Ingersoll-Rand R Series, Инструкция по установке, эксплуатации и обслуживанию

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DISPLAYS and ALARMS
1) DEW POINT CONTROLLER AND DISPLAY .
Directly controls dew point and provides constant
digital display of dew point. Factory set at 36ºF.
During ACTUAL display mode, displays the dew
point temperature from 20º to 99º F or -6º to 37º C.
During DP SET mode, the unit displays dew point
set points from 34º to 50ºF in 1º steps, or 1º to
10ºC in 1/2 steps. (Note that the ones digit decimal
point is used to indicate 1/2º when displaying set
point in Celsius scale.) ºC LED- indicates that the
temperature is displayed in Celsius. ºF LED –
indicates that the temperature is displayed in
Fahrenheit. ACTUAL LED – indicates the display
is in ACTUAL mode. Display shows actual
temperature being measured by system. DP SET
LED - Indicates that the display is in programming
mode during which the set point can be changed
and stored. The dew point display also displays
the unit error codes when they occur. (see
Diagnostic codes)
2) ON/OFF BUTTON . LED - Indicates when the unit is
operating.
3) RAISE and LOWER BUTTONS. These are used to
adjust the set point values. The set point will
change once for each time pressed. If the button
is pressed and held, the set point will change one
step per second.
4) SET BUTTON. Toggles between Actual Display
mode and Set point Display mode. During the Set
point Display mode, the Raise and Lower keys are
used to select new set points which are stored in
nonvolatile memory when the mode is set back to
ACTUAL. If no keys are pressed within 15 sec-
onds, the mode is automatically set to “ACTUAL”.
This switch is also used to select the temperature
scale that the unit will operate in. By pressing and
holding for 5 seconds the unit will toggle between
the Fahrenheit and Celsius scale.
5) HIDDEN BUTTON. Positioned in the bottom center
of the Dew Point window between the MODE keys.
When pressed, the display will show the external
suction temperature at the expansion bulb. It has
no further effect on operation. It may also be used
for other diagnostics and factory test purposes
6) POWER SAVER ACTIVE LED . Unit in mode of
minimal power consumption.
7) HIGH DEW POINT ALARM LED . Indicates that the
unit is in the High Dew Point condition. The high
dew point alarm light, with remote dry contacts, will
activate when the actual dew point is 15º F higher
than the dew point set point. Any diagnostic code
will activate the high dew point alarm immediately.
8) DRAIN CONTROL . Will operate by either a ‘LEVEL
FLOAT’ or ‘TIMED’ interval. If the dryer is equipped
with a Level Float (electrical connections to terminal
J9), the drain will respond to the float signal on
demand to operate the drain. The duration that the
drain valve is open, will be the amount of time it
takes for the fluid level to drop and reset the float
signal, plus, a pre-set time of a few seconds
thereafter. The drain valve will also operate auto-
matically once every 30 minutes (independent to the
float signal). The 30 minute timed interval setting
can be adjusted down to 1 minute or raised up to 60
minutes if desired. To adjust the drain ‘Timed
Interval’ setting, press the SET button twice (note
that the Actual and DP Set LED’s will both extin-
guish). The value indicated in the display will be the
Timed Interval setting. Use the UP or DOWN arrow
to the desired timing set point. Pressing the SET
button again will return the display to reading the
dew point and the ‘Actual’ LED will once again
illuminate.
9-10) AIR INLET and AIR OUTLET PSI GAUGES .
Indicates that unit is pressurized. Unit must be
depressurized and bypassed before any service
work is done on air system. Excessive pressure
drop (more than 5 PSIG) across dryer indicates
water may be freezing in the evaporator.
EXTERNAL SENSORS, CONTROLS and RELAYS
DRAIN RELAY (K1) – This onboard relay opens the drain
valve according to drain controls.
SUCTION RELAY (K2) – This onboard relay turns on
according to the mode and dew point conditions and
opens the suction or liquid line valve when active.
UNLOADER RELAY (K3) – not applicable.
COMPRESSOR RELAY (K4) – This onboard relay
controls the compressor according to the mode and dew
point conditions.
HIGH DEW POINT RELAY (K5) – This onboard relay and
LED alarm turns on when the dew point is 15º F above
the set point. This is also active during any error
conditions.
DEW POINT SENSOR (Probe 1) – Resistive NTC sensor
for measuring dew point temperature.
SUCTION TEMPERATURE SENSOR (Probe 2) – Resistive
NTC sensor for measuring external suction temperature
at the expansion bulb (E3 Probe).