Dungs FRM 100025 HD, Instruction Manual, Page: 122 / 174

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Edition 10.15 • No
. 270 442
9.2 Installation instructions
• The installation must be carried according to the installa -
tion scheme specified below.
• Install the safety shutoff valve in the flow direction (arrow/
housing).
• Design a straight calming section with the equal diameter.
• Make sure that the pulse tap at the calming section is
clean and free from burrs. Distance > 5 x DN
• Maximum flow velocity in the calming section: ≤ 30 m/s.
Pos. Designation
1 Shutoff valve, inlet side (e.g. ball valve or butterfly valve)
2 Filter
3 Welded part
4 Pressure gauge, inlet side
5 Regulator with integrated SSD
6 Calming section
7 SBV
8 Ball valve
9 Pressure gauge, outlet side
10 Test burner
11 Venting ball valve
12 Pulse line, SSD
13 Pulse line, regulator
14 Shutoff valve, outlet side (e.g. ball valve or butterfly valve)
15 Vent line regulator
16 Vent line SSD
17 Relief line SBV
• Version of the pulse lines: steel pipe D= 12 x 1.5
• Avoid accumulation of condensate: install the pulse lines
with a gradient
1
2
3
4
5
8
6
7
9
11
10
12
12
Calming section
> 5 x DN
Installation drawing
13
14
15
16
17