Ingersoll-Rand D1700IN, Руководство оператора

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Non-cycling Refrigerated Dryer 9
MODELS D1700IN, D2040IN, D2720IN, D3400IN, D4080IN
ingersollrandproducts.com
For water cooled models, a high pressure cut out switch
is positioned near the water regulating valve. The switch
is designed to open at 320 psig and close at 270 psig. The
DPC™ controller includes a digital readout for monitoring
the discharge pressure of the refrigerant gas exiting
the compressor. This reading will vary depending upon
condenser type as indicated below:
Air Cooled condensers with ambient temperatures
between 80°F and 100°F, the refrigerant discharge
gauge should read between 230 - 355 psig.
Water cooled condensers utilize a water regulating
valve (Refer to Figure 3). The water regulating
valve comes pre-adjusted from the factory at 260
psig discharge pressure. To compensate for water
temperature variation, it may be necessary to adjust
the water regulating valve to maintain a 260 psig
discharge pressure. Adjustment can be done by
rotating the adjusting screw counterclockwise for an
increase in discharge pressure. For conditions where
low water temperature and/or high water pressure
are expected it is advisable to install a water pressure
regulator ahead of the condenser.
ADJUSTMENT
SCREW
FIgURE 3 - WaTER REgULaTINg VaLVE
7.5.1 BASIC USER INTERFACE
The Microprocessor Control display provides the user with
the operating parameters and their corresponding values.
When power is supplied to the dryer, the Microprocessor
Control will illuminate and default to the “Standby” mode,
displaying the “Press ON” prompt.
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The following illustration summarizes the keypad functions.
BUTTONS
ON
Places the dryer “On Line”;
OFF
Places the dryer “Off Line”; Stops all automatic
functions.
SELECT DISPLaY
Allows the user to cycle through the available
displays. The last display selected will remain
displayed as the default display.
+ / -
Allows user to modify set point values. Set point
values cycle through a fixed range. Also allows
entering negative numbers in FACTORY MODE.
TEST
Allows user to manually activate the drain valve.
RESET
Pressing once clears the local alarm indication and
de-energizes the remote alarm contact. Should the
alarm condition persist, the alarm will return after the
alarm inhibit time has expired.
SET
Permits the adjustment of parameters in TECHNICIAN
and FACTORY MODES. In CUSTOMER MODE, allows
user to back through displays,
ENTER
Used to accept changed parameters and set point
values.
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Restricted Level access for factory use only. Not used
for basic dryer functions. Not to be used by customer
or service technician.
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7.0 PRINCIPLES OF OPERaTION