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4.11 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. 18 at page 22.
It is therefore necessary to connect both hoses to the pump.
The pump seal will be damaged immediately if it is
run with the return line closed and the by-pass
screw inserted.
WARNING
➤ 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, (Fig. 20): unscrew the screws 1),
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.
4.12 Gas line
Disconnect the electrical power using the main sys-
tem switch.
DANGER
Check that there are no gas leaks.
Beware of train movements: danger of crushing of
limbs.
Make sure that the gas train is properly installed by
checking for any fuel leaks.
The operator must use appropriate tools for instal-
lation.
Installation
D10137
See the accompanying instructions for the adjust-
ment of the gas train.
WARNING
The gas train must be connected to the gas attachment 1)(Fig. 21),
using flange 2), gasket 3) and screws 4) supplied with the burner.
The gas train can enter the burner from the right or left side, de-
pending on which is the most convenient.
Gas solenoid 5)(Fig. 22 at page 24) must be as close as possible
to the burner to ensure gas reaches the combustion head within the
safety time period.
Make sure that the pressure governor calibration range (colour of
the spring) comprises the pressure required by the burner.
23
GB
2
3
1
D10137
D1137
Fig. 20
Fig. 21
20027066
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