Specifications

Hercules Boiler Model 9
Boiler Connections
All boiler models are fitted with 4 connections for piping. These connections are 1 ½
Inch BSP and are a female thread. It is possible to only use 2 of these connections,
however opposite angles must be used – For example Flow top right, return bottom
left. The 2 excess connections can then be capped off.
Checks on Initial Firing
Before connecting up the boiler the installer must ensure that they thoroughly flush
all of the systems pipes in order to remove any residue which could compromise the
correct operation of all system components (Pumps, valves etc).
It is also important to verify the chimney has sufficient draught, there are no
blockages and that no other appliance exhausts are inserted into the flue.
Filling up the System
Once all connections are complete the installer can proceed with the boiler
connection. Open all the vent pipes of the radiators, the boiler and the system.
Gradually open the load valve, ensuring that the air vent pipes are working correctly.
Assembly of Stove
For top outlet flue assembly
Place the Top Plate casting on the hearth and use a plumb line to determine the
centre point for the flue alignment from the opening in the closure plate to the flue
outlet opening of the Top Plate.
Mark the position of the four corners of the Top Plate with a piece of chalk (these
correspond exactly with the four corners of the Base Plate casting).
Place the Base Plate over the chalk marks
Use the chalk marks as the ‘template’ to accurately position the Base Plate (the use
of the four Base Cups is optional but when used ensure these are squarely seated
and accurately located under the Base Plate). Check the Base Plate with a spirit level
and if necessary adjust the height by turning the cups.
From this stage onwards the final position of the stove assembly is set.
Fit the Boiler Unit
Place the Boiler Unit onto the Base Plate and ensure that the bottom edges are
properly located onto the rebated Rope Seal that runs around the four sides of the
Base Plate.
It may also be advantageous to fit the plumbing elbows and the first lengths of pipe
to the Boiler Unit before locating on the Base Plate close to the rear wall of the
fireplace opening within which the stove is to be located.
Ensure that the ‘flow’ and ‘return’ pipes to the primary and secondary circuits
respectively, are fitted ‘diagonally-opposed’ for efficient water circulation within the
Boiler Unit.