Zehnder Rittling ComfoAir 350, Instruction Manual

Page: 7 / 40

2 For the user
This chapter describes how to operate the ComfoAir.
For the user 3
2
2.1 Glossary
The ComfoAir features:
• Balanced
ventilation;
• Heat recovery;
• Bypass for free cooling;
• Frost protection;
• Chimney sweep programme;
• Reheater (optional);
A concise explanation of these concepts/features is
given in the paragraphs below.
2.1.1 Balanced ventilation
The ComfoAir is a balanced ventilation system.
Balanced ventilation means that pollutants from
the kitchen, the bathroom, the toilet(s) and possi-
bly the storage room are extracted, while the same
amount of fresh air is blown into the living room and
bedrooms. Gaps under the doors ensure a good
through-fl ow in the dwelling. The air circulation is
in balance.
Ensure that these gaps are never obstructed
by draught excluders or deep-pile carpet, for
example. Otherwise the system will not func-
tion optimally.
A balanced ventilation system consists of:
• ComfoAir
(A);
• Duct system for the supply of outdoor air (B)
and the exhaust of indoor air (C);
• Supply valves in the living room and bedrooms
(D);
• Exhaust valves in the kitchen, bathroom, the
toilet and (if present) the storage room (E).
B
A
C
E
D
F
D
D
D
E
E
2.1.2 Heat recovery
Besides ensuring a healthy balance between in-
coming and outgoing air, the ComfoAir also pro-
vides the benefi ts of heat recovery. Heat recovery
means that heat from the extracted air is transferred
to the fresh, and usually colder, air from outside the
building.
2.1.3 Bypass for free cooling
The bypass is often used during hot days in the
summer season. By allowing colder outside air in
at night, the indoor temperature of the dwelling can
be kept low during hot days. The bypass works au-
tomatically. All you have to do is set the required
comfort temperature.
2.1.4 Frost protection
The ComfoAir is also fi tted with a frost protection
device. This is an automatic protective system that
temporarily reduces (or even briefl y stops) the sup-
ply of outdoor air to the ComfoAir if there is a risk
of freezing in the ComfoAir. This can occur in the
event of moderate to sharp frost during the winter
months.
2.1.5 Chimney sweep programme
The ComfoAir is fi tted with an Chimney sweep pro-
gramme. The Chimney sweep programme is used in
houses that have a fi replace, as there is a risk of air
being sucked back from the chimney. The Chimney
sweep programme works automatically but requires
activation by the installer. While the Chimney sweep
programme is activated the supply and exhaust fan
can not be turned off manually.