Dovre VISTA 600 Instrucciones De Instalacion Y Uso página 63

be possible for air to be drawn in for combustion pur-
poses, and the air heated by the fireplace (the con-
vection air) must be able to flow freely within the
space to be heated; see following figure.
When building the hearth, follow these instruc-
tions:
The top of the hearth must be closed airtight using
a cover plate of incombustible and heat-resistant
material.
The cover plate must be level and placed at least
30 cm below the flue opening in the ceiling.
If desired, an additional outlet grate can be fitted at
the top of the hearth, just below the cover plate.
Do not use combustible material in the hearth
space and prevent thermal bridging by using
materials that conduct heat.
Follow the instruction below when building the
hearth:
1. Lay the floor of the hearth.
Make sure the door of the appliance can swing
freely over the hearth floor.
2. Build the hearth up to the smoke dome.
Ensure that a clearance of 2 mm is maintained
between the appliance and the masonry to
accommodate the thermal expansion of the fire-
place.
3. The inside of the hearth may, if desired, be clad-
ded with reflective, insulating material.
Additional cladding of the built-in space pre-
vents unnecessary thermal radiation to outer
walls and/or adjacent rooms. It also prevents
damage to the hearth wall insulation.
4. Build the rest of the hearth up to the flue opening
hole in the ceiling.
The masonry should not rest on the fireplace.
Use a support such as a steel beam. Leave a
clearance of at least 3 mm between the sup-
port and the appliance.
5. Close the built-in space with the cover plate.
6. Put an air grate below the cover plate to allow for
the ventilation of the appliance.
7. Make an opening above the cover plate in order to
prevent any pressure build-up.
Subject to change because of technical improvements
The following figure depicts an example of the place-
ment of a built-in fireplace in a hearth and the air flows
D
Opening to prevent pressure build-up in the
A
hearth
B Convection air opening
B' Convection air opening via flexible tube
C Convection air supply
C' Convection air supply via flexible tube
D Radiation
Optional set of feet
To simplify the installation of the VISTA C, the
optional set of adjustable feet (01.91679) can be used.
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