MCZ AirSystem 70 DX - Manual (Page 33)

Chapter 5
INSTALLATION AND USE MANUAL
page
33
Operation Technical service – MCZ S.p.A. all rights reserved - Reproduction prohibited
5.5. LOADING THE FUEL
For normal fuel loading, lift the handle as shown in
figure 27. To close the door, do the opposite.
During use, the metallic structure, the handle and the glass
become very hot. Use the thermal glove provided when
handling these parts.
During normal use, always keep the fire door completely down
and closed. Intermediate positions cause abnormal combustion (forge
effect), rapid wood consumption, and may cause smoke to leak out due
to the high temperature of the fire box.
Open the door only to add fuel, and only for brief periods of
time.
The fireplace stove works best and provides the greatest yield when the
door is closed, because the hermetic combustion chamber and the
calibrated inlet of oxygen allow increased performance.
5.6. CONTROL OF COMBUSTION
PRIMARY AIR
The fireplace stove is equipped with primary air emission from the front
part which ensures combustion and helps keep the glass clean. Moving
the lever to the right provides the full aperture, and more rapid
combustion, while moving it to the left closes the opening, with slower
burning.
SECONDARY AIR
Adjustment is performed using the same lever as for the primary air.
Secondary air comes out in proportion to the primary air. This balance
is pre-calculated; the user cannot change it, as this may cause incorrect
adjustment. This will prevent excessive combustion.
The use of damp or treated wood emits a higher quantity of
smoke than normal that can dirty glass faster. Also the low
performance of the flue pipe can jeopardise glass cleanliness
since smoke remains in the combustion chamber longer than
normal.
5.6.1. Removal of upper deflectors to improve
release of smoke
If your flue pipe is not in the best condition and when you check
combustion you notice that:
• The smoke remains in the smoke mouth for too long
• The flame is very red and feeble
• The glass gets dirty very quickly
• The internal refractory material in Alutec® is very dirty
it probably indicates poor performance of the flue pipe.
Therefore it is necessary to facilitate evacuation of smoke.
To resolve this issue, the MCZ Airsystem line lets you easily modify the
upper deflector assembly, which normally deals with carrying the
smoke into the flue pipe.
MIN
MA
X
Figure 28 – Adjustment of primary/secondary air.
Figure 27 – Opening/closing the fire door