32
6 - APPLICATION DATA
6.1 - Operating range
30XBEZE & 30XBPZE
Evaporator Leaving Water Temperature (°C)
Freeze protection needed
Air
inlet
temperature
(°C)
Full load
Part load
Full load - opt 15LS
NOTE
Ranges in brine applications given as a guide using ethylene glycol for an evaporator
ΔT = 3K. Refer to the electronic catalogue.
Low temperature brine, (-12°C ethylene glycol / -10°C propylene glycol)
Medium temperature brine, (-6°C ethylene glycol / 0°C propylene glycol)
Power factor correction option (option/QM 231) available for an inlet air
temperature
up to +45°C (30XBPZE only)
For operation in pure water at an inlet air temperature below 0°C, the frost
protection (option_41A or 41B) must be provided
ATTENTION:
For 30XBEZE range, 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 Maximun
Entering temperature at start-up
°C
-
45
(1)
Leaving temperature during operation
°C
3,3
20
Entering/leaving water temperature
difference
K
2,8
10
Condenser air temperature
Minimum Maximun
Storage
°C
-20
68
Operation, standard unit
°C
-20
55
(2)
With Low noise option (option 15LS)
°C
-20
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 (units without
hydraulic module)
The minimum chilled water flow is shown in the table on the next
page. It is determined in order to allow sufficient exchange and
prevent the risk of excessive fouling. 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
6.3 -
Maximum chilled water flow (units without
hydraulic module)
The maximum chilled water flow is shown in the table on the next
page. If the system flow exceeds the maximum value, it can be
bypassed as shown in the diagram.
For maximum chilled water flow rate
1
2
1 Evaporator
2 Bypass
6.4 -
Variable flow evaporator
Variable evaporator flow can be used in standard 30XB(E/P)ZE
chillers. The chillers maintain a constant leaving water temperature
under all flow conditions. For this to happen, the minimum flow
rate must be higher than the minimum flow given in the table of
permissible flow rates and must not vary by more than 10% per
minute.
If the flow rate changes more rapidly, the system should contain
a minimum of 6.5 litres of water per kW instead of 3.25 l/kW.
