Trane CDQ Operating and safety instructions

Installation
Operation
Maintenance
CDQ™
Desiccant Wheels
for Climate Changer™ Air Handlers
June 2006 CDQ-SVX01A-EN
Part No. X39641062010

NOTICE:
Warnings and Cautions appear at appropriate sections throughout this
manual. Read these carefully.
WARNING
...indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION
...indicates a potentially hazardous situation which, if not avoided, may result
in minor or moderate injury. It may also be used to alert against unsafe
practices.
CAUTION
...indicates a situation that may result in equipment or property-damage-only
accidents.
© 2007 Trane All rights reserved

CDQ-SVX01A-EN 3
Introduction
Use this manual to install, startup,
operate, and maintain the CDQ
desiccant wheel module for Trane
Climate Changer™ air handlers.
Carefully review the procedures
discussed in this manual to minimize
installation and startup difficulties.
The startup and adjustment
procedures discussed in this manual
should be done by qualified,
experienced HVAC technicians.
Your personal safety and the proper
operation of this machine depend
upon the strict observance of these
precautions.
Product Information
Trane CDQ™ (Cool, Dry, Quiet)
desiccant dehumidification wheel is
a water vapor transfer tool. The
TraneCDQ™desiccantwheel isused
to enhance the dehumidification
performance of a traditional cooling
coil. The wheel is configured in
series with the coil such that the
“regeneration” side of the wheel is
located upstream of the coil and the
“process” side of the wheel is
located downstream of the cooling
coil.The wheel recirculates thewater
vapor trapped downstream of the
cooling coil back into the air
upstream of the coil where the coil
removes it through condensation.
This process is accomplished
without the need for a second
regenerationairstream.Theaddition
of the CDQ desiccant wheel to the
system enhances the
dehumidification performance of the
traditional cooling coil.
Protecting the
Environment
World environmental scientists have
concluded, based on the best
currently available evidence, that
ozone in our upper atmosphere is
being reduced due to the release of
CFC (chlorofluorocarbon) fully
halogenated compounds.
Trane urges that all HVAC service
technicians working on Trane
equipment, or any manufacturer’s
products, make every effort to
eliminate, if possible, or vigorously
reduce the emission of CFC, HCFC
(halocarbon that contains fluorine,
chlorine,carbon, andhydrogen),and
HFC (halocarbon that contains only
fluorine, carbon, and hydrogen)
refrigerants to the atmosphere
resulting from installation,
operation, routine maintenance, or
major service on this equipment.
Always act in a responsible manner
to conserve refrigerants for
continueduse even when acceptable
alternatives are available.
Refrigerant used in any type of air-
conditioning or refrigerating
equipment should be recovered for
reuse, recovered and/or recycled for
reuse, reprocessed (reclaimed), or
properly destroyed, whenever it is
removed from equipment. Never
release it to the atmosphere!

Contents
4CDQ-SVX01A-EN
Contents
Introduction
Product Information........................................................3
Protecting the Environment...........................................3
General Information
Operating Environment..................................................5
Controls ...........................................................................5
Ultraviolet (UV) Lights....................................................6
Operation
CDQ Wheel Startup.........................................................7
Wiring
CDQ Desiccant Wheel Cassette .....................................8
Routine Maintenance
Cleaning the Desiccant Wheel.......................................9
Cleaning the Motor.......................................................10
Cleaning the Module ....................................................10
Bearing and Motor Lubrication....................................10
Drive Belt Tension.........................................................10
Service and Repair
Procedure for Internal Bearing Replacement.............11
Procedure for External Bearing Replacement............14
Drive Belt Adjustment/Replacement...........................16
Seal Adjustment............................................................16
Drive Motor and Pulley Replacement .........................17
Troubleshooting
Probable Causes/Actions..............................................18

CDQ-SVX01A-EN 5
General
Information
Operating
Environment
When considering the placement of
the air handlers, it is important to
consider the operating environment.
Theacceptable ambient temperature
range for unit operation is -40ºF to
140ºF (-40ºC to 60ºC).
For heating applications, a special
motor may be required to withstand
the higher temperatures. Motors
with Class B insulation are
acceptable for ambient
temperatures up to 104º F, while
motors with Class F insulation can
withstand ambient temperatures to
+140º F (60º C).
Controls
Wiring Sizes and
Connections
There are no penetrations into a
Climate Changer™ air handler for
any field-provided wiring or device.
Before installation, consider overall
unit serviceability and accessibility
before mounting, running wires
(power), making cabinet
penetrations, or mounting any
components to the module cabinet.
Wiring to air handlers must be
provided by the installer and must
comply with all national and local
electrical codes. The fan motor
nameplate includes a wiring
diagram. If there are any questions
concerning the wiring of the motor,
be sure to write down the
information from the motor
nameplate and contact your local
fan motor manufacturer
representative for assistance.
Factory-Mounted Controls
Small items that cannot be factory
mounted will ship inside the control
enclosures. Larger items may ship
inside the fan module.
Note: All control valves ship directly
to the “ship-to address” from the
vendor unless another address is
given on the Trane sales order.
All factory-mounted control systems
(controls that are factory-wired to a
unit controller or termination strip)
ordered without starters or variable-
frequency drives (VFDs) are
provided with line to 24 Vac control
transformers mounted and wired in
the auxiliary control panel. The
customer must provide 120 Vac
control power, 50/60 Hz, typically
3 amps for unit sizes 3 to 57 and
5 amps for unit sizes 66 to 120. A
dedicated 15-amp circuit is
recommended.
Factory-mounted control systems
ordered with factory-mounted
starters or VFDs are supplied with
line to 24 Vac control transformers.
No additional power wiring is
required.
For a more in-depth understanding
of controls, refer to the following
manuals:
• For factory-configured AH540/
AH541 controllers,
CNT-SVX05B-EN
• For programmable MP580
controllers, CNT-SVP01A-EN
• For hardware installation,
CNT-SVN01A-EN
• For Danfoss VFD,
TR1-SVX10A-EN
• For universal programmable
control modules (UPCMs):
–EMTX-PG-5
– EMTX-IN-22A

General Information
6CDQ-SVX01A-EN
Ultraviolet (UV)
Germicidal
Irradiation Lights
(optional)
The United States Environmental
Protection Agency (EPA) believes
that molds and bacteria inside
buildings have the potential to cause
health problems in sensitive
individuals. If specified, Trane
provides ultraviolet lights (UV-C) as
a factory-engineered and installed
option in select commercial air
handling products for the purpose of
reducing microbiological growth
(mold and bacteria) within the
equipment. When factory provided,
polymer materials that are
susceptible to deterioration by the
UV-C light will be substituted or
shielded from direct exposure to the
light. In addition, UV-C radiation can
damage human tissue, namely eyes
and skin. To reduce the potential for
inadvertent exposure to the lights by
operating and maintenance
personnel, electrical interlocks that
automatically disconnect power to
the lights are provided at all unit
entry points to equipment where
lights are located.
 WARNING
Equipment Damage From
Ultraviolet (UV) Lights!
Trane does not recommend field
installation of ultraviolet lights in its
air handling equipment for the
intended purpose of improving
indoor air quality. High intensity C-
band ultraviolet light is known to
severely damage polymer (plastic)
materials and poses a personal
safety risk to anyone exposed to the
light without proper personal
protective equipment (could cause
damage to eyes and skin). Polymer
materials commonly found in HVAC
equipment that may be susceptible
include insulation on electrical
wiring, fan belts, thermal insulation,
various fasteners and bushings.
Degradation of these materials can
result in serious damage to the
equipment.
Trane accepts no responsibility for
the performance or operation of our
air handling equipment in which
ultraviolet devices were installed
outside of the Trane factory.

CDQ-SVX01A-EN 7
Operation
WARNING
Rotating Components!
Disconnect all electrical power,
including remote disconnects before
servicing. Follow proper lockout/
tagout procedures to ensure the
power can not be inadvertently
energized. Secure drive sheaves to
ensure rotor cannot freewheel.
Failure to secure drive sheaves or
disconnect power before servicing
could result in death or serious
injury.
CAUTION
Do Not Exceed Maximum
Airflow!
Do not exceed the maximum rated
airflow. Excess pressure could
accelerate wear and cause damage
to the wheel.
CDQ Wheel Startup
1. Set seals. See “Seal Adjustment”
on page 17.
2. With hands and objects away
from moving parts, activate the
wheel and confirm the wheel
rotation. The correct rotation
direction is counter-clockwise as
viewed from the pulley side.
3. Verify rotational speed 8-10
rotations per hour. The wheel
should be a 1/4 turn in 100-150
seconds.
4. If the wheel has difficulty starting,
confirm seals adjustment and belt
tension. See “Seal Adjustment”
on page 17. If belt slips, see
“Drive Belt Adjustment/
Replacement” on page 16.
5. Start and stop the wheel several
times to confirm seal adjustment
and proper belt tracking on the
wheel rim.
WARNING
Hazardous Voltage!
Disconnect all electric power,
including remote disconnects before
servicing. Follow proper lockout/
tagout procedures to ensure the
power can not be inadvertently
energized. Failure to disconnect
power before servicing could result
in death or serious injury.
6. If the wheel has difficulty starting,
turn off the power and inspect for
excessive interference between
the wheel surface and the four
diameter seals. To correct, loosen
the diameter seal adjusting
screws and back the diameter
seals away from the surface of
the wheel. Apply power to
confirm that the wheel rotates
freely. Readjust and tighten the
seals according to instructions in
“Seal Adjustment” on page 17.
7. Damper actuators (if so equipped):
Stroke the actuators to observe
full open and full closure of
dampers. Adjust the actuator and/
or linkage to prevent “over-
stroking” so excessive pressureis
not placed on the damper at the
full open or full closed position.
Note: Do not exceed the maximum
rated airflow for the wheel. The
pressuredropacrossthewheelisnot
to exceed 1.5 inches w.g.

8CDQ-SVX01A-EN
Wiring
CAUTION
Do Not Install VFDs!
Do not install a variable-frequency
drives (VFDs) to control wheel
speed. This may result in failure of
the wheel motor.
CAUTION
Factory-Installed Wiring!
Use caution when penetrating unit
casing. Factory wiring may be routed
in the side panels of the module.
Misplacedpenetrationsmayresultin
damage to the wiring.
CAUTION
Penetration Leaks!
Properly seal all penetrations in unit
casing. Failure to seal penetrations
from inner panel to outer panel may
result in unconditioned air entering
the module, and water infiltrating
the insulation, resulting in
equipment damage.
Figure 1. CDQ wheel modules may have
factory-installed ribbon cables
attached inside. Take care when
penetrating the unit casing. Modules
will be labeled.
CDQ™ Desiccant
Wheel Cassette
Motor Data
If not factory-installed, the electrical
contractor must provide and install a
starter or starting contactor,
disconnect, fuses, etc., as required
by local codes, for the CDQ wheel
motor. Do not install a variable
frequency drive (VFD) to control the
desiccant wheel speed. This may
result in failure of the wheel motor.
Themotorrequiresairmovementfor
continuous operation. Operating the
wheel for long periods with the fan
off may result in motor failure.
Table 1. Motor Data
Wheel Size
(nominal cfm) HP Voltage/ phase HZ Full Load Amps Rotation RPM Rotation Direction
500-5000 1/80 115 Volt
Single Phase 60 0.3 2.30 CW/CCW*
6000-40,000 1/80 115 Volt
Single Phase 60 0.3 4.50 CW/CCW*
*Motors are wired for counter clockwise rotation
Figure 2. Motor wiring
5000C1 wheels and below
<
48in diameter 6000C1 wheels and above
>
54in diameter
Optional Damper Actuators
Each actuator requires 24 Vac supply
power and wiring for the 2–10 Vdc
control signal. This wiring should be
sized and installed as required per
national and local electrical codes.
Optional Air Temperature
Sensors
If not factory-wired, connection to
the air temperature sensors is made
by penetrating through the side of
the module wall and making
electrical connections to the
temperature sensor. Nominal
resistance of these sensors is 1,000
ohms at 32 degrees F (0 degrees C).
The sensor is a thermistor with a
platinum 375 resistance curve. This
wiring should be sized and installed
as required per national and local
electrical codes.

CDQ-SVX01A-EN 9
Routine
Maintenance
WARNING
Hazardous Voltage!
Disconnect all electric power,
including remote disconnects before
servicing. Follow proper lockout/
tagout procedures to ensure the
power can not be inadvertently
energized. Failure to disconnect
power before servicing could result
in death or serious injury.
WARNING!
Protect Eyes!
Always wear proper eye protection
when blowing compressed air or
water. Failure to wear proper
personalprotectionequipment(PPE)
could result in death or serious
injury.
CAUTION
Cleaners, Solvents and
Excess Pressure!
Do not use acid based cleaners,
aromatic solvents, steam, or
temperatures in excess of 170°F to
clean wheel. Do not use air or water
with pressures in excess of 20 PSIG.
Doing so may cause damage to the
wheel!
CAUTION!
Keep Wheel Clean!
Accumulated dirt and debris may
result in reduced airflow and/or
increased pressure drop across the
wheel. Increased pressure drop can
result in permanent damage to the
wheel or module.
Cleaning the
Desiccant Wheel
If routine inspection indicates there
is dirt or dust buildup in the wheel,
clean the wheel using the following
procedure:
Vacuum the wheel
1Using a standard shop vacuum,
vacuum any debris from both
faces of the wheel. Slowly work
around the entire face of the
wheel to complete the
procedure. Do not damage
wheel face by excessive
pressure of the vacuum nozzle
on the wheel face.
2Using 20 psig clean dry air, and a
small air nozzle, blow air through
one face of the wheel. At a
similar location on the opposite
side of the wheel, gently apply a
shop vacuum to “receive” any
remaining debris exiting the
wheel.
In most instances this should
adequately clean the wheel. In the
event the wheel is subject to an
aerosol, smokeorothermaterialthat
coats the wheel, it can be washed
with water and/or a mild detergent.
The desiccant wheel can be washed
thoroughly without affecting the
performanceofthewheel. Thewheel
will simply dry out following a
washing procedure and resume
dehumidification without any
deviation in performance.
If the desiccant wheel can be easily
removed from the cassette or unit, it
isrecommended to doso to facilitate
the washing process. However, in
most cases, it is impractical to
remove larger wheels and therefore,
the washing procedure must take
placewithinthe airhandlingunit and
provisionsneedtobemade tocollect
the runoff water from the bottom of
the unit.
Washing the wheel
1Disconnect all power.
2Shield or remove all electrical
components with plastic
sheeting. Shield the bearing
with plastic sheeting.
Precautions should be taken to
ensure the motor windings and
capacitor do not get wet.
3Ensure that an adequate
drainage system exists to
collect runoff water from the
bottom of the unit.
4Using standard pressure water
(do not use a high pressure
washer) and working from the
lower half of the wheel, wash
the wheel with a standard
“garden” nozzle to flush any
debris trapped within the flutes
of the wheel. Minimize water
contact with the seals. Wash
from one side and vacuum up
water from the other side with a
wet vacuum.
5Once the entire process side is
adequately washed, rotate the
wheel one half turn and wash
the section that was at the top.
6After washing, there will be a
temporary derate in
performance as the wheel dries
out. To expedite the dry out
time, regeneration preheat
should be activated if it was
provided.

Routine Maintenance
10 CDQ-SVX01A-EN
Cleaning the Motor
WARNING
Hazardous Voltage!
Disconnect all electric power,
including remote disconnects before
servicing. Follow proper lockout/
tagout procedures to ensure the
power can not be inadvertently
energized. Failure to disconnect
power before servicing could result
in death or serious injury.
Disconnect all electrical power, then
use a vacuum cleaner and brush to
remove accumulated material from
the CDQ wheel motor. The use of
spray aerosol cleaners is not
recommended. Examine the motor
monthly for debris accumulation.
Cleaning the CDQ
Module
1. Disconnect all electrical power.
2. Use a vacuum cleaner to remove
dust and debris from the module
surfaces.
3. If needed, use a detergent
solution to remove grease, oil, or
other stubborn deposits from
module surfaces. Follow the
manufacturer’s instructions
regarding use of the product.
4. Rinse any cleaning product
thoroughly from the module
walls. The use of a water stream
from a garden hose or high
pressure washer is not
recommended. Saturation of the
wall panel insulation could result
in potential microbial growth.
5. Examine the module monthly for
material build-up on the wall
surfaces.
Bearing and Motor
Lubrication
The wheel gear motor bearings are
pre-lubricated at the manufacturer
and do not require re-lubrication.
Wheels smaller than 8500 cfm,
66- inches in diameter, have a
permanently sealed inboard bearing
and need no maintenance. Larger
wheels come equipped with a
external flanged bearing that should
be greased annually.
Drive Belt Tension
The drive belt is a link stretch belt
designed to provide tension
throughout the life of the belt.
Inspect the belt annually for proper
tracking and tension. A properly
tensioned belt will turn the wheel
immediately, with no visible
slippage, when power is applied. If
belt needs tensioning, see “Drive
Belt Adjustment/Replacement” on
page 16.