Trane TWA075A User manual

Split System Heat Pumps
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
2
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8
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12
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24
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33
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52
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
3

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
a
Electrical Characteristics: 380-415/50/3
b
Summer Design Conditions: Entering
Evaporator Coil: 80 DB/67 WB
(27 DB/19 WB°C)
Outdoor Ambient: 95°F (35° C)
c
Total Cooling Load: 75 MBh (22kW)
d
Sensible Cooling Load: 53 MBh
(15.5 kW)
e
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:
a
Total Heating Load: 110 MBh (32.2 kW)
b
Outdoor Ambient (Winter): 17°F
(-8.3°C) DB
c
Indoor ReturnTemperature: 70°F
(21.1°C) DB
d
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.