VOKERA Linea Installation & Servicing Instructions Manual - page 10
Supplied By www.heating spares.co Tel. 0161 620 6677
Linea Max
6
For protection of combustibles, refer to BS
5440:1 where the terminal is less than 2m
(6.6ft) above a pavement or platform to
which people have access (including any
balcony or flat roof the terminal must be
protected by a guard of durable material).
A suitable guard is available from Vokéra
Ltd. Part No 018, G.C. No. 301 106
This guard must be fitted centrally over the
terminal. Mark the positions of the fixings,
drill the wall and secure using wall plugs and
3 of 1½" No.8 plated screws.
Fig. 4
Positions
of
Air Vents
Air Vent areas
Air From
Room or
Internal
Spaces
Air Direct
From
Outside
High
Level
310 cm
2
48 in
2
155 cm
2
24 in
2
Low
Level
310 cm
2
48 in
2
155 cm
2
24 in
2
Terminal position for fan assisted boiler
(minimum distance)
mm
A
- Directly below an open window or other
300
opening (e.g. air brick)
B
- Below gutters, soil pipes or drain pipes
25
C
- Below eaves
25
D
- Below balconies or car port roof
25
E
- From vertical drain pipes and soil pipes
75
F
- From internal or external corners
25
G
- Above ground or below balcony level
300
H
- From a surface facing a terminal
600
I
- From a terminal facing a terminal
1200
J
- From an opening in the car port (e.g. door
window) into dwelling.
1200
K
- Vertically from a terminal on the same wall
1500
L
- Horizontally from a terminal on the same wall
300
M
- Horizontally from a vertical terminal to a wall
300
NOTE: The flue must be terminated in a place not likely
to cause a nuisance.
4.5
Air Supply
The following notes are intended for general
guidance.
The room sealed fan flued boiler does not
require a permanent air vent for combustion
air supply.
Where installed in a cupboard or compart-
ment ventilation is required for cooling.
The table following gives the recommended
minimum effective areas of such air vents.
4.6
Water Circulation (Central Heating)
Detailed recommendations are given in
BS 6798:1987 and BS 5449:1:1990 (for
smallbore and microbore central heating
systems).
4.6.1
The following notes are given for general
guidance.
4.6.2
Pipework
Copper tubing to BS 2871:1:1971 is recom-
mended for water pipe. Jointing should be
either by capillary soldered or with compres-
sion fittings.
Where possible, pipes should have a gradi-
ent to ensure air is carried naturally to air
release points and water flows naturally to
drain taps.
It should be ensured as far as possible that
the appliance heat exchanger is not a
natural collecting point for air.
Except where providing useful heat, pipes
should be insulated to prevent heat loss and
to avoid freezing. Particular attention should
be paid to pipes passing through ventilated
spaces in roofs and under floors.
4.6.3
By-Pass
An automatic by-pass is incorporated in the
boiler, but systems should be designed to
ensure that with all radiators turned off a
flow rate of at least 350 litres/hour (1.28
gals/min) is achieved through the system.
See 6.9.4
4.6.4
System Design
Vokèra Ltd recommend a 2-pipe system. Sin-
gle pipe systems are more liable to be trouble-
some unless carefullly designed and installed.
4.6.5
Draining Taps
These must be located in accessible posi-
tions to permit the draining of the whole
system. The taps must be at least 15mm
nominal size and manufactured in accord-
ance with BS 2879:1980.