RXB PLUS ROTARY SCREW COMPRESSOR UNITS S70-101 IOM
Page 21
OPERATION
The [F2] function key will call up the Security display. The
Security display allows the operator to either enable or dis-
able the microprocessor’s keyboard and, thereby, prevent
unauthorized tampering with the various adjustable setpoints.
When enabled, the microprocessor keyboard is fully opera-
tive and the security lockout is not in effect. When disabled,
the keyboard is rendered partially nonfunctional. All displays
will still be accessible through the keyboard. If any attempt
is made to enter new adjustable setpoints, however, the mi-
croprocessor will default to the Security display.
TO ENABLE THE KEYBOARD, press the [STEP] key so
that the brackets beside Enter Access Code flash; key the
proper five digit access code and press [ENTER]. The
Setpoints Access will toggle from disabled to enabled and
adjustable setpoint entry is now possible.
TO DISABLE THE KEYBOARD, press the [F2] function key
to call up the Security display; press the [STEP] key until
the brackets beside Enter Access Code flash; key the proper
five digit access code and press [ENTER]. Now press the
[STEP] key until the brackets beside Setpoints Access flash;
and press the [CHANGE] key to toggle from enabled to dis-
abled.
TO CHANGE THE ACCESS CODE, press the [F2] function
key to call up the Security display; press the [STEP] key until
the brackets beside Enter Access Code flash; key the proper
five digit access code and press [ENTER]. Now, select the
Enter Access Code a second time by pressing the [STEP]
key until the brackets beside Setpoints Access flash; key in
the new five digit access code and press [ENTER].
NOTE: Power loss will not effect the Security display.
NOTE: IF NO ACCESS CODE WAS ENTERED AND THE
DISABLED COMMAND WAS SELECTED, THE ACCESS
CODE IS [00000].
LOST OR FORGOTTEN ACCESS CODE: Consult Frick
Company for assistance.
SETBACK DISPLAY *
SETBACK DISPLAY Thu 03-01-89 15:33:36
Setback Setpoint-[05.0 g ] Active-[No ]
Mon Start Time-[- -:- -]
F1 To Exit Stop Time-[- -:- -]
The [F3] function key will call up the Setback display. The
Setback feature enables automatic operation at two sepa-
rate suction conditions on a preset time schedule. Having
entered the desired Setback setpoint, enter the start and
stop time or times and select Active: (Yes) or (No).
NOTE: To change the Setback setpoints, refer to “TO
CHANGE THE ADJUSTABLE SETPOINTS”
*Display for illustrative purposes only.
AUTO CYCLE DISPLAY *
AUTO CYCLE Compressor Start - [20.0 g ]
F1 To Exit Compressor Stop -- [18.0 hg]
Suct.Press. Min. Cap. Control -- [050%]
=[03.5 g ] Auto Cycle Active-- [No ]
The Auto Cycle display is accessed by pressing [F4]. The
Auto Cycle display provides for independently adjustable
setpoints to turn the compressor on and off in response to
the suction pressure or as an adjustable setpoint to limit the
minimum slide valve position.
NOTE: To change the Auto Cycle setpoints, refer to “TO
CHANGE THE ADJUSTABLE SETPOINTS”
SUCT.PRESS. - Constantly monitors and displays the suc-
tion pressure in pounds per square inch gauge (g) or inches
of mercury (hg).
COMPRESSOR START - Compressor Start-up will bring
the compressor back on line when the suction pressure rises
to the displayed setpoint.
COMPRESSOR STOP - Compressor Stop will shut down
the unit if the suction pressure drops to or below the dis-
played setpoint limit. NOTE: This limit must be set higher
than Low Suction Pressure Cutout and the Low Suction
Pressure Alarm setpoints.
MIN. CAP. CONTROL - Minimum Capacity Control, shown
as a percentage, will limit the slide valve position to the dis-
played setpoint.
AUTO CYCLE ACTIVE - Indicates whether Auto Cycle is
active (YES) or not active (NO). Press the [CHANGE] key
while at this setpoint to change the status. Upon deactiva-
tion, the compressor will return to the previous mode of
operation.
ANALOG OFFSET DISPLAY*
ANALOG OFFSET:
Suc Disch Oil Sep Filt Spare Econ
Temp +0 +0 +0 +0 +0.0
Pres +0.0 +0 +0 +0 +0
The Analog Offset Display is accessed by pressing [+/-]
key. All analog values can be offset + or - 3 to 9 units de-
pending on which value is being adjusted. Use the [STEP]
key to step through the desired setpoint. Press the
[CHANGE] key to change the value of the offset by 1. The
actual analog value will be displayed on the top line of the
display. The “Econ” and channels 10, 12, and 13 are dis-
played but do not pertain to the program.
To Next Page
Loading...
