6 VERTIV™ - Liebert
®
EFC - UM - 10040805MAN_ENG - 30.03.2023
Liebert
®
EFC units are provided for operating within the following
working ranges (the limits concern new units on which correct
installations have already been made):
Exceeding the winter low temperature limits could
stop the compressor(s) by Low Pressure transducer.
Reset to normal operation can only be carried out
manually through the unit control.
This limit is determined by coupled condenser model.
Exceeding this limit (or a lack of maintenance),
the compressor(s) could stop by High Pressure switch.
Reset to normal operation can only be carried out manually.
To ensure correct operation, best performance, and
longest life the units must be connected to remote
condensers approved by Vertiv™.
The warranty clauses are no longer valid if the unit
is connected to an unapproved remote condenser.
From unit to condenser,
max distance
up to 60m
equivalent length
From unit to condenser,
max geodetic height
(1) (2)
from 20m to 3m
Pipe diameter see Tab. 5.1
Oil traps on vertical upward
line of refrigerant gas
every 6m, max
Extra oil charge see Tab. A.3
Condenser design
Additional non return valve
on delivery line, at 2 m
from compressor
recommended
Insulation external
liquid pipe line
allowed
Room air conditions Temperature: from 20°C to 50°C
Storage conditions/ambient
running condition
*with evaporative cooling
working
from: -30°C (*10°C)
to: 50°C
Power supply tolerances V ± 10%, Hz ± 2
The above information is related to remote condenser installation only
Inlet water temperature min. 5°C
Water pressure max. 16 bar
cv
ms
(chilled water circuit)
300 200
accordance with standard ISO 3744, data center side ducted, free
process side discharge), is 85.3 dBA with unit in operation at 100%
of process fan speed and 77.4 dBA with unit in operation at 75% of
process fan speed.
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