21
H
A
B
Fig. 15
A
Fuel oil filter with automatic air vent valve
B
Foot valve
Important: Install a single line fuel oil filter R
⅜
(filter
grade max. 40
µ
m) and a fuel oil air vent valve in the
oil supply.
We recommend:
■
Automatic fuel oil air vent valve with filter: FloCo-
Optimum-K (filter grade 5
µ
m); for part no. see
Vitoset pricelist.
■
For replacement during maintenance work:
Microtec MC-18 oil filter element (filter grade 5
µ
m).
For part no., see Vitoset pricelist.
For low tanks:
If the suction head or the max. pipe length is greater
than specified in the following table, install an oil feed
pump with intermediate tank in the immediate proxim-
ity of the boiler.
Max. pipe length for suction line with
7
4 mm
(internal)
Suction head H in m
Max. line run in m
+4.0
100
+3.5
95
+3.0
89
+2.5
83
+2.0
77
+1.5
71
+1.0
64
+0.5
58
0.0
52
-0.5
46
-1.0
40
-1.5
33
-2.0
27
-2.5
21
-3.0
15
-3.5
9
-4.0
—
Installation sequence
Installing the oil supply as a single line system
6136330
Installation
