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Verfügbare Sprachen
Verfügbare Sprachen
1.5. USE OF ANTIFREEZE SOLUTIONS
o The use of ethylene glycol is recommended if you do not wish to drain the water from the hydraulic system during the winter stoppage, or if the unit has to
supply chilled water at temperatures lower than 5°C The addition of glycol changes the physical properties of the water and consequently the perfor-
mance of the unit. The proper percentage of glycol to be added to the system can be obtained from the most demanding functioning conditions from
those shown below.
o Table shows the multipliers which allow the changes in performance of the units to be determined in proportion to the required percentage of ethylene
glycol.
o The multipliers refer to the following conditions: condenser inlet water temperature 35°C; chilled water temperature 7°C; temperature differential at evapo-
rator 5°C.
o For different functioning conditions, the same coefficients can be used as their variations are negligible.
o The resistance of the water side heat exchanger (RA accessory), and the electric pump unit (RAE accessory), prevents undesired effects due to freezing
during the operating breaks in winter (provided the unit remains powered).
o Attention: Besides the 20% glycol, the absorption of the pump can increase with respect to the declared value (in versions P1-P2, DP1-DP2).
Design air temperature in °C
% glycol in weight
Freezing temperature
fc G
fc Δpw
fc QF
fc P
fc G
Correction factor of the glycol water flow to the evaporator
fc Δpw Correction factor of the pressure drops in the evaporator
fc QF
Cooling capacity correction factor
fc P
Correction factor for the absorbed electrical current.
1.6. PED CATEGORIES OF PRESSURE COMPONENTS
List of PED critical components (Directive 2014/68/UE):
Component
Compressor
Safety valve
High pressure switch
Liquid receiver
Liquid separator
Finned coil
Plates exchanger
* Category and module given within the specific EC declaration for each unit.
H5xxxxx
51
2
0
-3
10
15
20
-5
-7
-10
1.025
1.039
1.054
1.085
1.128
1.191
0.975
0.967
0.963
0.993
0.991
0.990
EasyPACK ECO - Nias
-6
-10
-15
25
30
35
-13
-16
-20
1.072
1.093
1.116
1.255
1.319
1.383
0.956
0.948
0.944
0.988
0.986
0.983
PED category
III
IV
IV
III
III
Art.4 par 3. / II / III *
III
-20
40
-25
1.140
1.468
0.937
0.981
51
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