Rendimax N EL
5
OPERATING INSTRUCTIONS
1. DESCRIPTION OF THE BOILER
1.01 Presentation of the boiler
The “Rendimax N EL” floor-standing boilers are gas-fired heat generators for central heating systems, with cast-
iron bodies.
They are fitted with electronic ignition devices, automatic operation control (electronic flame control unit) and flue
gas sensors for verifying the correct discharge of the combustion gases.
The “Rendimax N EL PV” models are also pre-fitted with a variable-speed pump, expansion vessel and safety
valve.
The boilers are manufactured as standard for operation on natural gas (G20); For operation on LPG (G31), the
boilers must be converted on-site.
1.02 Instructions and requirements
The assembly, installation, conversion to other type of gas, commissioning and maintenance of the boiler must be
performed by specialist Companies, following all the relative technical requirements and standards. The boiler must
be installed according to the Standards and Laws in force, in particular regarding the size of the boiler room, the
discharge of flue gases, the water piping, the combustible gas supply system and the electrical system.
1.03 Checking and controlling the discharge of fl ue gases
The boiler is fitted with a flue gas thermostat, which cuts off the supply of gas to the burner in the event of incor-
rect functioning of the flue.
If the flue gas thermostat is activated, unscrew the protective cover on the control panel (3, Fig. 1) and press the
manual reset button; the boiler will then re-ignite.
If the flue gas thermostat is activated frequently, shut-down the boiler and call the Service Department.
