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SITE REQUIREMENTS
4. MINIMUM BUILDERS OPENING
To make installation easier make the opening larger than
the minimum requirements where possible.
*see note
†
Riva 55/66/76 only
If optional convection air ducts are to be used, increase the
opening height by 300mm to enable connection to be made
before final completion of building work.
Riva 66/76 only
Dimension C may be reduced to 355mm when using the
spacer frame kit.
Consideration must be given for the clearance of 20mm
between the flue pipe and lintel/inside chimney breast
5. RIVA MF CASSETTE
Riva 40 Riva 55 Riva 66 Riva 66 Avanti Riva 76
RV40 RV55 RV66 RV66 AVC RV76
A 410mm 550mm 660mm 660mm 770mm
B 560mm 670mm 560mm 560mm 640mm
C
†
360mm 360mm 405mm* 405mm* 405mm*
* Riva 66/76 only
†
Dimension C may be reduced to 355mm when using the spacer
frame kit.
For information on frames available, please contact your local
retailer or call Stovax Ltd on 01392 474011
Consideration must be given for the clearance of 20mm between
the flue pipe and lintel/inside chimney breast.
* In the U.K
Additional information covering the installation the
appliance may be found in the following British Standards:-
BS6461, BS6999, BS8303.
6. BUILDERS OPENING
Many fireplace openings have a supporting lintel. Remove
the covering plaster to identify it's position before starting
any constructive work. Do not remove constructional lintels
without making provision to support the remaining structure
of the building. The appliance must not form any part of the
supporting structure.
6.1 The chimney/flue must have a sealed connection to the
appliance flue spigot.
6.2 The structure of the builders opening will reach high
temperatures. Use insulating blockwork to reduce the heat
transfer to the external walls, in particular the area of the
chimney breast above the opening.
6.3 Take care when finishing the chimney breast and
surrounding area. The conducted and convected heat
emitted by the appliance could be high enough to crack
normal plaster. Use a high temperature plaster, or face
the area with a suitable high temperature plasterboard.
New plaster should be fully dried before the appliance is
used, or cracking could occur.
Riva 40 only
It is possible to fit the Riva 40 into an existing, traditional, 16”
fireplace opening following the removal of any existing milner
fireback. Following the removal of the fireback and any flaunching
above, the builders opening should be checked and made good to
the dimensions shown in the table. Care should be taken to ensure
the existing chimney is in good condition and that it is possible to
make the required sealed fluepipe connections to this when the
Riva 40 is installed.
If you are in any doubt about your ability to produce a safe
opening contact your Stovax dealer for professional advice.*
Riva 55/66/76 only
Should you wish to connect air ducting to the convection system,
provision should be made to increase the opening height by an
additional 300mm. This will allow the access needed to fit the
duct pipes after connecting the flue system.