The ZD is a power close and spring open damper. It has a 24-volt motor used to control circulating air in HVAC systems and used when a normally-open damper is required. The ZD is typically used with the TrueZONE and other electronic zoning systems.
This easy-to-wire damper includes a 24-volt motor used to control circulating air in HVAC systems. The ZD is a power close and spring open damper used when a normally-open damper is required. It's typically used with TrueZONEand other electronic zoning systems.