Start Up; Control Panel - Ingersoll-Rand D54IN-A Bedienerhandbuch

In order to optimise the use of the dryer, we suggest to place it in such a way that all the control instruments of the
machine will result easily visible.
A suitably sized prefilter must be installed before the dryer. Failure to install and maintain a proper prefilter will
void the dryer warranty. The rating for this filter must be at least 10 micron.
It is necessary for the user to install a protective device (a safety accessory) to protect the equipment under
pressure from the risk of exceeding the maximum allowable pressure (PS); it is necessary to install a protective
device to protect the equipment at high temperature from the risk of exceeding the maximum allowable
temperature.
Ensure that the dryer is by−passed, or there is no load on the cooler.
Switch on the main electrical isolation switch (if present). The control panel will show the message OFF, indicating that the line and
control voltages are available.
Start sequence
The dryer will initially start by pressing and holding the local ON/OFF button. The start sequence will progress only if there are no
active alarms. The compressor motor will start AFTER 120 SECONDS. The fan motor will start simultaneously with the compressor
for D270-660IN-A models.
Mod.D54-180IN-A: the fan motor is controlled only by the fan pressure switch.
Stop sequence
The dryer can be stopped locally from the control panel. After having pressed the ON/OFF switch for 1 second, the compressor and
the fan motor (only the compressor on D54-180IN-A) keep on running for further 10 seconds in order to re-balance the internal
pressures. The dryer can be also stopped due to an alarm or energy saving condition (ESA or ES2). Any alarm will de−energize the
compressor, fan motor can still running (only on D270-660IN-A), it depends on the type of alarm (see Display indications chapter). If the
shutdown is due to an alarm, a message will blink on display indicating the reason for the shutdown. Energy saving condition (ESA or
ES2) occurs when the dew point stands below the set value for a long time in order to save energy and avoid heat exchanger
freezing. This situation can happen when ambient temperature is low and there is no compressed air load.
Mod.D54-180IN-A: the fan motor is controlled only by the fan pressure switch.
Variable speed fan control (Mod. D270–660IN-A)
A patented microprocessor allows to adjust dryer's cooling capacity by changing the fan motor speed. If the dew point is greater than
the set value, the fan speed is increased, if the dew point is smaller than the set value, the fan velocity is decreased. The range can
be from 0 to 100% and the higher is the fan speed, the faster the fan LED blinks, you can read the exact value by pressing the UP
button. If the velocity is 100% you will read FL (Full Load). Under load standard condition the fan speed is usually at 100%, if there is
no load the fan velocity can oscillate between 0 and 20%.
In models D270-660IN-A, in order to adjust the greater dryer's cooling capacity, a hot gas by-pass valve cooperates with the variable
speed system.

3.1 CONTROL PANEL

The dryers are provided with an electronic control system. All adjustments and resets can be performed by means of the
digital panel located on the front of the dryer.
The control panel is composed of 5 keys (ON/OFF, TEST, SET, DOWN and UP) and a 3 digit display, with three signalling
LEDs indicated by icons (PIC 1)
Cod. 710.0150.40.00 Rev03 – 07.2019

3. START UP

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