Vertiv Liebert iCOM DP400/500 Installer/User Manual page 149

Table B.2 Service Menu Setpoints by Line ID (continued)
Line Parameter
Range
ID Name
Allow BMS to
S164 change No Yes
Fanspeed
Velocity Ana
In 1
BMS is
Ana In 2
connected to
Ana In 3
Ana In 4
0-5V
S165
BMS Analog
0-10V
Input Signal
4-20mA
Type
None
BMS Analog
Input current 0 - 100%
value
High Temp Disabled
S166
Limit Approach Supply Return
High Temp
0 °F / +10 °F
S16A Limit Approach
0 K / +5.5 K
at
FC / AirEco
0 = No
S16B Ramp Up w/
1 = Yes
CFC
Fan Back Draft Disabled
S168
Control Enabled
VSD Setpoint
S169 0.1 - 5.1 V
Back Draft
Not Selectable
S171 0.0 - 5.0 V
Zone 1 Low
Not Selectable
0.0 - 5.0 V
Zone 2 Low
S172
Not Selectable
0.0 - 5.0 V
Zone 2 High
Stop BDR when
S173 No Yes
System is OFF
Display Off and
S175 Off BackDraft
BDR
Default
Description
Setting
Yes
Enables or disables BMS fan speed control. When this parameter is disabled, the BMS will not
have write capability to this point.
Velocity
If the BMS is connected to Analog Input (1-4), it is used for manually writing to & controlling
the unit fan speed using a low-voltage control signal. If the BMS is set to 'Velocity' (V3 or V4),
it is used for manually writing to & controlling the unit fan speed via the Velocity protocol.
None
100%
Sets the sensor to be used to increase the fan speed value above the fans peed setpoint STD
Return
to the value set in the Analog Output high limit.
2 °F
Sets the temperature differential below the high supply and high return temperature limit
where the fan speed would increase from fanspeed setpoint STD to fanspeed MAX.
1.1 K
0 (No) Sets the selection to decouple the fan output from the call for cooling.
Enables/disables Fan Back Draft Control. This feature allows EC Fans (only) to operate at very
low speeads to prevent airflow from cycling through the unit due to a high under-floor static
Disabled pressure than above the floor static pressure. VFD' s cannot be used with this feature due to
motor and/or bearing degradation that may occur at the low fan speeds required to support
this feature.
The variable speed device setpoint is set as a voltage reference. The lower the voltage, the
1.5 V slower the fans will spin. This parameter is set based on the application. Higher under-floor
static pressure may require a higher setting to prevent airflow through the unit.
The not selectable zone 1 and 2 are zones that the EC fans cannot operate within due to
3.5 V vibration harmonics that the fans may introduce to the unit. These parameters will be set
from the factory based on model type and should not need adjusted in the field.
0 V
The not selectable zone 1 and 2 are zones that the EC fans cannot operate within due to
vibration harmonics that the fans may introduce to the unit. These parameters will be set
from the factory based on model type and should not need adjusted in the field.
0 V
The above is true when S173 Stop BDR when System is OFF is set to "YES". If set to "NO", the
No
BDR mode will not be interrupted, unless BDR is disabled or the unit is restarted.
When the back draft damper is enabled, different modes can activate this feature. Remote
Off
Off, Display Off, BMS Off, and Local Off can all be set to activate te back draft damper
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