RXB PLUS ROTARY SCREW COMPRESSOR UNITS
OPERATION
070.101-IOM (JAN 13)
Page 23
TEMPERATURE-PRESSURE CONTROL
PROGRAM (OPTION) (continued)
PRESS SETPOINT -
The.capacity-control.setpoint.is.used.
when.in.the.Setback.mode.and.Pressure.is.selected.as.the.
capacity.control.desired.
TEMP SETPOINT -
The. capacity-control. setpoint. is. used.
when.in.the.Setback.mode.and.Temperature.is.selected.as.
the.capacity.control.desired.
NOTE: To change the Setback setpoints, refer to “TO
CHANGE THE ADJUSTABLE SETPOINTS”.
ANALOG OFFSET DISPLAY*
..ANALOG.OFFSET:............................
. .
Suc. Disch. Oil. Sep. Filt. Spare. Econ..
. Temp. +0.
+0.
0.
+0.
.
+0.0.......
. Pres. -1.0.
+0. +0.
.
+0.
.
-3...
The.Analog.Offset.Display.is.accessed.by.pressing.
[+/-]
key..
All.analog.values.can.be..or.-.3.to.10.units.depend-
ing.on.which.value.is.being.adjusted..Use.the.
[STEP]
.key.
to.step.to.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.“Filt”.and.
“Econ”.and.channels.are.displayed.but.do.not.pertain.to.the.
standard.program.
AUTO CYCLE PRESS CONTROL DISPLAY *
. AUTO.CYCLE.
Start[40.0.g.]. Timer[01.min]..
. C.C.Press.
Stop.[25.0.g.]. Timer[01.min]..
. =[35.5.g.].
Min.SV-[50%]. Active-[No.]...
. .
*.for.Temp.Menu,.F1.to.Exit
The. Auto. Cycle. Pressure. Control. Display. is. accessed. by.
pressing.the
[F4]
.key.
The.Auto.Cycle.display.provides.for.independently.adjus.table.
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..The.compressor.can.be.started.
and.stopped.by.the.following.pressure.setpoints.even.if.the.
capacity.control.is.selected.to.temperature.
START -
The.suction.pressure.must.be.greater.than.or.equal.
to. the.“START”. setpoint. in. order. to. start. the. compressor..
This.setpoint.works.in.conjunction.with.the.“TIMER”.setpoint.
located.to.the.right.of.it.on.the.display.
(Start) TIMER -
This.is.a.time.delay.used.to.start.the.compres-
sor..The.timer.only.accumulates.time.whenever.the.pressure.
rises.to.or.above.the.“START”.setpoint.and.will.reset.if.the.
pressure.drops.below.the.“START”.setpoint.
STOP -
The.suction.pressure.must.be.less.than.or.equal.to.
the.displayed.“STOP”.setpoint.limit.in.order.to.stop.the.com-
pressor..This.setpoint.works.in.conjunction.with.the.“TIMER”.
setpoint.located.to.the.right.of.it.on.the.display..
NOTE: This
limit must be set higher than Low Suction Pressure Cut-
out and the Low Suction Pressure Alarm setpoints.
(Stop) TIMER -
The.(stop).TIMER.is.a.time.delay.used.to.stop.
the.compressor..The.timer.only.accumulates.time.whenever.
the.pressure.drops.to.or.below.the.“STOP”setpoint.and.will.
reset.if.the.pressure.rises.above.the.“STOP”.setpoint.
MIN SV -
.Minimum.Slide.Valve.Posi.tion,.shown.as.a.percent-
age,.will.limit.the.slide.valve.position.to.the.displayed.setpoint.
ACTIVE -
. Indicates. whether. Auto. Cycle. is. active. or. not..
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.
AUTO CYCLE TEMP CONTROL DISPLAY *
. AUTO.CYCLE.
Start[+50.0.F]. Timer[01.min]..
. C.C..Temp.
Stop.[=20.0.F]. Timer[01.min]..
. =[+44.3.F].
Min.SV-[50%]. Active-[Yes]...
. .
*.for.Press.Menu,.F1.to.Exit
The.Auto.Cycle.Temperature.Control.Display.is.accessed.by.
pressing
[F4]
and.then.the.
[ * ]
keys..
The.Auto.Cycle.display.provides.for.independently.adjustable.
setpoints.to.turn.the.compressor.on.and.off.in.response.to.
the.suction.temperature.or.as.an.adjustable.setpoint.to.limit.
the.minimum.slide.valve.position..The.compressor.can.be.
started.and.stopped.by.the.following.temperature.setpoints,.
even.if.the.capacity.control.is.selected.to.pressure.
START -
The.CC.(capacity.control).Temperature.must.be.
greater.than.or.equal.to.the.“START”.setpoint.in.order.to.start.
the.compressor..This.setpoint.works.in.conjunction.with.the.
“TIMER”.setpoint.located.to.the.right.of.it.on.the.display.
(Start) TIMER -
This.is.a.time.delay.used.to.start.the.com-
pressor..The.timer.only.accumulates.time.whenever.the.CC.
Temperature. rises. to. or. above. the.“START”. setpoint. and.
will.reset.if.the.CC.Temperature.drops.below.the.“START”.
setpoint.
STOP -
The.CC.Temperature.must.be.less.than.or.equal.to.
the.“STOP”.setpoint.in.order.to.stop.the.compressor..This.
setpoint. works. in. conjunction. with. the. “TIMER”. setpoint.
located.to.the.right.of.it.on.the.display..
(Stop) TIMER -
.The.(stop).TIMER.is.a.time.delay.used.to.stop.
the.compressor..The.timer.only.accumulates.time.whenever.
the.CC.Temperature.drops.to.or.below.the.“STOP”.setpoint.
and.will.reset.if.the.CC.Temperature.rises.above.the.“STOP”.
setpoint.
MIN SV -
Minimum.Slide.Valve.Posi.tion,.shown.as.a.per-
centage,.will.limit.the.slide.valve.position.to.the.displayed.
setpoint.
ACTIVE -
.It.indicates.whether.Auto.Cycle.is.active.or.not..
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.
TELECOMMUNICATIONS COMMANDS
ADDED OR CHANGED:
Command:
#01DS.will.send.the.Adjustable.Setpoints.pages.1.and.2.
#01D3.will.send.the.Adjustable.Setpoint.page.3.
#01DC.will.send.both.Auto.Cycle.Displays.
#01D+.will.send.the.Analog.Offset.Display.
*Display.for.illustrative.purposes.only.