Bennett CNG Series User manual

120950 Rev B 08-2-13
READ THIS BOOK This book has important
information for safe installation and operation of this
equipment. Read and understand this book before
applying power. Keep this book and tell all service
personnel to read this book. If instructions are not
followed then bodily injury, death or damage to the
equipment could transpire.
For new books, visit our web page at:
http://www.bennettpump.com
Bennett CNG Series
CNG Series Remote Dispensers
Installation Manual
Only Trained Personnel May Work on This Equipment
Bennett 1218 E. Pontaluna Road, Spring Lake, MI 49456
USA 800-235-7618 ~ Outside USA 231-798-1310
[email protected] ~ www.bennettpump.com

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Safety Instructions....................................................................................................................................3
Product Specifications..............................................................................................................................4
Power Requirements .........................................................................................................................4
Environmental Requirements............................................................................................................. 4
Dimensions ........................................................................................................................................4
General Installation Information ...............................................................................................................4
Underground Installation Requirements...................................................................................................4
CNG Dispenser DIN.................................................................................................................................5
Pipelines and Containment Sumps..........................................................................................................6
How to Lift & Transport.............................................................................................................................6
Base Dimension .......................................................................................................................................7
Mechanical Installation Requirements......................................................................................................8
Pipeline Installation...................................................................................................................................8
(Purging System) Blower..........................................................................................................................9
Determining the number of wires needed ................................................................................................10
General Wiring Instructions......................................................................................................................11
Beginning the Wiring Process............................................................................................................11
Instructions for Earth Grounding the Equipment......................................................................................12
AC Power Installation...............................................................................................................................12
Electronic Power Connections...........................................................................................................12
Rules to Ensure Proper Installation ...................................................................................................12
Data Communication Wiring.....................................................................................................................13
Current Loop Fuel Wire Termination (1 Sided and 2 Sided) ............................................................. 13
RS-485 Fuel Wire Termination (White Terminal Block).....................................................................13
RS-485 Card Reader Wire Termination (Power Distribution Board TS4) .........................................13
Battery ......................................................................................................................................................14
Installing the Wire Separator....................................................................................................................14
Dispenser Start-Up and Checklist............................................................................................................15
Final Installation Checklist........................................................................................................................16
Field Wiring and Communication Diagram - Current Loop ...................................................................... 17
Current Loop Notes............................................................................................................................18
Field Wiring and Communication Diagram - RS-485...............................................................................19
RS-485 Notes.....................................................................................................................................20
How to Electronically Calibrate (E-Cal) the Dispenser.............................................................................21
Bennett Warranty......................................................................................................................................22
Site Audit Form.........................................................................................................................................24
NOTICE
This device complies with part 15 of the FCC rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interface, and (2) this device must accept in-
terference received, including interference that may cause undesired operation.
Not all equipment covered in this manual is listed by Underwriters Laboratories.
IMPORTANT
Examine the shipment immediately upon arrival to make certain there has been no damage or loss in
transit. Bennett Pump Company, as shipper, is not liable for the hazards of transportation. Please make
damage claims directly to the truck line.
Table of Contents

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CAUTION: Do not drill holes in dispensers.
Holes can cause failure of the electronic
equipment. The warranty will become void. Use
only adhesive backed sign mounting brackets.
READ AND UNDERSTAND ALL WARNING LABELS ATTACHED TO THE DISPENSER
Safety Instructions
DANGER: Fire, explosion, injury or death
will occur if filters are changed by untrained
personnel. Make sure only trained personnel
change filters.
WARNING: When anchoring the dispenser,
always level the dispenser with shims before
bolting to the island. DO NOT shim just the
middle of the dispenser and bolt down.
WARNING: Make sure this equipment is
correctly grounded. Failure to do will cause
injury or damage equipment or improper
operation. Improper grounding voids the
warranty.
WARNING: Training is needed in the
operation and programming of this dispenser
before using it. READ THE OPERATORS
MANUAL.
WARNING: The shut-off ball valve for the
incoming CNG Line must be closed when
service or maintenance is performed on this
equipment.
WARNING: Electronic components are
static sensitive. Use proper static precautions
(static straps) before working on the equipment.
WARNING: To prevent electric shock, keep
the electrical parts of the dispenser dry.
WARNING: Training is needed in the
installation, service or maintenance of this
equipment (dispenser, pump, console, control
box) before working on it. Maintenance repairs
must be done by authorized personnel only.
DANGER: Disconnect all power and relieve
pressure to this equipment and associated pump
during installation, service or any maintenance,
i.e., changing filters.
DANGER: CNG is flammable.
NO SMOKING OR OPEN FLAME.
DANGER: To prevent injury from vehicles
and onlookers, always place a barrier around
this equipment before performing service or
maintenance.
WARNING ADVERTISSEMENT ADVERTENCIA
For the safe installation of this equipment, read and understand all warning and cautions. Look for these
warnings:
“DANGER” means: If instructions are not followed, severe injury or death will occur.
“WARNING” means: If instructions are not followed, severe injury or death can occur.
“CAUTION” means: If instructions are not followed, damage can occur to the equipment.
WARNING: Vehicle engine must be turned
off while dispensing product.
WARNING: No ignition source can be
within 10 feet of the dispenser.
WARNING: A portable fire extinguisher with
a rating of no less than 20-B:C must be provided
in the dispensing area.
WARNING: If the breakaway is not
provided then one must be installed that will
disengage at 150lbs.
WARNING: There must be a message near
the dispensers that says, “Natural Gas Vehicle
Fuel Cylinders shall be periodically inspected
(normally every 3 years) to ensure safe
operation of the vehicle. Contact vehicle or
cylinder manufacture.”

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POWER REQUIREMENTS
AC Power Input, Electronic.......................................................................115VAC, 60HZ @ 660W.
DC Power Supply Outputs...................................................................................+5VDC @ 5.0 Amps Max.
.........................................................................................................................+12VDC @ 1.75 Amps Max.
.........................................................................................................................+24VDC @ 2.75 Amps Max.
Lead-Acid Battery Output..................................................................................+12VDC @ 2.0 Amps Max.
Nickel-Cadmium Battery Output..................................................................+3.6VDC @ 40 Milliamps Max.
ENVIRONMENTAL REQUIREMENTS
Operating Temperature Range...........................................................................................-20°C to +40°C.
Humidity..................................................................................................................0-95% non-condensing.
DIMENSIONS
CNG Series Maximum.....................................................................*49” Wide x 22” Deep 93 3/8” High.
CNG Series Base………………………………………….............…………..43 1/2 ” Wide x 19 1/4 ” Deep.
*Without Valance.
Product Specifications
General Installation Information
Examine the shipment immediately upon arrival to make certain there has been no damage or loss in
transit. Bennett Pump Company, as shipper, is not liable for the hazards of transportation. Please make
damage claims directly to the truck line.
Examine the dispenser’s cabinet and chassis for any loose or missing fasteners that may have become
loose during transit.
Examine all fittings in the dispenser’s hydraulics for any connections that may have become loose dur-
ing transit.
Read these instructions carefully and read all tags attached to the dispenser before starting installation.
A dispenser that is not properly installed will not perform properly and will void the limited warranty.
Underground Installation Requirements
All installation specifications may vary from different locations. In all cases the installation must be in
accordance with all National Electrical Codes, State and Local Codes.
All installations must be performed by a technician who is trained and licensed in accordance to all
codes, standards and regulations.
Installation of the Bennett product and all accessories (i.e. Nozzles, Hoses and Breakaways) must be
performed by a technician who is trained and licensed in accordance to all codes, standards and regula-
tions.

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CNG Dispenser DIN

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It is extremely important to ensure that all wiring and conduits are in accordance with all local, state and
federal regulations, including, but not limited to, the National Electrical Code (NFPA 70), NFPA 30,
NFPA 30A and NFPA 52.
NOTE: U.L. requires that all electrical connections to the dispenser be made with threaded, rigid conduit
and properly sealed conductors. All dispensers and electrical connection boxes must be grounded per
NFPA 70.
PIPELINES AND CONTAINMENT SUMPS
THE ONLY FACTORY APPROVED METHOD FOR LIFTING THE CNG SERIES
How to Lift & Transport
Figure 1 - Transporting the Dispenser
* There are eyebolts included in the unit that need to be installed for transportation. To transport the
dispenser remove the bolts and install the eyebolts. Once completed re-install the bolts.
*

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Base Dimensions
Figure 2 - Dispenser Footprint

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The dispenser must be mounted on a concrete foundation. Anchor the dispenser to the island with four
(minimum 1/2”) anchor bolts through the base frame. WHEN ANCHORING THE DISPENSER, always
level the dispenser with metal shims before bolting to the island. Place the metal shims at the location
of the anchor bolts so the dispenser frame is not distorted when the anchor bolts are tightened down.
The dispenser must be bolted to the island. Do not skip this step.
Mechanical Installation Requirements
All piping must be clean of foreign debris, such as: oil, grease and shavings. All connections must be
tight to prevent leaks.
The use of a 3/4” and 1/2” Swagelok gap inspection gauge will be required to test field connections.
The Inlet (3/4”) and Return (3/4”) lines use a Swagelok fitting that must be installed with the following
guidelines:
WARNING:
 Do not bleed system by loosening fitting nut or fitting plug.
 Do not assemble and tighten fittings when system is pressur-
ized.
 Make sure that the tubing rests firmly on the shoulder of the
tube fitting body before tightening the nut.
 Use the correct Swagelok gap inspection gauge to ensure suffi-
cient pull-up upon initial installation.
 Always use proper thread sealants on tapered pipe threads.
 Do not mix materials or fitting components from various manu-
facturers—tubing, ferrules, nuts, and fitting bodies.
 Never turn fitting body. Instead, hold fitting body and turn nut.
 Avoid unnecessary disassembly of unused fittings.
 Use only long reducers in female Swagelok end connections.
Swagelok Installation:
1. Fully insert the tube into the fitting and against the shoulder; rotate
the nut finger-tight. Further tighten the nut until the tube will not turn
by hand or move axially in the fitting (see figure 3).
2. Mark the nut at the 6 o’clock position (see figure 4).
3. While holding the fitting body steady, tighten the nut one and one-
quarter turns to the 9 o’clock position (see figure 5).
On initial installation, the Swagelok gap inspection gauge assures the
installer or inspector that a fitting has been sufficiently tightened.
Position the Swagelok gap inspection gauge next to the gap between
the nut and body. If the gauge will not enter the gap, the fitting is suffi-
ciently tightened. If the
gauge will enter the gap,
additional tightening is re-
quired (see figure 6).
Pipeline Installation
Figure 3 - Swagelok tube
Figure 4 - Mark Nut
Figure 5 - Tighten Nut
Figure 6 - Swagelok gap inspection gauge (see Swagelok’s “An Installer’s Pocket Guide for Swagelok
Tube Fittings, MS-13-151 manual for further instructions.)

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It is required for the electronic enclosure of the dispenser to maintain a minimum pressure differential of
0.1 inches of water at all times. To achieve this a blower with a minimum of 65CFM air supply capability
must be installed and attached to the port at the bottom of the vapor barrier (see figure 7). When the
blower is in operation it will insure that the enclosure is purged with four volumes of air before the dis-
penser is powered and will maintain positive pressure in the enclosure. The blower must be installed at
least 5 feet away from the dispenser in an unclassified area (CNG Only). To connect the blower to the
dispenser use the 2” PVC nipple from the footprint of the dispenser to the port at the bottom of the flame
deck.
There is a switch, relay, timer and gauge (see figures 8 and 9) used to control the power of the dis-
penser. If the switch detects less than 0.1 inches of water in the electronic enclosure then the power will
be removed from the dispenser until the pressure differential returns to 0.1 inches of water.
Figure 9 - Switch & Gauge
Switch
Gauge
Figure 7 - Blower Port
Blower Port
Swagelok Reassembly:
You may disassemble and reassemble Swagelok tube fittings many times.
1. Prior to disassembly, mark the tube at the back of the nut; mark a line along the nut and fitting body
flats. Use these marks to ensure that you return the nut to the previously pulled-up position.
2. Insert the tube with pre-swaged ferrules into the fitting body.
3. While holding the fitting body steady, rotate the nut with a wrench to the previously pulled-up posi-
tion, as indicated by the marks on the tube and flats. At this point you will feel a significant increase
in resistance. Tighten the nut slightly.
WARNING: Do not use the Swagelok gap inspection gauge with reassembled fittings.
(Purging System) Blower
Figure 5 - Timer & Relay
Timer / Relay

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AC Power Wires (115VAC)
 1 x 12ga. Wire for Ground
 1 x 14ga. Wire for Hot
 1 x 14ga. Wire for Neutral
Card Reader Communication Wires - RS485
 1 x 18ga. Wire for communication (+)
 1 x 18ga. Wire for communication (common
 1 x 18ga. Wire for communication (-)
Fuel Communication Wires - Units - RS485
 1 x 18ga. Wire for communication (+)
 1 x 18ga. Wire for communication (common)
 1 x 18ga. Wire for communication (-)
Fuel Communication Wires - Current Loop
(1 sided)
 1 x 18ga. Wire for communication (+)
 1 x 18ga. Wire for communication (-)
Fuel Communication Wires - Current Loop
(2 sided)
 2 x 18ga. Wire for communication (+)
 2 x 18ga. Wire for communication (-)
(Purging System) Blower
Determining the Number of Wires Needed
Note: Prior to performing work the environment must be cleared of any hazardous gases.
Timer Board Battery Bypass
At start up the timer board will not allow the dispenser to power up until 3 minutes after a purge pressure
of .1 inches of water is reached. This is required for a complete air change in the dispenser enclosure to
eliminate any explosive gasses.
The timer board relies on a charged battery for proper operation. If the battery is discharged, the timer
will have to be bypassed via the bypass push button on the timer board. The switch will have to be held
until the battery reaches a suitable charge level. This could take several minutes. The dispenser enclo-
sure must also be closed and have a purge pressure of at least .1 inches of water for proper battery
charging.
Figure 10.4– Timer Board

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Wiring Notes: These notes are must do requirements to ensure a successful installation that
meets Bennett’s limited warranty requirements.
1. Check with Federal, State and Local Codes for conduit use in location’s area. Bennett recommends
rigid metal conduit.
2. Use only stranded wire with listed gas and oil resistant insulation. Do not use wire smaller than
listed on the Bennett wiring diagrams. For long runs increase wire size accordingly.
3. DO NOT USE WIRE NUTS ON DATA LINES. DO NOT SPLICE DATA WIRES. THEY MUST BE
DIRECT RUNS.
4. When the dispenser data wires are pulled through the underground conduit they must be terminated
at the Junction Box.
5. The wire separator (supplied with the pump) must be installed on the wires as they exit the pump
conduit before the wires are terminated to the power board. The wire separator is needed to
properly seal the conduit in the last step of installation.
6. Electronic power must be on a separate dedicated circuit breaker. Up to two dispensers may be
placed on (1) 15 amp circuit breaker.
7. WARNING: DO NOT CROSS PHASE THE DISPENSERS OR DAMAGE WILL OCCUR. This
means that the electronic power for all dispensers at the site must be on the same phase.
8. The maximum distance from the breaker panel to the dispenser is 500 feet (150m).
Beginning the Wiring Process
All dispenser wiring will be terminated directly to the Junction Box (see figure 10) and not pulled into the
electronic enclosure. The Neutral Wire must be terminated onto terminal 1 of the Timer Board and the
Hot Wire must be terminated onto terminal 2 of the Timer Board.
All data wires will be terminated onto the terminal strip. See pages
16 - 19 for wire placement.
General Wiring Instructions
Figure 10 - Junction Box

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WARNING: Failure to properly ground the equipment can cause injury or damage to the
equipment and will void the Bennett limited warranty.
This product must be properly grounded. Each dispenser requires a 12-gauge earth ground wire.
Grounding provides a path of least resistance for electric current to reduce the risk of electric shock.
Grounding is required to protect the dispenser’s computer from external electrical noise generating de-
vices. The ground wire connection must provide 1 ohm (or less) resistance to earth ground. To estab-
lish a good earth ground, follow this procedure:
1. Connect a 12-gauge (minimum), green stranded wire to the green wire in the Junction Box.
2. Pull the wire through the rigid metal conduit and connect it directly to the ground bar of the main
electrical service panel, not a sub-panel. Do NOT rely on the metal conduit as a ground. DO NOT
USE WIRE NUTS ON GROUND WIRES. USE COMPRESSION FITTINGS ONLY!
3. Do not daisy-chain ground wires. All ground circuits must be dedicated wires connected directly to
the ground bar in the main electrical panel. A direct connection to the site’s ground rod must be
connected to the ground bar in the main electrical panel.
4. Ensure that a 14-gauge minimum ground wire is connected between the dispenser ground lug and
the Power Distribution Board TS1, terminal 1. This wire must be connected for proper operation to
occur.
Each remote dispenser uses one 115V 60 Hz circuit for dispenser power. Make sure the power source
has the correct frequency and voltage. Connect the electrical circuit to the terminal strip on the power
supply board.
Electronic Power Connections:
1. Connect the White 14ga. wire in 115V circuits to Terminal 1 of the Timer Board.
2. Connect the Black 14ga. wire to the black wire to Terminal 2 of the Timer Board.
3. Electronic power must be connected to a dedicated 15 amp. circuit breaker. The dispenser is facto-
ry wired for 115V operation and may not be changed in the field. (If this is done, the warranty is
voided.) Electronic power for all dispensers at an installation must be wired to the same AC line
phase.
Rules to ensure proper operation:
1. Each dispenser uses one 115V 60 Hz circuit for dispenser power. Put no more than two (2) CNG
dispensers on a circuit breaker (for Electronic Power).
2. Do not connect any other devices or motors to these circuits.
3. Put the pump wiring in a separate conduit. Do not put non-pump related wires, such as price signs
or intercoms, in the same conduit as pump wiring.
4. Use only 14-gauge stranded gas and oil resistant THHN wire.
5. Do not use wire nuts within the dispenser or the wire run from the breaker panel to the dispenser.
WARNING: All Dispenser AC Power circuits must be on the same phase or damage could result
to the dispenser power board.
Instructions for Earth Grounding the Equipment
AC Power Installation

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Data wires are required for operation of each fueling position with a control console or
controller. The data wires can be put in the same conduit as the other pump wiring. Refer to
the wiring diagram section for additional information.
Side 1 Current Loop Fuel Wire Termination: (Power Distribution Board TS5)
1. Connect 1 Yellow 18ga. wire to the Power Distribution Board terminal 23 for side 1 negative
connection. Connect the other end to the 515 or control console position 1 negative.
2. Connect 1 Orange 18ga. wire to Power Distribution Board terminal 24 for side 1 positive connection.
Connect the other end to the 515 or control console position 1 positive.
Side 2 (if applicable) Current Loop Fuel Wire Termination: (Power Distribution Board TS5)
1. Connect 1 Yellow 18ga. wire to the Power Distribution Board terminal 25 for side 2 negative
connection. Connect the other end to the 515 or control console position 2 negative.
2. Connect 1 Orange 18ga. wire to Power Distribution Board terminal 26 for side 2 positive connection.
Connect the other end to the 515 or control console position 2 positive.
RS485 Fuel Wire Termination: (White Terminal Block)
1. Connect 1 Orange 18ga. wire to the + (positive) connection on the white terminal block located
above the CPU. Connect the other end to the Dual Fan Out Box (Interconnection Box) 1 positive.
2. Connect 1 Black 18ga. wire to the common connection on the white terminal block located above
the CPU. Connect the other end to the Dual Fan Out Box (Interconnection Box) 1 Ground.
3. Connect 1 Brown 18ga. wire to the - (negative) connection on the white terminal block located above
the CPU. Connect the other end to the Dual Fan Out Box (Interconnection Box) 1 negative.
RS485 Card Reader Wire Termination: (Power Distribution Board TS4)
1. Connect 1 Violet 18ga. wire to the power distribution board terminal 20 for the positive connection.
Connect the other end to the Interconnection Box positive.
2. Connect 1 Gray 18ga. wire to the power distribution board terminal 21 for the common connection.
Connect the other end to the Interconnection Box Gnd (Ground) connection.
3. Connect 1 Blue 18ga. wire to power supply board terminal 22 for the negative connection. Connect
the other end to the Interconnection Box negative.
Data Communication Wiring
RS485 Wires should be twisted together at 3 turns per foot to reduce the effects of electrical noise on
the communication circuit. Due to the risk of noise causing possible problems with communication,
Bennett highly recommends the use of twisted wires, but does not require it.
Note: Belden Shielded Cable is accepted, but the “drain” must not be terminated.

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Installing the Wire Separator
A safe installation requires that a wire separator be installed on the
wires as they are routed through the conduit and into the dispenser’s
electronic enclosure. The wire separator holds the wires apart to ensure that the seal off compound fully
seals around each wire. Apply the potting compound during the last step of installation. This will
prevent flammable vapors from working their way into the electronic enclosure. The wire separator is
supplied in the plastic bag located inside the electronic enclosure attached to the side wall.
CAUTION: Data wires (two 18-gauge per fueling position) are dedicated to a particular fueling
position. To prevent damage to the electronic circuit boards, do not mix the data wires or
connect them to any other data wires!
CAUTION: DO NOT USE WIRE NUTS OR SPLICES ON
DATA WIRES. FAILURE OF THE SYSTEM WILL OCCUR!
1. Wrap some “CHICO X” fiber around wires and push into
conduit assembly to prevent potting from running down the
length of the conduit (see figure 13).
2. Using the wire separator provided, install one wire in each
hole until all wires are separated.
3. Push wire separator at least 3/4” into conduit.
4. Prepare potting compound according to directions. NOTE:
Use “CHICO” potting compound for sealing fittings in
hazardous locations.
5. Using a funnel, pour potting into conduit, be sure to get
potting in between each wire.
6. Let stand until firm.
Figure 13 - Sealing Electrical Conduit
Finishing the Dispenser Wiring Installation
Battery
The 12-volt battery will be disconnected from the factory (see figure
11). Prior to powering up the dispenser the battery must be plugged
into J2 on the Power Distribution Board (see figure 12).
At start up the timer board will not allow the dispenser to power up
until three minutes after a purge pressure of .1 inches of water is
reached. This is required for a complete air change in the dispenser
enclosure to eliminate any explosive gasses.
The timer board relies on a charged battery for proper operation. If
the battery is discharged, the timer will have to be bypassed via the
bypass push button on the timer board. The switch will have to be
held until the battery reaches a suitable charge level. This could take
several minutes. The dispenser enclosure must also be closed and
have a purge pressure of at least .1 inches of water for proper battery
charging.
Figure 11 - Battery Disconnected
Figure 12 - Battery Connected

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DANGER: Fire, explosion, injury or death will occur if fuel vapors are present. Make sure there
are no vapors present before starting this procedure.
CAUTION: To prevent damage to the dispenser, follow the proper start-up procedures.
Before applying AC power to the dispenser, follow this procedure:
1. Open the upper and lower cabinet doors using the keys that were shipped with the unit.
2. Check to make sure:
 The boards and other components have not come loose.
 LCD display boards are not cracked or damaged.
 The cables are properly connected to the boards.
 There are no torn cables or stranded harnesses.
 Both leads to the 12-volt battery are attached.
 Put the AC switch on the power supply board in the OFF position.
3. Make sure the inlet shut-off ball valve is closed.
4. Turn off all pump circuit breakers and all other circuit breakers to the dispenser.
 Make sure the 12-gauge Ground wire is properly terminated in the Junction Box and in the
dispenser ground terminal. This ground connection must measure 1 ohm (or less) resistance to
earth ground at the Junction Box. Prior to using a compression fitting to tie the Ground and
Neutral to the dispenser measure the ground resistance using an Ohm meter connected between
the Ground and the Neutral wire in the Junction box. After measurement connect the wires with
the compression fitting Note: this measurement method only works on 115VAC circuits. Make
sure all the screws on the terminal strip are tight and that the terminal strip is fully pressed onto
the circuit board and snapped in place.
 Make sure the wiring (AC and DC) agrees with the wiring diagrams.
DANGER: There must be no hazardous gases present before powering up the dispenser.
Turn on 115 Volts circuit breaker to supply AC electronic power to the unit:
1. Use a voltmeter to verify 115 Volts AC on TS1 of the Power Distribution Board. TS1, terminal 2 is
Neutral. This AC circuit provides power to the electronic boards. Use a voltmeter to verify there is
no AC power on any other terminals or wires at this point.
2. Turn on the switch on the Power Distribution Board and make sure displays are operating normally.
3. To charge the battery the “override” button on the Timer Board must be pressed and held for a few
seconds until the battery is charged. Once the battery begins to charge release the “override”
button.
FINISHING THE WIRING INSTALLATION - REPLACE THE SAFETY COVERS
Now that the pump is completely wired and tested replace the safety covers.
 Replace the Power Distribution Board cover removed at the start of the wiring process and be sure
that all 4 screws are installed and properly tightened. Perform this operation with the dispenser
power off.
 Check that the Intrinsically Safe Barrier cover is properly installed and the screws are tight.
 Check that the Power Supply cover on the back of the computer module is in place and the screws
are properly tightened.
 Close and lock all dispenser doors and covers.
 Open inlet shut-off ball valve.
WARNING: All covers must be returned to their designed locations or the pump will be unsafe to
operate.
Dispenser Start-Up and Checklist

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Item Procedure Completed
√
1Verify that all CNG fittings are tight and not leaking.
2All hanging hardware must be checked for proper installation and no leaks.
3The units must be properly bolted to the island.
4Vent line must not contain vapor traps.
5Electrical field conduits must be properly potted per local, state and national
codes.
6Equipment must be installed in conjunction with an emergency power cutoff to
remove all power from the equipment in the case of an emergency. Test this
system for proper operation.
7All grounds must be properly connected per the installation manual
requirements as well as local, state and national codes.
8Use of properly sized neutral breaking circuit breakers for the units involved.
9All dispenser electrical power is wired to the same phase of electrical power.
10 Use 3 wire shielded cable or 3 wires together for the card reader RS485
communications circuit. (Bennett highly suggests that these should be twisted
at least 3 times per foot.)
11 Use 3 wire shielded cable or 3 wires together for the Fuel RS485
communications circuit. (Bennett highly suggests that these should be twisted
at least 3 times per foot.)
12 New site wiring must be megger tested. Pull new wires in conduits in existing
installations.
13 Verify the correct brand panels, nozzles and hoses are installed for each grade.
14 Verify that all ball valves are opened.
15 Calibrate the meters per the procedure on page 20.
16 Close and lock all dispenser doors, covers and panels.
17 Verify that bolts have replaced the eyebolts used for transporting the dispenser.
Final Installation Checklist

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Field Wiring and Communication Diagram - Current Loop
Diagram 1 - Current Loop Field Wiring

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Field Wiring and Communication Diagram - Current Loop

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Diagram 2 - RS485 Field Wiring
Field Wiring and Communication Diagram - RS-485

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Field Wiring and Communication Diagram - RS-485