Burner Blast Tube Insulation; Packing Materials - Viessmann Vitocrossal 300 CT3 Series Installation Instructions Manual

Vitocrossal 300, CT3 Series Installation

Burner Blast Tube Insulation

Packing Materials

IMPORTANT
The combustion chamber door opening is smaller
in diameter than the burner blast tube. Do not attempt
to force the burner blast tube inside the combustion
chamber door. This may damage the combustion chamber
door refractory.
Follow these steps:
1. Measure the blast tube diameter.
2. Using a utility knife and narrow blade saw, cut the
combustion chamber door to the required diameter
of the blast tube.
3. Proceed with instructions below.
1. Mount burner plate A on combustion chamber door
B (if not already factory installed).
2. Mount burner (not shown) on burner plate A.
3. Ensure that burner blast tube FiberFrax insulation
(Part No. 7308 387) is filled between the burner
blast tube D and the combustion chamber door
refractory as shown C (shaded area).
WARNING
Without proper insulation, flue gases may leak out
from combustion chamber door, causing condensation
and corrosion.
Also, combustion chamber door and burner plate will
be subject to excessive temperatures.
Ensure blast tube insulation is packed in such a fashion
that it is flush with the combustion chamber door as
shown.
Note: Cross-section, combustion chamber door (may not
be exactly as illustrated)
Assembly
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