Supplied By www.heating spares.co Tel. 0161 620 6677
12
Refer to Fig 14.
Extend a gas supply pipe of not less than15 mm OD copper to the
boiler and connect to the gas service cock.
Note:
Natural Gas:
A working gas pr
essure of 20 mbar (8 in wg) should
be available at the boiler inlet with the boiler firing at full DHW output.
Pr
opane:
A working gas pr
essure of 37 mbar (14.9 in wg) should
be available at the boiler inlet with the boiler firing at full DHW output.
4.5
GAS CONNECTION
4.
7.1
PREPARING THE AIR/FLUE DUCTS
16
The safety valve is located at the bottom RHS of the boiler
.
Connect a copper discharge pipe of not less than 15 mm diameter to
the safety valve outlet.
The pipe should be positioned so that the discharge of water or
steam can be noticed, but cannot create a hazard to the occupants
of the premises or damage electrical components or wiring.
4.6
PRESSURE RELIEF VALVE
PIPE CONNECTION
MEASURING THE EXACT FLUE LENGTH
F
AN OUTLET
EXTERNAL
Dia. 60mm
•
TOT
AL FLUE LENGTH FROM
FLUE OUTLET CENTRE TO
OUTSIDE WALL FACE:
= LENGTH
L
W
ALL
L
•
•
•
•
15
MOUNTING THE BOILER
LOCA
TING TABS
SIDE WINGS
•
•
•
LIFTING POINT
•
4.7
AIR FLUE DUCT INSTALLATION
If the wall thickness is less than 800mm (31 in) the air/flue duct
may be fitted without access to the external wall providing that the
optional wall liner is used. (This is necessary to seal any cavity
and to allow the sealing ring to pass through from inside but still
open and provide an adequate seal). The wall liner is a tube
diameter 130mm with a wall thickness of 0.8mm.
a)
Measur
e the required flue length as shown in Figure 16.
Refer to section 2.5 to determine whether any extension
kits are required. Installations using only the standard ducts
or standard ducts with straight extensions are described in
this section. Installation instructions for all other flue
systems are described in the supplements at the rear of this
booklet.
b)
Fit the exter
nal sealing ring to the terminal and assemble
the air/flue ducts as shown in Figure 17. The standard
duct is always used at the entry/exit to the boiler and the
sliding (telescopic) terminal is always slid into the end of
the standard or extension duct (where appropriate).
c)
Achieve the cor
rect flue length using Figure 18 as a guide.
Note that the flue length is measured to the inside of the
external wall sealing ring. In most cases it will be possible
to achieve the required flue length without cutting the
ducts, however where necessary the plain ends of the
extension ducts may be cut.
Never cut the swaged
end
, and always ensur
e that the cut is square and free of
burrs or debris. The minimum overlap of the telescopic
section is 50mm (2 in).
d)
Assemble the flue using Figur
e 19 as a guide. It is
important that the steps are carried out in the order stated
in Figure 19. When securing the ducts in position always
drill two 3.3 mm diameter holes in each extension air duct
joint and use the self tapping screws provided to secure
each joint.
NOTE IT IS ESSENTIAL THA
T THE TERMINAL IS FITTED THE
CORRECT WAY UP See Fig 17 (i.e. rainshield at the top).
