| Electrical Connections | : | 4 in Wire Lead |
| Finish | : | Galvanized |
| Material | : | 24 ga Steel |
| Motor Type | : | Spring Return |
| Series | : | VK Series |
| Shape | : | Round |
| Size | : | 6 in |
| Temperature Rating | : | 0 to 150 deg F Operating/-20 to 175 deg F Storage |
| Timing | : | 30 s Powered/18 s Spring Return |
| Type | : | Direct Drive Make-Up |
| Voltage Rating | : | 24 VAC |
The Zonefirst® make-up air ventilation damper system is designed to provide outdoor make-up air whenever an exhaust fan or ventilation hood is operating to replace the exhausted air by introducing make-up air into the building. The system is a kit consisting of three basic component, the RDSC (normally closed) motorized damper, which open to allow outdoor air into the building, the SPS05 pressure sensor switch to sense when the exhaust fan or hood is operating and a T24 24 VAC transformer to power the damper and pressure sensing switch. When the exhaust fan or hood is on, the pressure sensor switch will sense the increased air pressure and open the RDSC damper. When the exhaust fan or hood is off, the pressure sensor will sense the decrease in air pressure and cut the power to the damper motor. The damper blade will spring closed against the damper internal gasket, ensuring a tight seal.
Zonefirst® Air Ventilation Damper Kit, Direct Drive Make-Up, Series: VK Series, 6 in Size, Round Shape, 24 VAC, 30 s Powered/18 s Spring Return Timing, Spring Return Motor, 4 in Wire Lead Electrical Connections, 0 to 150 deg F Operating/-20 to 175 deg F Storage, 24 ga Steel, Galvanized