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Nirvana Cycling Refrigerated Dryer Models 3250-8000
ingersollrandproducts.com
8.0 INSTALLATION AND INITIAL START-UP
FIGURE 4
TYPICAL PIPING ARRANGEMENT
PRE-FILTER
Drain connections should be piped to an appropriate reservoir or
container. It is recommended that a properly-sized oil / water separator
be installed to comply with EPA regulations for waster water disposal.
When connecting drain valves supplied separately, be sure to use a
single drain for each individual device. It is not recommended that more
than one device be connected to a single valve due to the pressure
differential between the two devices.
8.5 FILTRATION
To protect the air dryer from residual compressor oil and insure
maximum dryer performance, a coalescing pre-filter is recommended.
Filters should be located as close to the dryer as possible and
positioned to allow for ease of access for element replacement. Highly
efficient pre-filters and post-filters sized to your drying application can be
provided by Ingersoll Rand. Contact your local distributor to select the
filter that best suits your filtration requirements. Note that all filters
should be individually supported such that no loads are transmitted to
the dryer inlet and outlet connections.
8.6 ELECTRICAL CONNECTION
Equipment is available in various electrical configurations. All customer
connections can be made at the main electrical box located at the side
of the dryer. All three phase electrical configurations L1, L2 and L3 can
be wired in any configuration and not affect compressor performance.
For all Ingersoll Rand equipment, a suitable fused disconnect switch in
accordance with national and local code requirements is recommended.
See unit specification sheet for voltage requirements and load data.
All Ingersoll Rand Nirvana Cycling Multiple Module dryers are equipped
with module disconnects for safety during maintenance or repair. With
this Multidisconnect feature, each individual module can be isolated
from the power source by using its own dedicated switch.
A
WARNING
Crankcase heaters are disconnected through the disconnect switch.
Note that the position of the Dryer On/Off Switch does not affect Crank
Case Heater operation. Refer to wiring diagram supplied with your
dryer.
A
NOTICE
Never wire directly or connect any additional wires to the compressor
junction box. This will cause severe system malfunction.
8.7 PRE START-UP AND SYSTEM LEAK CHECK
Once dryer has been installed and prior to initial start-up, all dryer
systems should be checked for proper installation and leaks. Be sure to
check, as a minimum, the following:
• Verify that all air system distribution piping is reasonably leak free.
Note that due to site conditions, it may not be practical to make the
air system completely leak-free.
• Check air connections on dryer to insure there are no leaks present.
• Check drain lines for air or liquid leaks.
• Check all flange connections, if applicable, for gasket compression.
• For units equipped with water-cooled condensers, check that water
supply lines and dryer water connections are leak free. Be sure to
manually open water regulating valves to fill condensers prior to
starting dryer.
• For all compressors, verify that oil is present in sight glass.
After the checks described above have been performed and prior to the
initial starting of the dryer, perform the following:
• Energize Crankcase Heaters
Ensure that dryer is energized for a minimum of (8) hours prior
to startup.
