Preheater kit Topvex

Topvex pre-heater is an accessory for Systemair Topvex units with a counterflow heat exchanger. The pre-heater is designed to compensate for the lack of reheater capacity during bypass de-icing. The pre-heater is connected to the Access control system and will only be engaged during bypass defrosting mode to secure the supply temperature. Depending on the airflow and heating coil capacity, the set point for the pre-heater can be set and optimised from the Access control. The set point is determined according to the lack of reheater capacity during bypass de-icing. 

The Topvex Pre-heater is a complete kit that contains 1 expansion module, 1 pre-heater, and an outdoor air sensor and instructions for operation. The outdoor air sensor is mounted to the outdoor air duct before the pre-heater. It should be assigned as an outdoor air sensor in Access.