EVHR AC SERIES Units office, store, home etc. the fresh air in the ventilation applications of the environments does not have the heat load coming from the fresh air by providing them to be heated at the temperatures exhausted from the inner environment.
Supply and Exhaust Air Fan (EVHR AC – EVER AC) – AC PLUG FAN
Backward curved plug fans are used in heat and energy recovery units. Fan blades have high aerodynamic efficient backward curved design. Plug fans are used for high efficiency and low sound levels. With AC Fans, maintenance costs are reduced as the fans are directly connected to the motors; the belt and pulley problems are eliminated.
Supply and Exhaust Air Fan (EVHR AC EC – EVER AC EC) – EC PLUG FAN
The fans in heat and energy recovery units are equipped with innovative Electronically Commutated EC motor technology. EC motors have higher efficiency and simple speed control. Fan blades have high aerodynamic efficient backward curved design. EC motors
reduce the energy consumption and increase the energy efficiency of the unit. With EC Fans, maintenance costs are reduced as the fans are directly connected to the motors; the belt and pulley problems are eliminated.
Filter
To increase indoor air quality and to protect the equipments used in unit, ISO Course % 45 class filters (according to ISO 16890 standard) are used for both exhaust and supply air streams.
Casing & Insulation
High corrosion resistive 200 gr/m² galvanize coated steel is used for the casing. Inside of outdoor air stream is insulated with 10 mm, outside of outdoor air stream is insulated with 5 mm; inside of indoor air stream is insulated with 10 mm non-flammable acoustics foam against sound and thermal conduction.
Aluminum Cross-flow Heat Exchanger (EVHR AC)
The aluminum plate heat recovery exchanger consists of flat aluminum plates sewed together on the edge. The sewing progress ensures leakage free design. As the edge dimension increases, the efficiency of the heat exchanger increases and pressure loss across the heat exchanger decreases. Increasing plate distance reduces both efficiency and the pressure drop. EVHR AC units include optimized efficiency, pressure drop and cost effectiveness. In extreme climates, to protect the exchanger from freezing, fresh air electric heaters must be used.
Control System
ENECON control unit is developed for controlling of heat recovery units’ equipments, meeting the demands coming from the customers and is user friendly designed. ENECON is capable of controlling the standard equipments and optional accessories. ENECON Control unit can perform the basic functions. Besides, the control unit can be switched on/off via BMS, gets fault signals and controls all the functions via ModBus. Alternative controllers are listed in “Control System” part.
Compressor and Heat Pump Cycle
High efficiency, fully hermetic compressors are used in the heat/ energy recovery units with heat pump. Externally balanced thermostatic expansion valve is used in the unit. The system safety is ensured with low and high pressure pressurestats. The system can work in heating or cooling mode depending on the season selection on the control panel. The unit has an automatic free-cooling system which enables further savings in order to reduce operating costs.
Evaporator & Condenser
Copper tube – aluminum fin type and high efficiency evaporator and condenser are used. At the entrance of the evaporator, refrigerant distributor is used for a uniform distribution. In order to keep the pressure drops on the air side reduced, the air speed of 2.7 m/sec or a lower value is selected for evaporator and condenser. There is a stainless steel drain pan under the evaporator and condenser.
