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Installation
General information regarding burner installation
Tightening torques
During installation, commissioning and
maintenance, the following torques for
screw connections must be observed.
Max. tightening torques for accessories system, double gas valve
M4
M5
Siemens
3 Nm
-
Dungs
2,5 Nm
5 Nm
N.B.:
In general, the correct tightening torques have been applied when the unions are
tightened hand-tight using a screwdriver (ISO 272) or angled Allen key.
Recommended tightening torques
M4
M5
M6
2
6
10
N.B.:
In general, the correct tightening torques have been applied when the unions are
tightened hand-tight using a screwdriver (ISO 272) or angled Allen key.
Tightening torques for root connector for fan impeller
SM16 (Ø28)
SM20 (Ø38 and 42)
No.: 1615
No.: 2012
20
N.B.:
For more information regarding installation/dismantling of the fan impeller, please
refer to the relevant chapter in the operating instructions.
Tightening torques flange connection solenoid valves and gas filter
M16 / DN 65 - DN 125
max. 50 Nm
N.B.:
The unions must be tightened crosswise. The union must be checked to ensure it
is tight. If it is not sufficiently tight, the valve must be removed and checked
(tightening surfaces).
M6
M8
G1/8
8 Nm
7 Nm
15 Nm
5 Nm
Standard unions
M8
M10
M12
M16
25
48
85
210
SM25 (Ø42 and 48)
No.: 2517
30
50
03/2016 - Art. Nr. 4200 1044 8002A
G1/4
G1/2
G3/4
15 Nm
-
35 Nm
7 Nm
10 Nm 15 Nm
M20
415
Nm
Bushing
Nm
M20 / DN 150
max. 90 Nm
7
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