Installation
19
20019893
GB
4.8.2
Hydraulic system layout
Key (Fig. 14)
1
Pump suction
2
Filter
3
Pump
4
Pressure regulator
5
Return pipe
6
By-pass screw
7
Pump return
8
Safety solenoid
9
Low fire valve
10 High fire valve
11 Filter
M
Pressure gauge
P
Low oil pressure switch
V
Vacuum gauge
4.8.3
Hydraulic connections
The pumps are equipped with a by-pass that connects return line
and suction line.
The pumps are installed on the burner with the by-pass closed by
screw 6), see diagram Fig. 14.
It is therefore necessary to connect both hoses to the pump.
➤
Remove the plugs from the suction and return connections of
the pump.
➤
Insert the hose connectors into the connections and screw
them down.
➤
Take care that the hoses are not stretched or twisted during
installation.
➤
Route the hoses through the holes in the plate, preferably
using those on the right side: unscrew the screws 1)(Fig. 15),
now divide the insert piece into its two parts 2) and 3).
➤
Install the hoses where they cannot be stepped on or come
into contact with hot surfaces of the boiler and where they do
not hamper the opening of the burner.
➤
Now connect the other end of the hoses to the suction and
return lines.
D2596
Fig. 14
P
WARNING
The pump seal will be damaged immediately if it is
run with the return line closed and the by-pass
screw inserted.
1
2
3
Fig. 15
D10137
