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Accessories
Electrical pre-heating element for frost protection of the unit
CO
2
-sensor
EM-box
Safety group
Safety group with scalding protection
If your ventilation unit is not a Polar version with an integral pre-heating element, we recommend that you
purchase an external pre-heating element as frost protection of the ventilation unit.
During prolonged periods of frost, the high efficiency counterflow heat exchanger will ice up. To prevent ice
formation, we recommend that you install an electrical pre-heating element.
The pre-heating element consumes limited energy and it ensures efficient heat recovery without periods of
defrosting the counterflow heat exchanger. You thereby achieve an overall reduction in energy
consumption.
If you want to adjust the fan speed level according to use of the dwelling/building (amount of people), you
can retrofit a CO
2
-sensor.
You select the CO
2
-level you want via the control panel. If this level is exceeded, ventilation will increase.
If you want to run the cooker hood via the ventilation unit, in some cases there may be insufficient air for
cooker hood extraction.
If you install an EM-box, you can regulate the extracted air when the cooker hood is in operation, so that less
air is drawn from, for instance, the bathroom and the utility room. This will allow enough air for the cooker
hood to extract sufficiently.
The EM-box is fitted with a metal filter that cleans the air in the cooker hood of grease particles efficiently. It
thereby protects the ventilation unit.
By law, a safety group must be fitted for the cold water connection to the hot water tank.
Nilan offers a safety valve in brass with the following functions:
• Safety valve
• Check valve
• Stop valve
• Drain tab
The control has a software scald protection that ensures that the water in the hot water tank does not
gets too hot.
If you have a large cooling and / or heating need, it may be necessary to deactivate the software scald
protection. The water in the hot water tank can be up to 90 ° C, which is why you need to install a safety group
with scald protection.
If a solar panel is used to heat the domestic hot water via the supplementary coil in the hot water tank, a
safety group with scald protection must be fitted.
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