Unigas HP60, Manual Of Installation - Use - Maintenance

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C.I.B. UNIGAS - M03957CI
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GENERAL FEATURES
This series represents monobloc gas burners made in die-cast aluminium housing, that can burn either gas or light oil, thanks to the
adjustable combustion head which allows a good performance with both fuels. They can be provided in progressive or fully-modulating
version.
Fig. 1
1 Mimic panel with startup switch
2 Gas proving system
3 Gas valve group
4 Burner flange
5 Blast tube-Combustion head ass.y
6 Cover
7 Light oil pump
8 Pump motor
9 Gas adjusting cam
10 Actuator
Gas operation: the gas coming from the supply line, passes through the valves group provided with filter and stabiliser. This one for-
ces the pressure in the utilisation limits. The actuator (10) moves proportionally the air damper and the gas butterfly valve It drives an
adjusting cam (13) with variable shape. This one allows the optimisation of the gas flue values, as to get an efficient combustion.
Light oil operation: the fuel coming from the supply line, is pushed by the pump (8) to the nozzle and then into the combustion cham-
ber, where the mixture between fuel and air takes place and consequently the flame.
In the burners, the mixture bertween fuel and air, to perform clean and efficient combustion, is activated by atomisation of oil into very
small particles. This process is achieved making pressurised oil passing through the nozzle.
The pump (8) main function is to transfer oil from the tank to the nozzle in the desired quantity and pressure. To adjust this pressure,
pumps are provided with a pressure regulator (except for some models for which a separate regulating valve is provided). Other pumps
are provided with two pressure regulators: one for the high and one for low pressure (in double-stage systems with one nozzle).
The adjustable combustion head can improve the burner performance. The combustion head (5) determines the energetic quality and
the geometry of the flame. Fuel and comburent are routed into separated ways as far as the zone of flame generation (combustion
chamber). The control panel (1), placed on the burner front side, shows each operating stage.
How to interpret the burner “Performance curve”
To check if the burner is suitable for the boiler to which it must be installled, the following parameters are needed:
z
furnace input, in kW or kcal/h (kW = kcal/h / 860);
z
backpressure (data are available on the boiler’s ID plate or in the user’s manual).
Example:
Furnace input: 600kW
Backpressure: 4mbar
In the “Performance curve” diagram (Fig. 2), draw a vertical line matching the furnace input value and an horizontal line matching the
backpressure value. The burner is suitable if the intersection point A is inside the performance curve.
PART I: INSTALLATION
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