Sime FORMAT SYSTEM 25 HE Installation And Servicing Instructions page 10

lation this boiler and its associated cen-
tral heating system must be flushed in
accordance with the guidelines given in
BS 7593 "Tr eatment of wat er in
domestic hot water central heating sys-
tems".
– This must involve the use of a propri-
etary cleanser, such as Sentinel X300
or X400, or Fernox Super floc. Full
instructions are supplied with the prod-
ucts, but for immediate information
please contact GE Betz (0151 420
9563) or Fernox (01799 550 811)
directly.
– For long term protection against corro-
sion and scale, after flushing it is rec-
ommended that an inhibitor such as
Sentinel X100, or Fernox MB-1 or Copal
is dosed in accordance with the guide-
lines given in BS 7593.
Failure to flush and add inhibitor to
the system may invalidate the appli-
ance warranty.
– It is important to check the inhibitor
concentration after installation, system
modification and at every service in
accordance with the manufacturer's
instructions. (Test kits are available
from inhibitor stockists).
– At every service the Aquaguard Filter
(4.9) should be checked and cleaned.
2.5 COAXIAL DUCT ø 60/100
The air inlet-smoke outlet assembly, code
8096250, is included in the standard sup-
TABLE 3
Terminal position
A Directly below an openable window, air vent
or any other ventilation opening
B Below guttering, drain pipes or soil pipes
C/D Below eaves, balconies or carport roof
E From vertical drain pipes or soil pipes
F From internal or external corners
G Above adjacent ground, roof or balcony level
H From a surface facing the terminal
I From a terminal facing the terminal
J From an opening in the carport
(eg door, window into dwelling)
K Vertically from a terminal on the same wall
L Horizontally from a terminal on the same wall
M Horizontally from a vertical terminal to a wall
N Horizontally from an openable window or other opening 300 mm 12 in
P Above an openable window or other opening
10
ply of the appliance complete with mounting
instructions.
Note: to use only special accessories for
condensing boilers.
2.5. 1 Coaxial duct accessories
The accessories to be used for this type of
installation and some of the connecting
systems that may be adopted are illus-
trated in fig. 5.
With the pipe bend included in the kit, the
maximum length of the piping should not
exceed 4.6 meter. Where the supplemen-
tary bend code 8095850 is used, the
total length of the piping can reach a max-
NOTE: Bef or e ins t alling
accessories, lubricate the
internal part of gaskets with
silicon-based products. Avoid
using oils and greases.
max 4.6 m
– If the terminal discharges into a pathway or passageway check
that combustion products will not cause nuisance and that the ter-
Minimum spacing
minal will not obstruct the passageway.
– Where the lowest part of the terminal is fitted less than 2 m (78
300 mm 12 in
in) above ground, above a balcony or above a flat roof to which peo-
75 mm 3 in
ple have access, the terminal MUST be protected by a purpose
200 mm 8 in
designed guard. Terminal guards are available from Quinnell,
75 mm 3 in
Barrett, and Quinnell, Old Kent Road, London. State model C2,
300 mm 12 in
(G.C. Part No 382946).
300 mm 12 in
– Where the terminal is fitted within 850 mm (34 in) of a plastic or
600 mm 24 in
painted gutter, or 450 mm (18 in) of painted eaves, an aluminium
1,200 mm 48 in
shield at least 1,500 mm (59 in) long must be fitted to the under-
side of the painted surface.
1,200 mm 48 in
– The air inlet/outlet flue duct MUST NOT be closer than 25 mm (1
1,500 mm 60 in
in) to combustible material.
300 mm 12 in
– In certain weather conditions the terminal may emit a plume of
300 mm 12 in
steam. This is normal but positions where this would cause a nui-
sance should be avoided.
300 mm 12 in
imum of 2.9 meter. When the vertical
extension code 8086950 is used, the ter-
minal part of the pipe must always come
out horizontally.
2.5.2 Positioning the
outlet terminals
The outlet terminals for forced-draught
appliances may be located in the external
perimeter walls of the building.
To provide some indications of possible solu-
tions, Table 3 gives the minimum distances
to be observed, with reference to the type
of building shown in fig. 6.
NOTE: Place the duct horizontally.
KEY
1a-b Coaxial duct kit code 8096250
2 Extension L. 1000 code 8096151
3 Vertical extension L. 140
with take-off point code 8086950
4 90° additional bend code 8095850
Fig. 5
Fig. 6