C950 PLANNING & INSTALLATION MANUAL
19
TP0029 Rev.5
Ó
2000 Ingersoll-Rand Company
Date of Revision: 15 August, 2000
Air Cooler Vent Lines
Do not connect the vent lines together. When a
closed cooling water system is utilized, casing vents should be piped to the lower pressure
discharge water line to ensure flow through the vent piping.
Condensate Drain Piping
Air entering the first stage of the unit carries with it a certain amount of moisture. The
amount of moisture depends on the temperature and relative humidity. The maximum
moisture content occurs on days of high temperature and high relative humidity.
Moisture is removed from the air as it passes through each stage of compression. As the air
passes through the coolers, water vapor in the air is condensed and collected in the
moisture separator. This condensation is removed by condensate traps to prevent water
carryover into the next stage of compression. Excessive water carryover may create
problems.
Condensate traps with bypass valves for each stage are factory installed (when ordered).
Each condensate trap must be provided with a separate drain. In addition, each trap
discharge should be piped to a drain that will allow a visual check of the individual trap
function
(
s
ee Figure 10)
.
The location and size of the trap discharge connection is listed on the General Arrangement
Drawing. The piping arrangement is shown on the Process and Instrumentation Diagram.
If the unit is unattended or in a location where maintenance is minimal, a high-level
condensate and shut down alarm should be used. If the traps become clogged, water carry-
over in the unit will result.
Figure 9
Visual indicator of water flow through vent lines
Air cooler vents with valves are provided at the
highest point on the air cooler casings. They are
supplied to ensure that the coolers are full of
water when the compressor is operating and no
air pockets form in the coolers. If part of the cooler
is starved for water, overheating may occur
resulting in damage.
The vents should remain open at all times. The
connections must be piped, by the customer, to a
drain or suitably connected to the compressor
water discharge with a sight flow indicator for
each air cooler (s
ee Figure 9).
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90.10_Pre-Installation and Operation Manual
