Trane Optimus RTHD, Installation, Operation And Maintenance Manual

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Maintenance
70 RTHD-SVX01K-EN
6. Disconnect water pipes, if connected.
7. Remove waterbox bolts
8. Lift the waterbox away from the shell.
9. Store waterbox in a safe and secure location and
position.
10. Work a round nylon or brass bristled brush (attached to
a rod) in and out of each of the condenser water tubes
to loosen the sludge.
11. Thoroughly flush the condenser water tubes with clean
water.
Note: To clean internally enhanced tubes, use a bi-
directional brush or consult a qualified service
organization for recommendations.
Reassembly.
Once service is complete the waterbox
should be reinstalled on the shell following all previous
procedures in reverse. Use new o-rings or gaskets on all
joints after thoroughly cleaning each joint.
• Torque waterbox bolt in a star pattern. See Table 21 for
torque values.
Obtain the required parts from your 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.
Figure 39. Waterbox lifting
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.
Table 21. RTHD Torque
Evaporator Condenser
65 ft-lbs (88 Nm) 65 ft-lbs (88 Nm)
Connection Device
Cables, Chains or Slings
Waterbox
Table 22. Waterbox weights
Waterbox Size
(a)
(a) Evaporator size is Digit 14 in the model number. Condenser is Digit 21
in model number.
Number
of
Water
Passes
Weight kg (lbs)
Standard
Grooved Pipe
Waterbox
(b)
(b) Lifting connection size M12x1.75.
Marine Style
Waterbox
(c)
(c) Lifting connection is a lifting lug. Removable cover has a weight of 138
kg (300 lbs). Lifting lug connection is M12x1.75.
Evaporator
G 4 164 (361) NA
G 3 208 (458) NA
F 3 107 (235) NA
F 2 107 (235) NA
D/E 3 91 (201) NA
D/E 2 110 (243) NA
B/C 3 76 (167) NA
B/C 2 91 (201) NA
B/C 2 73 (160) NA
Condenser
G 2 102 (226) 297 (655)
E/F 2 66 (146) 239 (526)
B/D 2 53 (116) 187 (412)
Table 23. Connection devices
Unit Product Part Number
RTHD
Safety Hoist Ring
M12x1.75
RNG01886