Vertiv Liebert DSE - 3.5 Operating Conditions

For DA080/085 the default PID values must be updated to special PID values when the condenser is
installed at the same level as the evaporator or +10 feet (3m) above the evaporator. The PID control values
(both default and special) are noted Table 3.2 below.
Model #
EEV Settings
Default Values
Special Values
(condenser and evaporator at same level ±10ft[3m])
DA050
E144 = MAN
E160 = 0.6
E161 = 250
E162 = 1.0
DA080/085
Downflow
Models
E144 = MAN E144 = MAN
E160 = 0.7 E160 = 1.5
E161 = 250 E161 = 250
E162 = 4.2 E162 = 2.5
DA080/085
Upflow
Models
E144 = MAN
E160 = 2.5
E161 = 250
E162 = 4.2
DA125/150
DA165
E144 = MAN
E160 = 1.8
E161 = 250
E162 = 2.5
Table 3.2 EEV control values, default and special settings
3.5 Operating Conditions
The Liebert® DSE must be operated in a conditioned space within the operating envelope that ASHRAE
recommends for data centers. Operating the DSE outside of this envelope can decrease equipment
reliability. Refer to ASHRAE’s publication, “Thermal Guidelines for Data Processing Environments.”
3.5.1 Cooling, Dehumidification and Humidification
The ASHRAErecommended maximum for return-air temperature is 105°F (40°C) and maximum dew
point is 59°F (15°C). The recommended minimum return-air temperature setpoint for the DSE is 75°F
(24°C).
Operating outside this envelope can decrease equipment reliability.
NOTE: If running in supply-air control, the minimum supply-air setpoint is 64°F (18°C).
Vertiv | Liebert® DSE™ Installer/User Guide
20