7.0
INSTALLATION
IRN37–160K–OF & IRN50–200H–OF
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23
7.4 WATERCOOLED UNITS
Cooling Water Piping
Water piping to and from the compressor package
must be at least the size of the water connections on
the machine. Refer to the installation drawing section
for this size. Isolation valves with side drains should
be installed on both the inlet and outlet lines. Also a
strainer of 2mm–mesh size should be installed on the
inlet line. Strainers are available from Ingersoll–Rand.
The strainers will connect to the water manifold on all
units, but also requires a pipe nipple. The list below
shows the required parts for each unit.
IRN37–45K–OF & IRN50–60H–OF:
Strainer – CCN 39157433
Nipple – CCN 95946117
IRN55–75K–OF & IRN75–100H–OF:
Strainer – CCN 39116389
Nipple – CCN 95928032
IRN90–160K–OF & IRN125–200H–OF:
Strainer – CCN 39116397
Nipple – CCN 95960662
Note: KW rated units will be supplied with an NPT to
BSPT adaptor
Carefully inspect your water system before installing
the compressor package. Ensure that the piping is free
of scale and deposits that may restrict water flow to the
compressor package.
Proper operation of your compressor requires that the
water flow listed in Section 8.1 be provided at a
maximum supply temperature of 46
_
C (115
_
F).
Water temperature and pressure gauges should be
installed in the water piping for use in any fault finding
of the water system. Water pressure should ideally be
between 3 and 5 bar (43.5 and 72.5 psi) but must not
be above 10 Bar (145 psi)
Water cleanliness is also extremely important. Cleaning
of coolers as a result of fouling is a customer
responsibility. Therefore, it is highly recommended that
proper water quality must meet the requirements listed
in WATER QUALITY RECOMMENDATIONS later in
this section.
Venting
the water system
At the initial installation or for start–up after draining the
water system proceed to vent the system as follows.
1 Locate the water system vent cocks on top of the
intercooler , aftercooler, and oil cooler.
2 Open the water valve(s) allowing water to flow to the
package.
3 Open the vent cocks and allow all air to escape from
the system. When water is observed at the vent cocks,
close them.
The system is now vented.
Draining the water system
Should it become necessary to completely drain the
water system, proceed as follows.
1 Disconnect the inlet and discharge water lines from
the connections located at the rear of the unit.
2 Locate the intercooler, aftercooler, and oil coolers.
Disconnect the water inlet connections to drain each
cooler. Also, drain any piping between the coolers
and the water shut off solenoid valve (it is normally
closed).
