Riello P300 T/G Installation, Use And Maintenance Instructions page 6

COMBUSTION CHAMBER PRESSURE - MAXIMUM OUTPUT
Operation field in accordance with DIN 4787
When the burner operates with only one, or two nozzles, the pressurization conditions are improved and no problems
arise.
DIMENSIONS OF THE TESTING COMBUSTION CHAMBER
(in compliance with ISO 5063 - 1978)
D = Boiler diameter in mm
P = Position of the boiler movable
wall (mm)
2915907
(three nozzles in operation)
For the combustion head projection carefully
follow the boiler manufacturer indications.
A proper protection with refractory material on
the combustion chamber shall be made, when
the boilers with frontal smoke box are used.
4 GB
Testing thermal load