POWERCIAT LX ST/HE/XE
EN-
28
6 - APPLICATION DATA
6.1 - Operating range
Operating range - LX ST HE
Inlet air temperature (°C)
Evaporator - water outlet temperature (°C)
55
50
45
40
35
30
25
20
15
10
5
0
-20
-16 -14 -12 -10 -8 -6 -4 -2
0
2
4
6
8 10 12 14 16
-15
-10
-5
Operating range - LX XE
Inlet air temperature (°C)
Evaporator - water outlet temperature (°C)
55
50
45
40
35
30
25
20
15
10
5
0
-16 -14 -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16
-20
-15
-10
-5
Ranges given as a guide using ethylene glycol for an evaporator ∆T = 3K. Refer to the electronic catalogue.
Winter operation option for the ST version (standard for HE and XE versions)
Very low temperature brine, ST-HE (-12°C ethylene glycol / -8°C propylene glycol) / XE (-15°C ethylene glycol / -10°C propylene glycol)
Medium temperature brine, ST-HE (-6°C ethylene glycol / -3°C propylene glycol) / XE (-12°C ethylene glycol / -8°C propylene glycol)
Medium temperature brine, ST-HE (-3°C ethylene glycol / 0°C propylene glycol) / XE (-6°C ethylene glycol / -3°C propylene glycol)
Full load operation
Part load operation
Operating limit for units equipped with the Xtra and super low noise options
Power factor correction option available for an inlet air temperature up to +40°C
For operation in pure water at an inlet air temperature below 0°C, the frost protection option must be provided
Winter operation option
If the outside temperature is below -10 °C and the
unit has been switched off for more than 4 hours,
it is necessary to wait 2 hours after the unit has been
switched on again to allow the frequency converter
to warm up.
Water heat exchanger
Minimum Maximum
Entering temperature at start-up
°C
-
45
(1)
Leaving temperature during operation
°C
3,3
15
Entering/leaving water temperature difference
K
2,8
10
Condenser air temperature
Minimum Maximum
Storage
-20
68
Operation, standard unit
-10
55
(2)
With winter operation option
-20
55
(2)
With low noise level option
-10
52
(2)
Note: If the air temperature is below 0°C, a glycol/water solution or the frost protection
option must be used.
Note: If the leaving water temperature is below 4°C, a glycol/water solution or the
frost protection option must be used.
(1) Based on the installation type and the air temperature
(2) Part load, depended of sizes & leaving water temperature
6.2 -
Minimum chilled water flow
(unit without hydraulic module)
The minimum chilled water flow is shown in the table on the next
page. If the system flow is less than this, the evaporator flow can
be recirculated, as shown in the diagram.
For minimum chilled water flow rate
1
2
1 Evaporator
2 Recirculation
