Oilon RE 110, Инструкция по установке и эксплуатации

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RE03 1406 EN 7 (48)
The RE heat pump is always connected to separate buffer tank or buffer tanks.
Domestic hot water is warmed up in hot water loops inside buffer tank. Preheating loop
can be located in the middle of the same buffer tank or in another buffer tank. Rest of
the heating is carried out by loop in the upper part of the buffer tank or loop in separate
domestic hot water buffer tank.
For all RE heat pumps desuperheater functionality can be ordered as an option.
The compressors are equipped with liquid injection functionality. In case the
temperature of the refrigerant gets too high in the compressor, low temperature
refrigerant is injected to the compressor. This functionality enables higher temperature
taken out from the heat pump and optimizes the temperature and pressure for the
compressor. This functionality includes an own internal operating control system with
fault diagnostics.
1.7. Coefficient of performance
Heat pump efficiency ratios are compared by their coefficient of performance (COP)
values.
COP indicates the amount of heat energy produced by the heat pump divided by the
energy consumed by the heat pump.
COP depends largely on heat source and heating network temperatures. The highest
possible heat source temperature and the lowest possible supply water temperature
improve efficiency ratio.
1.8. Ground source heat pump sizing
Ground source heat pump can be sized to operate at
● partial capacity
● full capacity.
With partial capacity heat pump maximum capacity is sized up to correspond 60 – 80%
of a building’s maximum heating demand. In this case the heat pump produces the
most part of the building’s annual heat energy demand.
With partial capacity, heat pump operating periods are long during heating season.
This reduces the number of compressor stops and start-ups. During hardest freezing
periods at winter additional capacity from heat pump can be obtained with in-built
electric heater or oil boiler.
With full capacity, heat pump is sized up according to a building’s maximum capacity
demand, practically slightly over sized. With full capacity, the use of additional heating
capacity is minimised, thus in electric heaters’ case it is possible to use smaller fuse
size in electrical connection.