Connection Of The Air Ducts; Connection Of The Condensation Drain - Zehnder ComfoAir 550 Installationsanleitung

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 ex-
•
haust 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 ei-
ther the summer or the winter, we recommend
fi tting 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 180
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 fl exible channels only Zehnder
channel systems may be used. Any other fl ex-
ible channel will disturb the basic operating
principle of the balanced ventilation system.
• We recommend that the ventilation system is
fi tted with intake and exhaust valves made by
Zehnder.
Return air
Supply air
Outside air
Exhaust air
ComfoAir - Right
EN - 8
Exhaust air
Outside air
ComfoAir - Left
Supply air
Return air

2.6.3 Connection of the condensation drain

ComfoAir - Right
Standard heat exchanger
Warm exhaust air is cooled by the outside air in the
heat exchanger. This causes the moisture in the in-
door 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 underne-
ath the ComfoAir.
• Connect the condensation drain, via a pipe or
hose, to the water seal (siphon) of the domes-
tic 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.
Enthalpy exchanger
When the ComfoAir is fi tted with an enthalpy
exchanger the humidity from the extracted air is
partly transferred to the fresh supply air. In this
case you delay the process of drying out the house
in dry winter months, additionally there is no con-
densate that must be drained from the ComfoAir.
Therefore a condensation drain is not necessary
with an enthalpy exchanger.
Ensure that the condensation drain is
sealed. This prevents the ComfoAir from
sucking in any leakage air.
The condensation drain can be sealed with a stan-
dard screw-cap.
ComfoAir - Left