VU BVU Universal fuel unit for oil burners

DELTA – TECHNICAL MANUAL Universal fuel unit for oil burners Type VU, BVU 1- Applications The DELTA Universal fuel unit is an efficient and modern oil burner pump. Since its mounting flange, hub and shaft sizes are manufactured to international standards (EN 225-1), it can be fitted to every type of high pressure oil burner or transfer pump applications. Its features allow an easy pump replacement with every other type of oil pump. The same unit is provided with bilateral nozzle ports and is suitable for both clockwise and counter clockwise rotation. WARNING For the use with low viscosity fuel...

DELTA – TECHNICAL MANUAL Pump type VU = standard version BVU = biodiesel version (explicit request for nonferrous metals absence) Nozzle capacity (see graph) Rotation - factory setting (seen from shaft end) R = clockwise L = counter clockwise Nozzle line open - factory setting (seen from cover) R = right L = left Pipes system - factory setting 1 = one pipe 2 = two pipes Coil type FA = NF84 230VAC 50/60Hz FC = NF84 24VAC 50/60Hz (coil with connector plug and cable set) 4- Technical specifications Oil viscosity …………………………………. Rotation speed ……………..………….……. 3500 rpm max. Standard strainer……….….………………......

DELTA – TECHNICAL MANUAL Nozzle capacity Power consumption Pressure regulation Rotation selector Shaft sealing By pass Return Suction 7 Vacuum gauge 8 Pressure gauge 9 Nozzle ports 10 Solenoid valve

DELTA – TECHNICAL MANUAL 8- Bypass installation To convert the DELTA fuel unit from the two pipe version to the single pipe version, do the following: a) Using a 4 mm Allen key, unscrew the bypass plug from the return port (Fig. 1). Fit a 1/4" plug into the return port (Fig. 2). WARNING In the two pipe version the air is bled through the return port. After conversion, the air must be bled manually, through the pressure gauge port. Make sure that the by-pass plug is not used in a single pipe installation, because the fuel unit will not function properly and damage to the pump and burner motor...

DELTA – TECHNICAL MANUAL 12- Nozzle Cut-Off Test 1. Make sure that the by-pass plug is not used in a single pipe installation, because the fuel unit will not function properly and damage to the pump and burner motor could result. 2. The rotation selector must be oriented with the groove vertical (L) or horizontal (R). 3. Do not use fuel with additives to avoid the possible formation over time of compounds which may deposit between the gear teeth, thus obstructing them. 4. After filling the tank, wait before starting the burner. This will give any suspended impurities time to deposit on the bottom...