Geotech 12 Volt DC Controller

Geotech_12_Volt_DC_Controller

User Manual: Pdf Geotech 12 Volt DC Controller

Open the PDF directly: View PDF PDF.
Page Count: 17

Rev. 2 6/12/02 Part # 11201014
12 VDC
Controller
INSTALLATION AND OPERATION MANUAL
1
TABLE OF CONTENTS
Chapter 1: System Description................................................................. p. 05
Function and Theory.............................................................................. p. 05
Chapter 2: System Installation.................................................................. p. 06
Chapter 3: System Operation ................................................................... p. 07
Chapter 4: System Maintenance .............................................................. p. 09
Chapter 5: System Troubleshooting ......................................................... p. 10
Chapter 6: System Specifications............................................................. p. 11
Chapter 7: System Schematic .................................................................. p. 12
Chapter 8: Replacement Parts List........................................................... p. 13
Warranty and Repair.................................................................................. p. 16
2
NOTE
DOCUMENTATION CONVENTIONS
This manual uses the following conventions to present information:
An exclamation point icon indicates a
W
ARNING
of a situation or condition that could lead to
personal injury or death. You should not proceed
until you read and thoroughly understand the
WARNING message.
A raised hand icon indicates
C
AUTION
information
that relates to a situation or condition that could
lead to equipment malfunction or damage. You
should not proceed until you read and thoroughly
understand the CAUTION message.
A note icon indicates
N
OTE
information. Notes
provide additional or supplementary information
about an activity or concept.
WARNING
CAUTION
3
In order to ensure that your 12 VDC Controller has a long service life
and operates properly, adhere to the cautions below and read this
manual before use.
• Controller power input source must not exceed maximum ratings.
• Controller must be wired to a negative ground system.
• To prevent controller damage, never connect controller power
leads directly to an un-fused battery.
• Controller may not operate properly with excess wiring not
supplied by manufacturer.
• Avoid spraying fluid directly at controller.
• Never submerge controller.
• Avoid pulling on wires to unplug controller wiring.
• Avoid using controller with obvious physical damage.
• To prevent controller damage, avoid dropping controller.
4
12 VDC CONTROLLER
Figure 1
5
Chapter 1: System Description
Function and Theory
The 12 VDC Controller is a unique control for operating down well sampling
pumps. The control offers variable speed control and cycle timer for
controlling the pump on time and off time. This feature is important for pumps
that can not be run continually.
The 12 VDC Controller also incorporates a dry well detection feature to
prevent running the pump dry should the fluid level in the well drop below the
pump level. This feature is enabled at speed settings above 50% to prevent
pump seal damage.
Consult the operation/installation manual of specific 12 VDC
submersible pump before attaching to controller. Do not
exceed maximum amperage output ratings of the controller.
6
Chapter 2: System Installation
To operate the Geotech 12 VDC controller, make sure the controller power
switch is in the off position and plug the power input cord into a 12V lighter
receptacle on a negatively grounded system. If the controller is to be wired
directly to a 12V battery, make sure to connect the positive alligator clip to
the positive battery terminal. Continue by plugging the pump power
receptacle into the controller 12V power output jack and finally connect all
required plumbing. Check all wiring and plumbing for correctness.
Figure 2 – Installation Diagram
7
Chapter 3: System Operation
Adjust the controller on and off timer knobs to the desired cycle times. These
adjustments are read only during the start of an on or off cycle. For this
reason, if either timer adjustment knob is changed while the controller is in
that mode of operating, the new timer value will not be valid until the start of
the next timer cycle. Adjust the speed controller knob to somewhere near the
middle of the scale. Turn the controller power switch on. The pump unit
should begin pumping fluid. Slowly adjust the speed control knob to get the
desired flow rate out of the pump.
The controller dry well function detects if the pump is pumping fluid. If the
pump is started in a dry condition or if the pump goes dry during a pump
cycle, the pump is stopped for 60 seconds after which time the pump run
cycle is automatically restarted. The dry well function has been designed to
protect the pump seals at high pump speeds and works in the speed control
setting range from 5 to 10.
By setting the controller off cycle time to zero, continuous pumping is
possible. Some pumps are not designed to run continuously and to prevent
damage to the pump, never exceed the recommended cycle rates for the
pump.
Turning the controller power switch to the off position for a minimum of three
(3) seconds and then back on will reset the controller timers or any faults.
Failure to cycle power off for the minimum recommended time might result in
improper controller reset.
LED STATUS CODES:
GREEN Pump running.
FLICKER GREEN Pump off time.
FLICKER RED Dry well condition.
RED Drive fault.
FLASH RED Low input supply voltage.
For convenience, these LED codes are printed on a label on the back of the
12 VDC Controller. See figure 3.
8
Figure 3
9
Chapter 4: System Maintenance
Unit must be returned to Geotech for any service.
In order to provide long service life, keep the 12 VDC Controller clean. Clean
controller by wiping off with a mild detergent. Apply cleaning solution to a
soft cloth and wipe off the controller. Avoid soaking or directly spraying
liquids on the 12 VDC Controller.
10
Chapter 5: System Troubleshooting
The Geotech 12 VDC controller has been designed and manufactured to
provide a long service life and trouble free operation in the field. The dry well
detection system incorporated in this controller has been optimized to work
with a Geosquirt sampling pump with 60’ Motor Lead. Other pump
configurations may be used with the 12 VDC Controller, provided the
substitute pump power level and current draw closely matches that of the
Geosquirt two stage pump with 60’ Motor Lead. If you seem to be having
trouble with the dry well feature, please try the following to determine if the
12 VDC controller is the problem or if there is a problem with your pump.
To check your Geotech two stage pump for proper operation, submerse the
pump into water and plug the pump directly into a 12 VDC power supply
capable of outputting at least 15 Amps, bypassing the 12 VDC Controller
completely. If no power supply is available, a fully charged 12V car batter
may be substituted. Make certain that the pump has standard length (60’) 16
AWG power cord attached to it. To verify that both stages of the pump are
working, it is necessary that the current draw of the pump be measured.
Connect an Amp meter in series with the pump and note the current draw. If
both stages of the pump are properly operating, the current draw should be in
the range of 6-8 Amps. A current draw around half this value, 3-4 Amps, will
indicate that one stage of the pump unit has failed and hence the pump unit
should be replaced. Attempting to run a failed pump with the 12 VDC
Controller can result in the dry well function inadvertently tripping.
Also, Geotech does not recommend changing the stock 60’ #16 AWG motor
pump wiring to a different length or gauge of wire. Doing so may result in
inadvertent dry well tripping.
Other sources of low pump output or inadvertent dry well shut downs may be
the 12V lighter receptacles. Make certain these connections are fully
plugged in. Once fully plugged in, rotating the connection can help if there is
a dead spot in the connector.
11
Chapter 6: System Specifications
Power 150W
Vin 8 -18VDC
Volt Range 0 to Vin – 1 VDC
Volt resolution 50mVDC
lout continuous 14A
lout fault 15A
lin standby 50mA
lin typical 12A@ 12.5Vin
On timer range 30 sec to 30 minutes
Off timer range 30 sec to 30 minutes
Dry well off time 60 sec
Dry well detection 50-100%
Power off min time (reset time) 3 sec
Time resolution 7 sec
Accuracy ± 15 sec
Efficiency >94%
Storage temp -20°C to 85°C
Operational temp -20°C to 50°C
FEATURES
Over current and motor fault protection.
Variable speed control.
Variable on time.
Variable off time.
Dry well short cycle mode.
Software watchdog.
Hardware watchdog.
Advanced PWM motor drive.
1. For use with negative (-) ground systems only.
2. Switching power on off on without observing minimum reset off time may
result in improper control reset.
3. A maximum 25-amp fuse must exist in line between the control and main
power source.
12
Chapter 7: System Schematic
13
Chapter 8: Replacement Parts List
12 VDC Controller PN 81201004
Purge Pump Pigtail 81201000
60’ 81201001
Reel 81201002
30’ 81201005
Knobs 11150146
Switches 11201015
Power Cord 51350006
14
Notes
15
Notes
16
The Warranty
For a period of one (1) year from date of first sale, product is warranted to be
free from defects in materials and workmanship. Geotech agrees to repair or
replace, at Geotech’s option, the portion proving defective, or at our option to
refund the purchase price thereof. Geotech will have no warranty obligation
if the product is subjected to abnormal operating conditions, accident, abuse,
misuse, unauthorized modification, alteration, repair, or replacement of wear
parts. User assumes all other risk, if any, including the risk of injury, loss, or
damage, direct or consequential, arising out of the use, misuse, or inability to
use this product. User agrees to use, maintain and install product in
accordance with recommendations and instructions. User is responsible for
transportation charges connected to the repair or replacement of product
under this warranty.
Equipment Return Policy
A Return Material Authorization number (RMA #) is required prior to return of
any equipment to our facilities, please call 800 number for appropriate
location. An RMA # will be issued upon receipt of your request to return
equipment, which should include reasons for the return. Your return
shipment to us must have this RMA # clearly marked on the outside of the
package. Proof of date of purchase is required for processing of all warranty
requests.
This policy applies to both equipment sales and repair orders.
FOR A RETURN MATERIAL AUTHORIZATION, PLEASE CALL OUR
SERVICE DEPARTMENT AT 1-800-833-7958 OR 1-800-275-5325.
Model Number: ________________
Serial Number: ________________
Date: ________________
Equipment Decontamination
Prior to return, all equipment must be thoroughly cleaned and
decontaminated. Please make note on RMA form, the use of equipment,
contaminants equipment was exposed to, and decontamination
solutions/methods used.
Geotech reserves the right to refuse any equipment not properly
decontaminated. Geotech may also choose to decontaminate equipment for
a fee, which will be applied to the repair order invoice.

Navigation menu