8
4.3 Anti-frost protection
The frost protection system ensures that the
secondary side of the heat exchanger (ex-
haust air side) does not freeze up as a result
of an imbalance between supply and exhaust
flow. An optimal control of the volumetric
flows is carried out, dependent on tempera-
ture and pressure loss at the heat exchanger.
4.4 Filter status display
The unit is equipped with a filter status dis-
play that indicates when a filter change is
necessary. You will find more information in
sections 7.2 and 8.1.
5.
Installation
5.1 General
The steps required to install the unit can be
summed up as follows.
1. Setting up the unit.
2. Connecting
the
channels.
3. Connecting the condensation run-off.
4. Electrical
connection:
Connection of the room air control and
the mains power.
The WRG 300 / 400EC must be installed in
line with the following requirements.
●
Quality requirements of ventilation systems
in closed rooms.
●
Quality requirements of balanced ventila-
tion in closed rooms.
●
Volume calculations in line with building
statutes.
●
Regulations for ventilation in closed rooms
and residential buildings.
●
Safety regulations for low-voltage installa-
tions.
●
Regulations for sewage connection in
closed rooms and residential buildings.
●
Additional regulations laid down by local
utility companies.
●
Mounting instructions for the WRG 300 /
400 EC.
