Baxi 746 Installer's Manual page 10

this manual. If the fan is likely to affect the appliance, the appliance must not be
installed unless the fan is permanently disconnected.
3.15 Normal adventitious ventilation is usually sufficient to satisfy the ventilation
requirements of this appliance. In GB reference should be made to BS 5871 Part 2 and
in IE reference should be made to the current edition of IS 813 "Domestic gas
Installations" which makes clear the conditions that must be met to demonstrate that
sufficient ventilation is available.
3.16 Propane gas appliances must not be installed in a room, which is built entirely
below ground level (See BS 5871 Pt2).
3.17 If the appliance is to be fitted against a wall
with combustible cladding, the cladding must be
removed from the area covered by the fascia. The
cladding must also not touch the fascia. (See
figure 4). We suggest that the actual fascia is used
as a template to mark the area for combustible
cladding removal and that this area is increased
by at least 2mm all round.
3.18 The minimum allowable distance from the
outside of the appliance fascia to a corner wall
having combustible material or any other
combustible surface which projects beyond the
front of the appliance is shown in figure 5.
3.19 Proprietary terminals must comply with BS
715 or BS 1289. Any terminal or termination must be positioned in accordance with BS
5440 Part 1 to ensure that the products of combustion can be safely dispersed into the
outside atmosphere. Where the appliance is connected to an unlined brick chimney it is
generally unnecessary for the chimney pot to be replaced or for a terminal to be fitted
unless the flue has a diameter smaller than 170mm.
3.20 The appliance is fitted with an A.S.D (Atmosphere sensing device). If the
appliance closes down after a period of operation for no apparent reason, the consumer
should be informed to stop using the appliance until the installation and appliance have
been thoroughly checked. The A.S.D will shut the appliance down if an unacceptable
amount of harmful products of combustion accumulate. Under no circumstances should
the A.S.D be altered or bypassed in any way. Only a genuine manufacturers replacement
part should be fitted. The individual A.S.D components are not replaceable.
INSTALLER GUIDE
Page 10
Figure 4. Removal of combustible
cladding (Fascia may differ from
that shown)