Trane TWA075A User manual

Split System Heat Pumps

TWA075A-TWA200B

Air Handlers

TWE050A-TWE200B

50 Hz

SSP-PRC002-EN

January 2004

©American Standard Inc. 2001 SSP-PRC002-EN

Introduction

SplitSystemHeatPumpUnits . . .

DesignedWith Your Needs In Mind.

TheTrane reputation for quality and

reliability in air conditioning continues

with the Odyssey™ family of light

commercial split systems. Trane paid

attention to your needs to make sure you

get a system that will meet your job

requirements every time...and at a

competitive price.

CoupleTrane’s reputation for quality and

reliability in split system air conditioners

with efficiency, flexibility and installation

ease...and you have systems that will

give you “SimplyThe Best Value.’’

Manufacturing Control

Trane’s exclusive control over the design

and manufacturing of all major

components is unique in the industry.

This approach assures us total control

over both the quality and reliability of

these components. And allows us to

custom match components to deliver the

best in split system performance.

Designing the Details

Careful attention was given to designing

the details — from control wiring to the

access panels. Odyssey units feature

time-saving colored and numbered

wiring and removable panels which

allow complete access to all major

components and controls. All outdoor

units feature external high and low

pressure switches for easy diagnosing

and servicing of the unit. Service valves

with gauge ports are provided on all

units.

Standardized Cabinets

In addition, all cabinets have been

standardized. When you are servicing an

outdoor unit or an air handler, all

components are in the same location

from unit to unit.

Filters

TheTWE050A, 075A, 100A and 100B air

handlers are supplied with 1" (25.4 mm)

throwaway filters as standard.The filter

racks were designed to easily convert for

installation of 2" (50.8 mm) filters.The

TWE155B and 200B air handlers have 2"

(50.8 mm) filters as standard.

UL Listed and ARI Certified

Trane meets or exceeds all nationally

recognized agency safety and design

standards. Each condensing unit is UL

designed, approved and labeled in

accordance to UL Standards: UL 1995 for

central cooling air conditioners,

refrigeration and air conditioning

condensing and compressor units. Each

air handler is designed, approved and

labeled in accordance to UL 465 and UL

1995 standard for heat pumps. Each unit

is certified in accordance with ARI

Standard 210/240 or 340/360.

Contents

SSP-PRC002-EN

Introduction

Features and Benefits

Application Considerations

Selection Procedure

Model Number Description

General Data

Performance Data

Cool and Heat Performance

Fan Performance

Electric Power

Connection and Wiring

Dimension andWeights

Mechanical Specifications

4SSP-PRC002-EN

Features and

Benefits

Condensing Units Options

TheTWA075A and 100A single

compressor models feature single

refrigeration circuitry, lowering job

installation costs by requiring only one

set of refrigerant lines.These units are

ideal for the low cost, new construction

jobs as well as renovation and

replacement buildings.

In addition, Odyssey includesTWA155B

and 200B dual compressor units to give

true stand-by protection; if one

compressor fails, the second will

automatically start-up. Also, the first

compressor can be serviced without

shutting down the unit since the

refrigerant circuits are independent.

Dual compressors are not just for

protection, they also save energy costs.

Most buildings are designed for the peak

load requirements yet the building

usually operates at less than peak load.

During light load conditions, only one

compressor functions to maintain the

space comfort thus reducing the need

for energy.

Trane split systems have been specified

in thousands of applications and you’ll

find Odyssey will win you even more

jobs with its small manageable cabinet.

This light, compact design will save time

and money for rigging and installation.

And the compactness will permitTrane’s

unit to replace almost any unit —

effortlessly.

Low Ambient Cooling Operation

Each heat pump unit can operate to 50°F

(10°C) as standard in the cooling mode.

An accessory Head Pressure Control

gives you the capability to operate to 0°F

(-18°C). All heat pumps offer these

accessories:

•Head Pressure Control

•Coil Guard Kits

•Isolators both Rubber-in-Shear and

SpringType

•Anti-Short-Cycle Kit

•Time Delay Relay

Air Handlers Offer More

Flexibility

Flexibility is a key to meeting changing

market requirements. Odyssey split

sytems offer not only heat pumps but

also convertible air handlers.The air

handlers can be installed either vertically

in a mechanical room or horizontally

above a ceiling. And it doesn’t require

any removal of panels to make either

airflow application work.These air

handlers have a double sloped

condensate drain pan that allows for

either airflow configuration. And the

drain pan can easily be removed for

cleaning. All the air handlers feature

factory installed belt drive and ball

bearing evaporator fans with adjustable

sheaves for maximum airflow

performance. In fact, the standard motor

on theTWA100A air handler will deliver

3325 cfm (5649 m3/hr) at 1.4" (349 Pa)

ESP. Plus oversized motors are available

for higher static applications.

5SSP-PRC002-EN

Features and

Benefits

Odyssey — A Complete Split

System

Odyssey delivers the flexibility to select

a complete system that meets your

particular job requirements. Air

handlers are designed, tested, and

rated with outdoor units to let you

select the proper match between

capacity and load. Heat pumps can also

be matched withTrane built-up air

handlers. Also, these matched systems

can be quickly engineered for specific

applications usingTrane’s computerized

selection and load programs.

Odyssey air handler versatility is further

increased by a complete line of

accessories designed to match and

install smoothly:

•Discharge Plenum and Grille

•Return Grille

•Subbase

•Electric Heaters

•High Static Evaporator Motor

•Isolators both Rubber-in-Shear

and SpringType

•A Full Line ofThermostats

•OutdoorThermostat

Odyssey Lowers Installation

Costs

Your installation costs are reduced with

Odyssey. Both outdoor units and air

handlers are factory packaged and

assembled so jobsite installation is quick

and easy.You get a complete unit with

all the components, controls and the

internal wiring factory ready for a

smooth jobsite start-up.

Unlike some competitive models the

following components are factory-

installed inTrane air handlers:

•Single Point Power Entry

•Blower wheel and housing

•Evaporator motor with sheaves

and pulleys

•Low VoltageTerminal Board

•Transformer

•Contactor

•Fan relay

•DX Coil with complete refrigeration

circuitry

•Expansion Valve and Check Valves

There’s no need to install components

and put together the air handler on the

job.This provides you with less labor

cost and fewer chances for installation

errors which cause callbacks. All this

means saving you money both in

replacement and new construction

applications.

6SSP-PRC002-EN

Application

Considerations

Typical Horizontal Air Handler Application Typical Vertical Air Handler Application

Typical Split System Application

Low Ambient Cooling

As manufactured, these units can

operate to 50°F (10°C) in the cooling

mode of operation. An accessory head

pressure control will allow operation to

0° F (-17.8°C) outdoor ambient. When

using these units with control systems

such as bypass changeover Variable Air

Volume, make sure you consider the

requirement for a head pressure control

to allow low ambient cooling.

Application of this product should be

within the catalogued airflow and

performance considerations.

Clearance Requirements

The recommended clearances identified

with unit dimensions should be

maintained to assure adequate

serviceability, maximum capacity and

peak operating efficiency. Actual

clearances which appear inadequate

should be reviewed with the localTrane

Representative.

180° Blower Rotation

TheTWE050, 075 and 100 air handler

blower section can be rotated 180° to

change the discharge pattern.This

modification must be done in the field

and requires an addition of kit. See unit

installer's guide.

7SSP-PRC002-EN

Selection

Procedure

Cooling Capacity

Step 1 — Calculate the building’s total

and sensible cooling loads at design

conditions.

Step 2 — Size the equipment usingTable

PD-1. Match the cooling loads at design

conditions.

Example:The following are the building

cooling requirements

Electrical Characteristics: 380-415/50/3

Summer Design Conditions: Entering

Evaporator Coil: 80 DB/67 WB

(27 DB/19 WB°C)

Outdoor Ambient: 95°F (35° C)

Total Cooling Load: 75 MBh (22kW)

Sensible Cooling Load: 53 MBh

(15.5 kW)

Airflow: 2500 cfm (4247 m3/h)

External Static Pressure: 0.77 in. wg

(193 Pa)

Table PD-1 shows that aTWA075A

matched with aTWE075A has a gross

cooling capacity of 85.1 MBh (24.9 kW)

and 60.8 MBh (17.8 kW) sensible capacity

at 95 DB (35°C) ambient and 2500 cfm

(4247 m3/h) and 80 DB/67 WB (27 DB/19

WB) air entering the evaporator.

To find the net cooling capacities, fan

motor heat must be subtracted.

Determine the total unit static pressure:

External Static 0.77 in (193 Pa)

Standard Filter 0.10 in (25 Pa)

Supplementary Electric Heat

0.23 in (57 Pa)

Total Static Pressure 1.10 in (275 Pa)

Note:The Evaporator Fan Performance

Table has included the effect of a 1 in.

(250 Pa) filter already.Therefore, the

actualTotal Static Pressure is 1.10 - 0.10 =

1.00 in. (275 - 25 = 250 Pa).

With 2500 cfm (4247 m3/h) and 1.00

inches (250 Pa),Table PD-15 shows a 1.07

bhp (0.8 kW).

Note:The formula below the table can be

used to calculate Fan Motor Heat,

Constant x Motor Power =

Fan Motor Heat

3.5 x bhp = MBh

3.5 x 1.07 = 3.75 MBh

1.375 x (kW) = kW

1.375 x 0.8 = 1.1 kW

NetTotal Cooling Capacity

= 85.1 MBh – 3.75 = 81.35 MBh

= 24.9 kW - 1.1 = 23.8 kW

Net Sensible Cooling Capacity

= 60.8 MBh – 3.75 = 57.05 MBh

= 17.8 MBh - 1.1 = 16.7 kW

Heating Capacity

Step 1 — Calculate the building heating

load using theTrane calculation form or

any other standard accepted method.

Step 2 — Size the equipment usingTable

PD-9 to match the heating loads at

design conditions.The following are

building heating requirements:

Total Heating Load: 110 MBh (32.2 kW)

Outdoor Ambient (Winter): 17°F

(-8.3°C) DB

Indoor ReturnTemperature: 70°F

(21.1°C) DB

Airflow: 2500 cfm (4247 m3/h)

Table PD-9 indicates the mechanical

heating portion of the heat pump will

provide 49.1 MBh (14.4 kW) for the

winter design conditions.

Step 3 — Because 49.1 MBh (14.4 kW) is

less than the building’s required heating

capacity, a supplementary heater must

be selected. 110 - 49.1 = 60.9 MBh (32.2 -

14.4 = 17.8 kW) minimum heater

capacity.

FromTable PD-25, the 24.22 kW heater

has a capacity of 82,670 Btu. FromTable

ED-5, the 24.22 kW heater at 400V

indicates the heater model number is

BAYHTRL435A.This heater will be

adequate to cover the residual heat

capacity needed for the application.

Air Delivery Selection

External static pressure drop through the

air distribution system has been

calculated to be 0.77 inches (192.5 Pa) of

water gauge. FromTable PD-24 static

pressure drop through the electric heater

is 0.12 inches (30 Pa) of water (0.77 + 0.12

= .89 in.) (192.5 + 30 = 222.5 Pa). Enter

Table PD-15 forTWE090A4 at 2500 cfm

(4247 m3/h) and .90 in. (225 Pa) static

pressure.The standard motor at 790 rpm

will give the desired airflow.

8SSP-PRC002-EN

Model

Number

Description

Digit 8 - Electrical Characteristics

D = 380-415/3/50

Digits 9, 10 - Factory - Installed Options

00 = No Options

0S = Black Epoxy Coated Coil

Digit 11- Minor Design Sequence

D = Fourth

Digit 12- Service Digit

A= First

Split System Heat Pump Model Nomenclature

Digit 7- Major Development Sequence

A = Single Compressor

B = Dual Compressor

TWA075 AD00 DA

12 3 456 7 8 910 11 12

Air Handler Model Nomenclature

Digit 8 - Electrical Characteristics

D = 380-415/3/50

Digits 1, 2, 3 - ProductType

TWE = Cooling Convertible

Digits 4, 5, 6 - Nominal Gross Cooling

Capacity (MBh)

050 = 50

075 = 75

100 = 100

155 = 155

200 = 200

Digit 7- Refrigerant Circuit

A = Single

B = Dual

TWE 050 A D 0 0 C A

12 3 456 7 8 910 11 12

Digit 9, 10 - Factory - Installed Options

00 = No Options

Digit 11- Minor Design Sequence

C = Third

Digit 12- Service Digit

A= First

Digits 4, 5, 6 - Nominal Gross Cooling Capacity

(MBh)

075 = 75

100 = 100

155 = 155

200 = 200

Digits 1, 2, 3 - ProductType

TWA = Split System Heat Pump

9SSP-PRC002-EN

General

Data (Heat Pumps)

Table GD-1 — General Data — Heat Pumps

TWA075A TWA100A

Cooling Performance1

Gross Cooling Capacity, Btu (kW)

Matched Air Handler, Btu (kW) 85,000 (24.89) 112,000 (32.79)

Heat Pump Only2, Btu (kW) 85,000 (24.89) 112,000 (32.79)

ARI Net Cooling Capacity383,000 (24.30) 108,000 (31.62)

System Power kW 7.91 10.27

Heat Pump Only Power kW 7.12 9.32

Heating Performance

ARI Heating with Matched Air Handler

HighTemperature Capacity, Btu (kW) 81,000 (23.72) 110,000 (32.21)

LowTemperature Capacity, Btu (kW) 49,000 (14.35) 71,000 (20.79)

Compressor

Number 1 1

Type 3D®Scroll 3D®Scroll

No. Motors 1 1

Motor HP (kW) 6.25 (4.7) 8.33 (6.21)

Motor RPM 2875 2875

ARI Sound Rating (Bels)48.8 8.8

System Data5

No. Refrigerant Circuits 1 1

Suction Line, in. (mm) OD 1.375 (34.9) 1.375 (34.9)

Liquid Line, in. (mm) OD 0.500 (12.7) 0.500 (12.7)

Outdoor Coil —Type Plate Fin Plate Fin

Tube Size, in. (mm) OD 0.375 (9.5) 0.375 (9.5)

Face Area, sq. ft (m2) 19.2 (1.78) 29.5 (2.74)

Rows 2 2

Fins Per Inch 18 18

Outdoor FanType Propeller Propeller

No. Used 1 1

Diameter, in. (mm) 26.00 (660.4) 28.00 (711)

DriveType Direct Direct

No. Speeds 1 1

CFM6, (m3/h) 4900 (8325.1) 6700 (11383.30)

No. Motors 1 1

Motor HP (kW) 0.33 (.25) 0.75 (.56)

Motor RPM 925 925

R-22 Refrigerant Charge, lb7(kg) 18.0 (8.16) 31.5 (14.29)

Notes:

1. Cooling Performance is rated at 95°F (35°C) ambient, 80°F (26.7°C) entering dry bulb, 67°F (19.4°C) entering wet

bulb and nominal cfm listed. ARI rating cfm is 350 cfm/ton for this product. Gross capacity does not include the

effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Units are suitable for

operation to ±20% of nominal cfm. Rated accordance with ARI Standard 340/360-00.

2. Condensing Unit Only Gross Cooling Capacity rated at 45°F (7.2°C) saturated suction temperature and at 95°F

(35°C) ambient.

3. ARI Net Cooling Capacity is calculated with matched blower coil and 25 ft (7.2 m) of 1.375, 0.500 OD interconnect-

ing tubing. EER and/or SEER are rated at ARI conditions and in accordance with DOE test procedures. Integrated

Part Load Value is based on ARI Standard 340/360-00. Units are rated at 80°F (26.7°C) ambient, 80°F (26.7°C) entering dry

bulb, and 67°F (19.4°C) entering wet bulb at ARI rated cfm.

4. ARI Sound Rating is rated in accordance with ARI Standard 270 or 370.

5. System Data based on maximum linear length 80 ft (26.7 m). Maximum lift: suction 60 ft (18.3 m) liquid 60 ft (18.3

m). For greater lengths, refer to refrigerant piping applications manual.

6. Outdoor Fan cfm is rated with standard air-dry coil outdoor.

7. Refrigerant (operating) charge is for condensing unit (all circuits) with matching blower coils and 25 ft (7.6 m) of

interconnecting refrigerant lines.

10 SSP-PRC002-EN

General

Data (Heat Pumps)

Table GD-2 General Data — Heat Pumps

TWA155B TWA200B

Cooling Performance1

Gross Cooling Capacity, Btu (kW)

Matched Air Handler, Btu (kW) 167,000 (48.9) 218,000 (63.83)

Condensing Unit Only2, Btu (kW) 167,000 (48.9) 218,000 (63.83)

ARI Net Cooling Capacity3162,000 (47.43) 211,000 (61.78)

System Power kW 15.67 21.51

Condensing Unit Power kW 13.91 19.1

Heating Performance

ARI Heating with Matched Air Handler

HighTemperature Capacity, Btu (kW) 166,000 (48.6) 214,000 (62.66)

LowTemperature Capacity, Btu (kW) 101,000 (29.57) 139,000 (40.70)

Compressor

Number 2 2

Type 3D®Scroll 3D®Scroll

No. Motors 2 2

Motor HP 6.25 (4.7) 8.33 (6.21)

Motor RPM, (kW) 2875 2875

ARI Sound Rating (Bels)48.8 8.8

System Data5

No. Refrigerant Circuits 2 2

Suction Line, in. (mm) OD 1.375 (34.9) 1.375 (34.9)

Liquid Line, in. (mm) OD 0.500 (12.7) 0.500 (12.7)

Outdoor Coil —Type Plate Fin Plate Fin

Tube Size, in. (mm) OD 0.375 (9.5) 0.375 (9.5)

Face Area, sq. ft (m2) 38.4 (3.57) 48 (4.46)

Rows 2 2

Fins Per Inch 18 18

Outdoor FanType Propeller Propeller

No. Used 2 2

Diameter, in. (mm) 26.00 (660.4) 28.00 (711)

DriveType Direct Direct

No. Speeds 1 1

CFM6, (m3/h) 9800 (16650.2) 13400 (22766.60)

No. Motors 2 2

Motor HP (kW) 0.33 (.25) 0.75 (.56)

Motor RPM 925 925

R-22 Refrigerant Charge, lb7(kg) 36.0 (16.33) 48.5 (22.0)

Notes:

1. Cooling Performance is rated at 95°F (35°C) ambient, 80°F (26.7°C) entering dry bulb, 67°F (19.4°C) entering wet

bulb and nominal cfm listed. ARI rating cfm is 350 cfm/ton for this product. Gross capacity does not include the

effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Units are suitable for

operation to ±20% of nominal cfm. Rated accordance with ARI Standard 340/360-00.

2. Condensing Unit Only Gross Cooling Capacity rated at 45°F (7.6°C) saturated suction temperature and at 95°F

(35°C) ambient.

3. ARI Net Cooling Capacity is calculated with matched blower coil and 25 ft (7.6 m) of 1.375, 0.500 OD interconnect-

ing tubing. EER and/or SEER are rated at ARI conditions and in accordance with DOE test procedures. Integrated

Part Load Value is based on ARI Standard 340/360-00. Units are rated at 80°F (26.7°C) ambient, 80°F (26.7°C) entering dry

bulb, and 67°F (19.4°C) entering wet bulb at ARI rated cfm.

4. ARI Sound Rating is rated in accordance with ARI Standard 270 or 370.

5. System Data based on maximum linear length 80 ft (26.7 m)Maximum lift: suction 60 ft (18.3 m) liquid 60 ft (18.3

m) For greater lengths, refer to refrigerant piping applications manual.

6. Outdoor Fan cfm is rated with standard air-dry coil outdoor.

7. Refrigerant (operating) charge is for condensing unit (all circuits) with matching blower coils and 25 ft (7.6 m) of

interconnecting refrigerant lines.

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