Hoffmann&Hoffmann Dripmaster EDD-4C, User Manual

Page: 14 / 32

14
Item
number
(Figure 7)
Name Control or
Indicator Function
2
OK
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.
In the Pre-lube (pump off) mode, the LED
lights when the rate is between 1 and 15
dpm. The LED is off when a total lack of oil
condition occurs, and the
OIL LED lights.
A corresponding relay contact closes when
the
OK LED is on. The terminal for this
contact is called O.K. and appears in Figure 5
on page 9. This terminal can be used to
directly turn off the well pump in the Normal
(pump on) mode, when drip rates are less
than 15 dpm.
3
SB
Yellow LED Lights in the Pre-lube (pump off) mode when
24 V DC/AC is applied to the S.B. terminals in
the connection box. The drip rate in this mode
is always 2 dpm.
4 DRIP Yellow LED This LED flashes whenever a drop passes
the 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 shorten
the time to reach the preset drip rate.
7 UL Yellow LED Lights when the valve is completely open.
8 Control mode SW17 Toggle switch Select between manual and automatic
operation:
•
Manual (MAN): for emergency use only. In
this state, you can only open or close the
needle valve manually by pressing the
close valve or open valve push buttons.
•
Automatic (AUTO): the Dripmaster should
always be in this mode for full Dripmaster
functionality.
9 Manual Mode Yellow LED Lights in the manual mode—when the mode
switch (item 8) is in the up position
10 Close Valve SW18 Push button Press to manually close the valve—for
troubleshooting, and can be used to shorten
the time to reach the preset drip rate.