Application Data; Operating Range; Minimum Chilled Water Flow (Units Without Hydraulic Module); Maximum Chilled (Units Without Hydraulic Module) - Carrier AquaForce 30XBE 250 Installation, Operation And Maintenance Instructions

6 - APPLICATION DATA

6.1 - Operating range

Evaporator Leaving Water Temperature (°C)
NOTE
Ranges given as a guide using ethylene glycol for an evaporator ΔT = 3K. Refer
to the electronic catalogue.
Winter operation option (included in standard for 30XBE & 30XBP ranges)
Low temperature brine, (-15°C ethylene glycol / -10°C propylene glycol)
Medium temperature brine, (-12°C ethylene glycol / -8°C propylene glycol)
Light temperature brine, (-3°C ethylene glycol / 0°C propylene glycol)
Full load - 30XB- range
Full load - 30XBE/P ranges
Full load - OPT 15LS(+)
Part load
Power factor correction option (option/QM 231) available for an inlet air
temperature up to +45°C
For operation in pure water at an inlet air temperature below 0°C, the frost
protection (option_41A or 41B) must be provided
ATTENTION: Option 28 (Winter operation)
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
Entering temperature at start-up
Leaving temperature during operation
Entering/leaving water temperature
difference
Condenser air temperature
Storage
Operation, standard unit
With winter operation option (option 28)
With Low noise option (option 15LS)
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
Minimum Maximum
°C - 45
(1)
°C 3,3 15
K 2,8 10
Minimum Maximum
-20 68
-10 55
(2)
-20 55
(2)
-10 52
(2)
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
preent 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 Evaporator
2 Recirculation
6.3 - Maximum chilled (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 Evaporator
2 Bypass

6.4 - Variable flow evaporator

Variable evaporator flow can be used in standard 30XB(E/P)
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.
1
2
1
2
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