Unigas HTP90A, Installation, User'S, And Maintenance Manual, Page: 37 / 60

C.I.B. UNIGAS - M039219CA
37
LIMITATIONS OF USE
THE BURNER IS AN APPLIANCE DESIGNED AND CONSTRUCTED TO OPERATE ONLY AFTER BEING CORRECTLY CON-
NECTED TO A HEAT GENERATOR (E.G. BOILER, HOT AIR GENERATOR, FURNACE, ETC.), ANY OTHER USE IS TO BE CONSI-
DERED 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 THE EVENT OF REPEATED LOCKOUTS, DO NOT PERSIST WITH THE RESET BUTTON AND CONTACT QUALIFIED PER-
SONNEL WHO WILL PROCEED TO ELIMINATE THE MALFUNCTION.
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
z
Choose the typer of fuel by turning the A switch, on the burner control panel.
CAUTION: if the fuel chosen is light oil, be sure the cutoff valves on the feed and return pipes are open.
z
Check the control box is not locked (signalling light O , on); if so, reset it by means of the pushbutton C .
z
Check the series of thermostats and pressure switches turn the burner to on.
Gas operation
z
Check the gas feeding pressure is sufficient (signalling lamp G on).
z
the gas proving system test begins; when the test is performed the proving system LED turns on. At the end of the test, the burner
staring cycle begins: in case of leakage in a valve, the gas proving system stops the burner and the lamp
E turns on. Reset it, by
means of the reset pushbutton on the device, in burners with VPS504 (pushbutton LB in picture), or by the D pushbutton on the
burner panel if this one is fitted with LDU11 proving system.
NOTE: if the burner is fitted with Dungs VPS504, the pre-purgue phase starts once the gas proving system is successfully performed.
Since the pre-purgue phase must be carried out with the maximum air rate, the control box drives the actuator opening and when the
maximum opening position is achieved, the pre-purge time counting starts.
z
At the end of the pre-purge time, the actuator drives the complete closing (ignition with gas position) and, as this is achieved the
ignition transformer is energised (LED
L is on); the gas valves open.
z
Few seconds after the valves opening, the transformer is de-energised and lamp L turns off.
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”. Read care-
fully the “WARNINGS” chapter in this manual.
PART II: OPERATION
VPS504
LC
LB