Abstract: A rooftop HVAC unit includes a cabinet, an energy recovery wheel, dampers, and a controller. The energy recovery wheel is configured to be mounted within the cabinet. The energy recovery wheel is configured to transfer heat between an outdoor air stream and a return air stream when in an operational mode, and is further configured not to transfer heat between the outdoor air stream and the return air stream when in a bypass mode. The dampers can direct the outdoor air stream and return air stream through the rooftop HVAC unit, either through the energy recovery wheel or around the energy recovery wheel. The controller is configured to adjust the dampers based on a selection between the operational mode and bypass mode of the energy recovery wheel.

Abstract: A rooftop HVAC unit includes a cabinet, an energy recovery wheel, dampers, and a controller. The energy recovery wheel is configured to be mounted within the cabinet. The energy recovery wheel is configured to transfer heat between an outdoor air stream and a return air stream when in an operational mode, and is further configured not to transfer heat between the outdoor air stream and the return air stream when in a bypass mode. The dampers can direct the outdoor air stream and return air stream through the rooftop HVAC unit, either through the energy recovery wheel or around the energy recovery wheel. The controller is configured to adjust the dampers based on a selection between the operational mode and bypass mode of the energy recovery wheel.

Abstract: A lift system includes a trolley member defining an aperture extending through the trolley member, a locking unit coupled to the trolley member, the locking unit including a locking unit body and a pin that extends outward from the locking unit body, where the pin is repositionable between an engaged position, in which the pin extends through and outward from the aperture of the trolley member, and a disengaged position, a cable extending between and terminating at an actuator end that is engaged with the actuator and a subject lift end positioned opposite the actuator end, where the cable is selectively drawn to the trolley member or paid out from the trolley member upon actuation of the actuator, and a subject lift connecting member coupled the subject lift end of the cable.

Abstract: A rooftop air conditioning unit includes a cabinet, an energy recovery wheel rotatably mounted within the cabinet, and a controller. The energy recovery wheel can transfer heat between an outdoor air stream and a return air stream when rotated into an operational position and will not transfer heat when rotated into a bypass position. The controller can select the operational position of the energy recovery wheel and an operational mode of the energy recovery wheel.

Abstract: A lift system includes a trolley member defining an aperture extending through the trolley member, a locking unit coupled to the trolley member, the locking unit including a locking unit body and a pin that extends outward from the locking unit body, where the pin is repositionable between an engaged position, in which the pin extends through and outward from the aperture of the trolley member, and a disengaged position, a cable extending between and terminating at an actuator end that is engaged with the actuator and a subject lift end positioned opposite the actuator end, where the cable is selectively drawn to the trolley member or paid out from the trolley member upon actuation of the actuator, and a subject lift connecting member coupled the subject lift end of the cable.