Trane GECA Owner's manual

Trane Axiom™
Water-Source
Comfort System
Standard Efficiency
Console Model GECA
(50 Hz)
WSHP-PRC004-EN
February 2001

WSHP-PRC004-EN©American Standard Inc. 2001
Introduction
Another Solution by Trane
Trane has developed another system
solution to add to their exceptional
water-source product line. Introducing
the Trane Axiom™(Model GECA) water-
source comfort system.
The attractive sloped top design
provides both fundamental performance
requirements, exceptional quality, and
added features to enhance maintenance-
ability and sound attenuation.
The design offers:
•Dual sloped plastic drain pan
•Hot gas reheat
(option)
•Electric heat
(option)
•Internal mount loop pump kit
(option)
•Motorized 25% outside-air
(option)
•Disconnect switch
(option)
•Field adjustable supply-air grille
•Integrated controls
•Quiet unit design
•Panel free filter maintenance
•High and low pressure switches as
standard
•Compact size

3
WSHP-PRC004-EN
Introduction
Model Number Description
General Data
Features and Benefits
Performance Data
Fan
Sound
Control Wiring
Dimensional Data
Accessories
Mechanical Specifications
Contents
2
4
5
6
24
42
43
46
49
58
64

WSHP-PRC004-EN4
Model Number
Description
DIGITS 1-3: UNIT CONFIGURATION
GEC = General Efficiency Console
DIGIT 4: DEVELOPMENT SEQUENCE A
DIGITS 5-7: NOMINAL SIZE (MBH)
006 = 6.0 MBH
009 = 9.0 MBH
012 = 12.0 MBH
015 = 15.0 MBH
DIGIT 8: VOLTAGE (Volts/Hz/Phase)
6 = 220-240/50/1
DIGIT 9: HEAT EXCHANGER
1 = Copper Water Coil
2 = Cupro-nickel Water Coil
DIGIT 10: DESIGN SEQUENCE
A = First Design
DIGIT 11: REFRIGERATION CIRCUIT
0 = Heating and Cooling Circuit
2 = Heating and Cooling Circuit w/ Hot Gas
Reheat
A = Cooling ONLY Circuit
C = Cooling ONLY Circuit w/ Hot Gas Reheat
DIGIT 12: BLOWER CONFIGURATION
1 = Standard Blower
DIGIT 13: CUSTOMER CHANNEL
1 = Boiler / Tower Design
2 = Geothermal Design
5 = International Design
DIGIT 14: OPEN DIGIT
0 = Standard Design
DIGIT 15: SUPPLY-AIR ARRANGEMENT
0 = Standard Supply-Air Arrangement
DIGIT 16: RETURN-AIR ARRANGEMENT
0 = Standard Return-Air Arrangement
DIGIT 17: CONTROL TYPES
0 = Basic 24V Controls
D = Deluxe 24V Controls
C = Tracer ZN.510 Controls
A = TUC Stand-alone Controls
T = TUC/ICS Control
DIGIT 18: T’STAT/SENSOR LOCATION
0 = Wall Mounted Location
1 = Unit Mounted Location with Standard
Entry
2 = Unit Mounted Location with Keylock Entry
DIGIT 19: FAULT SENSORS
0 = No Fault Sensor
1 = Condensate Overflow Sensor
2 = Filter Maintenance Timer
3 = Condensate Overflow and Filter
Maintenance Timer
4 = Fan Status Sensor
5 = Dirty Filter Sensor
6 = Condensate Overflow and Fan Status
Sensor
7 = Condensate Overflow and Dirty Filter
Sensor
8 = Fan Status and Dirty Filter Status Sensor
9 = Fan Status, Dirty Filter Status and
Condensate Overflow Sensor
DIGIT 20: TEMPERATURE SENSOR
0 = No Additional Temperature Sensor
1 = Entering Water Sensor
2 = Return-Air/Mixed-Air Temperature Sensor
3 = Entering Water/Mixed-Air
Temperature Sensor
DIGIT 21: NIGHT SETBACK
0 = No Night Setback Relay
N = Night Setback Relay
DIGIT 22: ELECTRIC HEAT OPTION
0 = No Electric Heat
2 = Boilerless Control/Electric Heat (minimum)
3 = Boilerless Control/Electric Heat
(maximum)
DIGIT 23: UNIT MOUNTED DISCONNECT
0 = No Unit Mounted Disconnect
A = Power Cord/Receptacle Box Disconnect
B = Power Cord/Receptacle Box Disconnect
with Circuit Breaker
DIGIT 24: FILTER TYPE
0 = No Filter (Chassis ONLY)
1 = 1-inch [25.4 mm] Throwaway Filter
DIGIT 25: ACOUSTIC ARRANGEMENT
0 = Sound Attenuation Package
DIGIT 26: FACTORY CONFIGURATION
0 = Standard Factory Configuration (chassis,
cabinet, and subbase)
1 = Chassis ONLY
2 = Low Height Factory Configuration
(chassis, cabinet, and subbase)
3 = Extended Length Factory Configuration
(chassis, cabinet, and subbase)
DIGIT 27: PAINT COLOR
0 = No Paint Selection Available (chassis
ONLY)
1 = Deluxe Beige
2 = Cameo White
3 = Soft Dove
DIGIT 28: OUTSIDE AIR OPTION
0 = No Outside Air
1 = Outside Air Opening
2 = Motorized Outside Air Option (2-position)
DIGIT 29: PIPING ARRANGEMENT
L = Left Hand Piping Arrangement
R = Right Hand Piping Arrangement
2 = Left Hand Piping Arrangement with
Internal Mounted Loop Pump Kit
3 = Right Hand Piping with Internal Mounted
Loop Pump Kit
DIGITS 30-36: DOES NOT APPLY TO THE
CONSOLE PRODUCT
0000000 = Digits 30-36 Does NOT Apply to
the Horizontal/ Vertical Products
Water-Source Comfort System
GEC A012 6 1 A 0 1 1 0 0 0 D 0 1 0 N 0 0 1 0 0 1 0 L 000000
1-3 4 5-7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30-36

5
WSHP-PRC004-EN
General Data
Table GD-1 –Physical Data (GECA 006-009)
Model: GECA 006-009 006 009
Unit Size Length of cabinet (in) [mm] 48 or 63 [1219 or 1600] 48 or 63 [1219 or 1600]
Height (in) [mm] 25 or 22 1/2 [635 or 571] 25 or 22 1/2 [635 or 571]
Width (in) [mm] 12 [305] 12 [305]
Compressor Type Rotary Rotary
R-22 Refrigerant (lbs) [kg] Heating and Cooling 1.19 [.54] 1.22 [.55]
Cooling Only 1.06 [.48] 1.16 [.53]
Hot Gas Reheat n/a 1.375 [.62]
Approximate Weight without Pallet (lbs) [kg] Unit 192 [87.1] 204 [92.5]
Chassis Only 144 [653] 156 [70.8]
Approximate Weight with Pallet (lbs) [kg] Unit 222 [100.7] 234 [106]
Chassis Only 174 [78.9] 186 [84.4]
Filter Size (standard height - 25" [635 mm]) 1 x 10 x 32 3/8 [25.4 x 254 x 822] 1 x 10 x 32 3/8 [25.4 x 254 x 822]
Filter Size (low height - 22 1/2" [571 mm]) 1 x 7 3/4 x 30 5/8 [25.4 x 197 x 779] 1 x 7 3/4 x 30 5/8 [25.4 x 197 x 779]
Blower Wheel Size (in) [mm] (2) 5 1/4 x 8 1/8 [133 x 206] (2) 5 1/4 x 8 1/8 [133 x 206]
Table GD-2 –Physical Data (GECA 012-015)
Model: GECA 012-015 012 015
Unit Size Length of cabinet (in) [mm] 48 or 63 [1219 or 1600] 48 or 63 [1219 or 1600]
Height (in) [mm] 25 or 22 1/2 [635 or 571] 25 or 22 1/2 [635 or 571]
Width (in) [mm] 12 [305] 12 [305]
Compressor Type Rotary Rotary
R-22 Refrigerant (lbs) [kg] Heating and Cooling 1.75 [.79] 2.44 [1.1]
Cooling Only 1.5 [.68] 1.88 [.85]
Hot Gas Reheat n/a n/a
Approximate Weight without Pallet (lbs) [kg] Unit 203 [92.1] 210 [92.3]
Chassis Only 155 [70.3] 162 [73.5]
Approximate Weight with Pallet (lbs) [kg] Unit 233 [106] 240 [99.8]
Chassis Only 185 [83.9] 192 [87.1]
Filter Size (standard height - 25" [635 mm]) 1 x 10 x 32 3/8 [25.4 x 254 x 822] 1 x 10 x 32 3/8 [25.4 x 254 x 822]
Filter Size (low height - 22 1/2" [571 mm]) 1 x 7 3/4 x 30 5/8 [25.4 x 197 x 779] 1 x 7 3/4 x 30 5/8 [25.4 x 197 x 779]
Blower Wheel Size (in) [mm] (2) 5 1/4 x 8 1/8 [133 x 206] (2) 5 1/4 x 8 1/8 [133 x 206]

WSHP-PRC004-EN6
Features and
Benefits
Figure FB-1 –Cabinet Construction
Figure FB-2 –Hook-Secure Fit
Design Advantages
The console configuration model GECA
product offers a range of capacities 1/2to
11/4ton.
This compact HVAC advantage supports
multiple application requirements in the
commercial conditioning industry. This
includes:
•Hotel rooms
•Offices
•Condominiums
•Assisted living facilities
•Dormitories
Cabinet
The cabinet is constructed of heavy
gauge metal for maximum durability.
The cabinet finish is produced by a
corrosion resistant electrostatic powder
paint coating in the following
colors:
•Deluxe beige
•Cameo white
•Soft dove
Building Block Design
The console configuration maintains a
tri-building block design. It includes
•Cabinetry
•Chassis
•Subbase
These building blocks may be ordered in
several configurations. They include:
•Standard configuration
(cabinet,
chassis, and subbase)
•Low height configuration
(chassis,
cabinet, and short subbase)
•Extended length for unit mounted loop
pump kit
(cabinet, chassis, and
subbase)
•Chassis ONLY
The cabinet design includes a hook-
secure fit
that allows complete access to
piping and electrical hookup for ease of
maintenance and serviceability. The
single cabinet assembly is securely
fastened into the wallsleeve.
(See Figure
FB-2 for hook-secure fit.)

7
WSHP-PRC004-EN
Features and
Benefits
Field Flexibility
Piping and electrical connections to the
console are made in either the left or
right hand end pocket. The unit
refrigeration platform and the unit
control box is maintained in the same
location whether left or right hand
piping, standard unit cabinetry, extended
unit cabinetry, or low height unit
cabinetry has been specified. This cloned
platform poses a common look and feel
to the installer, as well as aids in
troubleshooting during service or
maintenance checkups.
Differences
Right Hand Piping
Console units ordered with a right hand
piping connection have the end pocket
located on the right hand side of the unit.
This end pocket provides room for
connecting field supply, return, and
condensate piping to the unit. It also
provides space for the high and low
voltage connections.
See Figure FB-3 for
right hand piping.
Left Hand Piping
Console units ordered with a left hand
piping connection have the end pocket
located on the left hand side of the unit.
This end pocket provides room for the
field supply, return, and condensate
piping connection to the unit. Installation
for the high voltage connection is also
made in the left hand end pocket.
Installing the low voltage controls
(thermostat/sensor hookup) is ALWAYS
made on the right hand side of the unit.
The low voltage termination for
thermostat or sensor wires may be run
along the back side of the chassis to the
right hand side of the unit for
connection.
See Figure FB-4 for left hand
piping.
Note:
Units containing the unit mounted
control option will ship from the factory
prewired. No low voltage hookup is
required.
Figure FB-3 –Right Hand Piping
Figure FB-4 –Left Hand Piping

WSHP-PRC004-EN8
Features and
Benefits
Figure FB- 6 –Wall Sleeve
Wall Sleeve
The cabinets wall sleeve is attached to
the wall by (4) four, #10 field provided
screws. This rigid design allows for ease
of separation from the cabinet assembly
during service or installation situations.
The wall sleeve is painted the same color
as the cabinet for aesthetic purposes.
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 the front chassis access panel.
The drain pan is removable for cleaning.
Cabinet Insulation
The cabinet insulation design meets UL
181 requirements. The air stream surface
of the insulation is fabricated of a non-
biodegradable source.
The insulation in the wet section of the
cabinet complies with ASHRAE standard
62 to accommodate (IAQ) indoor air
quality standards.
Refrigeration Piping
The unit’s copper tubing is created from
a 99% pure copper formation that
conforms to the American Society of
Testing (ASTM) B743 for seamless, light-
annealed processing.
The unit’s copper refrigeration system is
manufactured to be free from
contaminants and conditions such as
drilling fragments, dirt, or oil. This
reduces the possibility of these
contaminants damaging the compressor
motor.
Schrader Connections
The connections for the low and high
side of the refrigeration system are
located in the chassis portion of the unit
at the front of the refrigeration assembly.
Access to the schrader connections are
made through the refrigeration service
access panel.
Air-to-Refrigerant Coil
The air-to-refrigerant heat exchanger is
constructed of staggered copper tubes
with die-formed corrugated lanced
aluminum fins. The fins are then
mechanically bonded to the tubes
through expansion.
The maximum working pressure of the
coil is 450 psig. It is designed for
maximum capacity with an additional
benefit of physical unit size reduction.
Coil specifications for the GECA unit is
listed below.
Compressor
The unit’s design includes a rotary
compressor motor in dedicated voltages
and tonnage sizes to aid in voltage
variations along with noise reduction of
the unit.
As an added benefit, Trane double
isolates the compressor and the
mounting plate assembly in the unit to
reduce sound vibration during
compressor operation.
Figure FB-7 –Plastic Drain Pan
Figure FB-8 –Rotary Compressor
Figure FB-9 –Schrader Connections
Table FB-1 –Coil Specifications
Unit Size Number of Rows Fins/inch
006 3 14
009 2 14
012 3 14
015 4 14

9
WSHP-PRC004-EN
Features and
Benefits
Coaxial 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-tube contains a deep fluted
curve to enhance heat transfer and
minimize fouling and scaling. Coaxial
heat exchangers are more tolerant to
freeze rupture.
Compressor and Coaxial Coil Isolation
Vibration isolation for the compressor
and coaxial water coil is accomplished
by increasing the rigidity and stiffness at
the base for the compressor, and at the
back of the chassis for the coaxial water
coil. This platform includes double
isolation to the compressor and single
isolation to the coaxial water coil.
Water Connections
The water-in/water-out connections to
the coaxial water coil are located in the
right-hand or left hand end pocket
(option specific).
The water-in/water-out tubes are a
5/8-inch [14.7 mm] OD sweat connection.
The connection is available in either a
left hand or right hand piping end
pocket.
Figure FB-10 –Coaxial Water Coil Figure FB-11 –Water Connection
Expansion Valve
All Trane water-source systems include
an expansion valve flow metering
device.
This thermal expansion valve (TXV)
allows the unit to operate with an
entering fluid temperature from 25 F to
110 F [-3.9 C to 43.3 C], and entering air
temperatures from 40 F to 90 F [4.4 C to
32.2 C]. The valve precisely meters
refrigerant flow through the circuitry to
achieve desired heating or cooling.
Unlike cap-tube assemblies, the
expansion valve device allows the exact
amount of refrigerant required to meet
the coil load demands. This precise
metering by the TXV increases the
efficiency of the unit.
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. Once the valve is
energized for cooling, it will remain
energized until the control system is
turned to the OFF position, or a heating
cycle is initiated.
Units with the cooling only option will
not receive a reversing valve.
Figure FB-12 –Expansion Valve
Figure FB-13 –Reversing Valve
Blower Housing
The blower housing is constructed of
non-corrosive galvanized steel.
Serviceability to the housing is made
through the chassis air-side front panel.
The fan housing is mounted onto a
fanboard assembly which also includes
the fan wheel, and fan motor. This fan
board assembly may be easily removed
from the chassis by sliding the fan board
frontward in maintenance or service
situations.
Figure FB-14 –Fan Board Assembly

WSHP-PRC004-EN10
Features and
Benefits
Figure FB-15 –Blower Motor
Blower Motor
The supply-air (blower) motor is a multi-
speed motor with internal thermal
overload protection. The motor bearings
are permanently lubricated and sealed.
Standard motors are rated from 200
CFM at low speed (unit size 006) to 425
CFM at high speed (unit size 015).
All motors are factory wired for low and
high speed options. Switching for speed
control is located in the unit control
panel.
(See Figure FB-15 for blower
motor and Figure FB-16 for fan switching
control panel.)
See fan performance section for factory
ratings of low and high speed settings.
Air-Side Filter
The air-side filter incorporates a 1-inch
[25.4 mm] thick (nominal) disposable
fiberglass option. The filter includes an
average synthetic dust weight arrestance
of approximately 75%. This dust holding
capability includes a colorless, odorless
adhesive to retain dirt particles within
the filter media after fiber contact.
The filter is accessible through the
return-air portion of the unit subbase.
Panel removal is not necessary to
facilitate filter maintenance for the
standard height unit configuration.
Figure FB-16 –Fan Switch Control Panel
Figure FB-17 –Filter Media
Supply-Air Registers
Supply-air registers for the GECA
product are constructed of a plastic,
corrosive resistive material. The registers
include a snap-in deflection design to
simplify installation, as well as facilitate
the ability to apply a bi-directional
arrangement across the register.
Hinged Control Box
Controls for the console unit are housed
on the right-hand side of the chassis. The
box dwells above the refrigeration
section of the chassis.
Access to the controls are made by way
of a hinged control box. This hinged box
allows easy access for service and
installation of the controls portion of the
chassis.
Figure FB-18 –Bi-directional Registers
Figure FB-19 –Hinged Control Box