Washing The Wheel; Cleaning The Module; Cdq Bearing And Motor Lubrication; Cdq Drive Belt Tension - Trane CSAA Installation, Operation And Maintenance Manual

Routine Maintenance
3. Using 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, smoke or
other material that coats the wheel, it can be washed with
water and/or a mild detergent. The desiccant wheel can be
washed thoroughly without affecting the performance of
the wheel. The wheel 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 is recommended to do so to facilitate the
washing process. However, in most cases, it is impractical
to remove larger wheels and therefore, the washing
procedure must take place within the air handling unit and
provisions need to be made to collect the runoff water
from the bottom of the unit.

Washing the Wheel

1. Disconnect all power.
2. Shield 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.
3. Ensure that an adequate drainage system exists to
collect runoff water from the bottom of the unit.
4. Using 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.
5. Once the entire process side is adequately washed,
rotate the wheel one half turn and wash the section that
was at the top.
6. After 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.
Cleaning the Motor
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
148
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 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.
CDQ Bearings/Motor/Belts

CDQ 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.

CDQ 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 "CDQ Drive Belt Adjustment/
Replacement," p. 153.
CDQ Bearing Replacement
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
CDQ Internal Bearing Replacement
Prepare wheel for removal of old bearing and installation
of new bearing.
1. Remove belt from motor and wheel.
CLCH-SVX07K-EN