Sime Murelle 25 BF, Installer'S Instructions

Page: 35 / 59

3.1 UNPACKING THE BOILER
The standard appliance is supplied in two separate card-
board cartons. In addition up to two extension duct kits may
be used. If the appliance is to be installed without access to
the outside wall, the wall liner will also be required. Unpack
each carton and check the contents against the following
lists:
Appliance package:
– combination boiler (assembled);
– installation and servicing instructions;
– users instructions;
– wall mounting templates (paper);
– wall mounting bracket;
– fixing screws with wall plugs;
– plastic bags containing:
– gas service cock;
– C.H. F/R isolation valves;
– D.H.W. isolation valve;
– D.H.W. elbow connection;
– associated fixing screws;
– associated gaskets;
– safety valve discharge pipe.
Flue Package:
– telescopic flue;
– junction collar with protective metal sleeve;
– flue elbow with gasket;
– rubber sealing rings;
– associated lip seals and screws.
3.2 FIXING THE WALL MOUNTING BRACKET
Before installing the appliance ensure that the chosen loca-
tion is suitable (section 2.2) and that the requirements for
flue position, (section 2.3), and minimum clearances, (
Table 2)
are satisfied. These minimum clearances are essential to pro-
vide access for servicing, and are included on the wall mount-
ing templates.
– Open the paper wall mounting templates. If a rear flue is
to be used, discard the side templates and secure the
rear template in the desired position. For a side flue appli-
cation, secure both the rear and appropriate side tem-
plate in position.
– Mark the position of the two wall mounting bracket fixing
holes and the flue/air duct hole on the appropriate
wall(s).
– Remove the template(s) and drill the two fixing holes using
a 10 mm masonry drill. Fit the plastic plugs provided.
– Cut the hole in the wall for the flue/air duct. The diame-
ter should not be less than 100 mm (4 in) and must be
horizontal. If the hole is not accessible from the outside
of the building, its minimum diameter should be suffi-
cient to allow the insertion of the wall liner (130 mm - 5
1
/
4
in diameter) which will be sealed with mortar. Refer
to fig. 13.
– Accurately measure the wall thickness, and note this
dimension for later use.
– Secure the wall mounting bracket in position using the
screws provided. Ensure that it is the correct way up, as
indicated in fig. 7.
3.3 HANGING THE BOILER
– Lift the appliance into position. The upper cross member
locates onto the wall mounting bracket.
– Screw in the wall mounting bracket adjusting screws until
the appliance is secure and vertical.
3.4 FLUE DUCTS PREPARATION
If the wall thickness is less than 0.5 m (19 in) the flue/air duct
may be fitted without access to the outside wall.
3.4.1 Flue/air duct lenghts
– Determine whether an extension duct is required with ref-
erence to the Z dimension shown in figs. 9-10-11. Alterna-
tively max. flue lenghts information is given in Table 7.
– If no extension ducts are required, procede to 3.5.
– If an extension duct or ducts is/are to be used, the flue and
air ducts should be joined before proceeding to the next sec-
tion. The extension ducts should be joined to each other and
to the standard ducts using the following procedure (fig. 8);
8
KEY
1 Wall mounting bracket
2 Plastic wall plug (2 Off)
3 Woodscrew (2 Off)
4 Washer (2 Off)
5 Adjustment screw (2 Off)
3 INSTALLING THE BOILER
Fig. 7
Fig. 8