Limitations Of Use; Operation - Unigas PN91 Manual Of Installation - Use - Maintenance

LIMITATIONS OF USE

THE BURNER IS AN APPLIANCE DESIGNED AND CONSTRUCTED TO OPERATE ONLY AFTER BEING CORRECTLY CONNEC-
TED TO A HEAT GENERATOR (E.G. BOILER, HOT AIR GENERATOR, FURNACE, ETC.), ANY OTHER USE IS TO BE CONSIDE-
RED IMPROPER AND THEREFORE DANGEROUS.
THE USER MUST GUARANTEE THE CORRECT FITTING OF THE APPLIANCE, ENTRUSTING THE INSTALLATION OF IT TO
QUALIFIED PERSONNEL AND HAVING THE FIRST COMMISSIONING OF IT CARRIED OUT BY A SERVICE CENTRE AUTHORI-
SED BY THE COMPANY MANUFACTURING THE BURNER.
A FUNDAMENTAL FACTOR IN THIS RESPECT IS THE ELECTRICAL CONNECTION TO THE GENERATOR'S CONTROL AND
SAFETY UNITS (CONTROL THERMOSTAT, SAFETY, ETC.) WHICH GUARANTEES CORRECT AND SAFE FUNCTIONING OF
THE BURNER.
THEREFORE, ANY OPERATION OF THE APPLIANCE MUST BE PREVENTED WHICH DEPARTS FROM THE INSTALLATION
OPERATIONS OR WHICH HAPPENS AFTER TOTAL OR PARTIAL TAMPERING WITH THESE (E.G. DISCONNECTION, EVEN
PARTIAL, OF THE ELECTRICAL LEADS, OPENING THE GENERATOR DOOR, DISMANTLING OF PART OF THE BURNER).
NEVER OPEN OR DISMANTLE ANY COMPONENT OF THE MACHINE.
OPERATE ONLY THE MAIN SWITCH, WHICH THROUGH ITS EASY ACCESSIBILITY AND RAPIDITY OF OPERATION ALSO
FUNCTIONS AS AN EMERGENCY SWITCH, AND ON THE RESET BUTTON.
IN CASE OF A BURNER SHUT-DOWN, RESET THE CONTROL BOX BY MEANS OF THE RESET PUSHBUTTON. IF A SECOND
SHUT-DOWN TAKES PLACE, CALL THE TECHNICAL SERVICE, WITHOUT TRYING TO RESET FURTHER.
WARNING: DURING NORMAL OPERATION THE PARTS OF THE BURNER NEAREST TO THE GENERATOR (COUPLING
FLANGE) CAN BECOME VERY HOT, AVOID TOUCHING THEM SO AS NOT TO GET BURNT.

OPERATION

ATTENTION: before starting the burner up, be sure that the manual cutoff valves are open and check that the pressure
upstream the gas train complies the value quoted on paragraph "Technical specifications".
N.B. be sure the cutoff valves on the delivery and return pipes are OPEN.
Turn the burner on by means of its main switch A (see next pictures).

Check that the burner is not locked (LED E lights up); if so, reset it by pressing the reset button N.

Check that the series of thermostats (or pressure switches) enable the burner to start up.

At the beginning of the start-up cycle the servo control drives the air damper to the maximum opening, the fan motor starts and the

pre-purge phase begins. During the pre-purge phase the complete opening of the air damper is signalled by the indicator light F on
the front panel.
At the end of the pre-purge the ignition transformer is energised (signalled by the indicator light C on the panel). Two seconds later,

the oil valve opens and the ignition transformer is de-energized (light C off).
The burner is now into operation, the servocontrol begins the opening, after few seconds the burner goes to two stages operation and
eventually switches to the high flame operation, depending on the needs of the plant (light A, on) or continues with low flame operation
(light B, on).
As far as fully-modulating burners, see the Siemens RWF40 burner modulator manual.
C.I.B. UNIGAS
PART II: OPERATION
25