66 • MultiFlex CUB-II and CUB-TD I&O Guide
026-1705 Rev 7 06-APR-2010
Setpoints
Press
to move to the Setpoints tab.
1. To set the TD Setpoint, arrow down to
the
TD setpoint
field and enter the
desired number (the default is
15.0
).
TD Setpoint is the setpoint that is
maintained by cycling fans ON and
OFF.
2. To set TD deadband, arrow down to
the
TD deadband
field and enter the
desired number (the default is
1.0
).
TD deadband forms a range of TD
values equally above and below the
setpoint within which the control TD
value is considered to be within lim-
its.
3. To set the DropLeg Maximum, arrow
down to the
Drop Leg Max
field and
enter the desired number (the default
is
100.0
). If the DropLeg Temp rises
above this setpoint, the fans will stage
ON using Condenser Fan On Delay.
4. To set the DropLeg Minimum, arrow
down to the
Drop Leg Min
field and
enter the desired number (the default
is
70.0
).
If the DropLeg Temp falls
below this setpoint, the fans will stage
OFF using Condenser Fan Off Delay.
5. To set the DropLeg Offset, arrow
down to the
Drop Leg Offset
field
and enter the desired number (the de-
fault is
0
). DropLeg Offset is a way of
adding or subtracting an offset to the
drop leg temperature sensor reading
(if needed) in order to tune the indi-
vidual condensing unit.
6. To set the Condenser Fan On Delay,
arrow down to the
Cond Fan On Dly
field and enter the desired number
(the default is
30
). This setpoint de-
fines the amount of time that must
elapse between activation of fan stag-
es. Enter the desired delay in
hours:minutes:seconds (H:MM:SS).
7. To set the Condenser Fan Off Delay,
arrow down to the
Cond Fan Of Dly
field and enter the desired number
(the default is
30
). This setpoint de-
fines the amount of time that must
elapse between deactivation of fan
stages. Enter the desired delay in
hours:minutes:seconds (H:MM:SS).
Alarms
Press
to move to the Alarms tab.
1. To set the high alarm setpoint for drop
leg temperature, arrow down to the
Drop Leg High
field and enter the
Figure A-10 - General Tab in CUB TD Setup
Figure A-11 - Setpoints Tab in CUB TD Setup
