68
RLC-SVX09Q-EN
Figure 34. Waterbox removal - swing out, install
lifting chain
7. Lift the waterbox away from the shell.
WARNING
Overhead Hazard!
Failure to follow instructions could result in death or
serious injuries.
Never stand below or in close proximity to heavy
objects while they are suspended from, or being lifted
by, a lifting device in case the object drops.
Condenser Tube Cleaning - Mechanical
1. Store waterbox/cover in a safe and secure location and
position.
Important: Do not leave waterbox/cover suspended
from lifting device.
2. Using a round nylon or brass bristled brush (attached to
a rod) loosen the sludge in each of the condenser water
tubes.
3. Thoroughly flush the condenser water tubes with clean
water.
Note: To clean internally enhanced tubes, use a
bidirectional brush or consult a qualified service.
Reassembly
Once service is complete, the waterbox/ cover should be
reinstalled following all previous procedures in reverse.
• Use new o-rings or gaskets on all joints after
thoroughly cleaning each joint. Contact local Trane
parts center for information.
• Torque waterbox/cover bolts.
Note: Torque bolts in a star pattern. See the table
below for torque values.
Table 28. Torque values – ft-lbs (Nm)
Evaporator Condenser
65 (88) 65 (88)
Parts Ordering Information
Table 29. Lifting hardware
Unit Product Part Number
RTWD Safety Hoist Ring
M12x1.75
RNG01886
Obtain the required parts from local Trane Parts Center.
Chemical Cleaning Procedure
Scale deposits are best removed by chemical means.
Consult a qualified water treatment specialist (i.e., one that
knows the local water supply chemical/mineral content) for
a recommended cleaning solution suitable for the job. (A
standard condenser water circuit is composed solely of
copper, cast iron, and steel.) Improper chemical cleaning
can damage tube walls.
All of the materials used in the external circulation system,
the quantity of the solution, the duration of the cleaning
period, and any required safety precautions should be
approved by the company furnishing the materials or
performing the cleaning.
Note: Chemical tube cleaning should always be followed
by mechanical tube cleaning.
Cleaning the Evaporator
Since the evaporator is typically part of a closed circuit, it
does not accumulate appreciable amounts of scale or
sludge. However, if cleaning is deemed necessary, use the
same cleaning methods described for the condenser tubes.
See the table for evaporator waterbox weights.
Maintenance
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