Trianco Combi 50 ECO, User, Installation, Commissioning & Servicing Instructions, Page: 24 / 44

21
Balanced Flue Systems
(optional extra)
The Trianco balanced flue system offers much greater
flexibility for siting, the boiler compared with a conventional
chimney. The only requirement is for a suitable outside
wall to fit the horizontal discharge terminal or, alternatively,
a single storey roof for a vertical discharge.
In additional to the siting benefit, the performance of
balanced flue boilers is virtually unaffected by high wind
conditions since the wind pressures are applied equally to
both air intake and flue gas discharge, thus creating a
balanced condition.
Whereas some balanced flue boilers rely on case sealing
to achieve a room seal, Trianco boilers have a sealed air
duct system which maintains the room sealed performance
even when the casing door is removed for burner
commissioning or adjustments.
The use of the balanced flue principle also enhances the
overall thermal efficiency of the boiler since the incoming
air extracts waste heat from the flue and returns it as pre-
heated air to the burner where it aids combustion.
The high-level kits have an additional benefit in that the
flue noise is reduced due to the coaxial arrangements of
the air and flue pipes - the flue being surrounded by an air
space forms an effective acoustic barrier.
I NSTALLATION NOTES
(a) Location.
Modern balanced flue boilers are designed to
operate at low noise levels. However, when
positioning your boiler, it is not recommended to
have the terminal facing a neighbours property or
patio etc. It should also be positioned to avoid
products of combustion entering the building.
A distance of at least 600mm must be allowed
between the terminal and any window, door or
other opening into the building, (see diagram for
recommended terminal positions Fig 15).
(b) Flue Sealing
As the flue system operates under positive pressure,
it is essential to seal all flue joints. Apply a thin
bead of silicone sealant (supplied) around flue
pipe spigot before inserting into socket.
(c) Fuel
Only Kerosene 28 sec. Class C2 is permitted for
boilers using low level flue discharge.
(d) Important
Trianco Flue Kits have been designed primarily to
use with Trianco EuroStar boilers and as such
compatibility with other makes of boiler cannot be
guaranteed.
P
O
N
C. D
B
A
E
G
K
F
F
L
H. J
H
M
B
Note (1) The terminal should be positioned so as to avoid
products of combustion entering the building.
Note (2) If the terminal is less than 2 metres above the
ground level, balcony or place to which any
person has access, the terminal must be
protected by a guard.
Note (3) The flue must be positioned so that it does not
cause nuisance and permits the dispersal of
combustion products.
RECOMMENDED MINIMUM DISTANCES
FOR TERMINAL POSITION
Appliance burner type - Pressure Jet
Minimum distances to terminals in millimetres as measured from top of chimney
or the rim of a low level discharge opening
A Directly below an opening, air brick, window etc 600
B Horizontally to an opening, air brick, window etc 600
C Below a gutter, eaves or balcony with protection 600
D Below a gutter or balcony without protection 600
E From vertical sanitary pipework
(*600)
300
F From an internal or external corner (
*600)
300
G Above ground or balcony level (
*600)
300
H From a surface or boundary facing the terminal 600
J From a terminal facing the terminal 1200
K Vertically from a terminal on the same wall 1500
L Horizontally from a terminal on the same wall 750
M Above the highest point of an intersection with the roof 600
N From a vertical structure on the side of the terminal 750
O Above a vertical structure less than 750mm from the side of the terminal 600
P From a ridge terminal to a vertical structure on the roof 1500
*Scotland 1990
Fig 15