Electrical connection
Always note the relevant specifications for electrical installations and when fitting equipment. In Germany, observe DIN VDE 0100 and the corresponding parts in particular.
The power supply to the heating elements may only be switched on if the associated fan is switched on beforehand or at the same time. It must only be possible to switch off the power supply to the associated fan if the power supply to the heating elements is switched off beforehand or at the same time.
Damage to the unit in the event of a short circuit due to moisture or incorrect insertion of the cables into the terminal compartment.
Route the cables properly through suitable cable screw connection into the terminal compartment and ensure tension relief. Ensure that the cable screw connection encloses the cables tightly. If necessary, seal on site. Insulate any unnecessary cable cores. Suitable fastening and connection material is to be provided by the customer.
Caution with connected electric air heater
Disconnect all poles of the unit from the power supply before removing the terminal box cover. To do this, switch off the mains fuse in the fuse box and affix a warning sign to prevent unintentional restarting!
- For circuit diagrams, see last page or on the cover inside the terminal box.
- The electrical connection is made to the terminals in the terminal box.
- The degree of protection is only guaranteed if the cables are properly inserted using suitable cable screw connections. To do this, break through the desired holes provided with knockout points. Provide cable screw connections on site.
- Speed control of the fans is permitted in combination with the electronic temperature limiters used (flow velocity must not fall below 1.5 m/s).
- The electric air heater may only be connected with a fixed supply line. The supply line must be equipped with a device for disconnection from the mains with a contact opening of at least 3.5 mm at each pole.
Further information for ERH..R/DRH..R:
- The two setpoint controllers "D" and "E" on the electronic circuit board can be used to set the temperature limits in the ventilation channel:
- MIN limit = 0...30 °C
- MAX limit = 20...50 °C
- The MIN limit can be activated or deactivated with jumper plug "G".
- The MAX limit must always be activated!
- As delivered:
- the MAX limit is active and set to 30 °C.
- the MIN limit is active and set to 15 °C.
- Switch off mains fuse, secure against being accidentally switched back on and position a visible warning sign.
- Attach the cable screw connections correctly to the terminal box and route the cables into the terminal compartment.
- Electrically wire the electric air heater to the terminal block according to the circuit diagram in Circuit diagrams.
- Connect optional accessories Circuit diagrams in Circuit diagrams.
- Check the connection of the PE conductor.
- Attach the terminal compartment cover [3]. Make sure that there are no dirt particles in the terminal compartment and that the cover has close contact all the way around.