Liebert HPC-S 006, Продуктовая документация, Страница: 29 / 52

iCOM
Fig. 6
6
Controls
6 -- 1
Liebert HPC---S 006---022---PD---273571---01.03.2012
Controls
Microprocessor Controls
iCOM Control
Liebert HPC---S 006---022 models are controlled by
iCOM Medium (Fig. 6).
iCOM is the standard on---board control and its advanced
features secure system optimisation and energy savings.
Full management of the
Liebert HPC---S 006---022 units
is granted by the on board control iCOM, which allows the
programming of temperature and pressure thresholds as
well as the teamwork functionality through Ethernet net-
work. User set---up can be done with a simple Operating
Display that, through symbols and codes, ensures a reli-
able and flexible man---machine interface.
D
The standard software of the
Liebert HPC---S
006---022
Units includes special control algorithms
that ensure real energy savings and enhance the reli-
ability of the full system.
D
Immediate set---up can be available through the
”Unit Code” system. In case of re---configuration
needs, the full configuration of the unit and recalcula-
tion of all the thresholds levels (which depend on the
refrigerant type) are available by simply enabling the
configuration Unit Code.
D
Sequential auto---restart timer allows phased units
restart after power failure.
D
Pumps’ durability is granted by a special auto---rotation start---up function.
D
The record of the working hours of compressors, pumps and freecooling is easily available via the
CDL iCOM display.
D
Auto---selection of the best control strategy at different ambient temperatures is implemented in or-
der to assure an optimised usage of the compressors and condensers fans.
D
The ”Ambient compensation” function can be enabled to make the unitset---point rise automatically
during warm periods, permitting energy savings.
D
For low noise versions with fan speed control there is a special algorithm which, together with the
compressor management, keeps the fan speed on the lowest possible value.
D
Compressors’ Run/Stop time management is implemented in order to obtain the optimisation of
compressors’ operations either within the unit, or, in case of networking Ethernet, within the whole
of the
Liebert HPC---S 006---022 Units system.
D
A special working mode can be established in combination with Emerson Network Power HPAC
Units to obtain the so called ”Supersaver” system, that enhances the energy saving capabilities.
The information on the cooling needs of the air conditioners is available to the Liebert HPC---S
006---022 units, that will manage its resources (compressors and freecooling) in the most efficient
way in order to save additional energy.
D
When used with Controls electronic expansion valves board, the Liebert HPC---S 006---022
provides the control of the superheat in the evaporator. In order to perform this control task, it re-
quires the suction pressure and the suction gas temperature value. These signals can be received
through two analogue inputs.
D
All settings are protected through a 3---Level Password system.
D
Input for Remote on---off and Volt---free contacts for simple remote monitoring of alarms and warn-
ings are available.
D
Up to 16 Liebert HPC---S 006---022 units can be easily linked together on a network to provide
teamwork mode, stand---by operation and duty cycling without additional hardware. Reliability is
not affected if there are problems on the data communication buses, because the units return auto-
matically to the stand---alone mode.