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Liebert iCOM
®
Control
Liebert
®
CRV
™
72
Figure 60 Setpoints parameters screen - Page 4
MIN at CFC for EC Fan—This parameter can provide an offset to the minimum fan speed at the
minimum call for cooling. When set to 0 / 100 the MIN speed is reached when the call for fan is at 0%;
and the STD speed is reached when the call for fan reaches 100%.
For example, if the minimum is set to 20 and the standard is set to 90, the fan speed MIN is reached
earlier (the fan operates on lower speed compared to the calculated call for fan), and the STD speed is
reached faster when compared to the calculated call for fan.
STD at CFC for EC Fan—This parameter can provide an offset to the minimum fan speed at the
minimum call for cooling. When set to 0 / 100 the MIN speed is reached when the call for fan is at 0%;
and the STD speed is reached when the call for fan reaches 100%.
High Temp Limit Approach—This parameter sets the sensor that controls the fan speed maximum
override. This can be set to Disable, Supply or Return.
High Temp Limit Approach at— This parameter sets the temperature when the units fan speed
can operate above the maximum speed. The maximum override speed during this mode is set in
parameter A157 (Advanced menus).
Ball Valve Setpoint Offset—This parameter adjusts the operating compressor discharge pressure
by changing the targeted range of control. Available only on water-cooled units.
Unit Diary—Large Display Only
Shows all entered program changes and maintenance performed on the unit.
NOTE
The Liebert CRV fans are oversized and can be used to help protect equipment in emergency
situations, such as high temperature and a single fan failure.
Table 26 Unit diary parameters
Function
Range
Imperial (metric)
Large Display Small Display
Page 1 of 1
Text entered with iST
(Liebert iCOM
®
Service Tool)
N/A -
S134
S135
S136
S137
S138
S139
S140
S141
S142
S143
S144
PASSWORD (Actual Level 0) ????
MIN at CFC for EC Fan 0%
STD at CFC for EC Fan 100%
High Temp Limit Approach Supply
High Temp Limit Approach at 2°F
Ball Valve Setpoint Offset 0psig
SETPOINTS (page 4 of 4) UNIT 01
to change parameter
for next/previous unit
to select parameter
to confirm
then