Officine Gullo DFS4P, Instructions Manual

Officine Gullo

14

CHECKING PRIMARY AIR TO THE MAIN BURNERS

All the burners are fitted with an air regulator by means of which the primary air can be varied thanks to an adjustable 

bush that can be locked with a screw. In the “Burner Technical Data” table you will find the approximate values for the 

“h” parameter (primary air). The flow of primary air must be regulated so there is no detachment of the flame when the 

burner is cold or a return of the flame when the burner is hot.

The pilot air is regulated when the appliance is tested and inspected for the gas it is set for.

If you are going to change to a different type of gas, regulate the air by means of the adjusting bush until the flame 

stops sputtering and becomes an intense blue colour.

BURNER TECHNICAL DATA TABLE

Burner max 3,5 kW- min. 1,15 kW 

12,8 kWh/kg

G30

BUTANE

30 mbar

12,8 kWh/kg

G31

PROPANE

37 mbar

9,45 kWh/m3st.

G20

NATURAL GAS  H

20 mbar

Burner injector 1/100 mm

Min. output adjustment 1/100 mm

Consumption

Primary air h=mm

90

50

kg/h 0,276

open

90

50

kg/h 0,272

open

145

adjustable

m3 st./h 0,370

open

Burner max 5,5 kW- min. 1,55 kW

Burner injector 1/100 mm

Min. output adjustment 1/100 mm

Consumption

Primary air h=mm

115

60

kg/h 0,434

open

115

60

kg/h 0,427

open

175

adjustable

m3 st./h 0,582

20

Burner max 7,5 kW- min. 2,5 kW

Burner injector 1/100 mm

Min. output adjustment 1/100 mm

Consumption

Primary air h=mm

135

75

kg/h 0,591

20

135

75

kg/h 0,582

20

205

adjustable

m3 st./h 0,794

20

Burner Coup de Feu 7 kW- min. 4 kW

Burner Injector 1/100 mm

Min. output adjustment 1/100 mm

Pilot Injector 1/100 mm

Consumption

130A

100

20

kg/h 0,552

130A

100

20

kg/h 0,544

195

adjustable

35

m3 st./h 0,740

15

Officine Gullo

Burner max 3,5 kW- min. 1,15 kW 

G110

8 mbar

G150.1

8 mbar

Town gas

G110

10 mbar

Injector (marking)

By-pass (screw asjustment (number of turns anti-

clockwise from fully closed position)

Air adjustment (mm)

250

1/2

11,0

250

1/2

11,0

235

1/2

11,0 

Burner max 5,5 kW- min. 1,55 kW

Injector (marking)

By-pass (screw asjustment (number of turns anti-

clockwise from fully closed position)

Air adjustment (mm)

340

3/4

8,5

340

3/4

8,5

320

3/4

8,5

Burner max 7,5 kW- min. 2,5 kW

Injector (marking)

By-pass (screw asjustment (number of turns anti-

clockwise from fully closed position)

Air adjustment (mm)

450

1+1/2

10,0

450

1+1/2

10,0

390

3+1/2

10,0

RULES FOR CONVERTING AND INSTALLING OTHER TYPES OF GAS

Our appliances are tested and regulated for liquid gas (see plate inside).

The conversion or adaptation to another type of gas must be carried out by a specialized technician. The nozzles 

for the various types of gas are in a packet supplied with the appliance and are marked in hundredths of mm (see 

the technical data table).

CHANGING THE OPEN RING NOZZLES

Main nozzles 

Take the rungs off, remove the burners and trays, with a size 12 spanner substitute the nozzles with the appropriate ones, regulate 

the primary air (h) (see the “burner” technical data table) unscrewing the securing screw. Once regulated, tighten the screw, adjust 

the minimum flame by turning the screw to the right or left until the thermal power reaches 1,15 kW for the 3,5 kW burner, 1,55 

for the 5,5 kW burner and 2,5 kW for the 7 kW burner.

Warning: 

If liquid gas is being used the minimum adjustment screw must be locked right down.

SUBSTITUTING THE NOZZLE IN THE COUP DE FEU BURNER

Remove the panel and with a suitable spanner substitute the nozzle with another, suitable one. Adjust the minimum 

flame by turning the by-pass screw either to the right or to the left until heat output reaches 4 kW.

The primary air of the all plate burner does not need adjusting.

Attention: If liquid gas is used, the minimum flame adjustment screw must be screwed right down.