Hoffmann&Hoffmann Dripmaster EDD-4SH User Manual Download Page 29

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PC Board Replacement in the Field

11.

Remove both covers to gain access to the PC boards, and then follow 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

Summary of Contents for Dripmaster EDD-4SH

Page 1: ...nt No 5 996 739 other countries User Guide Document filename Dripmaster_EDD 4SH_User Guide_22Dec15 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 19 Manual Control 19 Section 4 Theory of Operation 20 General 20 Search Feature 22 Push Down and Push up Features 23 Section 5 Maintenance and Troubleshooting 24 Section 6 Specifications 26 Overall Dimensions 27 Section 7 Dripmaster Service Policy 28 Installation 28 Repair procedure 28 PC Board Replacement in the Field 29 Product wi...

Page 4: ...DD 4SH Needle Valve Assembly 19 Figure 9 Common Needle Valve compared to Dripmaster 20 Figure 10 Dripmaster functional diagram 21 Figure 11 Dripmaster EDD 4SH Needle Valve Assembly 22 Figure 12 Dripmaster dimensions 27 Figure 13 Dripmaster PC board replacement 29 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 in...

Page 5: ...g 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 pr...

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: ...is on and the Dripmaster is in Normal mode the OK signal indicates that oil is provided to the well pump in excess of 8 dpm which is the factory preset threshold Also when the pump is on and the drip rate falls below 8 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 1 The D...

Page 12: ...ter 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 19 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 pump...

Page 13: ...ange toggle switch 15 15 Drip rate display 16 16 12 second timer 17 17 Freeze 18 18 Display switch 19 19 Dripmaster window area 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 th...

Page 14: ...s the photoelectric sensors in the Dripmaster needle valve assembly see Figure 11 on page 22 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 SW13 Push button Press to manually open the valve for troubleshooting and can be used t...

Page 15: ...lashes every 12 seconds for timing purposes when in Normal mode You can count the number of drips seen during this 12 second interval and multiply them by five to arrive at the dpm rate This LED is useful when you want to quickly stabilize the drip rate by pressing the Open Valve SW13 or Close Valve SW15 push button 18 FR Green LED Lights to indicate the six second freeze interval when in Normal m...

Page 16: ...r AUTO position item 8 in Figure 7 so that the Dripmaster automatically stabilizes the preset drip rate At the end of each 60 second interval a short correction command is given only if there is a deviation from the desired preset drip rate The valve closes if the actual drip rate is 1 drip minute or more than the preset value The valve opens if the actual drip rate is 1 drip minute less than the ...

Page 17: ...17 14 dpm toggle switch setting 16 dpm toggle switch setting 18 dpm toggle switch setting 20 dpm toggle switch setting ...

Page 18: ...18 22 dpm toggle switch setting 24 dpm toggle switch setting 26 dpm toggle switch setting 28 dpm toggle switch setting ...

Page 19: ... modify the drip rate by using the Open Valve manual and Close Valve manual push buttons Use the Drip verification peephole see Figure 8 below to check the drip rate In this mode power is removed from the circuitry except for the push buttons motor and Manual mode LED Manual oil flow switch in automatic position solenoid controlled Drip verification peephole Oil inlet Oil outlet Internal solenoid ...

Page 20: ...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 4SH inc...

Page 21: ...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 eight 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 transmit the d...

Page 22: ...4 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 continuo...

Page 23: ...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 24: ...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 25: ... 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 16 Initially the drip search is engaged within 90 seconds T...

Page 26: ...al Pre lube mode control 24 V DC AC Duty cycle 60 secs count 6 secs freeze Drip stabilizing tolerance x when SW 18 is UP x to x 1 when SW 18 is DOWN 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 to change Tabl...

Page 27: ...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 28: ...e Table 5 on page 24 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 29: ...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 30: ...osis 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 USD ii You specifically requested an estimate of required repairs and charges iii When the product is over 7 years old Hoffmann Hoffmann takes pride i...

Page 31: ... 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 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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