Ed. 11/2006
User, Installation and Service Manual for F1 Gas Unit Heaters
18
BURNER PRESSURE SETTING TABLE FOR UNITS
SUPPLIED WITH LPG (G31) PROPANE OR COMMERCIAL MIX (SUPPLY PRESSURE 37 mbar)
F1 21
F1 31
F1 41
F1 51 F1 61
F1 81
Burner Pressure
(mbar)
(mmH
2
O)
36,5
372
36,5
372
36,5
372
35,5
362
35,5
362
33,3
339
CO
2
in flue
(%)
10,1 – 10,9
10,4 – 10,9
CO in flue
(ppm)
0 - 30
Table 7
A) BURNER PRESSURE ADJUSTMENT SCREW
(BY BM 762 THE PROTECTION CAP MUST BE
REMOVED)
B) INLET GAS PRESSURE CHECK TAP
VALVE HONEYWELL VK 4125A
VALVE BM 762
B
E
A
C) BURNER PRESSURE CHECK TAP
Figure 14
CONVERSION TO ANOTHER TYPE OF GAS
WARNING!
Qualified engineers must carry out this operation. Wrong and careless assembly of the gas circuit
may cause dangerous gas leakage. Use adequate seals for all connections.
If the type of gas on the identification label does not correspond to the one that will be used, the
unit must be converted and adapted to the type of gas you wish to use.
For this operation proceed as follows:
A) Cut off power and gas supply.
B)
Take off the hexagonal ring nut which clamp the gas pipe to the nozzle support (see figure 15).
Pay the attention to the internal round gasket, don’t lose or damage it.
A
B
E