Exhaust Gas Evacuation Ducts; Exceptions - Miele PRI318 G Installations Plan

Exhaust gas evacuation ducts

The gas-heated flatwork ironers are type B
safeguarding equipment, and with a fan behind the heater.
- The mixtures of exhaust gas and air that are emitted by gas-heated flatwork ironers must
be evacuated through a suitable chimney and out into the atmosphere via the roof.
- Exhaust air/gas evacuation ducts must be kept as short as possible and must rise vertic-
ally up to the vent flue.
- Only materials that are resistant to heat and sooting may be used.
- A condensate drain must be placed at the lowest point of the exhaust air/exhaust gas
line. The condensate must be drained via a water collection tray or a floor drain posi-
tioned in an appropriate location. Supports and louvres must not be fitted. The exhaust
air/exhaust gas line must be installed in a way that ensures it is leak-tight.
See the guidelines for approving exhaust gas systems containing low-temperature exhaust
gases (issued by the German Institute for Structural Engineering in Berlin).

Exceptions

1. If it is not possible for evacuation to take place through a single duct and multiple ex-
haust gas/air ducts are in use, appropriate measures must be put in place to ensure
that, when an appliance is being operated, the exhaust gas/air mixture is not able to
enter the room via the exhaust ducts of other appliances. Examples of appropriate
measures include baffles and merged lines with a shape that is favourable for the
flow. It is important to ensure that high pressure cannot arise in the exhaust gas/air
ducts of the appliances that are not in operation. Appliances with a fan may not be
connected to the same vent flue as appliances without a fan.
2. In exceptional cases, the exhaust gas/air mixture may be evacuated through the ex-
terior wall (in accordance with
Section 38, paragraph 4, sentence 3 of Germany's Model Building Code (MBO)).
However, doing so must not give rise to any risks or unreasonable inconvenience.
3. When using a combined line, the exhaust air evacuation ducts of the individual appli-
ances must be directed into the shared line laterally and in a way that is favourable for
the flow. The cross-section of the vent flue must not be smaller than the cross-sec-
tion of the combined line. The combined line must be kept as short as possible and
must rise vertically up to the vent flue. A condensate drain must be placed at the low-
est point. The condensate must be drained as described above.
All exceptional cases, and particularly those where a combined line is being installed, re-
quire special permission from the relevant building regulations inspector supervisor's of-
fice.
gas fuel-burning installations without flow
22
Installation notes
11