RXF PLUS MICROPROCESSOR CONTROL PANELS70-401 IOM
Page 14
ACTIVE WHEN RUNNING
ACTIVE STEPS 1-3
This setpoint allows the operator to select how many steps
of condenser is required to be sequenced by the condenser
control feature.
NOTE: Operator may select more steps that are avail-
able. (Supported by hardware)
3 LEAD LAG OPTION
Before operating the equipment, the operator must review
this entire section. Both hardware and software must be in-
stalled accordingly, to ensure proper operation.
There are 3 primary areas that must be considered:
1. Eprom chips
2. Hardware wiring
3. Master Control Settings
Lead Lag capable chips sets are identified by the LL option
designation. For example, a standard set of lead lag chips
would have the following printed on its label:
ORDER#
RXF-LL (a standard nonlead lag set would show just
RXF)
DATE U4 (U# indicates eprom chip socket location)
or U5
In a group, at least one RXF Plus must have a 3 lead lag set
of eproms installed. Further, the RXF Plus acting as the se-
quence controller must have its communication cabling wired
according to the diagram under section “Wiring Diagrams”.
While it is possible to use lead lag chips on all RXF Plus
compressors, it is best to use standard chips on the OTHER
compressors. Incorporating a complete programmable se-
quencing control program into the RXF Plus chip set neces-
sitated removing features such as Setback and Auto-Cycle.
Using standard chips on the other compressors allows those
compressors to switch to their Auto-Cycle mode of opera-
tion automatically should communications be lost. All lead
lag based control is via the controlling RXF Plus. Consult
Section “Description of Menus and Their Setpoints” for defi-
nitions on the various setpoints regarding lead lag opera-
tion.
Description of Menus and Their Setpoints
The following menus have been added:
NOTE ! The operator may gain access to these menus
by pressing the [CHANGE] key until the desired menu
is reached or by pressing the Function key [F3] and then
pressing the [change] or [ * ] keys to move forward or
backward through the available displays.
LEAD LAG STATUS # 1
IS NOT LL SELECTED
# _ Represents compressor 1, 2, or 3. )
The shaded area may show the following:
OFF IN RMT START ( Off in remote start. )
OFF IN MAN START ( Off in manual start. )
OFF IN A/C START ( Off in Auto-Cycle mode. )
OFF ANTI-RECYCLE ( Off with Recycle delay time
remaining. )
CUTOUT OR FAILED ( Compressor is off due to a
shutdown. )
RUNNING RMT START (Running in remote start.)
RUNNING MAN START (Running in manual start.)
RUNNING A/C START (Running in Auto-Cycle mode.)
NOT COMMUNICATING ( While selected to operate in
LL this compressor is not communicating. )
NOT IN RMT START (Compressor is not available to
start remotely.)
S.V. NOT IN REM. (Compressor Capacity Control is
not in Remote.)
NOT LL SELECTED (Compressor has not been se-
lected to operate in lead lag sequence.)
LEAD LAG CONTROL
MODE = PRESSURE
This menu allows the operator to enable the lead lag con-
trol to operate by either temperature or pressure capacity
control. Selecting DISABLED will turn the lead lag control
feature OFF.
NOTE: Lead lag capacity control uses the pressure and
temperature settings as entered on the controlling RXF
Plus.
Displayable modes (in shaded area of display above) are:
PRESSURE
TEMPERATURE
DISABLED
START 085.3G 060 SEC
STOP 029.9 hg 060 SEC
This menu allows the operator to enter a start and stop PRES-
SURE setpoint with a respective programmable time delay.
START +99.9F 060 SEC
STOP -51.0F 060 SEC
This menu allows the operator to enter a start and stop
TEMPERATURE setpoint with a respective programmable
time delay.
Definition of Start Stop Sec. Terms:
START - The “Comp Start” setpoint is the differential pres-
sure or temperature above setpoint that must be equaled
or exceeded in order to bring another compressor on line.
This setpoint works in conjunction with the “Start Delay”
setpoint.
OPERATION
To Next Page
Loading...
