1701ULTRA(EC)GBEN, p. 14/29
Figure
8
:Approved
appliances
type
C
C12
wall
C32
roof
C42
roof
C52
roof
C82
roof
7.4
DIAMETER
&
MAXIMUM
FLUE
PIPE
LENGTHS
Flue
pipe
diameters
and
maximum
pipe
lengths
in
table
2
apply
to
both
horizontal
and
vertical
systems.
Add
all
straight
sections
and
equivalent
lengths
for
elbow.
The
total
combined
length
must
not
exceed
the
maximum
flue
length.
Table
2
:
IMPORTANT
:
Only
use
Muelink
&
Grol
type
Skyline
3000
for
wall
or
roof
terminal
or
equivalent
type
7.5
AIR
SUPPLY
WARNING
When
these
air
heaters
are
installed
as
type
B
appliances,
they
take
their
air
for
combustion
from
the
space
in
which
they
are
installed.
Do
not
restrict
the
combustion
air
intake.
It
is
important
to
ensure
that
there
is
an
adequate
air
supply
at
all
times
for
both
combustion
and
heating
requirements.
Modern
buildings
involve
greater
use
of
insulation,
improved
vapour
barriers
and
weather
proofing.
These
practices
mean
that
buildings
are
sealed
much
tighter
than
in
the
past.
Model ULTRA/ULTRA EC
025
035
050
075
100
Max. straight concentric length
for combustion air inlet pipe & f lue outlet pipe
(1)
m
flue/inlet pipe
15
15
15
15
15
Equivalent length of 45° concentric elbow
m
flue/inlet pipe
0,85
0,85
0,70
1,10
0,75
(1)
: ULTRA(EC) 025,035, 050 : dia 80/125mm / ULSA(EC) 075,100 : dia 100/150mm
-use same diameter for all flue pipes
-recomm ened minimum flue = 1m
2,20
1,50
Equivalent length of 90° elbow
m
flue/inlet pipe
1,50
1,50
1,50
1,50
1,50
Equivalent length of 90° concentric elbow
m
flue/inlet pipe
1,70
1,70
1,40
30
30
Equivalent length of 45° elbow
m
flue/inlet pipe
0,75
0,75
0,75
0,75
0,75
Max. straight length1 pipe B23P (flue outlet
pipe)(w ith w all or roof terminal)
m
flue/inlet pipe
30
30
30
100
100
Max. straight length 2 pipes (combustion air inlet
pipe & flue outlet pipe)(w ith w all or roof terminal)
(C appliance)
m
flue/inlet pipe
20
20
20
20
20
Heater socket & pipe dia
mm
flue/inlet pipe
80
80
80
