Wrg 180 Ec + Electrical Air Heater - Maico WRG 180 EC Mounting And Operating Instructions

9.4 WRG 180 EC + electrical air heater

If the heat recovery unit is installed in a
passive-energy house, pre-heating of the
outside air is necessary, in order to
guarantee a permanent air exchange.
It warms up cold outside air and keeps the
heat exchanger free of frost.
If the outside air temperature gets too cold,
the external frost protection heating of the
ERH 12-1switches on and guarantees an
uninterrupted ventilation operation.
1 Exhaust air
2 Supply air
3 Outgoing air
4 Outside air
5 Optional
The air flow controller sensor "S1" must be
installed in the direction of flow, at least
30 cm ahead of the electrical air heater.
We recommend the filter box TFE 12-4 (with
G4 filter) to protect the electrical heat register
against dirt.
An earth heat exchanger operating as an air
or brine collector can be used to keep the
heat exchanger free of frost.
For external heat register, filter box,
i
outside air and outgoing air channel:
These must be diffusion-resistant
insulated to protect against
condensation.
S1 Air flow monitor sensor
R1 Temperature sensor
ERH 12-1 Electric air heater (preheating
register)
The minimum distance for S1 and
i
R1 must be maintained
35