Start Modes; Manual Mode; Auto Restart Mode; Remote Automatic Mode - Ingersoll Rand Nirvana NVC2000 A400 Manual Del Operador

LOW PRESSURE CUTOUT ALARM (LO PRESS CO)
If the suction pressure of the refrigerant is determined to be below the set
point of the LPCO alarm, the Microprocessor Control alarm routine will
activate. This alarm condition may cause damage to the dryer when
subjected to continuous or long-term exposure. Note that once cleared,
the compressor will restart automatically. However, if two successive low-
pressure conditions are determined, this alarm will shut down the dryer
after a response time delay and will display the alarm condition. The
operator must depress the RESET button in order to reinstate the
compressor.
Parameter
FAN 1 ON
FAN 1 OFF
FAN 2 ON
FAN 2 OFF
HPCO (Air Cooled)
HPCO (Water Cooled)
LPCO
TABLE - 1
7.6.6

START MODES

Ingersoll Rand dryers are capable of starting in one of three
start modes. Note that to protect the refrigeration compressor
from repeated rapid starts, the Microprocessor Control is
equipped with an an anti-short cycle (ASC) delay. The ASC
delay will countdown from the factory set point. Only after the
ASC delay has timed out will the refrigeration system operate.
Below are brief descriptions of these various start modes.
8.1 LOCATION AND MOUNTING
The dryer should not be located in an area where ambient temperature
is likely to exceed 113°F (45°C) or be less than 50°F (10°C). The dryer
must be located in an area that provides sufficient clearance from walls
and other adjoining equipment to allow easy access for servicing and
maintenance requirements. A minimum of 18 inches is required to allow
free flow of air to the condenser inlet.
If loads fluctuate widely, the dryer should be positioned ahead of the
receiver and sufficient storage capacity downstream is necessary to
prevent excessive air flow through the dryer.
When installed after any compressor that causes significant vibration or
air pulsation, such as reciprocating compressors, proper vibration
isolation and pulsation dampening devices should be added to protect
the dryer.
A
NOTICE
Failure to comply to the above instructions may result in equipment
malfunction and will void warranty.
A
NOTICE
Always use a backup wrench when making any threaded connection
to the dryer. Failure to use a backup wrench may result in damaged
tubing and components internal to the cabinet.
7.0 PRINCIPLES OF OPERATION
R-404A
275 psig
195 psig
335 psig
235 psig
450 psig
320 psig
20 psig
8.0 INSTALLATION AND INITIAL START-UP
Nirvana Cycling Refrigerated Dryer Models 2000-2400
ingersollrandproducts.com
7.6.6.1

Manual Mode

Ingersoll Rand dryers are shipped from the factory in the
Manual Mode. After power is supplied to the dryer, the user
will be presented with the ASC delay, followed by the "PRESS
ON BUTTON" display. After the ASC delay has timed out, the
dryer will only start once the ON button is depressed. In this
configuration, to restart the dryer, the user must manually
depress the ON button on the dryer's control panel.
7.6.6.2

Auto Restart Mode

After power is applied to the dryer, and once an anti-short
cycle delay has timed out, the dryer will start automatically. In
addition, this mode of operation allows manual control of the
dryer via the ON & OFF pushbuttons.
applications where automatic restarting of the dryer is desired
after a power failure has occurred.
7.6.6.3

Remote Automatic Mode

This mode of operation allows the user to control the dryer
remotely and requires the installation of a customer-supplied
contact and grounded 24V power supply. With power applied
to the dryer and once the anti-short cycle delay has timed out,
the dryer will start automatically once the switch is closed. In
addition, this mode of operation allows manual control of the
dryer via the ON & OFF pushbuttons.
8.2 PIPING AND VALVES
Install piping, fittings and accessories as required for specific site
conditions and requirements.
arrangement for a refrigerated dryer, including dryer and filter bypasses.
This figure can be used as a guide for valve and accessory placement
in the system.
Ingersoll Rand 2000 through 2400 models come factory installed with a
drain isolation valve (D). The isolation valve permits maintenance of the
automatic drain without isolating air flow to the dryer. To operate dryer,
all valves shown in Figure 3 are to be closed except valves (B), (C) and
(D). Valve (A) is used for bypass purposes and valve (E) is for test and
manual drain purposes.
8.3 FILTRATION
To protect the air dryer from gross contamination associated with
compressor oil and debris and ensure maximum dryer performance, a
pre-filter is recommended. Pre-filters and post-filters sized to your drying
application can be provided by Ingersoll Rand and are available factory
installed. Call your local distributor to select the filter that best suits your
filtration requirements. In addition to air filtration, condensate discharge
oil/water separators are also available to address stringent EPA
regulations.
This is useful for
Figure 3 indicates a typical piping
9