Trane 7 - 20 Tons User manual

Split System Heat Pumps

7½ - 20 Tons - 60 Hz

Air Handlers

5-20 Tons - 60 Hz

Split System Heat Pumps

February 2008 SSP-PRC001-EN

2SSP-PRC001-EN

Introduction

Split System Heat Pump

Units Designed With

Your Needs In Mind.

The Trane reputation for quality and

reliability in air conditioning is

apparent with Odyssey™ light

commercial split systems. These

Trane systems are designed to meet

your job requirements every

time...and at a competitive price.

Odyssey has Trane quality and

reliability built-in. Couple that with

outstanding efficiency, flexibility and

installation ease, and you have an

unbeatable combination for years of

worry-free service and operation.

Manufacturing Control

Trane’s exclusive control over the

design and manufacturing of all

major components is unique in the

industry. This approach assures 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

The 5, 7½ and 10 ton air handlers are

supplied with 1" throwaway filters as

standard. The filter racks were

designed to easily convert for

installation of 2" filters. The 15 and

20 ton air handlers have 2" filters as

standard.

Figure 1.

SSP-PRC001-EN 3

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

Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Application Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Model Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Jobsite Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Typical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

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

Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Contents

4SSP-PRC001-EN

Condensing Units Options

The 7½ and 10-ton single

compressor models feature single

refrigeration circuitry, lowering job

installation costs by requiring only

one set of refrigerant lines. These

units are ideal for low cost, new

construction, building renovation

and unit replacement jobs.

In addition, Odyssey includes 15 and

20-ton 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 also provide high

energy savings. Most buildings are

designed for peak load requirements

even though the building typically

operates at less than peak load.

During light load conditions only one

compressor functions to maintain

the space comfort, reducing energy

use. For instance, the EER of the 15

ton unit at ARI conditions is 10.1 and

at part load conditions it is 11.6.

Trane split systems have been

specified in thousands of

applications. You’ll find Odyssey will

win you even more jobs with its

compact, manageable cabinet which

will save time and money for rigging

and installation and permit Trane to

replace almost any unit —

effortlessly.

Each heat pump unit can operate to

50°F as standard in the cooling

mode. An accessory Head Pressure

Control gives you the capability to

operate to 0°F. All heat pumps offer

these accessories:

• Head Pressure Control

• Coil Guard Kits

• Isolators - both Rubber-in-Shear

and Spring Type

• Anti-Short-Cycle Kit

• Time Delay Relay

Air Handlers Offer More

Flexibility

Flexibility is a key to meeting

changing market requirements.

Odyssey split systems 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.

Figure 2.

These air handlers have a double

sloped condensate drain pan that

allows for either airflow

configuration. 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 the 10-ton air handler will

deliver 4000 cfm at 1.4" ESP. Plus

oversized motors are available for

higher static applications.

Features and Benefits

SSP-PRC001-EN 5

Features and Benefits

Odyssey’s 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 Spring Type

• A full line of Thermostats

• Outdoor Thermostat

Figure 3.

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. Also, these

matched systems can be quickly

engineered for specific applications

using Trane’s computerized selection

and load programs.

Odyssey Lowers Installation Costs

Your installation costs are reduced

with Odyssey Split. Both outdoor

units and air handlers are factory

packaged and assembled so jobsite

installation is quick and easy. You get

a complete system, with all the

components, controls and the

internal wiring, factory-installed for a

smooth jobsite start-up.

Unlike some competitive models the

following components are factory-

installed in Trane air handlers:

• Single Point Power Entry

• Blower Wheel and Housing

• Evaporator Motor with Sheaves

and Pulleys

• Low Voltage Terminal 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.

Figure 4.

6SSP-PRC001-EN

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 a local Trane

Representative.

180° Blower Rotation

The 5, 7½ and 10 ton air handler

blower section can be rotated 180° to

change the discharge pattern. This

modification must be done in the

field and requires an additional kit.

See unit installer's guide.

Low Ambient Cooling

As manufactured, these units can

operate to 50°F in the cooling mode

of operation. An accessory head

pressure control will allow operation

to 0°F 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.

Figure 5. Typical Horizontal Air Handler Application

Figure 6. Typical Split System Application

Application Considerations

SSP-PRC001-EN 7

Application Considerations

Figure 7. Typical Vertical Air Handler Application

8SSP-PRC001-EN

Cooling Capacity

Step 1.

Calculate the building’s total and

sensible cooling loads at design

conditions.

Step 2.

Size the equipment using Ta b l e 3 .

Match the cooling loads at design

conditions.

Example: The following are the

building cooling requirements:

a. Electrical Characteristics:

460/60/3

b. Summer Design Conditions:

Entering Evaporator Coil:

80°F DB/67°F WB Outdoor

Ambient: 95°F

Total Cooling Load: 90 MBh

c. Sensible Cooling Load: 64

MBh

d. Airflow: 3000 cfm

External Static Pressure:

0.77 inches of water gauge

Ta b l e 3 shows that TWA090A4 with

TWE090A has a gross cooling

capacity of 91.1 MBh and 65.9 MBh

sensible capacity at 95°F DB ambient

and 3000 cfm with 80°F DB/67°F 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 Duct System 0.77 in.

Standard Filter 1 in. 0.10 in.

Supplementary Electric Heat 0.23 in.

Total Static Pressure 1.10 in.

Note: The Evaporator Fan

Performance Table has

included the effect of a 1 in.

filter already. Therefore, the

actual Total Static Pressure is

1.10 - 0.10 = 1.0 0 in. With

3000 cfm and 1.00 in.,

Ta b l e 1 7 shows a 1.17 bhp.

Note: The formula below the table

can be used to calculate Fan

Motor Heat:

3.5 X bhp = MBh

3.5 X 1.17 = 4.09 MBh

Net Total Cooling Capacity =

91.1 MBh - 4.09 = 87.01 MBh

Net Sensible Cooling Capacity =

65.9 MBh - 4.09 = 61.81 MBh

Heating Capacity

Step 1.

Calculate the building heating load

using the Trane calculation form or

any other standard accepted

method.

Step 2.

Size the equipment using Ta b l e 11 to

match the heating loads at design

conditions. The following are

building heating requirements:

a. Total Heating Load: 95.0 MBh

b. Outdoor Ambient (Winter):

17°F DB

c. Indoor Return Temperature:

70°F DB

d. Airflow: 3000 cfm

Ta b l e 11 indicates the mechanical

heating portion of the heat pump will

provide 54.8 MBh for the winter

design conditions.

Step 3.

Because 54.8 MBh is less than the

building’s required heating capacity,

a supplementary heater must be

selected. 95.0 - 54.8 = 40.2 MBh

minimum heater capacity.

From Table 32, the 14.96 kW heater

has a capacity of 51,058 Btu/h.

From Table 37, the 14.96 kW heater

at 460V indicates the heater model

number is BAYHTRL415A.

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 in. of

water gauge.

From Table 31 static pressure drop

through the electric heater is 0.12 in.

of water (0.77 + 0.12 = .89 in.)

Enter Ta b l e 17 for TWE090A4 at 3000

cfm and .90 static pressure. The

standard motor at 790 RPM will give

the desired airflow.

Selection Procedure

SSP-PRC001-EN 9

Digits 11 - Minor Design Sequence

A = Current Design Sequence

Digits 12 - Service Digit

A = Current Service Digit

Digits 11 - Minor Design Sequence

A = Current Design Sequence

Digits 12 - Service Digit

A = Current Service Digit

Digits 1,2,3 - Product Type

TWA = Split System Heat Pump

Digits 4,5,6 - Nominal Gross Cooling

Capacity (MBh)

090 = 7 1/2 Tons

120 = 10 Tons

180 = 15 Tons

240 = 20 Tons

Digits 7 - Major Development

Sequence

A = Single Compressor

B = Dual Compressor

Digits 1,2,3 - Product Type

TWE = Split System Heat Pump/

Cooling Air Handler

Digits 4,5,6 - Nominal Gross Cooling

Capacity (MBh)

060 = 5 Tons

090 = 7½ Tons

120 = 10 Tons

180 = 15 Tons

240 = 20 Tons

Digits 7 - Refrigerant Circuit

A = Single

B = Dual

Split System Heat Pump Model Nomenclature

TWA 0 9 0 A 3 00 A A

123 4 56 7 8 910 11 12

Air Handler Model Nomenclature

TWE 0 9 0 A 1 00 A A

123 4 56 7 8 910 11 12

Digits 8 - Electrical Characteristics

1 = 208-230/60/1

3 = 208-230/60/3

4 = 460/60/3

W = 575/60/3

Digits 9,10 - Factory Installed

Options

00 = Packed Stock

0S = Black Epoxy Coated Coil

Digits 8 - Electrical Characteristics

1 = 208-230/60/1

3 = 208-230/60/3

4 = 460/60/3

W = 575/60/3

Digits 9,10 - Factory Installed

Options

00 = Packed Stock

Model Number Description

10 SSP-PRC001-EN

Table 1. General Data — Heat Pumps

7½ Tons 10 Tons 15 Tons 20 Tons

Single Compressor

TWA090A3,A4,AW Single Compressor

TWA120A3,A4,AW Dual Compressor

TWA180B3,B4,BW Dual Compressor

TWA240B3,B4,BW

Cooling Performance(i)

(i) Cooling Performance is rated at 95°F ambient, 80°F entering dry bulb, 67°F entering wet bulb. Gross capacity does not include the effect of fan motor

heat. ARI capacity is net and includes the effect of fan motor heat. Certified in accordance with the Unitary Large Equipment certification program,

which is based on ARI Standard 340/360-00.

Gross Cooling Capacity

Matched Air Handler 91,000 124,000 182,000 240,000

Matched Heat Pump Only(ii)

(ii) Condensing unit only gross cooling capacity rated at 45°F saturated suction temperature and at 95°F ambient.

91,000 124,000 182,000 240,000

ARI Net Cooling Capacity(iii)

(iii) ARI net cooling capacity is calculated with matched blower coil and 25 feet of 1 3/8" or 1/2" OD interconnecting tubing.

89,000 120,000 176,000 234,000

EER(iv)

(iv) EER is rated at ARI conditions and in accordance with DOE test procedures.

Matched Air Handler 10.1 10.1 9.9 9.3

Heat Pump Only 11.5 11.1 10.9 10.3

Integrated Part Load Value(v)

(v) Integrated part load value is based on ARI Standard 340/360-00. Units are rated at 80°F ambient, 80°F entering dry bulb (DB), and 67°F entering

wet bulb (WB) at ARI rated cfm.

- - 11.0 10.5

System/Condensing Unit Power (kW) 8.70/7.95 11.91/11.07 17.77/16.62 24.99/23.20

Heating Performance

ARI Heating and Matched Air Handler

High Temperature Capacity 87,000 122,000 168,000 234,000

System kW/COP 7.68/3.3 10.82/3.2 16.10/3.1 22.42/3.1

Low Temperature Capacity 55,000 80,000 106,000 154,000

System kW/COP 6.73/2.4 9.62/2.4 14.16/2.2 19.54/2.30

Compressor

No./Type 1/Trane 3-DTM Scroll 1/Trane 3-DTM Scroll 2/Trane 3-DTM Scroll 2/Trane 3-DTM Scroll

No. Motors/HP 1/7.5 1/10 2/7.5 2/10

Motor RPM 3450 3450 3450 3450

Sound Rating (BELS)(vi)

(vi) Sound rating shown is tested in accordance with ARI Standard 270 or 370.

8.8 8.8 8.8 8.8

System Data(vii)

(vii) Refer to refrigerant piping applications manual for line sizing and line length.

No. Refrigerant Circuits 1 1 2 2

Suction Line (in.) OD 1 3/8 1 3/8 1 3/8 1 3/8

Liquid Line (in.) OD 1/2 1/2 1/2 1/2

Outdoor Coil - Type Plate Fin Plate Fin Plate Fin Plate Fin

Tube Size (in.) OD .375 .375 .375 .375

Face Area (sq ft) 19.2 29.5 38.5 50.2

Rows/FPI 2/18 2/18 2/18 2/18

Refrigerant Control Expansion Valve Expansion Valve Expansion Valve Expansion Valve

Outdoor Fan - Type Propeller Propeller Propeller Propeller

No. Used/Diameter (in.) 1/26 1/28 2/26 2/28

Drive Type/No. Speeds Direct/1 Direct/1 Direct/1 Direct1

CFM 5890 8200 11,780 16,240

No. Motor/HP 1/.50 1/1.00 2/.50 2/1.00

Motor RPM 1100 1100 1100 1100

Refrigerant Charge (Field Supplied)

(lbs of R-22)(viii)

(viii)Refrigerant (operating) charge is for condensing unit (all circuits) with matching blower coils and 25 feet of interconnecting refrigerant lines. All units

are supplied with a small nitrogen holding charge only.

18.00 31.50 36.00 48.50

General Data

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