Vertiv Liebert HPC-M Serie Manuel De Service page 5

Such limits are considered for new machines or machines
that have been correctly installed and maintained.
A tropicalized version must be ordered for temperatures
indicated in the table "Tab.3--- Operating limit" above
46˚C.
The units are designed to be stored at:
Temperatures: ---10 / +45˚C
S
Humidity: 80% R.H., not condensing
S
2.3.2 --- Water circuit
S Max. water flow allowed: see Tab.3 Operating limits;
higher values may cause erosion and vibrations in the
shell & tube exchangers.
S Min. allowed water flow: compatible with a sufficient
evaporation temperature, to exclude the intervention
of the safety devices (to be evaluated for a thermal dif-
ference not higher than 8
S Temperature range of the water exiting the evapora-
o o
tor: 4 C to 15 C
S Max. temperature of the water entering the unit: 20
higher temperatures are allowed only at the system
start---up and not during the standard operation
S Max. glycol percentage: 50%; 35% with pump assem-
bly installed on the machine
S Min. allowed glycol percentage: depending on the min.
temperature of the outer air expected at the installa-
tion site (see Tab. a)
S Max. pressure of the hydraulic circuit: 6 bar; 3 bar with
the optional Hydraulic Kit (expansion tank + safety
valve)
S Voltage range for the electrical supply: 400 V ±10%;
max. phase difference: 2%
2.3.3 --- Power supply
Electrical panel designed according to CEI EN 60204---1
"Safety of machinery --- Electrical equipment of ma-
chines".
Voltage: in standard operating conditions, from 0.9 to
S
1.1 times the rated voltage.
Frequency: from 0.99 to 1.01 times the rated fre-
S
quency continuously.
Voltage unbalance: must be lower than 2%.
S
The Fig. a shows a calculation example of the voltage un-
balance.
Fig. a --- Worked example of calculating phase to
phase variability
1) The 400 V supply has
the following variability:
RS = 388 V
ST = 401 V
RT = 402 V
2) the average voltage is:
388 + 401 + 402
3
3) The maximum deviation from the average is:
402 --- 397 = 5 V
4) The phase to phase variability is:
5
x 100 = 1.26 (acceptable)
397
2
o
C)
R S T
= 397
2.4 --- Sound pressure levels
Tab.4 --- "Sound pressure levels" shows the noise data for
the units in standard configuration (without pumps), op-
erating continuously and measured according to the ISO
3744 norm, in free field conditions.
The highest noise levels are detected on the coil side.
Note:
Avoid positioning in areas with possible reverberation of
the sound waves, which can adversely effect the noise lev-
els.
2.5 --- Transport
S Handle the unit by lifting it with a crane from above;
S The lifting holes are positioned in the frame's base
(when lifting use spreader bars to protect the side, see
Fig. 3 Transport).
N.B:
Place the lifting tubes in the holes in the base indicated
with "LIFT HERE". Lock the ends of the tubes in position
o with the locking pins and split pins as shown in Fig. 3
C;
Transport.
The capacity of the lifting gear must be adequate to lift the
load in question. Check the weight of the units, the capac-
ity of the lifting gear and ropes and the condition and suit-
ability of the aforementioned equipment.
2.6 --- Foundations
S The unit must be placed on a level surface which will
support its weight.
S If necessary, position the unit on suitable anti---vibra-
tion supports that can be supplied as an option (in rub-
ber or spring---type).
S Attention
Position the anti---vibration supports on the ground,
lower the chiller on them and at the end fix the anti----
vibration supports to the chiller itself.
S Refer to the manual "Installation of the spring anti----
vibration supports" for their correct positioning.
S When positioned, level the chiller and bolt it to the
floor.
Note:
For weight distribution see Fig. 4 Support positions and
loads.
Note:
The weights and their distribution refer to standard units
without options; if the pump assemblies, tanks or other op-
tions are installed on the machine, add the weights of the
installed accessories to those of the standard units (see
Tab.6)
2.7 --- Service area
S In order to allow free air flow and maintenance of the
unit, a minimum area must be left free of obstructions
around the unit (see Fig. 1 Service areas).
S The hot air expelled by the fans must be allowed to rise
unimpeded by obstacles for a minimum height of 2.5m.
S Avoid recirculation of hot air between suction and de-
livery, otherwise the unit performance may be im-
paired or the standard operation can be interrupted.
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