SG10050602
GENERAL INSTRUCTIONS
The SG100 & 170 burners are
supplied for On/Off or High/Low
operation and for use with single
phase electrical supply. Where an
instruction or information is
applicable to only one of the burner
types, single or two stage, then this
is indicated in the text.
This manual is structured to enable
the user to proceed from the delivery
of the burner to its commissioning
and use.
The conditions to be fulfilled and the
controls and adjustments to be used
are dealt with in the sequence that
should be followed for the correct
assembly installation and use.
Commissioning procedures are
described and the location of
necessary controls and adjustments
to undertake these runs are
illustrated and supported by
appropriate tabular matter and
graphs.
Routine Maintenance and Fault
Finding complete the manual;
literature on proprietary components
is available on request.
SETTING COMBUSTION HEAD
The venturi flame ring assembly is
adjustable longitudinally so that the
restriction between the air diffuser
and the throat of the flame tube
effectively meters the combustion air
and therefore the assembly should
be set to approximately the position
corresponding to the required gas
rate.
Method of Adjustment
Undo the two safety bolts of the
hinged extension.
Remove one hinge pin on the
opposite side to that which it is
required to swing the burner.
Unplug any electrical connections
that are restricting movement.
Swing the burner body away slowly,
at the same time unclipping the
ignition and flame detector leads.
Undo the lock nut clamping bolt.
Lift out the venturi flame ring
assembly.
Undo the socket set screw.
Adjust the position of the assembly
in the socket of the supporting elbow
aligning the required scribed ring
against the end of the socket.
The positon is relative to the firing
rate of the burner, the graph below
shows the relation between the head
setting and burner output.
Secure the assembly and replace in
reverse order taking care that the
assembly sits squarely on the gas
inlet spigot and is squarely locked
in position by its clamping bolt, and
that the burner is swung back into
position the ignition and flame
detector leads are carefully clipped
back on their respective electrodes
(the terminal ends are dissimilar so
that they cannot be wrongly
connected).
BURNER AIR CONTROLS
The air for combustion is controlled
by an adjustable air flap located
inside the air inlet on the right hand
side of the burner viewed from the
rear.
Its purpose is to regulate and control
the volume of combustion air flowing
through the burner.
On all burners the air adjustment can
be made with or without the cover
fitted with the use of an Allen key.
There is a visible scale to assist in
the setting of combustion air, it is
numbered between 1 and 22.
Final fine adjustment must be made
with the cover on.
Air Diffuser
The air diffuser is fitted to the front
end of the inner assembly and
located within the flame tube.
It controls the volume of combustion
air and creates a pressure drop over
the burner head to ensure good fuel/
air mixing and flame stability.
Burner Output (kW)
H
e
a
d
S
e
tt
in
g
He
ad
S
ett
ing
SG100
C
h
a
m
b
e
r
R
e
s
is
ta
n
c
e
(
m
b
a
r)
SG170
VENTURI HEAD SETTING
