Hoffmann&Hoffmann Dripmaster EDD-4C User manual

Copyright ©2015 Hoffmann & Hoffmann Ltd. Rev. 11, December 2015
1
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.

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

3
Contents
Section 1: Introduction ............................................................................................................................... 5
Overview .......................................................................................................................................... 5
Section 2: Installation ................................................................................................................................. 6
General............................................................................................................................................. 6
Well Site Requirements.................................................................................................................... 6
Installation Kit................................................................................................................................... 8
Mounting the Dripmaster.................................................................................................................. 8
Wiring the Power and Control Cables.............................................................................................. 9
Setting the Drip Rate...................................................................................................................... 12
Section 3: Operation ................................................................................................................................ 13
Controls and Indicators .................................................................................................................. 13
Resetting the Dripmaster ............................................................................................................... 15
Automatic Control........................................................................................................................... 16
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 within the Warranty Period ............................................................................................... 29
Product Out-of-Warranty Period .................................................................................................... 29
Return Instructions ......................................................................................................................... 29
Terms & Conditions on reverse ..................................................................................................... 30

4
List of Figures
Figure 1: Dripmaster EDD-4C............................................................................................................... 5
Figure 2: Installation requirements ....................................................................................................... 7
Figure 3: Dripmaster—rear view showing mounting centers................................................................ 8
Figure 4: Connection box – cable routing............................................................................................. 9
Figure 5: Connection box – electrical terminals: 115 VAC unit shown................................................. 9
Figure 6: Connection box PCB – wiring diagram................................................................................ 10
Figure 7: Dripmaster control panel ..................................................................................................... 13
Figure 8: Dripmaster 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 indicators................................................................................. 13
Table 4: Routine Maintenance............................................................................................................ 23
Table 5: Troubleshooting .................................................................................................................... 23
Table 6: Dripmaster EDD-4C specifications .......................................................................................25
Table 7: Oil volume fed to line shaft ................................................................................................... 25

5
Section 1: Introduction
Overview
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. This is achieved by monitoring 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 provides:
•Accurate oil consumption data (drip rate count)
•Total lack of oil warning
•Automatic pump shutdown
A built-in manual mechanism ensures oil flow even in the remote possibility of unit malfunction.

6
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 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.

7
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.
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

8
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.
Mounting the Dripmaster
1. In order to mount the Dripmaster, drill four 1/4-inch holes in the metal 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 device to the metal plate using the remaining nuts and lock washers.
9.45 inches (240 mm)
4.33 inches
(110 mm)
For ¼”
mounting bolts
Figure 3: Dripmaster—rear view showing mounting centers

9
Wiring the Power and Control Cables
Power and control cables are routed through the bottom of the connection box through two strain
relief bushings.
Power cable entry Control cable entry
Green ground wire
connects here
Figure 4: Connection box – cable routing
Wire the connection 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. relay
contacts.
Figure 5: Connection box – electrical terminals: 115 VAC unit shown

10
24V DC/AC
24VAC/DC
S.B.
LL
PULSE
O.K.
L
N
{
{
{
{
24V DC/AC
Control
cable
Optional
power
cable
115/220 VAC
115/220 VAC
O.K.
J2
Figure 6: Connection box PCB – wiring diagram
Note: Line voltage is either 115 VAC, 60 Hz or 220 VAC, 50 Hz. The unit can be powered by line
voltage or optionally by 24 V (DC or AC).
Note: Each of the signals associated with the control signal terminal block are not polarity dependent
(24VAC/DC, S.B., 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 green ground wire to a chassis screw or bolt, preferably using a ring terminal. See
Figure 4.
4. Route the control cable through the right cable strain relief (Figure 4).
5. Connect control cable according to Table 1.