Hoffmann & Hoffmann Dripmaster EDD-4C User Manual

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Document filename: Dripmaster_EDD-4C_User_Guide_18May10.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.

Dripmaster EDD-4C

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

User Guide

Rev. 04, May 2010

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Summary of Contents for Hoffmann & Hoffmann Dripmaster EDD-4C

Page 1 Dripmaster EDD-4C U.S. Patent No. 5,996,739 & other countries User Guide Document filename: Dripmaster_EDD-4C_User_Guide_18May10.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. Copyright © 2010 Hoffmann & Hoffmann Ltd.
Page 2 Revision History Revision Section Notes – Initial document Installation Kit on page 9 Deleted ¼-inch fuel hose as part of installation kit Page Third line of text: ...flow switch to the right... Page 7, 10, 22, Table Figure 9 Line power includes 220 VAC Table 6 Updated specifications Last page...
Page 3: Table Of Contents
Contents Section 1: Introduction ..........................5 Overview ............................5 Section 2: Installation ..........................7 General............................. 7 Well Site Requirements........................7 Installation Kit........................... 9 Mounting the Dripmaster........................9 Wiring the Power and Control Cables.................... 10 Setting the Drip Rate........................12 Section 3: Operation ..........................13 Controls and Indicators ........................
Page 4 Figure 5: Connection box – electrical terminals: 115 VAC unit shown..........10 Figure 6: Dripmaster control panel ..................... 13 Figure 7: Dripmaster EDD-4C Needle Valve Assembly ..............18 Figure 8: Common Needle Valve compared to Dripmaster..............19 Figure 9: Dripmaster functional diagram .................... 20 Figure 10: Dripmaster EDD-4C Needle Valve Assembly ..............
Page 5: Section 1: Introduction
The Dripmaster is an active vertical line-shaft lubrication control and monitoring device. It automatically stabilizes the oil drip rate so as to comply with pump manufacturer's requirements. Figure 1: Dripmaster EDD-4C Constant drip rate is maintained regardless of ambient temperature or hydrostatic pressure in the feeding oil tank.
Page 6 End of section...
Page 7: Section 2: Installation
Section 2: Installation General The Dripmaster installation procedure is simple and does not require any special tools, but requires site preparation. Well Site Requirements • Line power (115 VAC or 220 VAC), or 24 V AC/DC must be available at the well pump. •...
Page 8: Figure 2: Installation Requirements
Important: The relative spacing between the oil tank, the Dripmaster, and the line-shaft inlet should be according to Figure 2. In order to maintain minimal 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.
Page 9: Installation Kit
Installation Kit The Dripmaster is supplied with the following parts: 1 – oil filter (fuel filter for ¼-inch hose) 4 – mounting bolts 8 – nuts 8 – lock washers 2 – cable bushings (glands) Make sure that all of the kit items are present. You need to obtain ¼-inch fuel hose to complete the installation.
Page 10: Wiring The Power And Control Cables
Wiring the Power and Control Cables Power and control cables are routed through the bottom of the connection box through two strain relief bushings. Green ground wire connects here Power cable entry Control cable entry Figure 4: Connection box – cable routing Wire the connection box according to Figure 5.
Page 11: Table 1: Connection Box-Power And Control Lines
Caution: External 24 VAC power source must be isolated from ground. 2. Route the power cable through a cable strain relief on the left side of the connection box (Figure 4). 3. Connect the green ground wire to a chassis screw or bolt, preferably using a ring terminal. See Figure 4.
Page 12: Setting The Drip Rate
Table 2: Pump On/Off conditions Status OK LED on OK LED off • Drip rate greater than 15 dpm • Drip rate less than 15 dpm Pump on • O.K. relay contacts are closed • Total lack of oil (OIL LED on) •...
Page 13: Section 3: Operation
Section 3: Operation Controls and Indicators Button and indicator locations on the Dripmaster control panel are shown below. Dripmaster window Presence of oil Pre-lube (pump off) mode area Drip rate Lack of oil Valve opening Display switch Open Valve Valve fully open Freeze Control Mode 12-second timer...
Page 14 Item Name Control or Function number Indicator (Figure 6) Green LED Indicates that sufficient oil is delivered whether the well pump is on or off. In the Normal (pump on) mode, this corresponds to oil drip rates in excess of 15 dpm.
Page 15 Item Name Control or Function number Indicator (Figure 6) Drip Rate Toggle switches Sets the drip rate for the pump-on mode. Choose only one toggle switch, and push it up to the desired dpm value. Timing Toggle switches These switches are set according to the section "Setting Normal (pump on) Mode Drip Rates", starting on page 16.
Page 16: Automatic Control
Automatic Control When the Control Mode toggle switch SW17 is in the lower AUTO position (item 8 in Figure 6), 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 2 drips/minute or more than the preset value.
Page 17: Pre-Lube (Pump Off) Mode
35 dpm toggle switch setting 20 25 30 35 40 8 10 40 dpm toggle switch setting 20 25 30 35 40 8 10 The OPEN and CLOSE LEDs indicate whether the needle valve is opening or closing. See items 5 and 11 in Figure 6 on page 13.
Page 18: Resetting The Dripmaster
Internal solenoid Oil outlet Drip verification peephole Figure 7: 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.
Page 19: Section 4: Theory Of Operation
SCADA interface. The Dripmaster EDD-4C incorporates a specially-designed needle valve connected to a servo motor which automatically compensates for rate fluctuations. The compensation magnitude is defined by the control circuitry.
Page 20: Figure 9: Dripmaster Functional Diagram
Other dry contacts in the Dripmaster are available to transmit the drip rate, and for warning of a total lack of oil condition. The Dripmaster EDD-4C contains two drip rate settings, depending on the mode of operation: • Normal (pump on) mode—the following values are selectable: •...
Page 21: Search Feature
Overflow/vent hose Drip verification peephole Figure 10: Dripmaster EDD-4C Needle Valve Assembly When and if oil drops are detected, the search function stops, and normal stabilization resumes. If no drops are detected while the needle valve is closing, then the needle valve eventually reaches its...
Page 22: Push-Down And Push-Up Features
lower limit and the OIL LED lights continuously. The LL relay outlet contact closes, transmitting a total lack of oil condition. At this stage, there is no vertical line-shaft lubrication which means that either the oil tank is empty or there is an oil flow blockage between the oil tank outlet and the Dripmaster inlet.
Page 23: Section 5: Maintenance And Troubleshooting
Section 5: Maintenance and Troubleshooting Table 4: Routine Maintenance Task Frequency Check for oil leaks Monthly Oil filter change (the oil filter used can be an Every six months automotive fuel filter with ¼" fittings) Check for normal operation Weekly •...
Page 24 Problem Possible Cause Solution • Oil tank is empty • Refill the oil tank The OIL LED is on. • A shut-off valve at the outlet of • Open the shut-off valve the oil tank might be closed • Change the oil filter, or clean out •...
Page 25: Section 6: Specifications
Section 6: Specifications Table 6: Dripmaster EDD-4C specifications Power requirements 115 VAC, 10 VA, or 24 V AC/DC 220 VAC, 10 VA or 24 V AC/DC Normal (pump on) mode preset drip rates 20, 25, 30, 35, 40 dpm Pre-lube (pump off) mode drip rate...
Page 26: Overall Dimensions
Overall Dimensions Oil inlet 1/4 inch BSP 1/4-inch screws (8 places) Display window Drip verification peephole Connection Oil outlet 1/4 inch BSP Control cable entry Power cable entry Figure 11: Dripmaster dimensions The Dripmaster enclosure is made of painted, cast aluminum.
Page 27: Section 7: Dripmaster Service Policy
Section 7: Dripmaster Service Policy This policy has been established to cover the servicing of Hoffmann & Hoffmann products, regardless if it is within or beyond the warranty period. Installation 1. The installation services required for the Dripmaster includes the following: Infrastructure (trench digging, cable laying) Oil tank stand Dripmaster mount...
Page 28: Product Within The Warranty Period
Product within the Warranty Period 1. All Hoffmann & Hoffmann products have a one year limited warranty. 2. Hoffmann & Hoffmann Warranty will apply only to units installed by authorized Rep/Distributors or by the customer (if Hoffmann & Hoffmann authorized installation by the customer). 3.
Page 29: Terms & Conditions On Reverse
2. Return properly packaged item to the address of your local Rep/Distributor or to Hoffmann & Hoffmann lab. 3. This warranty is limited to the repair or replacement of the Hoffmann & Hoffmann products only. Hoffmann & Hoffmann assumes no other responsibility or liability. 4.