Zehnder Rittling ComfoAir 350, Installer Manual

Page: 12 / 36

EN - 12
2.6.2 Connection of the air ducts
The following aspects must be taken into account,
while installing the air ducts:
■
Install the air exhaust duct so it drains in the
direction of the ComfoAir.
■
Insulate the outside air supply and the air exhaust
duct between the roof/wall passage to render the
ComfoAir damp proof. This prevents the formation
of condensation on the outside of the ducts.
■
To prevent unnecessary temperature loss in either
the summer or the winter, we recommend fitting
thermal and damp-proof insulation to the supply
ducts from the ComfoAir up to the supply valves.
■
Install the air ducts with a minimum ø of 150 mm,
as little air resistance as possible and free from
air leakage.
■
Install a silencer of at least 1m straight directly
onto the supply and return airconnections. For
relevant advice, please contact Zehnder.
■
When using flexible channels only Zehnder
channel systems may be used. Any other flexible
channel will disturb the basic operating principle of
the balanced ventilation system.
■
We recommend that the ventilation system is fitted
with intake and exhaust valves made by Zehnder.
Outside air
Exhaust air
Supply air
Return air
ComfoAir 350 - LEFT
Return air
Supply air
Exhaust air
Outside air
ComfoAir 350 - RIGHT
2.6.3 Connection of the condensation
drain
ComfoAir 350 - LEFT
ComfoAir 350 - RIGHT
Standard heat exchanger
Warm exhaust air is cooled by the outside air in the
heat exchanger. This causes the moisture in the
indoor air to condense in the heat exchanger. The
condensation water created in the heat exchanger
is fed to a PVC condensation drain.
The connection for the condensation drain has an
external diameter of 32 mm. It is located underneath
the ComfoAir.
■
Connect the condensation drain, via a pipe or
hose, to the water seal (siphon) of the domestic
waste-water system.
■
Position
the upper edge of the water seal at least
40 mm underneath the condensation drain of the
ComfoAir.
■
Make sure that the outer end of the pipe or tube
exits is at least 60mm below the water level.
Ensure that the water seal connected to the
domestic waste-water system is always full
of water. This prevents the ComfoAir from
sucking in any leakage air.