Glow-worm 56-2 Back Boiler - Manual (Page 8)

8 221781A
Diagram 4.5
5190
FLUE BAFFLE
FRONT OF
BACK BOILER
FLUEWAY
Diagram 4.4
8014
INSTALLATION
CENTRE LINE
'A'
'A'
'Y'
LIMIT
MARKS
FIRE
FIXING
LIMIT
MARKS
INSTALLATION
CENTRE LINE
45
56
FIRE
FIXING
WALL
FACE
NOTCH
LIMIT
MARKS
VIEW ON
ARROWS
'Y' VIEW ON
ARROWS
'A'
FIXING
HOLE(S)
7mm Drill
Mark through the fixing holes each side of the combustion
chamber, see diagram 4.4. Remove the back boiler. Drill two
holes to accept the plugs and fixings provided.
If access to the fixing holes shown in diagram 4.4 is difficult, use
the alternative method described in Section 4.8 otherwise
proceed as Section 4.9.
4.8 Alternative Back Boiler Fixing
Position the back boiler as described in Section 4.7 paragraphs
1 to 3.
Carefully disconnect the electrical plug from the gas valve and
undo the four screws securing the combustion chamber
extension and remove, see diagram 4.8.
Mark position of fixing holes on each side of the floor protection
plate, see diagram 4.9. Remove back boiler from the opening.
Drill two holes to accept the plugs and fixings provided.
4 Installation
Diagram 4.3
PUMPED HEATING
& HOT WATER PRE-PIPING
380mm
MAX.
30mm
MIN.
22mm
95mm
22mm
238
4.4 Pumped Heating and Hot Water
The pumped flow connection must be diametrically opposite to
the pumped return connection.
Refer to diagram 1.4 for a diagrammatic layout.
If it is necessary to route pipework from both sides of the
builder’s opening it is recommended that the heat exchanger is
positioned on the combustion chamber such that the flow pipe
exits on the same side as the back boiler connections.
It is recommended that the pumped return is prepiped as in
diagram 4.3.
If the heat exchanger connections are opposite hand to that
required, turn in the same manner as described in Section 4.3
paragraph 7.
4.5 Pump
Isolating valves, integral if possible, must be fitted each side of
the pump.
4.6 Gas Supply
The gas installation must be fitted in accordance with the
recommendations of the current issue of BS6891.
See diagram 1.1 for position of gas connection.
It is recommended that the gas supply enters the builder’s
opening on the right hand side.
If the gas supply enters from the left hand side it will be
necessary to route the pipe behind the combustion chamber
before final fixing, see diagram 4.2 and 4.3.
4.7 Positioning the Back Boiler
To position the back boiler lift by the casting and place centrally
in the builder’s opening. The installation centre line is marked
on the combustion chamber extension and by a notch on the
front edge of the floor protection plate.
The back boiler must be positioned so that a line across the
opening of the fire fixing wall face falls between the appropriate
front and rear limiting marks, see
diagram 4.4.
The easiest method of aligning the back boiler is to use a
straight edge across the top of the combustion chamber
extension. It is important that the back boiler is square to the
fire front fixing wall face.
Check that the back boiler is level. If packing is required to
adjust the level of the back boiler, use metal shims and pack
under the full width of the base.