1. 2. endstream endobj startxref • True economizer mode when outside sensor calls for economizer operation (3 - 12.5 ton packaged units equipped with economizers). If you have any prob-lem or malfunction, refer to this operation … of the enthalpy wheel and opening and closing a set of bypass. Once the fresh air damper and exhaust air damper end switches make the supply and return fans start and run continuously. Tempering incoming air through energy recovery minimizes operating costs by reducing equipment cooling and heating load requirements. These air-to-air Heat Exchangers can recover both sensible (Heat) and latent (Moisture) energy but may use different technologies and offer different efficiencies. operation. Over the last 10 years, there has been a tremendous upsurge of energy recovery ventilators (ERV), dedicated outdoor air dehumidifiers (DOAS) and other HVAC systems units using desiccant-based enthalpy wheels. . h�b```f`` The segments rotate through counter flowing exhaust and outdoor air supply streams where they transfer heat and/or water vapor from the warm, moist air stream to the cooler and/or drier air stream. • Pivoting wheel models used with packaged unit with econo- Other variants include enthalpy wheels and desiccant wheels. U. S. Patent 5,548,970. They reduce energy bills by using the expelled air to heat (or cool) the incoming air, depending on the season. energy wheel is equipped with bypass dampers on the supply and exhaust side with end switch to indicate full open, a variable frequency drive to controll rotation speed, and a rotation dectection module. The majority of our product lines incorporate a variety of advanced energy recovery technologies which are designed for commercial, institutional and industrial applications. Energy recovery wheels rotate between the incoming out- door air stream and the building exhaust air stream. Turn the energy recovery wheel by hand to verify free operation. Unless noted, the information in this manual applies to all available models of Airxchange energy recovery wheels. . Reprinted with permission from Greenheck's Product Application Guide ERA/106-02, "Energy Recovery Wheel Maintenance." ENERGY RECOVERY WHEEL FIGURE 2. Energy recovery systems act upon ventilation air and should be interlocked with supply fan systems. Options featured in this rooftop AC unit include CORE heat exchangers and a rotating energy recovery wheel to capture heat and humidity energy, yielding a 40% increase in system efficiency. Most energy recovery devices transfer heat (sensible) energy only. Energy Recovery Wheel and is being ducted outdoors . Innovent E-Series units recapture energy from air leaving the building and transfer it to fresh incoming air. - The unit is operating in heating mode. The energy recovery wheel wheel should be kept off and the bypass damper opened to maintain the proper mixed air temperature (economizer cycle)until the outside air temperature rises to about 5 degrees above the space temperature. Typical operating conditions encountered in the cooling and heating mode of a total energy recovery unit. energy recovery wheel, the economizer will modulate/ stop the energy wheel to achieve free cooling. Mode of Operation Energy Wheel Exhaust Air Bypass Outside Air Bypass Outside Air Damper Cooling Recovery On Closed Closed Minimum Economizing Off Open Open Minimum–100% Free Heat/Partial Recovery On Modulating Closed Minimum Heating Recovery On … Varipak with Energy Recovery Wheel (VPWA/R) - Sequence of Operation Legend 1. $��D�a�O��K�:��VK�q��}�����>����av#ܰY9��A�4�f�!��o# ��yH���-�fs �qz�_�I��(i@"=4�Ѻh�mw��dh��(i�.HPiv���l[����������0������m���Li����]��6] Ϊ1l��. Unitized Energy Recovery Ventilator 300-6,200 CFM These ERVs work well both in retrofits or new construction rooftop units, fits all major brands of 2-30 ton rooftops and enable plug-and-play installation. Mode when outside sensor calls for economizer operation ( Pivoting wheel models only ) • recovery mode during normal recovery. Operation MANUAL ERV ( energy recovery in both heating and cooling seasons is of! ) energy only ) • recovery mode during normal energy recovery effectiveness and life of the rotates... 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