Trane Axiom GEH006 User manual

WSHP-PRC001-EN
High Efficiency
Horizontal and Vertical
Water-Source Comfort System
AxiomTM
1/2 - 5 Tons — 60 HZ
12 1/2 - 25 Tons — 60 HZ

©American Standard Inc. 2002 WSHP-PRC001-EN
Imagine a full range of comfort utiliz-
ing efficiency, sound attenuation, in-
tegrated controls, and superior
maintenance accessibility... Trane
imagined it, then brought it to life.
Introducing models GEH and GEV
water source comfort solutions.
Model GEH (pictured below) is a ceil-
ing hung product that provides a
sleak, innovative shape, along with
convertibilityofthesupply-airandthe
return-airarrangement;serviceability
to maintenance components; indoor
air quality standards; sound attenua-
tion; and best of all, higher efficien-
cies with certified ARI-ISO 13256-1
performance and ASHRAE 90.1
standards.
Trane’s new design incorporates
system advantages such as:
Maximum return-air and
supply-air flexibility
Superior maintenance
accessibility
Dual-sloped, plastic drain pan
Multi-speed motor
Quiet unit design
Integrated controls
Orifice ring motor mounting
device as standard for ease of
motor service
High and low pressure
safeties as standard
Internal air-to-refrigerant coil
(horizontal design)
Introduction
1
2
3
4
5
6
7
8
9

WSHP-PRC001-EN 3
Table of Contents
Introduction 2
Features and Benefits 4
Options 4
Controls 16
Application Considerations 26
Selection Procedures 40
How to Select by Computer 40
Manual Selection Procedure 41
Model Number Description 44
General Data 46
Performance Data 49
Cool and Heat Performance 49
Correction Factors 84
Electrical Performance 85
Fan Performance 89
Waterside Economizer Performance 101
Sound Performance 102
Anti-Freeze Correction Factors 106
Controls 107
Wiring 107
Dimensional Data 111
Accessories 132
Thermostats 132
Options 138
Mechanical Specifications 140

4WSHP-PRC001-EN
Design Advantages
The horizontal configuration model
GEH product offers a range of
capacities from 1/2 to 5 ton.
This innovative design offers superior
fieldflexibility at thejobsitealong with
service accessibility.
Cabinet
Thecabinet designincludesa modular
platform that utilizes similar parts and
assemblies throughout the product
line. It is constructed of heavy gauge
(non-painted) galvanized metal for
maximum durability and corrosive re-
sistive exterior.
The cabinet front allows service ac-
cess for the controls and refrigeration
circuitry. Water-in/out connection and
high/low voltage hook-up is accom-
plished at the 45-degree corners on
the front-side of the equipment.
The new horizontal design offers six
product variations of return-air and
supply-air combinations which may
be order-specific or job-site modi-
fied.(See Figure 1 for service access
and Figure 2 for component platform
location).
Features and
Benefits
Figure 2: Component platform location
Figure 1: Horizontal service access

WSHP-PRC001-EN 5
Design Advantages
Like it’s horizontal (GEH) counterpart,
the GEV offers a range of capacities
from 1/2- to 5-ton, and 12 1/2 through
25-ton. Only, with the vertical design,
Trane includes a 3 1/3-ton
configuration physically sized for
condominium installations.
The GEV configuration incorporates
the unique modular component
platform design of the horizontal
configuration to provide a repetitious
look and feel to installation and
maintenance personnel.
This orchestrated family share fea-
tures and benefits with only a few vari-
ances.
Cabinet
Thecabinetdesignincludesa modular
platform that utilizes similar parts and
assemblies throughout the product
line. It is constructed of heavy gauge
(non-painted) galvanized metal for
maximum durability and corrosive
resistive exterior.
Thecabinetfrontallowsserviceaccess
for the controls and refrigeration
circuitry. Water-in/out connection,
drain connection, and high/low
voltage hook-up is accomplished at
the 45-degree chamfered corners on
the front-side of the equipment.
The vertical design offers four product
variations of return-air and supply-air
combinations.
The 1/2 through 5-ton supply-air ar-
rangement may be field convertible
with service kit to aid in stocking of a
singleunitvariation.(See Figure 3for
service access of the unit. See
Figure 4 for component platform
location.)
Features and
Benefits
Figure 3: Service access of
small tonnage vertical
Figure 4: Component platform location

6WSHP-PRC001-EN
Field Convertible
The bullet listing below shows the
available return-air/supply-air combi-
nations on the GEH model whether
specified by order or modified on-site
to meet your unique installation re-
quirement. The six combinations in-
clude:
Left return-air with left supply-air
combination
Leftreturn-airwithrearsupply-air
combination
Left return-air with right sup-
ply-air combination
Right return-air with left sup-
ply-air combination
Right return-air with rear
supply-air combination
Right return-air with right
supply-air combination
See Figure 5 for the six convertible
combinations.
More Flexibility
The GEV model is also capable of
on-sitemodifications.Withthevertical
configuration, the supply-air is easily
converted from a top supply-air to a
back supply-air with a service retrofit
kit. The return-air option is order spe-
cific. Thefour combinations include:
Right return-air with top sup-
ply-air combination
Right return-air with back sup-
ply-air combination
Left return-air with top supply
-air combination
Left return-air with back sup-
ply-air combination
See Figure 6 for the four supply-air/
return-air combinations.
Features and
Benefits
123
456
UNIT
FRONT UNIT
FRONT
UNIT
FRONT
UNIT
FRONT
UNIT
FRONT UNIT
FRONT
Figure 5: Six convertible combinations (GEH 1/2 through 5-ton)
1
2
3
4
5
6
UNIT
FRONT
1
UNIT
FRONT
2
UNIT
FRONT
3
UNIT
FRONT
2
1
3
4
Figure 6: Four combinations (GEV 1/2 through 5-ton)
4

WSHP-PRC001-EN 7
Vertical Advantages
The vertical (model GEV) configuration offers a range of
capacities from 12 1/2-ton through 25-ton.
The sleek, narrow cabinet is designed to fit through a
standard doorway for installation during new construc-
tion, or retrofit purposes. The units sturdy cabinet is de-
signed for durability, and corrosive resistance. The
upper panels feature an key hole hanging design for
ease of maintenance of the unit, allowing the panel to be
hooked into place when attaching the panel to the unit.
Thepanelsarealso sealedwitharubbergasketatall four
edges to help eliminate air from escaping around the
panel’s edge.
Supply/Return Combinations
The 12 1/2 through 25-ton GEV models are available in four sup-
ply-air/return-air combinations. These combinations are order
specific via the unit model number. The four combinations in-
clude:
Front return-air with back supply-air combination
Front return-air with top supply-air combination
Back return-air with front supply-air combination
Back return-air with top supply-air combination
The 12 1/2 to 25 ton verticals are most prevalently installed in
small equipment rooms or above the space on a mezzanine. They
are typically used to feed atriums, or core areas of a building
where a large heating or cooling load is required. See Figure 6
for the flexibility of the vertical unit offering of four supply-air/re-
turn-air combinations.
Features and
Benefits
1
2
1
3
4
2
3
4
Figure 6: Supply-air/return-air combinations

8WSHP-PRC001-EN
Hanging Device
The hanging bracket resides in the
chamfered corner of the horizontal
unit. This partially-concealed bracket
design eliminates added height,
width, or length to the product. The
brackets are factory mounted to short-
en job installation requirements.
The structural integrity of the design
helps assure no bracket deflection or
unit bowing from the unit’s weight.
Field return-air hook-up and filter
maintenance are more simplistic be-
cause of this innovative design. Isola-
tion for the hanging bracket is
provided with a neoprene rubber
grommet design. This isolation device
helps prevent sound vibration from
reaching the structural support mem-
bers of the building during compres-
sor start and stop. (See Figure 7 for
isolation device).
Drain Pan
The unit drain pan is composed of
plastic, corrosive resistive material.
The pan is positively sloped to comply
with ASHRAE 62 for (IAQ) indoor air
quality conformity.
Access to the drain pan is provided
through two access panels for clean-
ing purposes for all models. (See Fig-
ure 8 for plastic drain pan).
Important!
Although the drain pan is sloped, the
horizontal unit should be hung at a
dual angle (per local code) to provide
proper drainage of the condensate
system.
Cabinet Insulation
The cabinet insulation design meets
UL 181 requirements. The air stream
surface of the insulation is fabricated
of a non-biodegradable source.
Refrigeration Piping
The unit’s copper tubing is created
froma99%purecopperformationthat
conforms to the American Society of
Testing (ASTM) B743 for seamless,
light-annealed processing.
The unit’s copper refrigeration system
is designed to be free from contami-
nants and conditions such as drilling
fragments, dirt, or oil. This excludes
the possibility of these contaminants
from damaging the compressor mo-
tor.
Compressor
The unit’s design includes a wide vari-
ety of compressor motors to accom-
modate dedicated voltages and
tonnage sizes. The 1/2 ton through
1 1/2 ton products will embody a rota-
ry compressor design, where as unit
sizes ranging from 2 ton through 4 ton
include a reciprocating compressor
style, while the 5 ton unit contains a
scroll compressor. These different de-
signs allow Trane to provide the volt-
age variations along with noise
reduction. (See Figure 9 for recipro-
cating compressor).
The larger tonnage (GEV model)
12 1/2 through 25 ton units include a
dual circuit system which incorporate
scroll compressors.
Schrader Connections
The connections for the low and high
side of the refrigeration system are lo-
cateddirectly besidethecontrol boxat
the front (service access) panel. (See
Figure 10 for schrader connection lo-
cations).
Figure 7: Hanging bracket design
Figure 8: Plastic drain pan
Figure 9: Reciprocating compressor
Figure 10: Schrader connections
Features and
Benefits

WSHP-PRC001-EN 9
Figure 11: Coaxial water coil
Figure 12: Water connection device
Figure 13: 12 1/2-ton + water hook-up
Figure 14: Thermal expansion valve
Co-axial Water-to-Refrigerant Coil
The unit’s internal heat exchanging
water coil is engineered for maximum
heat transfer.
The copper or cupro-nickel seamless
tubing is a tube within a tube design.
The inner-water tube contains a deep
fluted curve to enhance heat transfer
and minimize fouling and scaling. It is
available in either copper or cu-
pro-nickel (selectable option) coil.The
outer refrigerant gas tube is made
from steel material. The coil is leak
tested to assure there is no cross leak-
age between the water tube and the
refrigerant gas (steel tube) coil. Co-ax-
ial heat exchangers are more tolerant
to freeze rupture. (See Figure 11 for
co-axial water coil).
Compressor and Co-axial Coil
Isolation
For the 1/2-ton through 5-ton units, vi-
bration isolation of the compressor
and co-axial water coil is accom-
plished by increasing the rigidity and
stiffness at the base. This platform in-
cludes double isolation to the com-
pressor and single isolation to the
co-axialwatercoil.Thecombinationin
thedoubleisolationprovideadditional
attenuation during compressor start
and stop.
Water Connections
(1/2 thru 5-ton)
The water-in/water-out connections to
the co-axial water coil are located on
the right-hand chamfered corner of
theunit.Thefittingsaremountedflush
to the chamfered wall to help limit
shipping damage.
The water connection devices are con-
structed of copper or bronze material
and include a National Female Pipe
Thread (NFPT) junction. The connec-
tions are attached to the unit’s cham-
fer corner to alleviate the need for a
back-up wrench during installation.
(See Figure 12 for water connection
device).
Water Connections
(12 1/2 thru 25-ton)
Water hookups for the larger tonnage
units are located internal to the unit to
help alleviate damage to the water
copperduring shipmentorjobstorage
of units prior to installation. Each unit
(although dual circuited) contains a
single supply and return water con-
nection. (See Figure 13 for large ton-
nage water hook-up). Fittings for the
supply and return are internally
threaded.
Table 1 defines water connection siz-
ing for 1/2 ton through 25 ton configu-
rations
Expansion Valve
All Trane water-source systems in-
clude an expansion valve flow meter-
ing device.
This thermal expansion valve (TXV) al-
lows the unit to operate with an enter-
ing fluid temperature from 25 F to 110
F, and entering air temperatures from
40 F to 90 F. The valve is designed to
meter refrigerant flow through the cir-
cuitry to achieve desired heating or
cooling.
Unlike cap-tube assemblies, the ex-
pansion valve device allows the exact
amountofrefrigerantrequiredtomeet
the coil load demands. This precise
metering by the TXV increases the ef-
ficiency ofthe unit.(See Figure 14 for
thermal expansion valve).
Table 1: Water connection sizes
Unit Size
(MBH)
Fitting Size
(in)
FPT
006 thru 015 1/2 FTP
018 thru 042 3/4 FTP
048 thru 060 1FPT
150 thru 180 1 5/8 FPT
240 thru 300 2 1/8 FPT
Features and
Benefits

10 WSHP-PRC001-EN
Reversing Valve
A system reversing valve (4-way
valve) is included with all heating/
cooling units. This valve is piped to be
energized in the cooling mode to al-
low the system to provide heat if valve
failureweretooccur.Oncethevalveis
energized for cooling, it will remain
energized until the control system is
turned to the OFF position, or a heat-
ing cycle is initiated.
Units with the cooling only option will
not receive a reversing valve. (See
Figure 15 for reversing valve).
Blower Motor
The 1/2 through 5-ton supply-air
(blower) motor is a multi-speed motor
with internal thermal overload protec-
tion. The motor bearings are perma-
nentlylubricatedandsealed.Standard
motors are rated from .20 ESP.Option-
alhighstatic motorsareratedfrom .40
to 1.40 ESP. All motors are factory
wired to the option selected. A high,
medium, and low speed tap is provid-
ed for field customization on all volt-
ages. The speed tap modification can
be made in the control box of the unit.
(See Figure 16 for blower motor).
Note: The 380, 415, 460 and 575
volt designs are provided in a dual
or three-speed version only. See
fan performance section for factory
ratings (Page 91).
The 12 1/2 through 25 ton GEV models
incorporate a belt driven motor selec-
tion into the design. The 12 1/2 and 15
ton units include a single fan assem-
bly, while the 20 and 25-ton units in-
clude dual fan assemblies. Because
the motor sheave and the motor base
are adjustable in the field, a greater
variation in external static pressures
are available. The large tonnage units
are capable of providing 0 ESP to 3.0
ESP allowing a higher static ductwork
to be applied on the mechanical sys-
tem when the application requires
extensive ductwork design. This is a
low cost alternative to purchasing, in-
stalling, and maintaining multiple
smaller tonnage units to meet the re-
quired air flow demand for the space.
Serviceability to the motor is made
through either of the two air-side ac-
cess doors for the horizontal configu-
ration, and through one air-side
access door for the 1/2 through 5-ton
vertical configuration. The motor and
blower wheel are removable by an or-
ifice ring mounted to the fan hous-
ing.
Access to the 12 1/2 through 25 ton
units is made through the back of unit
by way of two panels, and/or through
a side access panel if adjustment to
the motor belt or motor base are need-
ed. (See Figure 17 for motor
accessibility).
Blower Housing
The blower housing is constructed of
non-corrosive galvanized steel. A fac-
tory-mountedorifice ring isprovided
for ease of motor serviceability on the
1/2 through 5-ton direct drive units.
Allair-sidepanelsareinterchangeable
with one another for ease of field con-
vertibility of the supply-air on the GEH
model.
Air-Side Filter
Theair-sidefilter incorporates a 1-inch
thick (nominal) or 2-inch thick (nomi-
nal) disposable fiberglass option.
These filters include an average syn-
thetic dust weight arrestance of ap-
proximately 75%. This dust holding
capability includes a colorless, odor-
less adhesive to retain dirt particles
within the filter media after fiber con-
tact. (See Figure 18 for filter media)
Features and
Benefits
Figure 15: Reversing valve
Figure 16: Blower motor (direct drive)
Figure 17: Motor accessibility
Figure 18: Filter media