dire ct Drive Direct Drive Direct Drive Number Motors 1 1 1 or 2 Motor HP (kW), Standard–Oversized 1.5–15 (1.12–11.19) 1.5–15 (1.12–11.19) 2.0–15 (1.49–11.19) Motor RPM, Standard–Oversized 1750–3500 1750–3500 1750–3500 Motor Frame Size, Standard–Oversized Varies Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Guide” in “Appendix,”

p. 84

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

Refrigerant Charge, lb of R-410A

Downflow See Nameplate See Nameplate See Nameplate

5000–10000

(8495–16990)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

42 OAU-PRC001E-EN

Page 43

General Data

OANE Units

Table 19. OANE General Data—Cooling 45–54 Tons High Efficiency

45 Tons Downflow 50 Tons Downflow 55 Tons Downflow

OANE540A OANE600A OANE648A

Cooling Performance

Gross Cooling Capacity, Btu (kW) 543,223 (159.20) 611,624 (179.25) 663,300 (194.39)

Heating Performance

Gross Heating Capacity, Btu (kW) 489,302 (143.40) 555,346 (162.76) 598,432 (175.38)

CFM

Nominal cfm/AHRI rated cfm (m3/h)

5625–11250

(9557–19114)

Compressor

Number 344 Type Scroll Scroll Scroll

Outdoor Coil

Type High Performance High Performance High Performance Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Face Area, ft Rows 222 FPI 121212

(m2) 62 (5.76) 63 (5.85) 63 (5.85)

Indoor Coil

(m2) 28 (2.60) 28 (2.60) 28 (2.60)

Outdoor Fan

Type Propeller Propeller Propeller Number Used 4 4 4 Diameter, in. (mm) 24 (609.6) 24 (609.6) 24 (609.6) Drive Type Dire ct Drive Direct Drive Direct Drive No. Speeds 111

CFM (m Number Motors 444 Motor HP (kW), per motor 1.0 (0.75) 1.0 (0.75) 1.0 (0.75) Motor RPM 1,140 1,140 1,140

/h) 26,000 (44,174) 26,000 (44,174) 26,000 (44,174)

Indoor Fan

Type Backward Inclined Backward Inclined Backward Inclined Number Used 1 or 2 1 or 2 1 or 2 Diameter Varies Varies Varies Drive Type Dire ct Drive Direct Drive Direct Drive Number Motors 1 or 2 1 or 2 1 or 2 Motor HP (kW), Standard–Oversized 2.0–15 (1.49–11.19) 3.0–15 (2.24–11.19) 3.0–15 (2.24–11.19) Motor RPM, Standard–Oversized 1750–3500 1750–3500 1750–3500 Motor Frame Size, Standard–Oversized Varies Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number Size Recommended

Guide” in “Appendix,”

p. 84

Refrigerant Charge, lb of R-410A

Downflow See Nameplate See Nameplate See Nameplate

6250–12500

(10619–21238)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

6750–13500

(11468–22937)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 84

OAU-PRC001E-EN 43

Page 44

Unit Clearances, Curb Dimensions, and Dimensional





(1'72(1'







Data

OAB Units

Unit Clearances

Figure 13. Typical installation clearances for OAB unit

44 OAU-PRC001E-EN

Page 45

Unit Clearances, Curb Dimensions, and Dimensional Data





(1'72(1'







Figure 14. Typical installation clearances for OAB unit with auxiliary cabinet

OAB Units

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

OAU-PRC001E-EN 45

Page 46

Unit Clearances, Curb Dimensions, and Dimensional Data























6833/<

5(7851































5(7851

6833/<

OAB Units

Curb Dimensions

Figure 15. Unit curb data for OAB 3–9 tons

Figure 16. Unit curb data for OAB 3–9 tons with auxiliary cabinet

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

46 OAU-PRC001E-EN

Page 47

Dimensional Data















5,*+76,'(9,(:















)52179,(:

(/(&75,&

',6&211(&7





5$







6$













%277209,(:

7+528*+%$6(

(/(&75,&



















5,*+76,'(9,(:















)52179,(:

(/(&75,&

',6&211(&7





5$







6$













%277209,(:

7+528*+%$6(

(/(&75,&

Unit Clearances, Curb Dimensions, and Dimensional Data

OAB Units

Figure 17. Unit dimensional data fo r OAB 3–9 tons (in.)

Figure 18. Unit dimensional data for OAB 3–9 tons with auxiliary cabinet (in.)

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

OAU-PRC001E-EN 47

Page 48

Unit Clearances, Curb Dimensions, and Dimensional Data

CLEARANCE 36"

TOP OF UNIT 72"

CLEARANCE 60"

CLEARANCE 36"

CLEARANCE FROM

CLEARANCE 48"

3'-0"

4'-0"

OAD Units

Unit Clearances

Figure 19. Typical installation clearances for OAD unit

48 OAU-PRC001E-EN

Page 49

Unit Clearances, Curb Dimensions, and Dimensional Data

7'0"

6'0"

3'0"

4'0"

3'0"

Figure 20. Typical installation clearances for OAD unit with auxiliary cabinet

OAD Units

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

OAU-PRC001E-EN 49

Page 50

Unit Clearances, Curb Dimensions, and Dimensional Data

3 4

" 28

" 83

" 79

19"

" 10

45 "

49"

3 4

1.00 TYP.

GUTTER DETAIL

4 "

1 8

1 2

GUTTER

19"

" 83

1 4

40"

127

" 36

" 4

1 2

" 10

" 79

28 "

451"

49"

3 4

1.00 TYP.

OAD Units

Curb Dimensions

Figure 21. Unit curb data for OAD 5–12 tons

Figure 22. Unit curb data for OAD 5–12 tons with auxiliary cabinet

50 OAU-PRC001E-EN

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

Page 51

Dimensional Data

53.00

59.45

87.12

36.71

87.33

59.23

87.18

29.63

87.33

59.23

53.00

131.26

87.12

59.45

35.24

Unit Clearances, Curb Dimensions, and Dimensional Data

OAD Units

Figure 23. Unit dimensional data for OAD 5–12 tons (in.)

Figure 24. Unit dimensional data for OAD 5–12 tons with auxiliary cabinet (in.)

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

OAU-PRC001E-EN 51

Page 52

Unit Clearances, Curb Dimensions, and Dimensional Data

72"

84"

36"

48"

36"

Indirect-Fired OAG Units

Unit Clearances

Figure 25. Typical installation clearances for indirect-fired OAG unit

52 OAU-PRC001E-EN

Page 53

Unit Clearances, Curb Dimensions, and Dimensional Data

72"

84"

36"

48"

36"

Figure 26. Typical installation clearances for indirect-fired OAG unit with auxiliary cabinet

Indirect-Fired OAG Units

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

OAU-PRC001E-EN 53

Page 54

Unit Clearances, Curb Dimensions, and Dimensional Data

55"

193"

" 23

53"

" 8

" 70

" 117

1 2

441"

84"

53"

1655"

" 70

" 117

55"

" 19

" 25

" 3

1 2

Indirect-Fired OAG Units

Curb Dimensions

Figure 27. Unit curb data for indirect-fired OAG (in.)

Figure 28. Unit curb data for indirect-fired OAG with auxiliary cabinet (in.)

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

54 OAU-PRC001E-EN

Page 55

Dimensional Data

74.000

121.000

66.096

121.371

22.358

BASE TO BOTTOM

OF AIR INLET

74.000

169.347

169.072

Unit Clearances, Curb Dimensions, and Dimensional Data

Indirect-Fired OAG Units

Figure 29. Unit dimensional data for indirect-fired OAG

Figure 30. Unit dimensional data for indirect-fired OAG with auxiliary cabinet

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

OAU-PRC001E-EN 55

Page 56

Unit Clearances, Curb Dimensions, and Dimensional Data

72"

84"

36"

48"

36"

Direct-Fired OAG Units

Unit Clearances

Figure 31. Typical installation clearances for direct-fired OAG unit

56 OAU-PRC001E-EN

Page 57

Curb Dimensions

35 "

25"

53"

21"

15"

117

3 4

SWITCH

ELECTRIC

DISCONNECT

GAS INLET

121.371

66.096

74.000

121"

17.323

3.078

33.751

5.5852

ELECTRIC

THROUGH BASE

Unit Clearances, Curb Dimensions, and Dimensional Data

Direct-Fired OAG Units

Figure 32. Unit curb data for direct-fired OAG tons (in.)

Dimensional Data

OAU-PRC001E-EN 57

Figure 33. Unit dimensional data for direct-fired OAG

Page 58

Unit Clearances, Curb Dimensions, and Dimensional Data

CLEARANCE 36"CLEARANCE 60"

TOP OF UNIT 72"

CLEARANCE 36"

CLEARANCE FROM

CLEARANCE 48"

3'0"

4'0"

3'0"

OAK Units

Unit Clearances

Figure 34. Typical installation clearances for OAK unit

58 OAU-PRC001E-EN

Page 59

Unit Clearances, Curb Dimensions, and Dimensional Data

TOP OF UNIT 72"

"63 ECNARAELC"06 ECNARAELC

CLEARANCE 36"

CLEARANCE FROM

CLEARANCE 48"

3'0"

4'0"

3'0"

Figure 35. Typical installation clearances for OAK unit with auxiliary cabinet

OAK Units

OAU-PRC001E-EN 59

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

Page 60

Unit Clearances, Curb Dimensions, and Dimensional Data

7'0"

6'0"

7'0"

6'0"

OAK Units

Figure 36. Typical installation clearances for OAK unit

Figure 37. Typical installation clearances for OAK unit with auxiliary cabinet

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

60 OAU-PRC001E-EN

Page 61

Curb Dimensions

PPL

TYP.

30"

29"

56"

"2 52

" 98

102"

1 4

GUTTER

102"

164

29"

"8 98

56"

"4 1

23 "

30"

58"

1 2

1 8

TYP.

GUTTER DETAIL

" 4

1 2

Unit Clearances, Curb Dimensions, and Dimensional Data

OAK Units

Figure 38. Unit curb data for OAK 12–30 tons (in.)

Figure 39. Unit curb data for OAK 12–30 to ns wi th auxi liary cabinet (in .)

OAU-PRC001E-EN 61

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

Page 62

Unit Clearances, Curb Dimensions, and Dimensional Data

80.57

OF AIR INLET

106.45

66.83

106.00

135.52

94.21

43.02

BASE TO BOTTOM

60.00

80.57

106.00

94.21

62.11

66.83

60.00

106.10

200.99

OF AIR INLET

43.02

BASE TO BOTTOM

62.51

OAK Units

Dimensional Data

Figure 40. Unit dimensional data for OAK 12–30 tons

Figure 41. Unit dimensional data for OAK 12–30 tons with auxiliary cabinet

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

62 OAU-PRC001E-EN

Page 63

Unit Clearances, Curb Dimensions, and Dimensional Data

TOP OF UNIT 72"

"63 ECNARAELC"06 ECNARAELC

CLEARANCE 36"

CLEARANCE FROM

CLEARANCE 48"

3'0"

4'0"

3'0"

OAN Units

Unit Clearances

Figure 42. Typical installation clearances for OAN unit

OAU-PRC001E-EN 63

Page 64

Unit Clearances, Curb Dimensions, and Dimensional Data

CLEARANCE 36"

TOP OF UNIT 72"

CLEARANCE 36"CLEARANCE 60"

CLEARANCE FROM

CLEARANCE 48"

3'0"

4'0"

3'0"

OAN Units

Figure 43. Typical installation clearances for OAN unit with auxiliary cabinet

64 OAU-PRC001E-EN

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

Page 65

Unit Clearances, Curb Dimensions, and Dimensional Data

7'0"

6'0"

7'0"

6'0"

Figure 44. Typical installation clearances for OAN unit

OAN Units

Figure 45. Typical installation clearances for OAN unit with auxiliary cabinet

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

OAU-PRC001E-EN 65

Page 66

Unit Clearances, Curb Dimensions, and Dimensional Data

33"

63"

"2 59

140"

" 136

TYP.

"8 51

"4 22

3 8

GUTTER

TYP.

63"

202"

"2 59

140"

33"

"8 51

"4 22

"2 136

"8 4

"8 54

3 8

GUTTER DETAIL

" 4

1 2

OAN Units

Curb Dimensions

Figure 46. Unit curb data for OAN 30–54 tons

Figure 47. Unit curb data for OAN 30–54 tons with auxiliary cabinet

66 OAU-PRC001E-EN

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

Page 67

Dimensional Data

144.00

67.00

74.63

144.17

42.00

92.07

98.49

48.62

62.00

67.00

74.63

98.49

144.00

92.07

144.17

35.84

Unit Clearances, Curb Dimensions, and Dimensional Data

OAN Units

Figure 48. Unit dimensional data for OAN 30–54 tons

Figure 49. Unit dimensional data for OAN 30–54 tons with auxiliary cabinet

Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.

OAU-PRC001E-EN 67

Page 68

Indirect Gas-fired Furnace Heater and Power

INDUCER MOTOR

INLET PRESSURE TAP

IGNITION

ON/OFF GAS VALVE

MANIFOLD GAS

INLET PRESSURE = 7" W.C./14" W.C.

AIR-PROVING

PRESSURE TAP

SWITCH

MINIMUM/MAXIMUM

PRESSURE TAP

MANIFOLD GAS

ROLLOUT SWITCH

CONTROLLERS

MINIMUM/MAXIMUM INLET PRESSURE =

7" W.C./14" W.C.

CONDENSATE DRAIN (TYP. 2)

INDUCER BLOWER

MODULATING VALVE

FLAME SENSOR

HIGH LIMIT SWITCH

ROLLOUT SWITCH

MODULATING GAS VALVE

MAIN POWER ENTRANCE FOR UNIT

Figure 50. OAB, OAD, OAG, OAK, and OAN indirect gas-fired furnace heater and power

68 OAU-PRC001E-EN

Page 69

Unit Weight and Rigging

Unit Weight

Table 20. Typical unit weight and center-of-gravity (CG)—units without auxiliary cabinet

Operating Weight (lb) Shipping Weight (lb) Center-of-gravity (in.)

Model Number

OABD036*/OABE036* 1255 1439 1503 1687 26 43.5 OABD048*/OABE048* 1255 1439 1503 1687 26 43.5 OABD060*/OABE060* 1255 1439 1503 1687 26 43.5 OABD072*/OABE072* 1295 1479 1543 1727 26 43.5 OABD084*/OABE084* 1295 1479 1543 1727 26 43.5 OABD096*/OABE096* 1295 1479 1543 1727 26 43.5 OABD108*/OABE108* 1336 1520 1584 1768 26 43.5 OADD060*/OADE060* 1811 2 275 1811 2275 40 30 OADD072*/OADE072* 1811 2 330 1811 2330 40 30 OADD084*/OADE084* 1811 2 330 1811 2330 40 30 OADD096*/OADE096* 1901 2 596 1901 2596 40 30 OADD120*/OADE120* 1901 2 596 1901 2596 40 30 OADD144*/OADE144* 1901 2 596 1901 2596 40 30 OADD180*/OADE180* 1901 2 734 1901 2734 40 30 OAGD120*/OAGE120* 2559 4012 2559 4012 N/A N/A OAGD144*/OAGE144* 2559 4063 2559 4063 N/A N/A OAGD180*/OAGE180* 2559 4113 2559 4113 N/A N/A OAGD210*/OAGE210* 2567 4243 2567 4243 N/A N/A OAGD240*/OAGE240* 2567 4294 2567 4294 N/A N/A OAGD264*/OAGE264* 2567 4294 2567 4294 N/A N/A OAGD300*/OAGE300* 2822 4546 2822 4546 N/A N/A OAKD144*/OAKE144* 3125 3790 3125 3790 49 34 OAKD180*/OAKE180* 3289 3954 3289 3954 49 34 OAKD210*/OAKE210* 3344 4161 3344 4161 49 34 OAKD240*/OAKE240* 3372 4189 3372 4189 49 34 OAKD264*/OAKE264* 3372 4189 3372 4189 49 34 OAKD300*/OAKE300* 3530 4390 3530 4390 49 34 OAKD360*/OAKE360* 3338 4198 3338 4198 49 34 OAND360*/OANE360* 4931 5914 4931 5914 67 38 OAND420*/OANE420* 5246 6229 5246 6229 67 38 OAND480*/OANE480* 5339 6351 5339 6351 67 38 OAND540*/OANE540* 5406 6363 5406 6363 67 38 OAND600*/OANE600* 5570 6652 5570 6652 67 38 OAND648*/OANE648* 5582 6664 5582 6664 67 38

Note: Minimum and maximum weights vary widely due to the highly configurable nature of the product.

Min Max Min Max Length Width

OAU-PRC001E-EN 69

Page 70

Unit Weight and Rigging

Table 21. Typical unit weight and center-of-gravity (CG)—units with auxiliary cabinet

Model Number

OABD036*/OABE036* 1740 2054 2048 2362 26 68 OABD048*/OABE048* 1740 2054 2048 2362 26 68 OABD060*/OABE060* 1740 2054 2048 2362 26 68 OABD072*/OABE072* 1780 2094 2088 2402 26 68 OABD084*/OABE084* 1780 2094 2088 2402 26 68 OABD096*/OABE096* 1780 2094 2088 2402 26 68 OABD108*/OABE108* 1821 2135 2129 2443 26 68 OADD060*/OADE060* 2798 3 262 2798 3262 56 29 OADD072*/OADE072* 2743 3 262 2743 3262 56 29 OADD084*/OADE084* 2775 3 294 2775 3294 56 29 OADD096*/OADE096* 2927 3 622 2927 3622 56 29 OADD120*/OADE120* 2927 3 622 2927 3622 56 29 OADD144*/OADE144* 2927 3 622 2927 3622 56 29 OADD180*/OADE180* 2927 3 760 2927 3760 56 29 OAGD120*/OAGE120* 3879 4012 3879 4012 N/A N/A OAGD144*/OAGE144* 3879 4281 3879 4281 N/A N/A OAGD180*/OAGE180* 3879 4281 3879 4281 N/A N/A OAGD210*/OAGE210* 3887 4289 3887 4289 N/A N/A OAGD240*/OAGE240* 3887 4294 3887 4294 N/A N/A OAGD264*/OAGE264* 3887 4294 3887 4294 N/A N/A OAGD300*/OAGE300* 4058 4546 4058 4546 N/A N/A OAKD144*/OAKE144* 4508 5173 4508 5173 72 33 OAKD180*/OAKE180* 4715 5380 4715 5380 72 33 OAKD210*/OAKE210* 5028 5845 5028 5845 72 33 OAKD240*/OAKE240* 5056 5873 5056 5873 72 33 OAKD264*/OAKE264* 5056 5873 5056 5873 72 33 OAKD300*/OAKE300* 5194 6054 5194 6054 72 33 OAKD360*/OAKE360* 4936 5796 4936 5796 72 33 OAND360*/OANE360* 6907 7890 6907 7890 81 37 OAND420*/OANE420* 7222 8205 7222 8205 81 37 OAND480*/OANE480* 7315 8327 7315 8327 81 37 OAND540*/OANE540* 7382 8339 7382 8339 81 37 OAND600*/OANE600* 7527 8609 7527 8609 81 37 OAND648*/OANE648* 7539 8621 7539 8621 81 37

Note: Minimum and maximum weights vary widely due to the highly configurable nature of the product.

Operating Weight (lb) Shipping Weight (lb) Center-of-gravity (in.)

Min Max Min Max Length Width

70 OAU-PRC001E-EN

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Corner Weight

OAB Cabinet

OAD, OAK, and OAN Cabinets

CONDENSER SECTION

INTAKE HOOD

Unit Weight and Rigging

Table 22. Corner weights (percent of total weight)

Percentage (%)

Cabinet Size

OAB* without auxiliary cabinet 21.3 31.9 21.4 25.4 OAB* with auxiliary cabinet 24.1 29.5 22.0 24.4 OAD* without auxiliary cabinet 16.3 20.7 33.3 29.7 OAD* with auxiliary cabinet 18.2 23.2 27.5 31.1 OAK* without auxiliary cabinet 20.1 17.2 34.0 28.7 OAK* with auxiliary cabinet 18.3 24.0 32.5 25.2 OAN* without auxiliary cabinet 14.9 24.2 29.9 31.0 OAN* with auxiliary cabinet 16.8 23.6 28.5 31.1

Notes:

1. Actual corner weights will vary depending on components sel ected.

2. OAG corner weights are not currently available.

Figure 51. Cabinet corners

Corner A Corner B Corner C Corner D

OAU-PRC001E-EN 71

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Unit Weight and Rigging

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:,'7+

635($'(5

%$56

6&5(:3,16+$&./(

/2&$7,216

4-point lift

(Model: OAB)

/(1*7+

:,'7+

635($'(5

%$56

6&5(:3,16+$&./(

/2&$7,216

6-point lift

(Model: OAB)

Rigging

Figure 52. Rigging and center-of-gravity data

72 OAU-PRC001E-EN

Page 73

Figure 52. Rigging and center-of-gravity data (continued)

SPREADER

BARS

DETAIL A

SCALE 1 : 12

SCREW PIN SHACKLE

4 LOCATIONS

4-point lift

(Model: Indirect-fired OAG)

REVISED BY

DIMENSIONS ARE IN INCHES UNLESS OTHERWISE SPECIFIED. DO NOT SCALE DRAWING.

PART:

M Packaged Unit\OAG IOM Drawings\OAG-IF IOM Drawings\

DRAWN BY

2716 Grassland Drive

SPREADER

BARS

SCALE 1 : 12

DETAIL A

SCREW PIN SHACKLE

4 LOCATIONS

6-point lift

(Model: Indirect-fired OAG with auxiliary cabinet)

SPREADER

BARS

SCREW PIN SHACKLE

4 LOCATIONS

4-point lift

(Model: Direct-fired OAG)

Unit Weight and Rigging

OAU-PRC001E-EN 73

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Unit Weight and Rigging

SPREADER BARS

LENGTH

WIDTH

LIFTING POINTS (4 LOCATIONS)

4-point lift

(Models: OAD, OAK, OAN)

SPREADER BARS

LENGTH

WIDTH

LIFTING POINTS (6 LOCATIONS)

DETAIL A

SCALE 1 : 12

6-point lift

(Models: OAD, OAK, OAN)

Figure 52. Rigging and center-of-gravity data (continued)

For rigging instructions, please refer to the Installation, Operation, and Maintenance for your specific product:

• OAU-SVX01*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Indirect Gas-Fired/Electric Heat - Models: OADD, OAKD, OAND)

• OA U-SVX02*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Indirect Gas-Fired/Electric Heat - Model: OABD)

• OA U-SVX003*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Air Source Heat Pump - Models: OADE, OAKE, OANE )

• OAU-SVX005*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit -

74 OAU-PRC001E-EN

Direct Gas-Fired/Electric Heat - Model: OAG)

Page 75

Mechanical Specifications

Horizon Outdoor Air Mechanical Specifications

General

The supply and return openings shall be available as vertical airflow (O AD, O AK, or OAN), ver tical/ horizontal airflow (OAG), or convertible (OAB) between vertical/horizontal. Cooling performance shall be rated in accordance with ETL testing procedures. All units shall be factory assembled, internally wired, fully c harged with R-41 0A, and 1 00 percent run tested to check cooling operation, fan and blower rotation, and control sequence before leaving the factory . Wiring internal to the unit shall be colored and numbered for simplified identification. Units shall be ETL listed and labeled, classified in accordance to UL 1995/CAN/CSA No. 236-M40 for Central Cooling Air Conditioners. Canadian units shall be CSA Certified.

Casing

Unit casing shall be constructed of zinc-coated, heavy gauge, galvanized steel. Exterior surfaces shall be cleaned, phosphatized, and fini shed with a weather-resistant baked enamel finish. Unit’s surface shall be tested 672 hours in a salt spray test in compliance with ASTM B1 17. Unit shall have a 2-inch thick Antimicrobial Insulation with an R-value of 13. All insulation edges shall be either captured or sealed. The unit’s base pan shall have no penetrations within the perimeter of the curb other than the raised downflow supply/return op en in gs to pr ovide an added water integrity precaution, if the condensate drain backs up. The top cover shall be one piece construction or, where seams exist, it shall be double-hemmed and gasket-sealed. The ribbed top adds extra strength and enhances water removal from unit top.

Drain Pan

The drain pan is a single-walled assembly made of Type 304 stainless steel. It is sloped in two planes and is fully drainable. The coils are mounted abo ve the drain pan to allow easy inspection and cleaning of the drain pan.

Refrigeration and Dehumidification Systems

Compressors

All units shall have direct-drive, hermetic, scroll type compressors with centrifugal type oil pumps. Motor shall be suction gas-cooled and shall have a voltage utilization range of plus or minus 10 percent of unit nameplate voltage. Internal overloads shall be provided with the scroll compressors. Each compressor has a crankcase heater to minimize the amount of liquid refrigerant present in the oil sump during off cycles.

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Mechanical Specifications

Evaporator and Condenser Coils

Refer to Figure 53. Internally finned copper tubes mechanically bonded to a configured alumin um plate fin shall be standard. Coils shall be leak tested at the factory to ensure the pressure integrity. The evaporator coil and condenser coil shall be leak tested to 500 psig and pressure tested to 500 psig. The condenser coil shall have a fin design with slight gaps for ease of cleaning. Evaporator coil will have four or six interlaced rows for superior sensible and latent cooling.

Figure 53. Evaporator and reheat coil

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Mechanical Specifications

Refrigerant Capacity Control

Units with standard scroll compressors shall be equipped with Refrigerant Capacity Control (RCC) on the lead circuit to ensure proper modulation of cooling. The RCC uses mechanical means to monitor and inject hot gas into the suction side of the compressor, unloading the compressor in part load conditions. The RCC is factory-set at 114 psig, which will maintain evaporator coil temperature at 38°F.

Units with digital scroll type compressors shall have direct-drive, hermetic compressors with centrifugal type oil pumps. Motor shall be suction gas-cooled and shall have a voltage utilization range of plus or minus 10 percent of unit nameplate voltage. Internal overloads shall be provided with the scroll compressors. Crankcase heaters shall be included. Compressor shall be able to fully modulate from 20 percent to 100 percent.

Figure 54. Refrigerant capacity control

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Mechanical Specifications

Total Energy Wheel (Composite)

The rotating wheel heat exchanger is composed of a rotating cylinder in an insulated cassette frame complete with seals, drive motor, and drive belt. The total-energy recovery wheel is coated with silica gel desiccant permanently bonded by a patented and proprietary process without the use of binders or adhesives, which may degrade desiccant performance. The substrate is a lightweight polymer and will not degrade nor require additional coatings for application in mari ne or coastal environments. Coated segments are washable with detergent or alkaline coil cleaner and water. Desiccant will not dissolve nor deliquesce in the presence of water or high humidity . As the wheel rotates between the ventilation and exhaust air streams it picks up sensible and latent heat energy and releases it into the colder air stream. The driving force behind the exchange is the difference in temperatures between the opposing air streams which is also called the thermal gradient. Bypass dampers will be provided on both the outside and exhaust air paths.

Total Energy Wheel (Aluminum)

The rotor media shall be lightweight and be made of aluminum. The rotor media shall be coated to prohibit corrosion; etched or oxidized surfaces are not acceptable. All surfaces must be coated with a non-migrating adsorbent layer of desiccant prior to being formed into the honeycomb media structure to insure that all surfaces are coated and that adequate latent capacity is provided. The desiccant must be designed for the adsorption of water vapor . The media shall be cleanable with low temperature steam, hot water or light detergent without degrading the latent recovery . Bypass dampers will be provided on both the outside and exhaust air paths.

Figure 55. Total-energy wheel module

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Mechanical Specifications

Supply and Exhaust Fan and Motors (OAD, OAK, and OAN)

Fan motor shall be direct drive type with factory installed V ariable Frequency Drive. All motors shall be thermally protected. All indoor fan motors meet the U.S. Energy Policy Act of 2005 (EPACT).

Refer to Figure 56.

Figure 56. Indoor fan and motor

Supply and Exhaust Fan and Motors (OAB and OAG)

Fan shall be a high efficiency bac kward curved impeller . The motor shall be an electronic commuted motor (ECM) with integrated power electronics.

Supply and Exhaust Fan and Motor (OAG)

Unit will have an FC, centrifugal fan with a belt-driven, adjustable sheave and thermally protected motor. The unit will have an adjustable idler arm assembly for quick adjustment of fan belts and motor sheaves. Indoor fan is equipped with an integrated fan fail switch.

Condenser Fan and Motors

The outdoor fan shall be direct-dri ve, statically and dynamically balanced, draw-through in the vertical disc harge position. The fan motor shall be permanently lubricated and shall have built-in thermal overload protection.

Dampers— Low Leak

The outside air damper has a unit-controlled actuator with parallel-blades. The blade const ruction is a 14-gage g alvan ized steel, roll-formed airfoil-type.

Electrical and Controls

Controls

Unit is completely factory-wired with necessary controls and contactor pressure lugs for power wiring. Units will provide an external location for mounting fused disconnect device. Micro-

OAU-PRC001E-EN 79

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Mechanical Specifications

processor controls are provided for all 24-volt con trol funct ion s. Th e resident con tro l algorithms will make all heating, cooling and/or ventilating decisions in response to electronic signals from sensors measuring outdoor temperature and humidity. The control algorithm maintains accurate temperature control, minimizes drift from set point, and provides better building comfort. A centralized micro-processor (RTRM) will provide anti-short cycle timing for a higher level of machine protection. T erminals are pro vided for a field installed dry contact or switc h closure to put the unit in the Occupied or Unoccupied modes.

Options

Electric Heating Option

Primary heat is supplied using Electr ic Resistance heaters. Heaters shall mee t the requirements of the National Electrical Code and shall be listed by Underwriters Laboratories for zero clearance to combustible surfaces and for use with heat pumps and air conditioning equipment. Heati ng elements shall be open coil, 80 percent nickel, 20 percent chromium, Grade A resistance wire. T ype C alloys containing iron or other alloys are not acceptable. Coils shall be machine crimped into stainless steel terminals extending at least 1 inch into the air stream and all terminal hardware sha ll be stainless steel. Coils shall be supported by ceramic bushings staked into supporting brackets. Heater frames and terminal boxes shall be corrosion resistant steel. Unless otherwise indicated, the terminal box shall be NEMA 1 construction and shall be provided with a hinged, latching cover . Heaters shall be furnished with a disc type, automatic reset thermal cutout for primary over temperature protection. All heaters shall also be furnished with disc type, load-carrying manual reset thermal cutouts, factory wired in series with heater stages for secondary protection. Heat limiters or other fusible over temperature devices are not acceptable. Control will be SCR type. Unit shall be suitable for use with Electric Resistance Heat. Refer to Figure 57.

Figure 57. ER Heater

Indirect Gas-Fired Heating Option

Primary heat is supplied using indirect fired gas heatin g. Th e heatin g sect ion shal l have a progressive tubular heat exchanger design using stainless steel burners and T ype409 stainless

80 OAU-PRC001E-EN

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Mechanical Specifications

steel tubes. An induced draft combustion blower shall be used to pull the combustion products through the firing tubes. The heater shall use a direct spark ignition (DS) system. On initial call for heat, the combustion blower shall purge the heat exc h anger for 20 seconds before ignition. After three unsuccessful ignition attempts, the entire heating system shall be locked out until manually reset at the unit. Units shall be comply with the California requirement for low NO shall be suitable for use with Natural Gas.

emissions. Unit

Direct Gas-Fired Heating Option

The unit will have a fully modulating, high turndown direct-gas fired heat. The heating section will have a 6- or 12-in. direct ga s-fired burner constructed with a cor rosion resistan t aluminum casting and stainless steel baffles.

On an initial call for heat, proper airflow must be verified sensed through a dual-action, factorypreset high/low burner differential air pressure switch prior to initiation of the ignition process. After proving airflow, an electronic ignition controller will begin a 30-second burner chamber prepurge. Following pre-purge a direct spark igniter wi ll ignite the fuel air mixture during a 15-second single-try lock out ignition trial. The microprocessor based RRU Control Module (RRUCM) will supply enable gas to the burner through a direct acting, fully modulating gas valve at a 25 percent firing for 45 seconds following successful ignition. At the end of the 90-second total pre- and postignition cycles, the gas burner w ill modulate to maintain required temperature set points controlled by the RRUCM. After one unsuccessful ig nit ion attempt, the entire heating system will be locked out until manually reset at controller, through a remoter operator display or by removing and reapply power to the unit. Units will be suitable for use with natural gas.

Hydronic Heat Option

A factory installed one, two, or three row hydronic heating coil will be provided downstream of the fan. The unit controller provides a modulating output to control a field-installed wa ter valve and accepts a low temperature limit input signal. Openings in the unit side panels for piping must also be field constructed.

Condenser Hot Gas Reheat

This option shall consist of a modulating hot-gas reheat coil located on the leaving air side of the evaporator coil pre-piped and circuited with a low pressure switch . For detailed unit control and operational modes, please refer to the Sequence of Operations in the Installation, Operat ion, and Maintenance for your specific product:

• OAU-SVX01*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Indirect Gas-Fired/Electric Heat - Models: OADD, OAKD, OAND)

• OA U-SVX02*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Indirect Gas-Fired/Electric Heat - Model: OABD)

• OA U-SVX003*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Air Source Heat Pump - Models: OADE, OAKE, OANE )

• OAU-SVX005*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Direct Gas-Fired/Electric Heat - Model: OAG)

Return Air

Air returns vertically through the unit base. Dampers are low-leak. Each damper has a unitcontrolled actuator. Inputs are provided for unoccupied economizer control, based upon a comparison of the outside air stream to a dry bulb reference point. Refer to Figure 58.

OAU-PRC001E-EN 81

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Mechanical Specifications

Figure 58. Return air damper

Corrosion-Inhibiting Coil Coating

The indoor and outdoor coils have a four to six mil protective coating applied by a multiple dip and bake process.

Corrosion-Inhibiting Cabinet Coating

Additional options include all stainless steel construction, stainless interior walls with prepainted exterior walls, ECO-coated coils, and stainless steel coil housing.

Filters

Adjustable 6-inch filter rack with options for 2-inch MERV-8, 2-inch MERV-13, and 4-inch MERV -14 installed just upstream of the evaporator coil. In addi tion, 2-inc h aluminum mesh mist eliminators are located in the intake hood for OAD, OAK, and OAN; a bird screen is provided for OAB and OAG. Other options include 120 V UVC downstream of the evaporator coil, and 2-inch, 24 V electrostatic filters.

Filter Status Switch

This option indicates when filters require cleaning or replacement. The Filter Statu s switch triggers an information-only diagnostic message on the human interface and will allow continued unit operation.

Non-Fused Disconnect Switch

A 3-pole, molded case, disconnect switch with provisions for through the base electrical connections shall be installed. The disconnect switch will be installed in the unit in a water tight enclosure. Wiring will be provided from the switch to the unit high voltage terminal block. The switch will be UL/CSA agency recognized. The disconnect switch will be sized per NEC and UL guidelines but will not be used in place of unit overcur rent protection.

82 OAU-PRC001E-EN

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Mechanical Specifications

Convenience Outlet

A convenience outlet is provided on the control side of the unit. The GFI outlet is 115 volt, and capable of manual resetting.

Figure 59. Convenience outlet

Roof Mounting Curb

The roof mounting curb is fabricated of 14-gage galvanized steel with a nominal 2-inch x 2-inch nailer setup. The curb ships knocked down with a curb gasket. Curb height options are 14 or 24 inches.

OAU-PRC001E-EN 83

Page 84

Appendix

OAU Filter Guide

Table 23. OAB Units

Evaporator

Thickness MERV Qty Height Width

2 in. 8, 13 2 20 24 4in. 14 2 20 24

Auxiliary Module

Return Air

Thickness MERV Qty Height Width

2 in. 8 4 20 24

Outside Air

Thickness MERV Qty Height Width

2 in. 8 4 20 24

(a)No filters will be provided on the outside air path of the auxiliary module

if electric preheat is provided.

Table 24. OAD Units

Evaporator

Thickness MERV Qty Height Width

2 in. 8, 13

4in. 14

Auxiliary Module

Return Air

Thickness MERV Qty Height Width

2 in. 8 2 20 24

Outside Air

Thickness MERV Qty Height Width

2 in. 8 2 20 24

Inlet

Thickness Material Qty Height Width

2 in. Aluminum Mesh 3 16 25

(a)No filters will be provided on the outside air path of the auxiliary module

if electric preheat is provided.

(a)

216 20 216 25 216 20 216 25

(a)

Table 25. OAG Units

Evaporator

Thickness MERV Qty Height Width

2 in. 8, 13 6 16 24 4in. 14 6 16 24

Auxiliary Module

Return Air

Thickness MERV Qty Height Width

2 in. 8 6 16 24

Outside Air

Thickness MERV Qty Height Width

2 in. 8 6 16 24

(a)No filters will be provided on the outside air path of the auxiliary module

if electric preheat is provided.

84 OAU-PRC001E-EN

(a)

Page 85

Table 26. OAK Units

Evaporator

Thickness MERV Qty Height Width

2 in. 8, 13 9 20 18 4in. 14 6 20 25

Auxiliary Module (46XX ERV)

Return Air

Thickness MERV Qty Height Width

2in. 8

Outside Air

(a)

225 20 125 16

Thickness MERV Qty Height Width

2in. 8

225 20 125 16

Auxiliary Module (58XX/ 64XX ERV)

Return Air

Thickness MERV Qty Height Width

2 in. 8 8 20 18

Outside Air

(a)

Thickness MERV Qty Height Width

2 in. 8 8 20 18

Inlet

Thickness Material Qty Height Width

2 in. Aluminum Mesh 6 20 20

(a)No filters will be provided on the outside air path of the auxiliary module

if electric preheat is provided.

Table 27. OAN Units

Evaporator

Thickness MERV Qty Height Width

2 in. 8, 13 9 24 20 4in. 14 9 24 20

Auxiliary Module (58XX ERV)

Return Air

Thickness MERV Qty Height Width

2 in. 8 6 18 20

Outside Air

Thickness MERV Qty Height Width

2 in. 8 6 18 20

Auxiliary Module (68XX / 74XX ERV)

Return Air

Thickness MERV Qty Height Width

2 in. 8 8 25 20

Outside Air

Thickness MERV Qty Height Width

2 in. 8 8 25 20

Inlet

Thickness Material Qty Height Width

2 in. Aluminum Mesh 10 16 25

(a)No filters will be provided on the outside air path of the auxiliary module

if electric preheat is provided.

(a)

Appendix

OAU-PRC001E-EN 85

Page 86

Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, the leader in creating and sustaining safe, comfortable and energy efficient environments, Trane offers a broad portfolio of advanced controls and HVAC systems, comprehensive building services, and parts. For more information, visit www.Trane.com.

Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications with out notice .

We are committed to using environmentally conscious print practices that reduce waste.

Trane OABD, OABE, OADD, OADE, OAGD Catalogue

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

The Horizon Outdoor Air Unit...

Model Number Descriptions

Horizon Outdoor Air Unit

Models: OABD, OAGD

Models: OADD, OADE, OAKD, OAKE, OAND, OANE

Features and Benefits

Indoor Air Quality (IAQ) Features

Energy Efficiency

High Quality and Durability

Advanced Controls

Flexibility

Enhanced Serviceability

Standard Unit Features

Standard Control Features

Optional Features

Application Considerations

Overview

Outdoor Air Unit Functions

System Configurations

Horizon OAU Operation

OAU with Reheat

Dehumidification

Cooling or Heating

OAU Outdoor Air Control without Reheat

Dehumidification

Cooling or Heating

Establishing Capacity Requirements

Cooling & Dehumidification Selection Criteria

Evaporator Design Entering Conditions

Evaporator Design Leaving Conditions

Reheat

Heating

Capacity Control

Discharge Air Control

Cooling Setpoint

Unoccupied Space Humidity Control

Space Control

Outdoor Airflow Balancing

Air to Air Energy Recovery

Controlling the Total-Energy Wheel

Cross Leakage

Condensate Drain Configuration

Acoustical Considerations

Clearance Requirements

Duct Design

Controls Sequence

Selection Procedure

Horizon OAU Selection Procedure

General Data

OAB Units

Unit Clearances

Curb Dimensions

Dimensional Data

OAD Units

Unit Clearances

Curb Dimensions

Dimensional Data

Indirect-Fired OAG Units

Unit Clearances

Curb Dimensions

Dimensional Data

Direct-Fired OAG Units

Unit Clearances

Curb Dimensions

Dimensional Data

OAK Units

Unit Clearances

Curb Dimensions

Dimensional Data

OAN Units

Unit Clearances

Curb Dimensions

Dimensional Data

Indirect Gas-fired Furnace Heater and Power

Unit Weight and Rigging