Oil burners fuel unit with pressure regulating Type VD Certified Quality System Printed in Italy - DE111/0404

Oil burners fuel unit with pressure regulating Type VD The DELTA fuel unit is an efficient modern oil burner pump with compact design and since its mounting flange, hub and shaft sizes are manufactured to international standards (EN 225), it can be fitted to every oil burner. • High suction capability. • Suitable for one or two pipe systems. • Self priming. • Reliable pressure and positive cut-off (two pipe). • Special rotary shaft seal. • Silent operation. • Low power absorption. • Easily installed and adjusted. • Pressure and vacuum gauge ports. 2- Applications The DELTA fuel unit type VD is...

Pump type Nozzle capacity (see graphs) Rotation (seen from shaft end) R = clockwise L = counter clockwise Nozzle line (seen from cover) R = right L = left Pipes system 1 = one pipe 2 = two pipe Pressure ranges 3 = 2 ÷ 10 bar 4 = 4 ÷ 15 bar (Standard) 5 = 8 ÷ 20 bar 6 = 10 ÷ 25 bar Special versions U = cover type U with 65 cm² stainless steel filter, mesh 110µ (standard on V5) without pressure and vacuum gauge (except V5) P = auxiliary pressure port 5- Technical Specifications Oil viscosity ………………………………… 1,2 ÷ 50 cSt Oil temperature …………………………….. 60°C max. Power consumption …………………….. Nozzle capacity……………………….…….....

6- Diagrams Nozzle capacity Power consumption 1 Pressure regulation 5 Return 6 Suction 7 Vacuum gauge 8 Pressure gauge 9 Nozzle port 10 Auxiliary pressure port 4

To convert the DELTA fuel unit from the single pipe version to the two pipe version, do the following: a) Using a 19 mm wrench, remove the 1/4" plug from b) Located inside the return plug is the by-pass plug. return port (Fig. 1). Remove it with a 4 mm Allen wrench (Fig.2). c) Insert and screw the by-pass plug in the return port (Fig. 3). Fig. 1 19 To convert the DELTA fuel unit from the two pipe version to the single pipe version, do the following: d) Using a 4 mm Allen wrench, unscrew the by-pass plug from the return port (Fig. 3). e) Insert and screw a 1/4" plug into the return port In the...

Installation and Service Instructions 9- Installation and Maintenance 11- Nozzle Cut-Off Test (two pipe) 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. 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. 3. After filling the tank, wait before starting the burner. This will give any suspended impurities time to deposit on the bottom of the tank, thus avoiding the...