Oilon ECO Inverter+ 25, Installation And Commissioning Manual

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6.5 Operating conditions
The unit’s operating condition range is provided in the table and the diagram below.
The unit has been designed for use within the specified conditions. The unit’s
performance cannot be guaranteed outside these recommended conditions.
The heat pump’s automation system keeps the compressor’s rotation speed within
the compressor’s operating envelope. The available operating range depends on the
compressor’s rotation speed as well as the evaporator and condenser temperature. If
the unit’s output temperature e60 °C, the system will limit the compressor’s
speed in steps. At the highest output temperature (+68 °C), compressor speed and
heating capacity are kept at approximately 75% of the unit’s maximum speed and
power.
Minimum value Maximum value ECO I 7–25
absolute recommended absolute recommended
Brine into the evaporator °C –6 –5 25 5
Brine out of the evaporator °C –10 -9 – –
Temperature difference
across the evaporator
circuit
°C 1 – 5 4
Water into the condenser °C 15 20 63 61
Water from the condenser °C 18 25 68 67
Temperature difference
across the condenser
circuit
°C 3 5 20 15
DESIGN FLOW RATE Evaporator Condenser
In °C 0 +30
Out °C –3 +35
Heating capacity at full power kW 18.7 24.4
Specific heat capacity kJ/
(kg K)
4.21 4.18
Density
kg/m
3
968.1 994.9
Flow rate m3/h 5.50 4.23
Flow rate kg/h 5329 4206
Evaporator circuit fluid: mixture of water and ethanol, 28 mass-% ethanol (34 vol-%)
48 (54) M8003 2219EN