Emerson Liebert DS User Manual

Service Menu Parameters
67
Figure 49 Standby settings / lead-lag parameters screen
Number of Standby Units—This parameter selects the number of units that will be in Standby
mode. When a unit is in standby mode the fan will be off and no cooling will be provided.
Rotation Frequency—This parameter controls when a rotation will occur between the standby
units and the operating units within a network.
Rotate at (hour)—This parameter sets the hour of the rotation
Rotate at (minute)—This parameter sets the minute of the rotation
Rotate by—This parameter determines the number of positions to rotate by. Example: If there are 6
units in a unit to unit network and units 1, 3 & 5 are in standby and this parameter is set to “1” then
at the next rotation units 2, 4,& 6 will be placed into standby and 1, 3 & 5 will become operational.
Cascade Units—This parameter when set allows units to activate from Standby mode if the room
temperature is unable to be maintained by the non-standby units. If yes is selected then the cascade
units can perform all functions when activated from standby. This parameter can also be set for Cool-
ing Only or Cool / Heat only.
Start all Standby Units by HT—This parameter activates all units to cool when a High Tempera-
ture alarm occurs.
See 3.9.1 - Calculation of Next Maintenance and Diagnostics for details on these menus.
STANDBY SETTINGS / LEAD-LAG
to change parameter
to confirm
to select parameter
for next/previous unit
then
SYSTEM
PASSWORD (Actual Level 0) ????
Number of Standby Units 0
Rotation Frequency No
Rotate at (hour) 00
Rotate at (minute) 00
Rotate by 1
Perform one Rotation No
Cascade Units No
Start all Standby Units by HT No
S501
S502
S503
S504
S505
S506
S507
S508
S509
S510
S511

Emerson Liebert DS Specifications

General

Brand	Emerson
Model	Liebert DS
Category	Control Unit
Language	English