The precast combustion chamber illustrated in this leaflet is for use
on oil and gas fired hot water and central heating boilers. The advantage
of this type of combustion are as follows:
Combustion chamber sections are set in dry and can be fired on completion
of installation in accordance with firing instructions.
Due to simplicity of design, installation costs can be considerably
reduced by using unskilled labour
Shape of construction chamber including radiant angles, ensures better
combustion and transfer of heat to boiler waterways.
Adequate wall thickness of precast sections gives extra protection
and strength, and stability of target wall.
Design incorporates low side walls and higher rear wall, to meet with
modern oil burner requirements.
Replacement of one or more precast sections can be accomplished without
disturbing the remainder of the combustion chamber
COMBUSTION CHAMBER INSTALLATION INSTRUCTIONS
PHASE I
(a)
Cover base with 3" insulation
bricks without using cement. If boiler is mounted on a hollow
Blue-brick ring, blocks are laid inside this.
(b)
Mix cement and aggregate together
with approx. 2 gallons of water. This forms the insulating concrete,
part of which is used to tamp round the inside perimeter of
the boiler base to seal against air filtration.
(c)
Use 3" insulating bricks
to build a wall to nipple height at rear boiler, and also to
cover mild-steel skirt where applicable. In narrow boilers,
1", 1½" and 2" insulating bricks are used
to cover the skirt. Use jointing cement.
PHASE II
(d)
Place pre-cast combustion chamber
in position dry.(DO NOT USE JOINTING CEMENT TO JOINT PRE-CAST
SECTIONS TOGETHER).
(e)
Using remainder of insulating
concrete from (b), fill between feet of combustion chamber sections
to height of toe.
PHASE III
(f)
Use firebricks, backed with insulating bricks and jointed
with cement, to build front wall to protect mild-steel plate
and accommodate burner quarl, this to be fitted to correct
height from floor to centre-line of burner
FIRING INSTRUCTIONS
(g)
ON INITIAL FIRING, RUN BURNER
ONE MINUTE ON, AND TWO MINUTES OFF FIRST HOUR TO ENSURE GRADUAL
DRYING OF REFRACTORIES.