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Osburn Matrix Inbuilt Installation and Operation Manual
8 CLEARANCES TO HEAT-SENSITIVE MATERIALS
The clearances shown in this section have been determined by test according to procedures set
out in safety standards AS/NZS 2918:2001 When the wood inbuilt is installed so that its surfaces
are at or beyond the minimum clearances specified, combustible surfaces will not overheat under
normal and even abnormal operating conditions.
No part of the wood inbuilt may be located closer to combustibles than the minimum clearance
figures given.
8.1 LOCATION OF THE CERTIFICATION LABEL
Since the information given on the certification label affixed to the appliance always overrides the
information published, in any other media (owner's manual, catalogues, flyers, magazines and/or
web sites) it is important to refer to it in order to have a safe and compliant installation. In
addition, you will find information about your wood inbuilt (model, serial number, etc.). You can
find the certification label on the side, towards the front of the outside of the air jacket of the
inbuilt.
To access the certification label, the faceplate may need to be removed. Therefore, we
recommend that you note the wood inbuilt's serial number on this manual, since it will be needed
to precisely identify the version of the appliance in the event you require replacement parts or
technical assistance.
8.2 POSITIONING THE UNIT
It is necessary to have a floor protection made of non-combustible materials that meets the
measurements specified in table "FLOOR PROTECTION" (see Section 8.3. To determine the need
to add floor protection (D) beyond the hearth extension, you must do the following calculation
using the data in Table Data for floor protection calculation of this section: D = B - (A - C). If the
value (D) is negative or zero, you do not have to add more floor protection in front of the unit,
because the masonry fireplace hearth extension is large enough. If the value (D) is positive, you
will need floor protection in front of the hearth extension at least equivalent to the result (D).
Here is a sample calculation to determine the need to add a non-combustible materials floor
protection. For someone whose wood inbuilt would protrude 76 mm into the room (C) the
calculation would be:
Value D = B - (A - C)
Value D = 500 mm - (416 mm - 76 mm)
Value D = 500 mm - 340 mm
Value D = 160 mm
Non-combustible floor protection of at least 160 mm in depth must be installed in front of the
fireplace hearth extension.
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