Installation and Maintenance Manual

Service and Maintenance
RLC-SVX09H-EN 185
Service Procedures
Cleaning the Condense (RTWD Only)
Condenser tube fouling is suspect when the “approach”
temperature (i.e., the difference between the refrigerant
condensing temperature and the leaving condenser water
temperature) is higher than predicted.
Standard water applications will operate with less than a
10
o
F approach. If the approach exceeds 10
o
F cleaning the
condenser tubes is recommended.
Note: Glycol in the water system may as much as double
the standard approach.
If the annual condenser tube inspection indicates that the
tubes are fouled, 2 cleaning methods can be used to rid the
tubes of contaminants.The methods are:
Mechanical Cleaning Procedure
Mechanical tube cleaning method is used to remove
sludge and loose material from smooth-bore condenser
tubes.
Review mechanical room limitations and determine the
safest method or methods of rigging and lifting the
waterboxes.
1. Waterbox Removal Procedure - Method 1
This selection applies to the units and condenser side
waterboxes shown in Table 126.
2. Select the proper lift connection device from
Table 131.The rated lifting capacity of the selected lift
connection device must meet or exceed the published
weight of the waterbox. Reference
Table 130, p. 188 for
waterbox weights.
3. Ensure the lift connection device has the correct
connection for the waterbox. Example: thread type
(course/fine, English/metric). Bolt diameter (English/
metric).
4. Properly connect the lift connection device to the
waterbox. See
Figure 83, p. 186. Ensure lift connection
device is securely fastened.
NOTICE:
Proper WaterTreatment!
The use of untreated or improperly treated water could
result in scaling, erosion, corrosion, algae or slime. It is
recommended that the services of a qualified water
treatment specialist be engaged to determine what
water treatment, if any, is required. Trane assumes no
responsibility for equipment failures which result from
untreated or improperly treated water, or saline or
brackish water.
WARNING
Heavy Objects!
Each of the individual cables (chains or slings) used to
lift the waterbox must be capable of supporting the
entire weight of the waterbox. The cables (chains or
slings) must be rated for overhead lifting applications
with an acceptable working load limit. Failure to
properly lift waterbox could result in death or serious
injury.
WARNING
Heavy Objects!
The proper use and ratings for eyebolts can be found in
ANSI/ASME standard B18.15. Maximum load rating for
eyebolts are based on a straight vertical lift in a
gradually increasing manner. Angular lifts will
significantly lower maximum loads and should be
avoided whenever possible. Loads should always be
applied to eyebolts in the plane of the eye, not at some
angle to this plane. Failure to properly lift waterbox
could result in death or serious injury.
Table 126. Waterbox Removal Procedure - Method 1
Size Hz Effic
Condenser
Waterbox
80, 90, 100, 110, 120, 130, 140 60 STD
Supply,
Return
80, 90, 100, 110, 120, 130 60 HIGH
Supply,
Return
70, 80, 90, 100, 110, 120, 130, 140, 150 50 STD
Supply,
Return
60, 70, 80, 90, 100, 110, 120 50 HIGH
Supply,
Return
150, 160, 180, 200, 220, 250 60 HIGH Supply
150, 160, 180, 200 60 PREM Supply
130, 140, 160, 180, 200, 220, 250 50 HIGH Supply
160, 180, 200 50 PREM Supply