MAXA bi-32V5C MIDI 0128, Технический бюллетень

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63 125 250 500 1k 2k 4k Tot
Lw(
A) [
dB(
A)]
f [Hz]
0121 0126 0128 0132
9. OPERATING LIMITS
9.1 WATER FLOW RATE AT THE EVAPORATOR
The nominal water flow rate refers to a temperature difference between the inlet and outlet of the evaporator of 5°C. The maximum permissible
flow rate is the one with a temperature difference of 3°C and the minimum is the one with a temperature difference of 8°C at nominal conditions
as indicated in the data sheet.
Insufficient water flow rates can cause too low evaporation temperatures with the intervention of the safety devices and
the stopping of the unit and, in some borderline cases, with the formation of ice in the evaporator and consequent serious
failures of the refrigeration circuit.
For greater precision we enclose a table showing the minimum flow rates to be ensured to the plate heat exchanger in order to guarantee its
correct operation (please note: the water flow switch is used to prevent the anti-freeze probe from tripping due to a lack of flow but does not
guarantee the minimum water flow rate required for correct operation of the unit).
Model i-32V5C Midi 0121 0126 0128 0132
Minimum water flow rate to be guar -
anteed in chiller mode (condition (1)
data sheet) [l/s]
0,618 0,773 0,839 0,950
Maximum guaranteed water flow
rate in chiller mode (condition (1)
data sheet) [l/s]
1,65 2,06 2,24 2,53
Flow switch intervention flow rate -
decreasing flow*. [l/s]
0,445 0,445 0,528 0,528
Flow switch intervention flow rate -
increasing flow*. [l/s]
0,477 0,477 0,588 0,588
* When the flow rate falls below the indicated limit (flow switch intervention flow rate - decreasing flow) the flow switch signals an alarm, which
can only be reset when the flow switch intervention flow rate - increasing flow - is reached.
9.2 CHILLED WATER PRODUCTION (SUMMER OPERATION)
The minimum allowed evaporator outlet temperature is 5°C for units with standard configuration. In the case of units with BT (low temperature)
configuration the limit drops to -8°C. Please note that in this case the use of glycol water is necessary. The maximum temperature that can be
maintained at steady state at the evaporator outlet is 22°C.
9.3 AMBIENT AIR TEMPERATURE AND SUMMARY TABLE
The units are designed and built to operate in summer, with condensation control, with outdoor air temperatures between -15°C and 48°C.
Water chiller mode
Ambient temperature Minimum -15°C Maximum 48°C
Water outlet temperature standard version Minimum 5°C Maximum 22°C
Water outlet temperature LV version Minimum -8°C Maximum 22°C