Helios HygroBox KWL Series Installation And Operating Instructions Manual page 51

KWL HB 500 with auxiliary heater battery KWL NHR 500
Auxiliary heater battery KWL NHR 500
Note: Dimensions for warm water and electric heater batteries see Chapter 14 "Dimensions / Design variants".
Attention: The auxiliary heater battery must only be mounted in this position, so that easy access for the potential
replacement of a UVC pipe is ensured for maintenance purposes.
Air inlet
Supply line
Heating
Supply NH-Reg. = Return VH-Reg.
system
Return line
External temperature sensor
An "external temperature sensor" should be installed into the supply line, about 50 cm after the auxiliary heater
battery. In case of low-temperature heating, the HygroBox can also be integrated directly into the heating system without
mixer and external sensors. The supply air temperature is then not actively regulated.
Shut-off valve Expansion tank Mixer Drain valve Autom. vent valve Pump
24