Ingersoll-Rand Nirvana 3250-8000, Operator'S Manual

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Nirvana Cycling Refrigerated Dryer Models 3250-8000
ingersollrandproducts.com
• On the Main Power Enclosure, turn the Compressor Controller
Switch to MANUAL
• On the Main Power Enclosure, turn the Dryer On/Off Switch to
the ON position.
• Supply power to dryer Main Power Enclosure and engage each
individual Module Disconnect Switch for a minimum of (8) hours
prior to dryer startup.
• The Microprocessor Control boards on each Module will indicate
the modules are energized and the crankcase heater delay time
remaining.
A
NOTICE
For water cooled models the water valve must be manually opened to
ensure the condenser is full of water prior to start up.
• Verify Proper Refrigerant Pressure
• Check refrigerant pressure readings on the Microprocessor
Control digital display based on the following general guidelines
(refrigeration pressure will vary with ambient temperature):
Ambient Temperature Approximate Refrigerant Pressure(R-404A)
50°F 105
psig
60°F 125 psig
70°F 150 psig
80°F 175 psig
90°F 205 psig
8.8 INITIAL START-UP
The following instructions describe the procedure for INITIAL START-UP
of the dryer. These steps must be followed the first time the dryer is
started after installation or after a prolonged shut down to insure proper
operation of the refrigeration systems For restarting the dryer after short
term shut down, refer to Section 8.9 GENERAL START-UP.
A
CAUTION
The multiple module dryer is equipped with a crankcase heater delay.
This delay is controlled by the Microprocessor Controllers to protect
the refrigeration systems. When power is applied to the dryer and the
individual disconnect switches are switched to the “ON” position, the
crankcase heaters are energized and the Microprocessor Controller’s
internal timer begins its eight hour countdown. The refrigeration
compressors are prevented from operating during this period. Note
that the position of the Dryer On/Off Switch does not affect Crank Case
Heater operation.
A
CAUTION
The Microprocessor Controllers feature an Anti-Short Cycle (ASC)
Delay. This delay is included to prevent rapid restarting of the
refrigeration compressor. The refrigeration systems will energize only
after the ASC delay count down is completed.
Verify power to the crankcase heaters has been applied for 8 hours
before start up.
Turn the Dryer Operation Switch, located on the Main Power Enclosure,
to the “MANUAL” position and the Dryer On/Off Switch to the “ON”
position.
Power Up of Controls & Operational Check of Each Module
• Depress ON button on the Microprocessor Controller on Module #1.
Provided the glycol temperature is above the Chiller Temperature plus
3°F and after the ASC delay has timed out, the module’s refrigeration
system will energize. Observe operation.
8.0 INSTALLATION AND INITIAL START-UP
• “The suction pressure display will typically pull down between 50
and 70 psig and the suction temperature reading will vary between
20°F and 40°F. These will vary depending on the glycol
temperature when operating.
• While the glycol temperature is above 50°F, the Microprocessor
Control will indicate a high chiller temperature alarm condition.
• Record operational data on the refrigeration system and check
compressor amp draw.
• Once acceptable operation has been observed, and before the
glycol temperature drops more than 5°F, depress the OFF button on
the Microprocessor Controller. The Microprocessor Controller will
revert to it’s standby state.
Repeat the above “Operational Check of Each Module” for the
remaining modules.
8.9 GENERAL START-UP
Once the dryer operation has been verified using the Initial Start-Up
procedure described in Section 8.9, the dryers may be started either
locally or via a remote connection as described below.
8.9.1 GENERAL START-UP - AUTO MODE (LOCAL OPERATION)
This mode permits automatic operation all modules of the
dryer.
Verify power to the crankcase heaters has been applied
for 8 hours before start up.
Following proper crankcase heater time delay:
• Turn the Dryer Operation Switch, located on the Main Power
Enclosure, to the “AUTO” position. The green “Power On”
light will illuminate on the Main Power Enclosure.
• After the ASC delay has timed out and provided the thermal
mass temperature is greater than the Chiller Temperature
plus 3 °F, each of the refrigeration systems will energize.
The suction pressure reading will typically pull down
between 35 and 60 psig.
• After the alarm delay, provided the Chiller Temperature is
greater than the HIGH TEMPERATURE ALARM set point,
the dryer’s modules will go into HIGH TEMPERATURE
ALARM. The LCD panel will indicate the alarm and the red
“Dryer Fault” light on the Main Power Enclosure will
illuminate. The refrigeration system will continue to operate.
Pressing the SELECT
DISPLAY button on each
Microprocessor Control will permit viewing of the available
dryer parameters during this alarm condition. Note that the
alarm condition screen will reappear after approximately 30
seconds until the alarm condition is cleared.
• The CHILLER TEMPERATURE will gradually drop as
indicated on the display. Once the temperature falls below
the HIGH TEMPERATURE ALARM set point, the alarm will
reset and the LCD panel will return to its default display.
Once the HIGH TEMPERATURE ALARM on all modules
has been cleared, the red “Dryer Fault” light located on the
Main Power Enclosure will go out.
• After the refrigeration systems shuts off, air flow may be
introduced to the dryer.
• The refrigeration systems may be shut off by turning the
Compressor Control Switch located on the Main Power
Enclosure to the MANUAL position.