7.0
INSTALLATION
20
IRN37–160K–CC & IRN50–200H–CC & IRN75–160K–2S & IRN100–200H–2S
7.2 DISCHARGE AND CONDENSATE PIPING
It is essential when installing a new compressor [1], to
review the total air system. This is to ensure a safe and
effective total system. One item which should be
considered is liquid carryover. Installation of air dryers
[3] is always good practice since properly selected and
installed they can reduce any liquid carryover to zero.
A receiver [2] is not usually necessary with variable
speed units such as Nirvana
unless large demand
swings are expected.
Discharge piping should be at least as large as the
discharge connection of the compressor. All piping and
fittings should be suitably rated for the discharge
pressure.
It is good practice to locate an isolation valve close to
the compressor and to install line filters [4].
Include a means [6] to vent the discharge pipework
downstream from the minimum pressure check valve
located on the separator tank. Upstream of the first
system isolation valve [7].
The discharged air contains a very small percentage of
compressor lubricating oil and care should be taken to
ensure that downstream equipment is compatible.
When two rotary units are operated in parallel, provide
an isolation vaIve and drain trap for each compressor
before the common receiver.
The built–in aftercooler reduces the discharge air
temperature below the dew point (for most ambient
conditions), therefore, considerable water vapor is
condensed. To remove this condensation, each
compressor with built–in aftercooler is furnished with a
combination condensate separator/trap.
A dripleg assembly and isolation valve should be
mounted near the compressor discharge. A drain line
should be connected to the condensate drain in the
base.
IMPORTANT: The drain line must slope downward
from the base to work properly. For ease of inspection
of the automatic drain trap operation, the drain piping
should include an open funnel.
NOTICE
For low volume systems that may not include a receiver
[2], compressor response time may need adjusting.
Contact your local IR service agent.
CAUTION
The use of plastic bowls on line filters and other plastic air line components without metal guards can be
hazardous. Their safety can be affected by either synthetic coolants or the additives used in mineral oils.
From a safety standpoint, metal bowls should be used on any pressurized system.
NOTICE
Do not use the compressor to support the discharge pipe.