Vents VUT R 400 TN EH EC A17, Руководство пользователя

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The unit has the following operating logic:
Warm stale extract air from the room flows to the unit, where it is filtered by the supply filter. Then the air is moved through the rotary heat
exchanger, then through the condenser/evaporator of the heat pump and is exhausted outside with the exhaust fan. Fresh air from outside
flows into the unit, where it is cleaned in the intake filter. Then the air flows through the electric heater, which is used for air preheat in the cold
season. Then the air flows through the rotary heat exchanger to the condenser/evaporator of the heat pump and is moved to the room with
the supply fan.
Heat energy of warm extract air is transferred to clean intake fresh air from outside and warms it up in the rotary heat exchanger. Heat
recovery minimizes thermal energy losses and space heating expenses in cold seasons.
Energy produced by the heat pump intensifies the heat recovery effect. The fresh intake air is heated or cooled by the heat exchanger and
then by the heat pump. When the heat pump and the rotary heat exchanger work simultaneously the energy released to the energy consumed
ratio is 1:8, which means that each kilowatt of electricity generates up to 8 kW of heat output.
The energy is first recovered in the heat exchanger and then the fresh air supplied into the serviced space is additionally heated or cooled
by the heat pump.
Heat pump operation in the Heating mode.
The heat pump operates according to the reverse Carnot cycle. Ensuring the transfer of heat from a low-grade source (exhaust stale air from
the serviced spaces) to the high-grade one (hot supply air downstream of the heat exchanger supplied into the serviced spaces) the heat pump
itself produces no thermal energy. In other words the stale air is removed by the extract fan from the spaces, passes through the filter and the
heat exchanger and is then directed into the heat pump evaporator. While passing through the evaporator the indoor air releases a certain
part of its thermal energy which is transferred by the heat pump to the condenser heat recovery unit built into the supply air section. Fresh air
is delivered by the supply fan, passes the filter and the heat exchanger and is then directed into the heat pump condenser unit. While passing
through the condenser the supply air stream is warmed up by the thermal energy accumulated in the heat pump evaporator.
Heat pump operation in the Cooling mode.
The switching between operation modes (heating/cooling) is ensured by the four-way valve which alters the refrigerant flow therefore
changing the heat exchanger operation mode: the heat-recovery unit in the exhaust section assumes the condenser function whereas the one
in the supply section handles the evaporation. The warm fresh air from outdoors is delivered by the supply fan, passes through the filter, loses
some of its thermal energy in the rotary heat exchanger and then enters the heat pump evaporator where it is finally cooled to the pre-set
temperature. The heat pump then transfers the thermal energy extracted from the supply air during the cooling process to the condenser unit.
The thermal energy accumulated in the condenser is transferred to the environment by means of the exhaust fan air supply.
UNIT DESIGN AND OPERATING LOGIC