34
CDHH-SVX003C-EN
Figure 23. Flange screw tightening sequence (16 or
20 screws)
16 screws 20 screws
1 5
9
20
2
3
4
6
7
8
10
19
18
17
16
15
14
13
12
11
1
5
9
2
3
4
6
7
8
10
16
15
14
13
12
11
Pressure Testing Waterside
Piping
NOTICE
Equipment Damage!
Failure to follow these instructions could result in
equipment damage.
Do not over pressurize the system or exceed design
pressure. Always perform a hydro pressure test with
water present in piping and waterboxes.
Waterside design pressure is either 150 psig
(1034.2 kPaG) or 300 psig (2068.4 kPaG); refer to unit
nameplate or to submittal documentation.
Eddy Current Testing
Trane recommends conducting an eddy current inspection
of the condenser and evaporator tubes in water-cooled
chillers every three years. Eddy current tests are intended
to identify defects on or within the walls of heat exchanger
tubing that could lead to in-service tube failures. Eddy
current tests conducted before a chiller is put into service
are considered “baseline” eddy current tests, and are
intended to establish a reference point to aid in the
interpretation of future eddy current test reports. Many of
the anomalies that can be found through eddy current
testing have no impact on tube life or performance, while
others are severe enough to justify removing the affected
tube from service. Ask your sales account manager for a
copy of the engineering bulletin (CTV-PRB024*-EN) for
clarification of the role of eddy current testing in chiller
maintenance by providing information about eddy current
technology and heat exchanger tubing.
Installation: Water Piping
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