Bypass with a bimetallic thermostat driving the damper and a metal filter is used to prepare the air entering the supply air apparatus. It protects the ventilator against overheating by sucking in additional (cool) ambient air. The non-return valve used cuts off the supply of hot air to the supply air heater when it is not operating. Bimetal by opening the damper directs this air back to the environment. Bypass has a large metal filter with low flow resistance.

Application

• air preparation in DGP systems
• protection of the supply air apparatus against overheating
• air filtration