Pulsafeeder Pulsar DLCM - Manual (Page 112)

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13. General Repairs
The DLCM contains no user-serviceable components within its main enclosure. In the un-likely event that
your DLCM needs to be repaired, PULSAFEEDER has implemented a replacement program. Fill out the
Diagnostic form included in the back of this manual, then contact PULSAFEEDER Customer Service at
(585) 292-8000 to enter a replacement order
Within 24-hours a DLCM will be shipped to you in a returnable container. Remove the replacement
DLCM from the packaging and swap it with the DLCM needing repair. Return the DLCM in the same
packaging within
30 days . Make sure that there are no components missing from the returned unit – you
will be charged accordingly. Upon receipt of the unit at PULSAFEEDER, an evaluation will be made
within
14 days . The unit returned will be refurbished for use in the replacement program.
The DLCM has been designed to allow you to replace a defective unit without disturbing the wiring and
conduit. The replacement unit will be shipped with the conduit adapter and attached field wiring board
(refer to Figure 2). It is left to your discretion as to whether or not these components are used for the
replacement. (Typically, these are left attached to the wire/conduit and form a 'plug' for the replacement
unit.) When the original unit is returned to PULSAFEEDER, the unused conduit adapter (“new or
“original”) must be attached to the original unit.
13.1 Emergency Manual Pulsar Operation
If your DLCM is not functioning, you can operate your PULSAR manually without removing the DLCM.
Follow this procedure:
1. Remove power from the DLCM.
2. Replace the DC motor with an AC motor or drive the DC motor with an external SCR drive.
3. Start the motor.
T
HE
PULSAR
MOTOR WILL START IMMEDIATELY
! T
AKE ALL NECESSARY
S
AFETY
PRECAUTIONS .
4. Rotate the manual adjustment knob on the DLCM clockwise to zero the pump. It will be difficult to
rotate as you are back-driving the DLCM stroke adjustment motor. Be careful! Do not force the knob.
Try to turn it in both directions to get a feel for the back-drive torque. As you approach zero the
knocking will diminish.
5. Once you have found zero, mark the knob and the DLCM cover with pieces of tape to use as a position
reference.
6. You can set the stroke adjustment to a specific value by calculating the number of knob turns. To do
this, divide the desired setting (%) by a factor of 4 (%/rotation). For example, say your desired setting
was 67%. You would divide 67 by 4 which equals 16.75. So you would turn the knob 16 and 3/4
revolutions in a counter-clockwise direction from the zero position.