Trane Heat Pump TWA PRC001 EN User Manual

Split System Heat Pumps

7 1/2 through 20Ton - 50 Hz

Air Handlers

5 through 20Ton - 50 Hz

July 2000

TWA-PRC001-EN

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Contents

Introduction

Features and Benefits

Application Considerations

Selection Procedure

Model Number Description

General Data

Performance Data

Cool and Heat Performance

Fan Performance

Electric Power

Connection andWiring

Dimension andWeights

Mechanical Specifications

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Features and

Benefits

Heat Pumps

Air Handlers

• 3-D^®Scroll compressors

• Low voltage terminal board

• Expansion valve(s)

• ModelTWA155-200B have dual

compressors with independent

refrigerant circuits

• Compressor motor overload protection

• Control transformer

• Convertible

• PVC double-sloped, removeable drain

pan

• Fan relay

• High and low pressure cut-out

switches

• Efficient evaporator coil

• Baked enamel finish

• Filter access panel

• Internal pressure relief valve

• Liquid line filter drier, factory installed

• Holding charge of dry nitrogen

• Copper tube, aluminum plate fin coils

• Low ambient cooling to 35° F (1.7° C)

as manufactured

• Weather resistant baked enamel finish

• Heavy gauge steel cabinet

• Mounting/lifting rails under base

• 1” (25.4 mm) throwaway filters

standard with provisions for field

supplied 2”

(50.8 mm) filters

• Adjustable belt drive motor

• Single point power entry to electric

heaters

• Refrigerant piping and/or electrical

connections provided from either side

Odyssey^™air handler versatility is further

increased by a complete line of optional

accessories designed to match and easy

to install:

All condensing units offer these optional

accessories:

• Head Pressure Control — Low Ambient

CoolingTo 0° F (-17.8° C)

• Coil Guards Kits

• Isolators both Rubber-in-Shear and

SpringType

• Discharge Plenum and Grille

• Return Grille

• Anti-Short-Cycle Kit

• Subbase

• Time Delay Relay

• Electric Heaters

• High Static Evaporator Motor

• Isolators both Rubber-in-Shear and

SpringType

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Features and

Benefits

Heat Pump Options

Trane split systems have been specified

in thousands of applications and you’ll

find Odyssey will win you even more

jobs with it’s smaller, more manageable

cabinet.

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

The Odyssey^™split system product line

includes heat pumps in both single and

dual compressor options.

TWA075A andTWA100A single

compressor models feature single

refrigeration circuitry lowering job

installation costs by requiring only one

set of refrigerant lines.These units are

ideal for either the low cost, new

construction jobs as well as renovation

and replacement buildings.

Air Handlers Offer More Flexibility

Flexibility is a key to meeting changing

market requirements. Odyssey split

systems offer various compressor

options and 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 or

reconfiguration of the drain pan to make

either airflow application work. All the air

handlers feature factory installed belt

drive and ball bearing evaporator fans

with adjustable sheaves for maximum

airflow performance.The standard motor

on theTWE100A air handler will deliver

4000 cfm (1888 l/s) at 0.8” (20.32 mm)

ESP. Plus oversized motors are available

for higher static applications.

• Subbase

• Electric Heaters

• High Static Evaporator Motor

• Isolators both Rubber-in-Shear and

SpringType

• A Full Line of Thermostats

In addition, Odyssey modelsTWA155B

throughTWA200B are dual compressor

units that give true standby protection; if

one compressor fails, the second will

automatically start-up. Also, the first

compressor can be serviced without

shutting down the unit since refrigerant

circuits are independent.

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

condensing units to let you select the

proper match between capacity and

load. Condensing units can also be

matched withTrane built-up air handlers.

These matched systems can be quickly

engineered for specific applications.

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.

LowAmbient Cooling Operation

Each condensing unit can operate to

35° F (1.7° C) as standard. An accessory

Head Pressure Control gives you the

capability to operate to 0° F (-17.8° C). All

condensing units offer these accessories:

• Head Pressure Control

• Coil Guard Kits

• Isolators both Rubber-in-Shear and

SpringType

• Anti-Short-Cycle Kit

• Time Delay Relay

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Application

Considerations

Application of this product should be

within the catalogued airflow and

performance considerations.The System

Selection Program will simulate product

performance for a set of given

conditions. It is recommended that the

program should be run at the lowest

outdoor ambient and supply air flow

rates requiring cooling or heating

operation for a particular unit. For more

information on the System Selection

Program contact your localTrane

Representative.

should be reviewed with the localTrane

Representative.

pressure control will allow operation to

0° F (-17.8° C) outdoor ambient.When

using these units with control systems

such as bypass changeoverVariable Air

Volume, consider the requirement for a

head pressure control to allow low

ambient cooling.

LowAmbient Cooling

As manufactured, these units can

operate to 35° F (1.7° C) in the cooling

mode of operation. An accessory head

Clearance Requirements

The recommended clearances identified

with unit dimensions should be

maintained to assure adequate

serviceability, maximum capacity and

peak operating efficiency. Actual

clearances that appear inadequate

Typical Horizontal Air HandlerApplication

TypicalVerticalAir Handler Application

Typical Split System Application

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Selection

Procedure

Cooling Capacity

actualTotal Static Pressure is 1.10 - 0.10 =

1.00 in. (27.9 - 2.5 = 25.4 mm)

(275 - 25 = 250 Pa)

Air Delivery Selection

Step 1 — Calculate the building’s total

and sensible cooling loads at design

conditions. Use theTrane calculation

form or any other standard accepted

method.

External static pressure drop through the

air distribution system has been

calculated to be 0.77 inches (19.6 mm) of

water gauge. FromTable PD-24 static

pressure drop through the electric heater

is 0.12 inches (3.0 mm) of water (0.77 +

0.12 = .89 in.) (19.6 + 3.0 = 22.6 mm).

EnterTable PD-15 forTWE090A4 at 2500

cfm (1180 l/s) and .90 static pressure.The

standard motor at 790 rpm will give the

desired airflow.

With 2500 cfm (1180 l/s) and 1.00 inches

(250 Pa) (0.8 kW),Table 26-1 shows a 1.07

Bhp.

Step 2 — Size the equipment usingTable

PD-1. Match the cooling loads at design

conditions.

Note:The formula below the table can be

used to calculate Fan Motor Heat,

Constant x Motor Power =

Fan Motor Heat

Example:The following are the building

cooling requirements

3.5 x Bhp = MBh

3.5 x 1.07

= 3.75 MBh

Electrical Characteristics: 380-415/50/3

1.375 x (kW) = kW

1.375 x 0.8 = 1.1 kW

Summer Design Conditions: Entering

Evaporator Coil: 80 DB/67WB

(27 DB/19WB° C)

NetTotal Cooling Capacity

= 79.6 MBh – 3.75 = 75.85 MBh

= 23.3 kW - 1.1 = 22.2 kW

Net Sensible Cooling Capacity

= 57.1 MBh – 3.75 = 53.35 MBh

= 16.7 MBh - 1.1 = 15.6 kW

Outdoor Ambient: 95° F (35° C)

Total Cooling Load: 75 MBh (22kW)

Sensible Cooling Load: 53 MBh

(15.5 kW)

Heating Capacity

Step 1 — Calculate the building heating

load using theTrane calculation form or

any other standard accepted method.

Airflow: 2500 cfm (1,180 l/s)

External Static Pressure: 0.77 in.

(19.6 mm) w.g. (193 Pa)

Step 2 — Size the equipment usingTable

PD-9 to match the heating loads at

Table PD-1 shows that aTWA075A

matched with aTWE075A has a gross

cooling capacity of 82.4 MBh (24.1 kW)

and 59.5 MBh (17.4 kW) sensible capacity

at 95 DB (35° C) ambient and 2500 cfm

(1180 l/s) and 80 DB/67WB (27 DB/19WB)

air entering the evaporator.

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

To find the net cooling capacities, fan

motor heat must be subtracted.

Determine the total unit static pressure:

Indoor ReturnTemperature: 70° F

(21.1° C) DB

External Static

0.77 in

Airflow: 2500 cfm (1180 l/s)

Table PD-9 indicates the mechanical

heating portion of the heat pump will

provide 37.5 MBh (11.0 kW) for the winter

design conditions.

(19.6 mm) (193 Pa)

Standard Filter

0.10 in

1 in. (25.4 mm)

(2.5 mm) (25 Pa)

Supplementary Electric Heat

0.23 in

Step 3 — Because 37.5 MBh (11.0 kW) is

less than the building’s required heating

capacity, a supplementary heater must

be selected. 110 - 37.5 = 72.5 MBh (32.2 -

11.0 = 21.2 kW) minimum heater capacity.

(5.8 mm) (57 Pa)

Total Static Pressure

1.10 in

FromTable PD-25, the 24.22 kW heater

has a capacity of 82,670 Btuh. FromTable

34-1, 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.

(27.9 mm) (275 Pa)

Note:The Evaporator Fan Performance

Table has included the effect of a 1 in.

(25.4 mm) filter already.Therefore, the

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Model

Number

Description

Split System Heat Pump Model Nomenclature

Digit 8 - Electrical Characteristics

Digits 1, 2, 3 - ProductType

TWA = Split System Heat Pump

D = 380-415/3/50

Digit 9, 10 - Factory - Installed Options

Digits 4, 5, 6 - Nominal Gross Cooling Capacity

(MBh)

00 = Packed Stock

0S = Black Epoxy Coated Coil

075 = 75

100 = 100

155 = 155

200 = 200

Digit 11- Minor Design Sequence

D = Fourth

Digit 12- Service Digit

Digit 7- Major Development Sequence

A = First

A = Single Compressor

B = Dual Compressor

Air Handler Model Nomenclature

Digit 8 - Electrical Characteristics

Digits 1, 2, 3 - ProductType

D = 380-415/3/50

TWE = Cooling Convertible

Digit 9, 10 - Factory - Installed Options

00 = Packed Stock

Digits 4, 5, 6 - Nominal Gross Cooling

Capacity (MBh)

Digit 11- Minor Design Sequence

C = Third

050 = 50

075 = 75

100 = 100

155 = 155

200 = 200

Digit 12- Service Digit

A = First

Digit 7- Refrigerant Circuit

A = Single

B = Dual

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General

Data

(Heat Pumps)

Table GD-1 — General Data — Heat Pumps

TWA075A

TWA100A

Cooling Performance¹

Gross Cooling Capacity, BTUH (KW)

Matched Air Handler, BTUH (KW)

Heat Pump Only², BTUH (KW)

ARI Net Cooling Capacity³

System Power KW

Heat Pump Only Power KW

Heating Performance

ARI Heating with Matched Air Handler

HighTemperature Capacity, BTUH (KW)

LowTemperature Capacity, BTUH (KW)

Compressor

82,000 (23.97)

109,000 (31.97)

105,000 (30.75)

10.32

82,000 (23.97)

80,000 (23.35)

7.36

6.61

9.22

75,000 (21.82)

47,000 (13.84)

106,000 (31.05)

69,000 (20.29)

Number

Type

No. Speeds

3D^®Scroll

No. Motors

Motor HP (KW)

6.25 (4.7)

2875

8.8

8.33 (6.21)

2875

8.8

Motor RPM

ARI Sound Rating (Bels)⁴

System Data⁵

No. Refrigerant Circuits

Suction Line, in. (mm) OD

Liquid Line, in. (mm) OD

Outdoor Coil —Type

Tube Size, in. (mm) OD

Face Area, sq. ft. (m²)

Rows

1.375 (34.9)

0.500 (12.7)

Plate Fin

0.375 (9.5)

19.2 (1.78)

1.375 (34.9)

0.500 (12.7)

Plate Fin

0.375 (9.5)

24.0 (2.23)

Fins Per Inch (Fins per mm)

Outdoor FanType

No. Used

18 (457)

Propeller

18 (457)

Propeller

Diameter, in. (mm)

DriveType

26.00 (660.4)

Direct

28.00 (711)

Direct

No. Speeds

CFM⁶, (L/S)

4700 (2218.2)

6700 (3161.7)

No. Motors

Motor HP (KW)

0.33 (.24)

925

18.0 (8.16)

0.75 (.56)

925

24.25 (11.0)

Motor RPM

R-22 Refrigerant Charge, Lbs⁷(Kg)

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 210.

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 210/240/340. 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.

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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General

Data

(Heat Pumps)

Table GD-2 General Data — Heat Pumps

TWA155B

TWA200B

Cooling Performance¹

Gross Cooling Capacity, BTUH (KW)

Matched Air Handler, BTUH (KW)

Condensing Unit Only², BTUH (KW)

ARI Net Cooling Capacity³

166,000 (48.57)

216,000 (63.24)

209,000 (61.18)

196,000 (61.18)

20.61

161,000 (47.04)

160,000 (46.74)

14.98

System Power KW

Condensing Unit Power KW

13.20

18.52

Heating Performance

ARI Heating with Matched Air Handler

HighTemperature Capacity, BTUH (KW) 151,000 (44.27)

206,000 (60.26)

135,000 (39.66)

LowTemperature Capacity, BTUH (KW)

95,000 (27.67)

Compressor

Number

Type

No. Speeds

3D^®Scroll

No. Motors

Motor HP

6.25 (4.7)

2875

8.8

8.33 (6.21)

2875

8.8

Motor RPM, (KW)

ARI Sound Rating (Bels)⁴

System Data⁵

No. Refrigerant Circuits

Suction Line, in. (mm) OD

Liquid Line, in. (mm) OD

Outdoor Coil —Type

Tube Size, in. (mm) OD

Face Area, sq. ft. (m²)

Rows

1.375 (34.9)

0.500 (12.7)

Plate Fin

0.375 (9.5)

38.4 (3.57)

1.375 (34.9)

0.500 (12.7)

Plate Fin

0.375 (9.5)

48.0 (4.46)

Fins Per Inch(mm)

Outdoor FanType

No. Used

18 (457)

Propeller/Propeller

18 (457)

Propeller/Propeller

Diameter, in. (mm)

DriveType

26.00/26.00 (660.4/660.4)

Direct/Direct

28.00/28.00 (711/711)

Direct/Direct

13400 (6323.5)

No. Speeds

CFM⁶, (L/S)

9800 (4624.6)

No. Motors

Motor HP, (KW)

Motor RPM

0.33 (.24)

925

36.0 (16.32)

0.75 (.56)

925

48.5 (22.0)

R-22 Refrigerant Charge, Lbs⁷(Kg)

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 210.

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-