Vaillant ecoMAX 646 Installation And Maintenance Manual - page 13
13
Installation and maintenance manual ecoMAX 646 / 0020020158_02
4.5 Heating
connections
Caution!
Ensure a stress-relief assembly of the connect-
ing pipes to avoid leakages in the heating system.
The appliance is connected to the heating flow and
return via isolation valves. An installation set for the
ecoMAX 646 is available.
Caution!
It is imperative that the filling device be moun-
ted in the return; otherwise, the bleeding of the
appliance is not guaranteed.
Note!
When using a cylinder, a non return valve is to
be mounted in the supply.
• Screw in flow (3) and return (4) with the maintenance
cocks.
3
4
Fig. 4.7 Mounting the heating flow and return
4.6.1 Flue
termination
A
BCD
A
G
H, I
F
J
B F
M
L
L
K
K
G
G
F
F
E
A
A
Fig. 4.8 Flue termination
The following details refer to both flue systems.
a. The terminal must be positioned such that the prod-
ucts of combustion can disperse freely at all times.
b. A plume of water vapour will sometimes be visible
from the flue terminal. Positions where this could be
a nuisance should be avoided.
c. If the terminal is fitted less than 2 m above a balcony,
above ground or above a flat roof to which people
have access then a suitable terminal guard must be
provided and fitted (contact Tower Flue Components,
Tonbridge, TN9 1TB).
Note!
Vertical flues must not terminate within 600
mm of an openable window, air vent or any
other ventilation opening.
The flue assembly shall be so placed or sheilded as to
prevent ignition or damage to any pary of the building.
Terminal position
mm
A
Directly below an opening, above an opening or ho-
rizontal to an opening, air brick, opening window, etc.
300
B
Below gutters, soil pipes or drain pipes
75
C
Below eaves
200
D
Below balconies
200
E
From vertical drain pipes and soil pipes
25
F
From internal or external corners
300
G
Above ground, roof or balcony
300
H
From a surface facing a terminal
600
I
From a terminal facing a terminal
1200
K
Vertically from a terminal on the same wall
1500
L
Horizontally from a terminal on the same wall
300
M
Distance from adjacent for vertical Flue
500
Table 4.2 Terminal position for a fan assisted concentric flue
Note!
In addition, the terminal should not be nearer
than 150 mm to an opening in the building fab-
ric formed for the purpose of accommodating a
built–in element such as a window.
BS 5440–1 It is recommended that the fanned flue ter-
minal should be positioned as follows:
a) at least 2m from an opening in the building directly
opposite, and
b) so that the products of combustion are not directly
directed to discharge across a boundary.
1) Dimensions B, C and D:
These clearances may be reduced to 25 mm without
affecting the performance of the boiler. In order to
ensure that the condensate plume does not affect
adjacent surfaces the terminal should be extended as
shown in fig. 3.8.
2) Dimension F:
This clearance may be reduced to 25 mm without
affecting the performance of the boiler. However, in
order to ensure that the condensate plume does not
affect adjacent surfaces a clearance of 300 mm is
preferred. For IE, recommendations are given in the
current edition of IS 813.
Installation 4