HP_OWER
27
14
OPERATING LIMITS
14.1
EVAPORATOR WATER FLOW RATE
The nominal water flow rate is referred to a ∆T equal to 5°C, between the evaporator’s inlet and outlet temperatures. The allowed
maximum flow rate is corresponding to ∆T=3°C; higher values may cause too high pressure drops. The allowed minimum water
flow rate is corresponding to ∆T=8°C (except for the models HP_OWER 60 for which
a maximum temperature difference of
∆T=
6,25°C is allowed
). Insufficient values may cause too low evaporating temperatures with the intervention of safety devices
which would stop the unit and, in some particular cases, the water can freeze in the evaporator coil causing the refrigeration
circuit to break down.
We enclosed below a most accurate table showing the minimum flow rates that to ensure for the plate heat exchanger for a the
proper operation of unit according to the model (
note:
the water flow switch is used for preventing the freezing sensor from
failure in the case of insufficient water flow but it does not ensure the minimum flow rate required in order the unit can work
properly)
Models
HP_OWER
60
90
120
150
Cooling capacity for reference [kW]
5,37
8,79
12,23
13,95
Minimum water flow rate that to ensure
[m3/h]
0,74
0,94
1,31
1,50
14.2
AMBIENT AIR TEMPERATURE
The units are designed and manufactured to operate, in summer operation, with the condensate control, with outdoor air
temperatures ranging between -10°C and 46°C. While operating as a heat pump, the allowed range of the outdoor temperature
goes from -15°C to 40°C as a function of the water outlet temperature as indicated in the below table.
Operation limits
Water chiller mode
Ambient temperature
Minimum -10°C M46°C
Water outlet temperature
M5°C M25°C
Heat pump mode
Ambient temperature
Minimum -15°C M30°C
Water outlet temperature
M25°C M58°C
Heat pump mode for sanitary hot water
Ambient temperature with maximum water temperature 48°C
Minimum -15°C M40°C
Ambient temperature with maximum water temperature 55°C
Minimum -15°C M35°C
Water outlet temperature
M20°C M58°C
Summary of Contents for HP OWER 120
Page 1: ...User s and Installer s Manual 60 90 120 150 ...
Page 3: ...HP_OWER 3 ...
Page 26: ...HP OWER 26 13 WATER PUMP CURVES 13 1 MODELS HP_OWER 60 90 13 2 MODELS HP_OWER 120 150 ...
Page 29: ...HP_OWER 29 16 DIMENSIONS 16 1 MODELS HP_OWER 60 IN OUT 1 M 16 2 MODELS HP_OWER 90 IN OUT 1 M ...
Page 30: ...HP OWER 30 16 3 MODELS HP_OWER 120 150 IN OUT 1 M ...
Page 31: ...HP_OWER 31 17 WIRING DIAGRAMS 17 1 MODELS HP_OWER 60 90 Temp Sensor Heat Sink ...
Page 32: ...HP OWER 32 17 2 MODEL HP_OWER 120 Temp Sensor Heat Sink ...
Page 35: ......
