Hoffmann&Hoffmann Dripmaster EDD-4C User Manual Download Page 1

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2015 Hoffmann & Hoffmann Ltd.

Rev. 11, December 2015

Dripmaster EDD-4C

U.S. Patent No. 5,996,739 & other countries

User Guide

Document filename: Dripmaster_EDD-4C_User_Guide_21 Dec15.doc

Important notice: Hoffmann & Hoffmann reserves the right to change this document without further notice due
to design improvements, functional modifications or quality/reliability amendments.

Summary of Contents for Dripmaster EDD-4C

Page 1: ...t No 5 996 739 other countries User Guide Document filename Dripmaster_EDD 4C_User_Guide_21 Dec15 doc Important notice Hoffmann Hoffmann reserves the right to change this document without further notice due to design improvements functional modifications or quality reliability amendments ...

Page 2: ...2 CAUTION ENSURE THE FREE FLOW OF OIL From oil tank To drain Entire drain tube must face downward to prevent oil backup ...

Page 3: ... Setting Normal pump on Mode Drip Rates 16 Pre lube pump off Mode 17 Manual Control 17 Section 4 Theory of Operation 19 General 19 Search Feature 21 Push Down and Push up Features 22 Section 5 Maintenance and Troubleshooting 23 Section 6 Specifications 25 Overall Dimensions 26 Section 7 Dripmaster Service Policy 27 Installation 27 Repair procedure 27 PC Board Replacement in the Field 28 Product wi...

Page 4: ...EDD 4C Needle Valve Assembly 18 Figure 9 Common Needle Valve compared to Dripmaster 19 Figure 10 Dripmaster functional diagram 20 Figure 11 Dripmaster EDD 4C Needle Valve Assembly 21 Figure 12 Dripmaster dimensions 26 Figure 13 Dripmaster PC board replacement 28 List of Tables Table 1 Connection box power and control lines 11 Table 2 Pump On Off conditions 12 Table 3 Control panel controls and ind...

Page 5: ... and controlling the drip rate 55 times per hour There are two modes of operation Normal pump on mode when the well pump is operational Pre lube pump off mode ensures that the line shaft is lubricated prior to turning on the well pump Automatic switching between the Normal pump on and Pre lube pump off modes is achieved by remotely sending a control signal to the Dripmaster The SCADA interface pro...

Page 6: ... 115 VAC or 220 VAC or 24 V DC AC must be available at the well pump An eight wire control cable containing wires not smaller than 22 AWG needs to be laid between the well pump and the local PLC enclosure A sturdy vertical pole with a welded metal plate should be in close proximity to the well pump Note For large oil tanks 35 to 50 gallons mount the Dripmaster to the oil tank stand ...

Page 7: ...inimal oil pressure on the needle valve especially when the oil tank is almost empty the oil inlet should be in the range of 10 to 14 inches below the oil tank 10 to 14 inches 25 4 to 35 6 cm 1 4 inch 0 635 cm copper pipe Oil filter Oil tank 1 4 inch flexible copper tubing Lineshaft ENTIRE TUBE MUST FACE DOWNWARD Figure 2 Installation requirements ...

Page 8: ...etal plate that mounts the Dripmaster according to the drilling template shown in Figure 3 Note The mounting centers for the Dripmaster are shown on the back of the unit for convenience Mounting the unit does not require more than four bolts 2 Remove the Dripmaster front covers 3 Place a bolt into a mounting hole and keep it in place by using a nut 4 Repeat step 3 for the other bolts 5 Secure the ...

Page 9: ...box according to Figure 5 Connections are described in detail in Table 1 on page 11 Control cable Power cable 115 VAC 220 VAC or 24 VDC 24 VAC optional 24VAC DC S B Pre lube pump off mode LL Total lack of oil PULSE Drip indication O K Sufficient lubrication I I J J J J J J Voltage selector switch SW1 115 VAC 220 VAC 24 VDC 24 VAC optional Note You can shut down the pump automatically using the O K...

Page 10: ... LL PULSE and O K Note Avoid daisy chain connections of the control signal returns if the ground potentials of each return differ 1 Set the power switch SW1 located just below the transformer for line power 115 VAC or 220 VAC or 24 V DC AC according to your requirements See Figure 5 2 Route the power cable through a cable strain relief on the left side of the connection box Figure 4 3 Connect the ...

Page 11: ...pump is on and the Dripmaster is in Normal mode the OK signal indicates that oil is provided to the well pump in excess of 15 dpm which is the factory preset threshold Also when the pump is on and the drip rate falls below 15 dpm the OK relay contacts open and signal to the pump drive circuit to shut down the pump There are two possible scenarios when the Dripmaster is switched to the Normal mode ...

Page 12: ...lter supplied to the oil tank Figure 2 Important The oil filter is essential as it prevents blockage in the needle valve 7 Connect the Dripmaster oil outlet Figure 8 on page 18 and Figure 2 to the well shaft inlet by means of flexible inch copper tubing Setting the Drip Rate 1 Set the dip switch settings for the Normal pump on mode using the drip rate setting toggle switches see Setting Normal pum...

Page 13: ...n 8 8 Manual Operation 9 9 10 10 Valve Closing 11 11 Dripmaster window area Drip rate display 17 17 Figure 7 Dripmaster control panel Table 3 Control panel controls and indicators Item number Figure 7 Name Control or Indicator Function 1 Oil Red LED Lights if the valve is completely closed indicating a complete absence of oil A corresponding relay contact closes when this LED is on The terminal fo...

Page 14: ...he photoelectric sensors in the Dripmaster needle valve assembly see Figure 11 on page 21 In the Pre lube pump off mode the DRIP LED flashes approximately every 30 seconds indicating that oil is flowing to the line shaft at a 2 dpm rate 5 OPEN Green LED Lights when the motor is opening the valve 6 Open Valve SW16 Push button Press to manually open the valve for troubleshooting and can be used to s...

Page 15: ...ze interval when in Normal mode During this interval which occurs once per minute the needle valve may be opened or closed in order to adjust the drip rate 17 Display switch Toggle switch Controls the two digit numerical display In the down position recommended When pump is on displays the last minute drip count for a period of six seconds The display goes off until the next minute drip count is d...

Page 16: ...l drip rate is 2 drips minute or more than the preset value The valve opens if the actual drip rate is 1 drip minute less than the preset value Setting Normal pump on Mode Drip Rates During normal operation when the well pump is operating the drip rate is selectable for drip rates of 20 25 30 35 or 40 drips minute Figure 7 The toggle switch positions for each drip rate are shown below 20 dpm toggl...

Page 17: ...s automatically set to 2 dpm Manual Control This mode permits emergency operation in the rare case when there is a suspected failure of the main circuitry Select the manual mode by switching the Mode toggle switch to the upper MAN position Figure 7 This mode bypasses the electronic control circuitry and allows the operator to modify the drip rate by using the Open Valve manual and Close Valve manu...

Page 18: ...low the valve is always open independent of the solenoid Figure 8 Dripmaster EDD 4C Needle Valve Assembly The internal solenoid is powered by the Dripmaster power source When powered up the solenoid allows oil flow When powered down the solenoid blocks oil flow To allow oil flow when the Dripmaster is not powered on turn the manual oil flow switch to the right 90 degrees ...

Page 19: ...aster The components that make this possible are described below The servo motor regulates the needle valve aperture according to the preset drip rate value A photoelectric sensor detects the drips and reports the drip count to the control circuitry The control circuitry sets the mode of operation and generates the alarms and drip count information to the SCADA interface The Dripmaster EDD 4C inco...

Page 20: ... applied during the previous minute Freeze mode During the freeze period the servo motor is actuated to compensate for drip rate deviations A built in fail safe relay O K relay is energized when the drip rate exceeds fifteen drips per minute in the Normal pump on l mode External dry relay contacts permit direct control such as pump shut off Other dry contacts in the Dripmaster are available to tra...

Page 21: ...24 V DC AC voltage sets the Dripmaster to the Pre lube mode of operation Removing the 24 V DC AC voltage causes the Dripmaster to switch to the Normal pump on mode Search Feature In exceptional cases where only a few drops are counted or none at all the drip search function is activated This situation occurs if there is needle valve blockage or when there is a continuous flow of oil In the continu...

Page 22: ...il flow Whenever the system power 115 VAC 220 VAC or 24 V DC AC is on the energized solenoid allows oil flow Oil flow stops when the system power ceases The oil flow can be manually opened or closed via the manual oil flow switch Figure 11 When the solenoid switch is in the vertical position operation is automatic controlled by the solenoid Turn the solenoid switch 90 degrees clockwise to the hori...

Page 23: ...s on the display Changing the mode toggle switch item 8 in Figure 7 on page 13 Ignore You want to quickly stabilize the Dripmaster for a new drip rate You just refilled the oil tank You just increased the drip rate setting in the Normal pump on mode With the Mode toggle switch item 2 in Figure 7 on page 13 in automatic AUTO hold down the Close push button momentarily to slow down the drip rate Wit...

Page 24: ... overflow hose Refill the oil tank Open the shut off valve Change the oil filter or clean out any obstructions in the pipe between the oil tank and the Dripmaster inlet Clean out any obstructions in the pipe between the Dripmaster outlet and the line shaft Note Reset the system after fixing the problem See Resetting the Dripmaster on page 15 Initially the drip search is engaged within 90 seconds T...

Page 25: ... 0 5 A 110 VDC 0 2 A 24 VDC 1 A S B Normal Pre lube mode control 24 V DC AC Duty cycle 60 secs count 6 secs freeze Drip stabilizing tolerance From x 1 to x 2 dpm where x is the pre selected drip rate Oil on off solenoid 24 VDC 24 VAC optional Oil inlet outlet Male thread BSP Dimensions W x H x D 10 24 x 11 02 x 3 54 inches 260 x 280 x 90 mm Weight 11 lbs 5 kg All specifications shown are subject t...

Page 26: ...cm 4 72 inches 12 0 cm Drip verification peephole Oil outlet 1 8 inch BSP Display window Oil inlet 1 8 inch BSP Connection box 1 4 inch screws 8 places 4 80 inches 12 2 cm Power cable entry Control cable entry Figure 12 Dripmaster dimensions The Dripmaster enclosure is made of painted cast aluminum ...

Page 27: ...e Table 5 on page 23 and indicating which of the procedures failed the notice This should be directed to the local representative where he has a service agreement 3 Hoffmann Hoffmann s representative will respond within two working days 4 The problem might be fixed by the representative in one or more of the following ways a Remotely instruct the customer on how to solve the problem by phone b On ...

Page 28: ...ow directions shown in Figure 13 below 2 Remove main PCB mounting screws 3 Remove cable connectors and terminal block wires Note Replacement PC board comes with cables connectors and terminal block wires Figure 13 Dripmaster PC board replacement Reverse procedure above to install the replacement PC board ...

Page 29: ...gnosis will be made and repair completed providing the repair charges are less than 500 USD b We will diagnose but not repair a returned unit and notify by email or by fax the estimated charges if any of the following apply i Repair charges exceed 500 ii You specifically requested an estimate of required repairs and charges iii When the product is over 7 years old Hoffmann Hoffmann takes pride in ...

Page 30: ... specified b To obtain warranty service you must deliver the product in either its original packaging or packaging affording an equal degree of protection 2 Insurance Insurance costs will be added to all invoices 3 F O B Free On Board ALL goods are shipped F O B All shipping and insurance costs local and or foreign taxes or exportation importation duties are the responsibility of the customer 4 Cl...

Page 31: ...31 Notes ...

Page 32: ...x 7544 Petach Tikva 49170 Israel Tel 972 3 923 2567 Fax 972 3 923 2575 E mail info hw well com USA office Hoffmann Hoffmann 2757 W Jarlath Str Chicago Illinois 60645 Tel 312 277 9191 312 218 8997 Fax 866 272 8433 E mail info hw well com w w w h w w e l l c o m ...

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