Trane OABE, OADE, OAKE, OANE Catalogue

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Page 1

Product Catalog

Horizon™ Outdoor Air Unit Water Source Heat Pump For 100% Outdoor Air Applications

Models: OABE, OADE, OAKE, OANE

August 20 14

OAU-PRC003A-EN

Page 2

Introduction

HIGH TURNDOWN INDIRECT GAS-FIRED BURNER

OPTIONAL RETURN-AIR

WITH EASY TO READ HUMAN INTERFACE

PLUS 2" MAXIMUM EXTERNAL CAPACITY

DAMPER

WITH STAINLESS STEEL HEAT EXCHANGER

MICROPROCESSOR BASED CONTROL

REHEAT COIL SEPARATED

FROM EVAPORATOR

FOR ERV, POWERED EXHAUST, AND

SECONDARY ELECTRIC HEAT OPTIONS

SLIDE IN FILTER FRAMES WITH

6" MAXIMUM INTERNAL CAPACITY

AVAILABLE AUXILIARY CABINET

2" SOLID DOUBLE WALL

WITH FOAM INSULATION

DIGITAL SCROLL

COMPRESSORS

DIRECT DRIVE PLENUM FAN WITH

SLIDE OUT SERVICE ACCESS

INTERLACED EVAPORATOR COIL WITH STAINLESS STEEL

DRAIN PAN

The Horizon Outdoor Air Unit Water Source Heat Pump...

The T rane Horizon™ Outdoor Ai r Water Source Heat P ump 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-PRC003A-EN (10 Aug 2014)

• First version of this literature

Page 3

Table of Contents

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

Model Number Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Horizon Outdoor Air Unit Water Source Heat Pump . . . . . . . . . . . . . . . . . . . 5

Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Application Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

System Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Horizon OAU Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

OAU with Reheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

OAU Outdoor Air Control without Reheat . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Establishing Capacity Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Cooling & Dehumidification Selection Criteria . . . . . . . . . . . . . . . . . . . . . . . 17

Outdoor Airflow Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Air to Air Energy Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

The Horizon Outdoor Air Unit Water Source Heat Pump... . . . . . . . . . . . . 2

Model: OABE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Models: OADE, OAKE, OANE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Indoor Air Quality (IAQ) Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Energy Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

High Quality and Durability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Advanced Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Flexibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Enhanced Serviceability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Standard Unit Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Standard Control Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Outdoor Air Unit Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Dehumidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Cooling or Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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

Cooling or Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Evaporator Design Entering Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Evaporator Design Leaving Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Reheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Discharge Air Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Cooling Setpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Unoccupied Space Humidity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Space Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Controlling the Total-Energy Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Cross Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

OAU-PRC003A-EN 3

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Condensate Drain Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Acoustical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Clearance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Duct Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Controls Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Horizon OAU WSHP Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Unit Clearances, Curb Dimensions, and Dimensional Data . . . . . . . . . . . . . . . 34

OABE Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Unit Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Curb Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

OADE Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Unit Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Curb Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

OAKE Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

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

Curb Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

OANE Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Unit Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Curb Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Unit Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Unit Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Horizon Outdoor Air Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . 58

Refrigeration and Dehumidification Systems . . . . . . . . . . . . . . . . . . . . . . 58

Electrical and Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

OAU Filter Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

4 OAU-PRC003A-EN

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Model Number Descriptions

Horizon Outdoor Air Unit Water Source Heat Pump

Model: OABE

Typical model number (example):

OABE036A4 -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

Digit 4 — Major Design Sequence

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

Digit 8 — Minor Design Sequence

A B

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

B = DX 4-Row C = DX 4-Row Interlaced 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

B = Digital Scroll—1st Circuit Only C = Digital Scroll—1 D = Variable Speed Scroll—1

E = Variable Speed Scroll—1

Circuit Only

Circuit

and 2nd Circuit

and

Digit 14 — Condenser

3 = Water-Cooled DX Condenser

Copper/Steel

8 = Water-Cooled DX Condenser

Copper/Nickel

Digit 15 — Refrigerant Capacity Control

0 = No RCC Valve

Digit 16 — Indoor Fan Motor (IFM)

0 = ECM w/Backward Curved

Plenum Fan

4 = Special Motor Option

Digit 17 — Indoor Fan Wheel

A = 355 B = 450

Digit 18 — Indoor Fan Motor (hp)

A = 1 kW–1.5 hp B = 2 kW–2.5 hp C = 3 kW–4.0 hp

Digit 19 — Reserved for Future Use

Digit 20 — Heater Type (PRI/SEC)

0 = No Auxiliary 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 Auxiliary Heat 1=Natural Gas 2=Propane 3 = Electric—Open Coil 4 = Electric—Sheathed Coil 5=Hot Water 6=Steam

Digit 22 — Heater Capacity— Primary Heat Source

IF ELEC

0 = No Auxiliary

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 = 32 kW H = 40 kW J = 48 kW X = Special Heater Option

No Auxiliary Heat

Digit 23 — Heat Capacity— Secondary Heat Source

ELEC DF

0 = No Heat/No Secondary Heat A = 5 kW 300 MBh B=10 kW C=15 kW 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,

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 Evap, HGRH Coils

Eco-Coated Coils

OAU-PRC003A-EN 5

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Model Number Descriptions

OABE Units

Digit 25, 26 — Unit Controls

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

AB = Trane—Space Control w/LON AC = Trane—Discharge Air Control AD = Trane—Space Control AF = Trane—Discharge Air Control AG = Trane—Space Control AI = Trane—Discharge Air Control AJ = Trane—Space Control AK = Trane—Multi-Zone VAV Control AL = Trane—Multi-Zone VAV Control AM = Trane—Multi-Zone VAV Control AN = Trane—Multi-Zone VAV Control AO = Trane—Single-Zone VAV Control AP = Trane—Single-Zone V AV Control AQ = Trane—Single-Zone VAV Control AR = Trane—Single-Zone VAV Control

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 — Po wered Exhaust Fan Motor (PFM) and Exhaust Dampers

0 = No Powered Exhaust 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 — Po wered Exhaust Fan Wheel

0 = No Powered Exhaust A = 355

Digit 29 — Po wered Exhaust Fan Motor HP

0 = No Powered Exhaust A = 1 kW–1.5 hp B = 2 kW–2.5 hp C = 3 kW–4.0 hp

DIGIT 30 — Reserved for Future Use

Digit 31 — ERV (Requires Powered Exhaust)

0=No ERV A = ERV—Composite Construction

w/Bypass

B = ERV—Composite Construction

with Frost Protection w/VFD

C = ERV—Aluminum Construction

w/Bypass

D = ERV—Aluminum Construction

with Frost Protection w/VFD

Digit 32 — ERV Size

0=No ERV 1=3014 2 = 3622

Digit 33 — Damper Options

0 = 100% OA 2-Position Damper 1 = 100% OA 2-Position Damper

w/RA 2-Position Damper

2 = Modulating OA and RA Dampers

w/Economizer

Digit 34 — Filtration Options

A = No Filters B = MERV-8, 30% C = MERV-13, 80% D = MERV-14, 95% E = MERV-8 30%, MERV-13 80% F = MERV-8 30%, MERV-14 95% G = MERV-8, 30%, and UVC H = MERV-13, 80%, with UVC J = MERV-14, 95%, with UVC K = MERV-8 30%, MERV-13 80%,

and UVC

L = MERV-8 30%, MERV-14 95%,

and UVC 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%,

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

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

Detectors

Digit 36 — Electrical Options

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

w/Convenience Outlet

D = Fused Disconnect Switch

w/Convenience Outlet E = Dual Point Power F = Dual Point Power

w/Convenience Outlet G = 65 SCCR Electrical Rating

w/Non-Fused Disconnect H = 65 SCCR Electrical Rating

w/Fused Disconnect J = 65 KAIC Electrical Rating

w/Non-Fused Disconnect K = 65 KAIC Electrical Rating

w/Fused Disconnect

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 B = 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

6 OAU-PRC003A-EN

Page 7

Model Number Descriptions

Models: OADE, OAKE, OANE

Typical model number (example):

OAKE300A4-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

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

3 = 208-230/60/3 4 = 460/60/3 5 = 575/60/3

Digit 10 — Reserved for Future Use

Digit 11 — Evaporator Type

B = DX 4-Row C = DX 4-Row Interlaced

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

B = Digital Scroll—1st Circuit Only C = Digital Scroll—1 D = Variable Speed Scroll—1

E = Variable Speed Scroll—1

Circuit Only

Circuit

and 2nd Circuit

and

Digit 14 — Condenser

3 = Water-Cooled DX Condenser 8 = Water-Cooled DX Condenser

Copper/Steel Copper/Nickel

Digit 15 — Refrigerant Capacity Control

0 = No RCC Valve

Digit 16 — Indoor Fan Motor (IFM)

0 = Direct Drive w/VFD 1 = Direct Drive (VFD by Others) 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 Auxiliary Heat 1=Natural Gas 2=Propane 3 = Electric—Open Coil 4 = Electric—Sheathed Coil 5=Hot Water 6 = Steam

OAU-PRC003A-EN 7

Page 8

Model Number Descriptions

OADE, OAKE, OANE Units

Digit 22 — Heat Capacity— Primary Heat Source

IF ELEC

0 = No Auxiliary

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

No Auxiliary Heat

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 Evap, HGRH Coils

Eco-Coated 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 VAV Control AP = Trane—Single-Zone V AV Control AQ = Trane—Single-Zone VAV 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

8 OAU-PRC003A-EN

Page 9

Model Number Descriptions

OADE, OAKE, 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 Da mpers

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 B = 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-PRC003A-EN 9

Page 10

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-inch double-wall panels and 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 with easy-to-read human interface and display for monitoring, setting, editing, and controlling.

• 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™

10 OAU-PRC003A-EN

Page 11

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)

• Dual fuel (indirect/electric) option

•Custom colors

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

Pump

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

• Water-cooled DX refrigeration system

• Completely factory-piped and leak-tested refrigeration system

• Stainless steel drain pans sloped in two planes

• Digital scroll compressors

OAU-PRC003A-EN 11

Page 12

Features and Benefits

• 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

Standard Control Features

• Fully integrated, factory-installed and commissioned microelectronic controls

• Supply airflow proving

• Emergency stop

• Occupied/unoccupied control modes

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

• Clogged filter switch

• Low ambient control down to 0°F

Optional Features

• Modulating electric heat

•Hot water coils

• Steam heat (future)

• Low leak parallel blade return air damper with edge seals

• Modulating damper control systems

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

• 24 V electrostatic filters

• 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

• LED service lights

• Direct drive BI airfoil plenum fan

• Factory-installed variable frequency drive (VFD)

• Unit mounted human interface panel

12 OAU-PRC003A-EN

Page 13

Application Considerations

Overview

Outdoor Air Unit Functions

The Horizon™ Outdoor Air Unit (OAU) provides conditioned outdoor air suitable for mec hanical 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. 13 and Figure 5, p. 15, Figure 6, p. 15, and Figure 8, p. 16 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. 13.

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. 14.

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-PRC003A-EN 13

Page 14

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

14 OAU-PRC003A-EN

Figure 4, p. 14 shows the OAU system with a DX refrigerant circuit design using reheat.

Figure 4. Refrigeration system diagram with reheat

Consider Figure 5, p. 15. 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 15

Application Considerations

Dry Bulb Temperature

Dewpoint Temperature

Wet Bulb Temperature

heating

cooling

At h1, 100 percent outdoor air enters the O AU . Th e O A U 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-PRC003A-EN 15

Consider Figure 6, p. 15. 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 OA U . The O A U 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. 16 shows the Horizon™ OAU DX system, using a refrigerant circuit design without

reheat.

Note: Space control not available without reheat.

Page 16

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. 16. 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. 17. 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.

16 OAU-PRC003A-EN

Page 17

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-PRC003A-EN 17

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. 18, Table 2, p. 18, and Table 3, p. 19 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 18

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

18 OAU-PRC003A-EN

Page 19

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 OA U has electric, heat pump, or g as heat option s. The elec tric he at 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 size and unit airflow . Cal cul at e the tem perature rise to confirm that it provides acceptable control. The electric heat will modulate 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. 17, the Outdoor Air Unit will limit the space relative humidity to the target level.

OAU-PRC003A-EN 19

Page 20

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 . Resetting 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. 20 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 Sequ ence) 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

20 OAU-PRC003A-EN

Page 21

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. 21 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. 20).

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

OAU-PRC003A-EN 21

Page 22

Application Considerations

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

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 drain 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-SVX004*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Water Sou r ce Heat Pump - Model: OABE, OADE, OAKE, OANE)

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 10feet 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”.

Figure 12. Condensate trap installation

22 OAU-PRC003A-EN

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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: offices, 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 transmissio n 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.

Application Considerations

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 warm condenser air recirculation. If the recommended clearances are not possible on a par ticular 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.

OAU-PRC003A-EN 23

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Application Considerations

Controls Sequence

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

• OAU-SVX004*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Water Sou r ce Heat Pump - Model: OABE, OADE, OAKE, OANE)

24 OAU-PRC003A-EN

Page 25

Selection Procedure

Horizon OAU WSHP 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. Entering Water Temperature (EWT) Cooling

3. Fluid Flow

4. Fluid Type (Water, Propylene, or Ethylene)

5. Volume Glycol (if Propylene or Ethylene is used)

6. EAT—Heating

7. EWT—H ea ti ng

8. Condenser Material (copper inner tubes are recommended for fresh and cooling tower water applications while cupro-nickel is recommended for ground and sea water applications)

9. CFM a. Total CFM b. Outdoor Air CFM

10. External Static Pressure

11. Altitude

12. Electrical Voltage/Phase/Hertz

13. Heat Type

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.

OAU-PRC003A-EN 25

Page 26

General Data

Table 4. OABE General Data—Cooling 3–5 Ton s H igh Efficiency

3 Tons 4 Tons 5 Tons

OABE036A OABE048A OABE060A

Performance

Gross Cooling Capacity, Btu (kW) 41,800 (12.25) 57,439 (16.83) 70,304 (20.60) Gross Heating Capacity, Btu (kW) Nominal cfm (m

/h) 500–2000 (849–3398) 500–2000 (849–3398) 500–2000 (849–3398)

Compressor

Number 1 1 / Scroll 1 / Scroll Type

Fluid/Refrigerant Water Coil

Type Coaxial Coaxial Coaxial Connection Size/Circuit, in. (mm) 3/4 (19.05) 3/4 (19.05) 1 (25.4) Pressure Drop/Circuit, ft wc (kPa) 4.3 (12.85) 6.4 (19.13) 4.8 (14.35) Water Flow/Circuit, gpm (L/s) 9 (0.57) 12 (0.76) 15 (0.95)

Indoor Coil

Type High Performance High Performanc e High Performance Tube Size—OD, i n. (mm) Face Area, ft Rows FPI Refrigerant Control Drain Connection Size, in. (mm)

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

Indoor Fan

Type Backward Curved Backward Curved Backward Curved Number Used Diameter Drive Type Number Motors Motor HP (kW), Standard–Oversized Motor RPM

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

36,779 (10.78) 44,667 (13.09) 63,402 (18.58)

Scroll 1 / Scroll 1 / Scroll

1/2 (12.7) 1/2 (12.7) 1/2 (12.7)

4 4 4

12 12 12

TXV TXV TXV

3/4 (19.05) 3/4 (19.05) 3/4 (19.05)

1 1 1

Varies Varies Varies

Direct Drive Direct Drive Direct Drive

1 1 1

2.68–4.0 (2–3) 2.68–4.0 (2–3) 2.68–4.0 (2–3) Varies Varies Varies

See Nameplate See Nameplate See Nameplate

26 OAU-PRC003A-EN

Page 27

General Data

OABE Units

Table 5. OABE General Data—Cooling 6–9 Ton s H igh Efficiency

6 Tons 7 Tons 8 Tons 9 Tons

OABE072A OABE084A OABE096A OABE108A

Performance

Gross Cooling Capacity, Btu (kW) 81,059 (23.76) 93,010 (27.26) 105,293 (30.86) 115,859 (33.95) Gross Heating Capacity, Btu (kW) Nominal cfm (m

/h) 625–3000 (1062–5097) 625–3000 (1062–5097) 625–3000 (1062–5097) 625–3000 (1062–5097)

Compressor

Number 1 1 1 1 Type Scroll Scroll Scroll Scroll

Fluid/Refrigerant Water Coil

Type Coaxial Coaxial Coaxial Coaxial Connection Size/Circuit, in. (mm) Pressure Drop/Circuit, ft wc (kPa) Water Flow/Circuit, gpm (L/s)

Indoor Coil

Type High Performance High Performance High Performance High Performance Tube Size—OD, i n. (mm) Face Area, ft Rows FPI Refrigerant Control Drain Connection Size, in. (mm)

(m2) 6.56 (0.61) 6.56 (0.61) 6.56 (0.61) 6.56 (0.61)

Indoor Fan

Type Backward Curved Backward Curved Backward Curved Backward Curved Number Used Diameter Drive Type Number Motors Motor HP (kW), Standard–Oversized Motor RPM

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

75,344 (22.08) 85,183 (24.96) 100,455 (29.44) 108,943 (31.93)

1 (25.4) 1 (25.4) 2 (50.8) 2 (50.8)

6.3 (18.83) 8.2 (24.51) 5.9 (17.64) 7.4 (22.12) 18 (1.14) 21 (1.32) 24 (1.51) 27 (1.70)

1/2 (12.7) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7)

4 4 4 4

12 12 12 12

TXV TXV TXV TXV

3/4 (19.05) 3/4 (19.05) 3/4 (19.05) 3/4 (19.05)

1 1 1 1

Varies Varies Varies Varies

Direct Drive Direct Drive Direct Drive Direct Drive

1 1 1 1

2.68-4.0 (2-3) 2.68-4.0 (2-3) 2.68-4.0 (2-3) 2.68-4.0 (2-3) Varies Varies Varies Varies

See Nameplate See Nameplate See Nameplate See Nameplate

OAU-PRC003A-EN 27

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General Data

OADE Units

Table 6. OADE Gener a l Data—Cooling 5–8 Tons High Efficiency

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

OADE060A OADE072A OADE084 OADE096

Performance

Gross Cooling Capacity, Btu (kW) 71,522 (20.96) 81,032 (23.75) 101,129 (29.64) 110,880 (32.50) Gross Heating Capacity, Btu (kW) 63,292 (18.55) 74,463 (21.82) 82,750 (24.25) 101,852 (29.85) Nominal cfm (m

Compressor

Number 1112 Type Scroll Scroll Scroll Scroll

Fluid/Refrigerant Water Coil

Type Coaxial Coaxial Coaxial Coaxial Connection Size/Circuit, in. (mm) 1 (25.4) 1 (25.4) 1 (25.4) 1/1 (25.4/25.4) Pressure Drop/Circuit, ft wc (kPa) 4.8 (14.35) 7.9 (23.61) 8.2 (24.51) 6.4/6.4 (19.13/19.13) Water Flow/Circuit, gpm (L/s) 15 (0.95) 18 (1.14) 21 (1.32) 12/12 (0.76/0.76)

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 (19.05) 3/4 (19.05) 3/4 (19.05) 3/4 (19.05)

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 1.0–3.0 1.0–3.0 1.0–5.0 Motor RPM 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

/h) 625–1250 (1062–2124) 750–1500 (1274–2548) 875–1750 (1487–2973) 1000–2000 (1699–3398)

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

Guide” in “Appendix, ”

p. 65

Refer to “OAU Filter

Guide” in “Appendix,”

p. 65

Refer to “OAU Filter

Guide” in “Appendix,”

p. 65

Refer to “OAU Filter

Guide” in “Appendix,”

p. 65

28 OAU-PRC003A-EN

Page 29

General Data

OADE Units

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

10 Tons Downflow 12 Tons Downflow 15 Tons Downflow

OADE120A OADE144A

Performance

Gross Cooling Capacity, Btu (kW) 143,044 (41.92) 162,064 (47.50) 202,258 (59.28) Gross Heating Capacity, Btu (kW) 126,584 (37.10) 148,926 (43.65) 165,500 (48.50) Nominal cfm (m

/h) 1250–2500 (2124–4247) 1500–3000 (2548–5097) 1500–3000 (2548–5097)

Compressor

Number 222 Type Scroll Scroll Scroll

Fluid/Refrigerant Water Coil

Type Coaxial Coaxial Coaxial Connection Size/Circuit, in. (mm) 1/1 (25.4/25.4) 1/1 (25.4/25.4) 1/1 (25.4/25.4) Pressure Drop/Circuit, ft wc (kPa) 4.8/4.8 (14.35/14.35) 7.9/7.9 (23.61/23.61) 8.2/8.2 (24.51/24.51) Water Flow/Circuit, gpm (L/s) 15/15 (0.95/0.95) 18/18 (1.14/1.14) 21/21 (1.32/1.32)

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 Drain Connection Size, in. (mm) 3/4 (19.05) 3/4 (19.05) 3/4 (19.05)

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

Indoor Fan

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

Oversized)

Varies Varies

Filters

Type Furnished Refer to “OAU Filter Number/Size Recommended

Guide” in “Appendix,”

p. 65

Refer to “OAU Filter

Guide” in “Appendix,”

p. 65

Refrigerant Charge, lb of R-410A

Downflow See Nameplate See Nameplate See Nameplat e

OADE180A

TXV

Direct Drive

1.0–5.0

1750–3500

Varies

Refer to “OAU Filter

Guide” in “Appendix,”

p. 65

OAU-PRC003A-EN 29

Page 30

General Data

OAKE Units

Table 8. OAKE Gener a l Data—Cooling 12–20 Tons High Efficiency

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

OAKE144A OAKE180A OAKE210A OAKE240A

Performance

Gross Cooling Capacity, Btu (kW) 164,280 (48.15) 208,912 (61.23) 239,236 (70.11) 279,374 (81.88) Gross Heating Capacity, Btu (kW) 148,018 (43.38) 190,654 (55.88) 208,973 (61.24) 219,466 (64.32) Nominal cfm (m

Compressor

Number 2222 Type Scroll Scroll Scroll Scroll

Fluid/Refrigerant Water Coil

Type Coaxial Coaxial Coaxial Coaxial Connection Size/Circuit, in. (mm) 1/1 (25.4/25.4) 1/1 (25.4/25.4) 2/2 (50.8/50.8) 2/2 (50.8/50.8) Pressure Drop/Circuit, ft wc (kPa) 7.9/7.9 (23.61/23.61) 8.2/8.2 (24.51/24.51) 7.0/7.0 (20.92/20.92) 9.0/9.0 (26.90/26.90) Water Flow/Circuit, gpm (L/s) 18/18 (1.14/1.14) 21/21 (1.32/1.32) 26.25/26.25 (1.66/1.66) 30/30 (1.89/1.89)

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)

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 1–5.0 1–7.5 1–7.5 Motor RPM 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

/h) 1500–3000 (2548–5097) 1875–3750 (3186–6371) 2125–4250 (3610–7221) 2500–5000 (4247–8495)

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

Guide” in “Appendix,”

p. 65

Refer to “OAU Filter

Guide” in “Appendix, ”

p. 65

Refer to “OAU Filter

Guide” in “Appendix,”

p. 65

Refer to “OAU Filter

Guide” in “Appendix,”

p. 65

30 OAU-PRC003A-EN

Page 31

General Data

OAKE Units

Table 9. OAKE General Data—Cooling 22–30 Tons Hi gh Efficiency

22 Tons Downflow 25 Tons Downflow 30 Tons Downflow

OAKE264A OAKE300A OAKE360A

Performance

Gross Cooling Capacity, Btu (kW) 314,806 (92.26) 348,788 (102.22) 394,638 (115.66) Gross Heating Capacity, Btu (kW) 289,850 (84.95) 328,446 (96.26) 368,582 (108.02)

Nominal cfm (m3/h)

2750–5500

(4672–9344)

Compressor

Number 222 Type Scroll Scroll Scroll

Fluid/Refrigerant Water Coil

Type Coaxial Coaxial Coaxial Connection Size/Circuit, in. (mm) 2/2 (50.8/50.8) 2/2 (50.8/50.8) 2/2 (50.8/50.8) Pressure Drop/Circuit, ft wc (kPa) 11.7/11.7 (34.97/34.97) 13.2/13.2 (39.46/39.46) 18.6/18.6 (55.60/55.60) Water Flow/Circuit, gpm (L/s) 33/33 (2.08/20.8) 37.5/37.5 (2.37/2.37) 45/45 (2.84/2.84)

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) 1 (25.4) 1 (25.4) 1 (25.4)

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

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 1–7.5 1.0–15.0 1.0–15.0 Motor RPM 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. 65

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. 65

3750–7500

(6371–12742)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 65

OAU-PRC003A-EN 31

Page 32

General Data

OANE Units

Table 10. OANE General Data—Cooling 30–40 Tons High Efficiency

30 Tons Downflow 35 Tons Downflow 40 Tons Downflow

OANE360A OANE420A OANE480A

Performance

Gross Cooling Capacity, Btu (kW) 407,716 (119.49) 481,429 (141.09) 487,406 (142.84) Gross Heating Capacity, Btu (kW) 371,280 (108.81) 471,287 (138.12) 477,756 (140.02)

Nominal cfm (m3/h)

3750–7500

(6371–12742)

Compressor

Number 233 Type Scroll Scroll Scroll

Fluid/Refrigerant Water Coil

Type Coaxial Coaxial Coaxial Connection Size/Circuit, in. (mm) 2/2 (50.8/50.8) 2/2.5 (50.8/63.5) 2/2.5 (50.8/63.5) Pressure Drop/Circuit, ft wc (kPa) 18.6/18.6 (55.60/55.60) 10.4/9.2 (31.09/27.50) 16.0/13.7 (47.83/40.95) Water Flow/Circuit, gpm (L/s) 45/45 (2.84/2.84) 31/63 (1.96/3.97) 39/78 (2.46/4.92)

Indoor Coil

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

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 1.5–15 2.0–15 Motor RPM 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. 65

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. 65

5000–10000

(8495–16990)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 65

32 OAU-PRC003A-EN

Page 33

General Data

OANE Units

Table 11. 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) 580,516 (170.13) 707,260 (207.28) 762,312 (223.41) Gross Heating Capacity, Btu (kW) 535,250 (156.87) 696,574 (204.15) 722,794 (226.48)

Nominal cfm (m3/h)

5625–11250

(9557–19114)

Compressor

Number 344 Type Scroll Scroll Scroll

Fluid/Refrigerant Water Coil

Type Coaxial Coaxial Coaxial Connection Size/Circuit, in. (mm) 2/2.5 (50.8/63.5) 2.5/2.5 (63.5/63.5) 2.5/2.5 (63.5/63.5) Pressure Drop/Circuit, ft wc (kPa) 14.9/12.4 (44.54/37.06) 12.8/12.8 (38.26/38.26) 12.4/12.4 (37.06/37.06) Water Flow/Circuit, gpm (L/s) 40/80 (2.52/5.05) 75/75 (4.73/4.73) 80/80 (5.05/5.05)

Indoor Coil

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

Indoor Fan

Type Backward Inclined Backward Inclined Backward Inclined Number Used 1 or 2 1 or 2 1 or 2 Diameter 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 3.0-15 3.0-15 Motor RPM 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. 65

Refrigerant Charge, lb of R-410A

Downflow See Nameplate See Nameplate See Nameplate

6250–12500

(10619–21237)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 65

6750–13500

(11468–22936)

Refer to “OAU Filter

Guide” in “Appendix,”

p. 65

OAU-PRC003A-EN 33

Page 34

Unit Clearances, Curb Dimensions, and Dimensional

7'-0"

9'-6

13 16

END TO END

3'-0"

4'-0"

3'-0"

Data

OABE Units

Unit Clearances

Figure 13. Typical installation clearances for OABE unit

6'-0"

34 OAU-PRC003A-EN

Page 35

Unit Clearances, Curb Dimensions, and Dimensional Data

7'-0"

6'-0"

3'-0"

4'-0"

3'-0"

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

OABE Units

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

OAU-PRC003A-EN 35

Page 36

Unit Clearances, Curb Dimensions, and Dimensional Data

" 2

1 2

GUTTER B DETAIL

"5 27

3 4

42"

10 "

"2 48

"2 93

25 "

46 "

" 10

3 8

7 8

GUTTER B

DETAIL A - GUTTER

SCALE 1 : 14

3 3/4" 3 1/2"

93 1/2"

48 1/2"

46 1/8"

12 7/8"

13 5/8"

25 1/8"

42"

14 3/4"

11 1/4"

27 5/8"

10 1/2"

10 1/2" 38 1/2"

38 3/4"

135 3/4"

DETAIL B - PIPE CHASE GUTTER

SCALE 1 : 12

2 3/8"

3 1/2"

OABE Units

Curb Dimensions

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

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

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

36 OAU-PRC003A-EN

Page 37

Dimensional Data

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

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5,*+76,'(9,(:

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

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



(/(&75,&

',6&211(&7

)52179,(:

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7239,(:

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

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

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

5,*+76,'(9,(:









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



(/(&75,&

',6&211(&7

)52179,(:

  

 















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7239,(:

Unit Clearances, Curb Dimensions, and Dimensional Data

OABE Units

Figure 17. Unit dimensional data for OABE 3–9 tons (in.)

Figure 18. Unit dime nsional data for OABE 3–9 tons with auxiliary cabinet (in.)

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

OAU-PRC003A-EN 37

Page 38

Unit Clearances, Curb Dimensions, and Dimensional Data

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

OABE Units

Figure 19. OABE indirect gas-fired furn ace heater and power

38 OAU-PRC003A-EN

Page 39

Unit Clearances, Curb Dimensions, and Dimensional Data

CLEARANCE 36"

CLEARANCE 48"

OF UNIT 72"

CLEARANCE FROM TOP

CLEARANCE 36"

4'-0"

3'-0"

4'-0"

3'-0"

OADE Units

Unit Clearances

Figure 20. Typical installation clearances for OADE unit

OAU-PRC003A-EN 39

Page 40

Unit Clearances, Curb Dimensions, and Dimensional Data

7'-0"

6'-0"

53"

4'-0"

3'-0"

36"

OADE Units

Figure 21. Typical installation clearances for OADE unit with auxiliary cabinet

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

40 OAU-PRC003A-EN

Page 41

Curb Dimensions

" 2

7 8

GUTTER B DETAIL

SUPPLY

RETURN

GUTTER B

28 3/4"

17"

19"

10 1/2"

49"

45 1/2"

"4 29

"1 24

1 2

2 7/8"

" 2

7 8

SUPPLY

40"

127

"2 36

"8 4

28 3/4"

17"

19"

10 1/2"

49"

45 1/2"

" 24

1 2

2 7/8"

GUTTER B

GUTTER A

RETURN

GUTTER B DETAIL

GUTTER A DETAIL

1 8

1 2

Unit Clearances, Curb Dimensions, and Dimensional Data

OADE Units

Figure 22. Unit curb data for OADE 5–12 tons

Figure 23. Unit curb data for OADE 5–12 tons with auxiliary cabinet

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

OAU-PRC003A-EN 41

Page 42

Unit Clearances, Curb Dimensions, and Dimensional Data

46.91

53.00

65.11

87.18

29.63

59.30

87.18

53.00

65.11

46.91

59.30

44.16

35.32

131.33

OADE Units

Dimensional Data

Figure 24. Unit dimensional data for OADE 5–12 tons (in.)

Figure 25. Unit dimensional data for OADE 5–12 tons with auxiliary cabinet (in.)

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

42 OAU-PRC003A-EN

Page 43

Unit Clearances, Curb Dimensions, and Dimensional Data

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 26. OADE indirect gas-fired furnace heater and power

OADE Units

OAU-PRC003A-EN 43

Page 44

Unit Clearances, Curb Dimensions, and Dimensional Data

CLEARANCE 36"

CLEARANCE 48"

CLEARANCE 36"

CLEARANCE FROM TOP

OF UNIT 72"

CLEARANCE 48"

4'-0"

3'-0"

4'-0"

OAKE Units

Unit Clearances

Figure 27. Typical installation clearances for OAKE unit

44 OAU-PRC003A-EN

Page 45

Unit Clearances, Curb Dimensions, and Dimensional Data

CLEARANCE 48"

OF UNIT 72"

CLEARANCE FROM TOP

CLEARANCE 36"

CLEARANCE 48"

3'-0"

4'-0"

Figure 28. Typical installation clearances for OAKE unit with auxiliary cabinet

OAKE Units

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

OAU-PRC003A-EN 45

Page 46

Unit Clearances, Curb Dimensions, and Dimensional Data

7'-0"

6'-0"

7'-0"

OAKE Units

Figure 29. Typical installation clearances for OAKE unit

Figure 30. Typical installation clearances for OAKE unit with auxiliary cabinet

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

46 OAU-PRC003A-EN

Page 47

Curb Dimensions

PPL

GUTTER

16 "

102"

30"

29"

56"

" 47

"4 1

TYP.

"2 98

52 "

"4 31

"2 22

1 2

GUTTER DETAIL

1 2

GUTTER A DETAIL

1 2

GUTTER A

GUTTER B

1 2

23 "

102"

164

"8 98

56"

"4 1

30"

29"

58"

1 4

1 2

" 22

"4 31

TYP.

1 2

3 4

GUTTER B DETAIL

1 2

Unit Clearances, Curb Dimensions, and Dimensional Data

OAKE Units

Figure 31. Unit curb data for OAKE 12–30 tons (in.)

Figure 32. Unit curb data for OAKE 12–30 to ns with auxiliary cabinet (in.)

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

OAU-PRC003A-EN 47

Page 48

Unit Clearances, Curb Dimensions, and Dimensional Data

106.45

106.00

135.52

86.05

80.57

OF AIR INLET

43.02

BASE TO BOTTOM

60.00

106.00

86.05

80.57

60.00

62.11

200.99

43.02

BASE TO BOTTOM

OF AIR INLET

106.10

62.51

OAKE Units

Dimensional Data

Figure 33. Unit dimensional data for OAKE 12–30 tons

Figure 34. Unit dimensional data for OAKE 12–30 tons with auxiliary cabinet

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

48 OAU-PRC003A-EN

Page 49

Figure 35. OAKE 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

Unit Clearances, Curb Dimensions, and Dimensional Data

OAKE Units

OAU-PRC003A-EN 49

Page 50

Unit Clearances, Curb Dimensions, and Dimensional Data

CLEARANCE 55"

CLEARANCE 72"

CLEARANCE 36"

CLEARANCE 50"

CLEARANCE 48"

4'-0"

4'-7"

3'-0"

4'-2"

OANE Units

Unit Clearances

Figure 36. Typical installation clearances for OANE unit

50 OAU-PRC003A-EN

Page 51

Unit Clearances, Curb Dimensions, and Dimensional Data

CLEARANCE 36"

CLEARANCE 48"

CLEARANCE 50"

CLEARANCE 55"

CLEARANCE 72"

4'-7"

3'-0"

4'-2"

4'-0"

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

OANE Units

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

OAU-PRC003A-EN 51

Page 52

Unit Clearances, Curb Dimensions, and Dimensional Data

8'-0"

OANE Units

Figure 38. Typical installation clearances for OANE unit

Figure 39. Typical installation clearances for OANE unit with auxiliary cabinet

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

52 OAU-PRC003A-EN

Page 53

Curb Dimensions

GUTTER DETAIL

"2 2

1 2

GUTTER

66"

63"

140"

33"

517"

221"

1361"

TYP.

293"

51 "

1 2

GUTTER A

GUTTER B

51 "

63"

"2 59

140"

33"

"8 51

"4 22

"2 136

"8 4

"8 54

202"

TYP.

29 "

"2 22

1 2

66"

GUTTER B DETAIL

" 2

1 2

GUTTER A DETAIL

" 4

1 2

Unit Clearances, Curb Dimensions, and Dimensional Data

OANE Units

Figure 40. Unit curb data for OANE 30–54 tons

Figure 41. Unit curb data for OANE 30–54 tons with auxiliary cabinet

OAU-PRC003A-EN 53

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

Page 54

Unit Clearances, Curb Dimensions, and Dimensional Data

92.07

144.45

186.14

144.00

93.04

67.00

48.52

BASE TO BOTTOM

OF AIR INLET

248.16

144.00

93.04

67.00

92.07

62.07

48.52

BASE TO BOTTOM

206.55

OANE Units

Dimensional Data

Figure 42. Unit dimensional data for OANE 30–54 tons

Figure 43. Unit dimensional data for OANE 30–54 tons with auxiliary cabinet

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

54 OAU-PRC003A-EN

Page 55

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 44. OANE furnace heater and power

Unit Clearances, Curb Dimensions, and Dimensional Data

OANE Units

OAU-PRC003A-EN 55

Page 56

Unit Weight

Table 12. Typical unit weights—units without auxiliary cabinet

Model Number

OABE036* 1172 1356 1420 1604 OABE048* 1189 1373 1437 1621 OABE060* 1189 1373 1437 1621 OABE072* 1237 1421 1485 1669 OABE084* 1237 1421 1485 1669 OABE096* 1269 1453 1517 1701 OABE108* 1313 1497 1561 1745 OADE060* 1614 2078 1701 2165 OADE072* 1639 2158 1726 2245 OADE084* 1639 2158 1761 2280 OADE096* 1669 2364 1827 2522 OADE120* 1669 2364 1857 2552 OADE144* 1718 2413 1929 2624 OADE180* 1416 2249 1707 2540 OAKE144* 2685 3350 2895 3560 OAKE180* 2521 3186 2812 3477 OAKE210* 2803 3620 3146 3963 OAKE240* 2831 3648 3223 4040 OAKE264* 2831 3648 3223 4040 OAKE300* 2835 3695 3317 4177 OAKE360* 2909 3769 3391 4251 OANE360* 4631 5614 5276 6259 OANE420* 4946 5929 5592 6575 OANE480* 5039 6051 5714 6726 OANE540* 5106 6063 5726 6683 OANE600* 5270 6352 6043 7125 OANE648* 5282 6364 6055 7137

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

Operating Weight (lb) Shipping Weight (lb)

Min Max Min Max

product.

56 OAU-PRC003A-EN

Page 57

Table 13. Typical unit weights—units with auxiliary cabinet

Operating Weight (lb) Shipping Weight (lb)

Model Number

OABE036* 1657 1841 1905 2089 OABE048* 1674 1858 1922 2106 OABE060* 1674 1858 1922 2106 OABE072* 1722 1906 1970 2154 OABE084* 1722 1906 1970 2154 OABE096* 1754 1938 2002 2186 OABE108* 1798 1982 2046 2230 OADE060* 2601 3065 2688 3152 OADE072* 2571 3090 2658 3177 OADE084* 2603 3122 2725 3244 OADE096* 2695 3390 2853 3548 OADE120* 2695 3390 2883 3578 OADE144* 2744 3439 2955 3650 OADE180* 2442 3275 2733 3566 OAKE144* 4068 4733 4278 4943 OAKE180* 3947 4612 4238 4903 OAKE210* 4487 5304 4830 5647 OAKE240* 4515 5332 4907 5724 OAKE264* 4515 5332 4907 5724 OAKE300* 4499 5359 4981 5841 OAKE360* 4507 5367 4989 5849 OANE360* 6607 7590 7252 8235 OANE420* 6922 7905 7568 8551 OANE480* 7015 8027 7690 8702 OANE540* 7082 8039 7702 8659 OANE600* 7227 8309 8000 9082 OANE648* 7239 8321 8012 9094

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

product.

Min Max Min Max

Unit Weight

Rigging

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

• OAU-SVX004*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Water Sou r ce Heat Pump - Model: OABE, OADE, OAKE, OANE)

OAU-PRC003A-EN 57

Page 58

Mechanical Specifications

Horizon Outdoor Air Mechanical Specifications

General

The units shall be down disch arg e ai rflow (OAD, OAK, or OAN) or convertible (OAB) between down/horizontal for both supply and return openings. Cooling performance shall be rated in accordance with ETL testing procedures. All units shall be factory assembled, internally wired, ful ly charged with R-410A, and 100 percent run tested to check cooling operation, fan and blower rotation, and control sequence before leavin g the factory. Wiring internal to the unit shall be colored and numbered for simplified identification. Un its 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 AS TM 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.

58 OAU-PRC003A-EN

Page 59

Mechanical Specifications

Evaporator Coils

Refer to Figure 45. Internally finned copper tubes mechanically bonded to a configured aluminum 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. Evaporator coil will have four interlaced rows for superior sensible and latent cooling.

Figure 45. Evaporator and reheat coil

Condenser—Water Cooled (Copper/Steel or 90/10 CuNi Condenser Tubes)

The condenser coils utilize a coaxial “tube in tube” design. Water flows through the inner tube while refrigerant flows in the annulus between the inner and outer tubes. The coils have a convoluted multi-lead inner tube which has increased heat transfer surface area per unit length yet still permits full flow of both water and refrigerant around its entire periphery for improved performance. Turbulence imparted by the convolutions to both the water and refrigerant flows further enhances the thermal performance, while inhibiting the accumulation of deposits on the surfaces.

Digital Scroll Compressors

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.

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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 46. 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 47.

Figure 47. Indoor fan and motor

Supply and Exhaust Fan and Motors (OAB)

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

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. Microprocessor 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.

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Mechanical Specifications

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 shall 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 48.

Figure 48. ER Heater

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 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. Af ter three unsuccessful ignition attempts, the entire heating system shall be locked out until manually reset at the thermostat/zone sensor . Units shall be comply with the California requirement for low

emissions. Unit shall be suitable for use with Natural Gas.

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Mechanical Specifications

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-SVX004*-EN (Installation, Operation, and Maintenance: Horizon™ Outdoor Air Unit - Water Sou r ce Heat Pump - Model: OABE, OADE, OAKE, OANE)

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 49.

Figure 49. 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.

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Mechanical Specifications

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. 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.

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 50. Convenience outlet

Roof Mounting Curb

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

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Appendix

OAU Filter Guide

Table 14. OABE 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

Table 15. OADE 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

216 20 216 25 216 20 216 25

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Appendix

Table 16. OAKE 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

225 20 125 16

Outside Air

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

Thickness MERV Qty Height Width

2 in. 8 8 20 18

Inlet

Thickness Material Qty Height Width

2 in. Aluminum Mesh 6 20 20

Table 17. OANE 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

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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 without notice.

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

Trane OABE, OADE, OAKE, OANE Catalogue

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

The Horizon Outdoor Air Unit Water Source Heat Pump...

Model Number Descriptions

Horizon Outdoor Air Unit Water Source Heat Pump

Model: OABE

Models: OADE, OAKE, 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 WSHP Selection Procedure

General Data

OABE Units

Unit Clearances

Curb Dimensions

Dimensional Data

OADE Units

Unit Clearances

Curb Dimensions

Dimensional Data

OAKE Units

Unit Clearances

Curb Dimensions

Dimensional Data

OANE Units

Unit Clearances

Curb Dimensions

Dimensional Data

Unit Weight

Unit Weight

Rigging

Mechanical Specifications

Horizon Outdoor Air Mechanical Specifications

Refrigeration and Dehumidification Systems

Electrical and Controls

Options

Appendix

OAU Filter Guide