Bruciatori di gasolio Öl-Gebläsebrenner Brûleurs fioul Oil burners

3.3 HYDRAULIC SYSTEMSWARNING:■ Before starting the burner make sure that the return pipe-lineis not clogged.An excessive back pressure would cause the damage of thepump seal.■ The pump is designed to allow working with two pipes.In order to obtain one pipe working it is necessary to unscrewthe pin (2), remove the by-pass screw (3) and thenscrew again the pin (2), (see fig. 8).7654max. 4 mSYSTEM NOT PERMITTEDIN GERMANYH*Hmeters0.511.52I. D.8 mm10204060L metersI. D.10 mm204080100D55271Fig. 832D5488Fig. 7PRIMING PUMP:On the system in fig. 7 it is sufficient to loosenthe suction gauge connection (6, fig. 8) and wait until oil flows out.On the systems in fig. 9 and 10 start the burner and wait for the priming.Should lock-out occur prior to the arrival of the fuel, await at least 20 secondsbefore repeating the operation.The pump suction should not exceed a maximum of 0.4 bar (30 cm Hg).Beyond this limit gas is released from the oil. Oil pipes must be completely tight.In the vacuum systems the return line should terminate within the oil tank at thesame level as the suction line. In this case a non-return valve is not required.Should however the return line arrive over the fuel level, a non return valve isrequired.This solution however is less safe than previous one, due to the possibility ofleakage of the valve.1 - Suction line2 - Return line3 - By-pass screw4 - Gauge connection5 - Pressure adjuster6 - Suction gauge connection7 - ValveHmeters00.511.5233.5I. D.8 mm353025201586L metersI. D.10 mm10010010090703020Fig. 9 Fig. 10H*Hmax. 4 mHH*max. 4 mD5489It is necessary to install a filter on the fuel supply line.*ONLY FOR ITALY: Automatic shut-off device as per Ministry of Internal Affairs’ regulation no. 73 dated 7/29/71.H = difference of level; L = max. length of the suction line; I. D. = internal diameter.23204 GB