Unical HP OWER 320RK, Руководство пользователя и инсталлятора

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16.1 POWER AND SOUND PRESSURE STANDARD
Modello
Octave band sound power level
Sound
power
level
Lw(A)
[dB(A)]
Sound
pressure
level
at 1m
[dB(A)]
Sound
pressure
level
at 10m
[dB(A)]
63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz
HP_OWER
260RK
53,7 57,7 62,4 62,6 68,9 66,2 62,4 73 57,1 41,5
HP_OWER
320RK
46,6 63,1 66,5 65 67,3 75,9 62 77 61,1 45,5
17. OPERATING LIMITS
17.1 EVAPORATOR WATER FLOW RATE
he nominal water flow rate refers to a 5°C temperature difference between the evaporator inlet and outlet. The maximum permitted flow rate
features a 3°C temperature difference while the minimum one has an 8°C temperature difference at the nominal conditions as shown in the
technical sheet.
Insufficient water flow rates can cause excessively low evaporation temperatures causing the safety devices to trigger and
stopping the unit and, in some extreme cases, forming ice in the evaporator and resulting in serious failures to the cooling
circuit.
For greater details, we have attached a table below with the minimum flow rates for the plate heat exchanger to guarantee proper operation
according to the model (please note: the water flow switch is applied to protect against failed triggering of the antifreeze probe due to the lack
of flow but does not guarantee the minimum water flow rate required for correct operation of the unit).
Model
HP_OWER 260RK HP_OWER 320RK
Minimum water flow to be assured in chiller mode (condition (1) technical sheet) [l/s]
0,558 0,776
Maximum water flow to be assured in chiller mode (condition (1) technical sheet) [l/s]
1,49 2,07
Minimum flow switch water flow rate* [l/s]
0,445 0,528
Maximum flow switch water flow rate* [l/s]
0,477 0,588
* When the flow rate drops below the indicated limit (flow switch minimum water flow rate) the flow switch issues an alarm, which may be reset
only upon reaching the maximum indicated flow rate.
17.2 COLD WATER PRODUCTION (SUMMER MODE)
A minimum temperature of 5°C is allowed at the evaporator outlet for standard units. For BT units (low temperature) minimum temperature is
-8°C. In this case glycol water must be used. A maximum temperature of 22°C can be maintained at the evaporator outlet in steady-state oper-
ation.
17.3 HOT WATER PRODUCTION (SUMMER MODE)
When the system has reached steady state, the water inlet temperature must not drop below 25°C: lower values, not due to transient phases
or reaching steady-state, can cause system failures and could possibly break the compressor. The maximum outlet water temperature must not
exceed 60°C.
There could be failures to the regular operation of the unit or, in more critical cases, the safety devices could be triggered due to temperatures
higher than those indicated, especially if coupled with reduced water flow rates.