Datasheet Content
[{"filename":"A-AD_en.pdf","text":"deltapumps.com\n\n\n\n\n A\n AD\n Oil burners fuel unit\n\n\n\n\n DE116-1021\ndelta-elektrogas.com\n\f DELTA – TECHNICAL MANUAL\n\n\n\nOil burners fuel unit\nType A, AD\n On initial commissioning, it is possible to bleed the air\n more quickly, through the pressure gauge port.\n Because a vacuum now exists oil, due to atmospheric\n pressure, enters the suction chamber through the filter.\n1- Applications From the suction side, the gears pass the oil to the\n pressure chamber, where it comes up against the head\nThe DELTA aluminium fuel unit type A is an efficient and of the piston. Due to the build up of pressure, the piston\nmodern oil burner pump, provided with bilateral delivery is forced back against the pressure regulating spring.\nports. Hub and shaft sizes are manufactured to In the A type the flow of pressurized oil is interrupted by\ninternational standards (EN 225-1), so it can be fitted to an incorporated solenoid valve (10), and can, therefore,\nevery oil burner. be opened following the start of the motor (pre-purge), or\nThe pump type A is designed for pumping oil in high interrupted before stopping the motor itself (instant shut-\npressure oil burners and transfer pump applications. Its off of the flame preventing the nozzle dripping). The\nfeatures allow an easy pump replacement with every excessive oil discharges to the return side (or by-passes\nother type of oil pump: the same unit is provided with in the one pipe version). It will be realized of course that\nnozzle port in both the left and right sides. the spring tension, which is varied by the regulating\n screw (1), regulates the pressure of oil required.\n WARNING\nFor the use with low viscosity fuel (lower than The AD type does not have an integrated cut-off system.\n2.5cSt, i.e. Kerosene) standard pump can be used When the burner motor starts, the oil will be discharged\nwithout exceeding 12 bar. from delivery ports straight away.\nTo pump biodiesel or fuel containing it in any WARNING\npercentage, it is necessary the “B” version with\n If the AD pump is used to provide oil to the nozzle, a\nspecial seals. On request the pump can be provided shut-off valve must be fitted in the nozzle line.\nfree of nonferrous metals.\nThis unit must not be used to pump water or acid. The pump can be converted from the two pipe version to\n the single pipe version, removing the bypass plug (4)\n from the vacuum port.\n2- Operation When the unit is converted to the single pipe version, on\nThe type A fuel unit consists of a pump, solenoid valve initial commissioning the air must be bled through the\n(A type only), filter and pressure regulator. The pumping pressure gauge port (in this case lift installation are not\naction is obtained from a gerotor (2), where the inner recommended).\nrotor is connected to the drive shaft (3). The aluminium The cartridge filter (11) located in the front side, allows\npump casting provides the various oil ways, for the an easy cleaning without to dismount any part of the\nsuction (6), return (5) and nozzle ports (9). Pressure (8) unit.\nand vacuum (7) gauge ports are also provided.\nOn start up, the rotating gears purge the air from the\nsuction chamber, through a vent groove in the piston to\nthe return line in two pipe version, and through the\nnozzle line (after the solenoid valve opening) in one pipe\nversion.\n\n\n\n\n 2-6\n\f DELTA – TECHNICAL MANUAL\n\n\n3- Pump identification A 1 R 2 F A\nPump type\nA = with built-in solenoid valve\nAD = without solenoid valve\n\nB prefix = biodiesel version\n(explicit request for nonferrous metals absence)\n\nNozzle capacity\n(see graph)\n\nRotation (seen from shaft end)\nR = clockwise\nL = counter clockwise\n\nPipes system\n1 = one pipe\n2 = two pipes\n\nCoil type\nF = NF84 (coil with connector plug)\n\nCoil power supply\nA = 230 VAC 50/60Hz\nB = 110 VAC 50/60Hz\nC = 24 VAC 50/60Hz\n\n\n\n4- Technical specifications\nOil viscosity …………………………………. 1,2 ÷ 12 cSt\nOil temperature ……………………………... 60°C max.\nPower consumption ………………………... See graphs\nNozzle capacity ……………………………... See graphs\nFine adjustable pressure …….................... 6 ÷ 20 bar\nMinimum pressure …………………………. 2,5 bar (for oil transfer applications)\nSuction line vacuum ……………………….. 0,5 bar max.\nSuction line pressure ……………….……... 2 bar max.\nReturn line pressure ……………………….. 2 bar max.\nStarting torque ……………………………… 0,1 Nm max.\nRotation speed ……………..………….……. 3500 rpm max.\nStandard strainer …..….….………………... Stainless steel mesh 130µ, 11cm²\nDimensions (EN 225-1) .……………………. Hub Ø32, shaft Ø8\nConnections (ISO 228-1) …………………... Inlet – Return : G1/4\n Nozzle port : G1/8\n Pressure – vacuum gauge : G1/8\nWeight ……………………………………….. A = 720 g AD = 600 g\nStandard factory settings ………………… Pressure setting: 10 ±0,3 bar\n Standard coil: 230 VAC 50/60Hz\n Standard cable set: 3 cores, 700 mm\n\n5- Solenoid valve specifications (A type only)\nPower absorbed .……………………………. 9 W\nVoltage tolerance …………………………… -15% / +10%\nAmbient temperature .……………………... 0°C / 60°C\nOperating pressure ……………………….... 25 bar max.\nFlow factor (VDI/VDE 2173) ……………….. 0,059 m3/h\nCut-off pressure …………………………….. 2 bar\nStandards ……………………………………. EN ISO 23553-1\n\n 3-6\n\f DELTA – TECHNICAL MANUAL\n\n\n6- Diagrams\n\n\n\n\n Nozzle capacity Power consumption\n\n\n\n\n7- Overall dimensions\n\n\n\n\n 1 Pressure regulation 8 Pressure gauge\n 3 Shaft sealing 9 Nozzle port\n 4 By pass 10 Solenoid valve\n 5 Return 11 Cartridge filter\n 6 Suction\n 7 Vacuum gauge\n\n\n\n\n 4-6\n\f DELTA – TECHNICAL MANUAL\n\n\n\n\n8- Bypass installation\n\n\n\n To convert the A/AD fuel unit from the single pipe\n version to the two pipe version, do the following:\n\n 1. Using a 6 mm Allen wrench, remove the 1/4\" plug from\n return port (Fig. 1).\n 2. Remove the 1/8\" plug from vacuum port .\n 3. Using a 2.5 mm Allen wrench, insert and screw the\n bypass plug in the vacuum gauge port (Fig. 2).\n 4. Screw back the 1/8\" plug into vacuum port.\n\n\n\n\n To convert the A/AD fuel unit from the two pipe version\n to the single pipe version, do the following:\n\n\n 1. Remove the 1/8\" plug from vacuum port .\n 2. Using a 2.5 mm Allen wrench, unscrew the bypass plug\n from the vacuum gauge port (Fig. 2).\n 3. Screw back the 1/8\" plug in the vacuum port\n 4. Insert and screw a 1/4\" plug into the return port (Fig. 1).\n\n\n\n\n WARNING\n In the single pipe version, the air is bled through the\n nozzle line, after the solenoid valve opening.\n In the two pipe version the air is bled through the return\n port. After conversion, the air must be bled manually,\n through the pressure gauge.\n Make sure that the bypass plug is not used in a single\n pipe installation, because the fuel unit will not function\n properly and damage to the pump and burner motor\n could result.\n\n\n\n\n 5-6\n\f DELTA – TECHNICAL MANUAL\n\n\n\n\n9- Installation and Maintenance 11- Nozzle Cut-Off Test (A type only)\n1. Make sure that the bypass plug is not used in a single pipe Fuel oil is not compressible but air is. Air trapped in the nozzle\ninstallation. line, anywhere between the fuel units nozzle port and the\n2. Do not use fuel with additives to avoid the possible formation nozzle itself, will compress during burner operation. Following\nover time of compounds which may deposit between the gear burner shutdown, any trapped compressed air will expand\nteeth, thus obstructing them. displacing the oil in the nozzle line, forcing continued oil flow\n3. After filling the tank, wait before starting the burner. This will through the nozzle that will, in effect, falsely appear to be poor\ngive any suspended impurities time to deposit on the bottom of fuel unit Cut-Off. This occurrence is particularly common with\nthe tank, thus avoiding the possibility that they might be sucked low flow rate nozzles used in conjunction with long air tubes.\ninto the pump. To verify positive nozzle Cut-Off after burner shutdown, do the\n4. On initial commissioning a dry operation is foreseen for a following:\nconsiderable length of time (for example, when there is a long 1. Remove the nozzle line and fitting from the nozzle port of the\nsuction line to bleed). To avoid damages inject some lubrication\n fuel unit and connect a 1/8\" pressure gauge to the nozzle port\noil into the vacuum inlet. (a gauge of 20 Bar or greater be used). It may be more\n5. Care must be token when installing the pump not to force the convenient to use a gauge fitted out with an extension nipple or\npump shaft along its axis or laterally to avoid excessive wear on\n with a line and flare nut to connect directly to the fitting installed\nthe joint, noise and…
