Installation instructions
Observe the permissible operating conditions in chapter 3.
Install the electric air heater downstream of the fan (viewed in the air direction), otherwise the fan motor will overheat. Observe the air direction arrow on the housing.
- Installation only permitted with terminal box facing upwards or sideways. The terminal box must not face downwards.
- If the inflow velocity falls below 1.5 m/s, the electric air heater switches off automatically (= forced shutdown) to prevent the unit from overheating. The unit goes into fault mode. To avoid this, it is essential to install an LW 9 air flow monitor, which switches off the air heater at flow velocities < 1.5 m/s.
- Lay a section of duct at least 1...1.5 m long between the electric air heater and the fan to ensure optimum air flow (calming section for a perfect air flow).
- Maintain distances: Between electric air heater and duct bend/fan/air filter/shutters min. of 2 times the duct Ø, e.g. ERH 16-2 with min. Ø 320 mm. Too short of a distance can cause an uneven air flow and trigger the thermal cut-off.
- Use non-combustible materials for the insulation.
- Install a type TFE... air filter upstream of the air heater.
- The terminal box must be freely accessible. The rating plate must be clearly legible even after installation and insulation.