Geotech AR4 Series User manual

Rev 3/31/2020 Part # 16600115
AR4
4”Auto-Reclaimer
Installation and Operation Manual

2
Table of Contents
Section 1: System Description................................................................................... 3
Function and Theory.............................................................................................. 3
System Components............................................................................................. 4
Section 2: System Installation.................................................................................... 5
System Schematic................................................................................................. 6
Pump Activation Levels......................................................................................... 8
Air Consumption.................................................................................................... 9
Airline Supply Pressure Drops ............................................................................ 10
Deploying Multiple Pumps................................................................................... 11
Section 3: System Operation................................................................................... 13
Section 4: System Specifications............................................................................. 14
Performance Curves: AR4 Short Series ............................................................. 15
Performance Curves: AR4 Long Series.............................................................. 17
Performance Curves: AR4 EXT Series............................................................... 19
Section 5: Replacement Parts................................................................................. 22
AR4 Replacement Parts List ............................................................................... 22
Replacement Parts Diagram ............................................................................... 23
Section 6: System Maintenance .............................................................................. 25
Maintenance Schedule........................................................................................ 25
Maintenance Operations ..................................................................................... 25
Required Tools................................................................................................ 25
Supplies*......................................................................................................... 25
Disassembly Instructions..................................................................................... 26
Housing and Bottom Cap................................................................................ 26
Retainer and Float........................................................................................... 27
Control Rod/ Valve Assy................................................................................. 28
Section 7: System Troubleshooting......................................................................... 29
Appendix A –System Specifications - Metric........................................................... 31
Performance Curves: AR4 Short Series - Metric ................................................ 31
Performance Curves: AR4 Long Series - Metric................................................. 33
Performance Curves AR4 EXT Series- Metric.................................................... 35
Air Consumption- Metric...................................................................................... 37
Air Supply Pressure Drops –Metric.................................................................... 38
Discharge Trunkline Sizing –Metric.................................................................... 40
The Warranty........................................................................................................... 42
Equipment Return Policy ......................................................................................... 42
Equipment Decontamination.................................................................................... 42

3
Section 1: System Description
Function and Theory
The Geotech 4" Auto-Reclaimer
(AR4) is an automatic and
controller-less, positive air-
displacement pump that works
without the use of any external
controls, relays, bleeder tubes
or bubblers. The AR4 requires only
a regulated standard industrial
compressed air source to operate.
The AR4 is a fixed intake,
Automatic total fluids recovery
pump which can recover fluids
from depths of up to 250’(76.2 m).
Based on specific site requirements,
the AR4 is offered in three lengths:
short, long, and extended (Ext)
each of which can be ordered to
accommodate fluid intake with a
top screen inlet, a 4” (10 cm) bottom screen,
a flat bottom screen, or any combination
of top and bottom. Intake screens
allow for pumping fluid with up to
1/8” diameter suspended particles.
The AR4 can also operate under
both positive and *negative (vacuum)
pressure environments. The pump
is designed to self-adjust the discharge
flow rate automatically to match
individual well recharge rates (up to
the pumps maximum flow rate
based on individual site conditions).
*Vacuum conditions may require
a Vacuum Equalizer if venting out
of the recovery well. Contact your
Geotech Technical Sales representative
for more information.
Only
Inlet
Bottom Fill
Figure 1-1: Auto Reclaimer 4

4
System Components
The AR4 pump series models all share the same internal mechanics and pump options.
Figure 1-2 below shows the major components to an AR4.
*Housing not shown Figure 1-2: AR4 model: 86600149 –AR4,SHORT,T&4”B

5
Section 2: System Installation
Attach the Air (A), Vent (V), and Discharge (D) hoses/tubing to their appropriate labeled
fittings (see Figure 2-1). Ensure all hoses are installed securely and completely. Top filling
AR4 pump models have a screened inlet in the Fill (F) port; bottom fill only pumps will have
this port plugged.
Attach the pump suspension cable to the safety cable harness and lower pump into well.
Suspension cable should be centered with the pump head and not wrapped around any of
the fittings or tubing.
Lower the pump into the well so that the appropriate intake(s) becomes submerged below
static groundwater conditions.
Figure 2-1: Pump Head

6
System Schematic
Figure 2-2: Single Pump System Schematic
* Air Regulators should be
mounted vertically and as
close to the compressor as
possible.

7
Figure 2-3: System Schematic with Multiple Pumps
**Be aware of pressure
drops when deploying
multiple pumps or longer
lengths of tubing.

8
Pump Activation Levels
The AR4 is offered in three pump lengths. Activation levels vary depending on inlet options
and pump length. Fluid submergence levels will trip valve mechanics when pumping fluid
reaches approximately three quarters the length of the float. Measurements below are shown
with a bottom screen. Adjust measurements by reducing 5” (13 cm) if using a flat bottom
intake or top fill only AR4.
PUMP DIMENSIONS
SHORT
LONG
EXT
MIN SUBMERGENCE (BOTTOM FILL)
35" (89 cm)
47" (119 cm)
59" (150 cm)
MIN SUBMERGENCE (TOP FILL)
42.5”(108 cm)
54.5" (138.43 cm)
66.5" (169 cm)
PUMP LENGTH
48" (122 cm)
60" (153 cm)
72" (183 cm)
Figure 2-3: Submergence Levels for Pump Activation

9
Air Consumption
(See Appendix A for metric conversions)
Depending on site conditions, Figure 2-4 below estimates pump air consumption.
Figure 2-4: Air Consumption

10
Airline Supply Pressure Drops
(see Appendix A for metric conversions)
Airline Supply Pressure Drops (continued)
Figure 2-6: Airline Pressure Drop at 70PSI

11
Airline Supply Pressure Drops (continued)
Figure 2-7: Airline Pressure Drop at 100PSI
Deploying Multiple Pumps
(see Appendix A for metric conversions)
When installing multiple pump lines over extended distances, proper pipe sizing on the
discharge side needs to be considered to ensure pressure drop along trunkline does not
exceed the pressure available from pump source. Please use Figure 2-7 below as a
reference only. Numbers provided were calculated for water flowing through plastic piping.

12
Figure 2-8: Trunkline Sizing 15PSI Pressure Drop

13
Section 3: System Operation
The AR4 pump is lowered in a recovery well so that the fluid intake (top, bottom or dual fill)
are sufficiently submerged below the static groundwater level. Provided with a regulated air
supply, the pump cyclically fills and empties. As the pump fills, the internal float assembly
rises until engaging the control lever that operates the valve mechanism. When the control
lever shifts up, the air valve opens and the pump begins to pressurize, closing any inlet
check valves and displacing fluid out the discharge pipe. As the water is discharged from the
pump, the float assembly lowers, shifting the control lever down and closing the air supply
valve and opening the vent valve. The pressurized air exits through the air exhaust tube,
allowing the pump to refill and begin a new cycle. This cyclic operation continues
automatically as fluid is drawn into the well. Regulated compressed air is utilized in this
system as an on demand supply.
Figure 3-1: Pump cycle
Discharge
Fill

14
Section 4: System Specifications
Table 4-1: Physical Specifications
Short Pump
Long Pump
Extended Pump
Fluid Inlet
Top
Bottom
Top
Bottom
Top
Bottom
Diameter
3.5” (8.9 cm)
Length
44”
(112 cm)
48”
(122 cm)
56”
(142 cm)
60”
(152
cm)
68”
(173 cm)
72”
(183 cm)
Weight
13.5 lbs (6 kg)
15.6 lbs (7 kg)
17.7 lbs (8 kg)
Maximum Depth
250’ (76.2 m)
Actuation Level
42.5”(108
cm)
35”
(30-89 cm)
54.5”
(138.43 cm)
47”
(120
cm)
66.5”(169
cm)
59”
(150 cm)
Air Pressure
10 - 120 PSI Max (0.7 –8.5 Kg/cm²)
Air Consumption
0.25 - 1.25 SCF/GAL (1.5-9.5 STD L/Liter)
Fluids
Landfill leachate,diesel, gasoline, JP1, JP6,#2 heating oils, BTEX, MTBE*
pH Range
4-9
Max. Temperature
220°F (104°C)*
Min. Density
0.7 SpG
*HDPE parts may require increased maintanence at higher concentrations and /or temperatures
Table 4-2: Fitting Sizes and Materials
Tube & Hose Fittings
Pump Materials
Fitting sizes on pump head
Pump housing/body
FRP
Air - NPT/Hose Barb
3/8”/ 3/8”
Pump ends
SS316
Vent - NPT/Hose Barb
3/8”/ 1/2”
Internal Component
SS316, PVDF,
FPM, HDPE
Discharge - NPT/Hose Barb
3/4”/ 3/4”
Bottom Intake
HDPE
Top Fill - NPT
1”
Top intake check ball
PTFE
Tube Fitting Type
Hose barbs or
optional Quick
Connectors (QCon)
Bottom intake check ball
HDPE
Tube or Hose Fittings
Brass / Stainless
Steel
Discharge check ball
PTFE
Liquid discharge tubing ID
3/4”
O-ring seals
FPM
Air supply tubing ID
3/8”
Air inlet check ball
FPM
Vent / Air exhaust tubing ID
1/2”
Vent Seat
FPM
Tubing and Hosing Material
Multiple available -
Contact your
Geotech Sales
Representative
Float
HDPE
Top Intake Material
PVDF
Control Rod
PVDF
Valve Manifold
PVDF

15
Performance Curves: AR4 Short Series
(see Appendix A for metric conversions)
Information below is for estimation purposes only. Performance will vary with site specifics.
Flow is measured in Gallons Per Minute (GPM).
Figure 4-1: AR4 Short Bottom/Top Inlet, 6” (15 cm) Submergence, 3/4" (19 mm) ID Hose in
GPM
Figure 4-2: AR4 Short Bottom/Top Inlet, 2’ (60 cm) Submergence, 3/4" (19 mm) ID Hose in
GPM

16
Performance Curves: AR4 Short Series (continued)
Figure 4-3: AR4 Short Bottom/Top Inlet 4’ (1.2 m) Submergence, 3/4" (19 mm) ID Hose in
GPM
Figure 4-4: AR4 Short Bottom/Top Inlet 10’ (3 m) Submergence, 3/4" (19 mm) ID Hose in
GPM

17
Performance Curves: AR4 Long Series
(see Appendix A for metric conversions)
Information below is for estimation purposes only. Performance will vary with site specifics.
Flow is measured in Gallons Per Minute (GPM).
Figure 4-5: AR4 Long Bottom/Top Inlet 6” (15 cm) Submergence, 3/4" (19 mm) ID Hose in
GPM
Figure 4-6: AR4 Long Bottom/Top Inlet 2’(60 cm) Submergence, 3/4" (19 mm) ID Hose in
GPM

18
Performance Curves: AR4 Long Series (continued)
Figure 4-7: AR4 Long Bottom/Top Inlet 4’ (1.2 m) Submergence, 3/4" (19 mm) ID Hose in
GPM
Figure 4-8: AR4 Long Bottom/Top Inlet 10’ (3 m) Submergence, 3/4" (19 mm) ID Hose in
GPM

19
Performance Curves: AR4 EXT Series
(see Appendix A for metric conversions)
The EXT pump requires less maintenance compared to other models, cycles more fluid
volume per duty cycle, and has a longer service life.
Information below is for estimation purposes only. Performance will vary with site specifics.
Flow is measured in Gallons Per Minute (GPM).
Figure 4-9: AR4 EXT. Bottom/Top Inlet 6” (15 cm) Submergence, 3/4" (19 mm) ID Hose in
GPM
Figure 4-10: AR4 EXT. Bottom/Top Inlet 2’ (60 cm) Submergence, 3/4" (19 mm) ID Hose in
GPM