Unit installation

Ed. 05/2009
User, Installation and Service Manual for F1 Gas Unit Heaters 20
Figure 15 Figure 16
C) Loosen, without removing, 4 screws for
fastening the gas supply pipe to the gas valve
(figure 16);
D) Shove off the gas pipe and take off the nozzle.
If necessary use the screwdriver as to lever it
(see figure 17);
E) Take off the gasket and mount it at the new nozzle
F) Thread the new nozzle at the seat;
G) Re-assembly the gas pipe, Check that the
round gasket inside the ring nut and the
square one at the valve fitting are positioned
correctly. Tight the ring nut whit tightening
torque of 62±2Nm; tight the valve screws;
Figure 17
H) Proceed then with the adjustment of the unit, as described in previous chapter ‘’Burner
pressure adjustment’’
I) When appliance is on, check for gas leakage with soapy solution or other suitable method.
Check all fittings - even those which were not handled during the operation;
J) Replace the label showing the type of gas for which the unit is set with the other one
indicating the type of gas actually used.
NOZZLES FOR NATURAL GAS AND LPG
F1 21 F1 31 F1 41 F1 51 F1 61 F1 81
Natural Gas (G20) (mm)
Code
4,40
072
5,40
073
6,10
075
8,00
076
9,00
077
11,10
078
LPG (G30-G31) (mm)
Code
2,50
079
3,00
080
3,25
081
3,65
129
4,20
098
4,80
130
Table 7
NOZZLE