m05600.0 SiteSentinel system. Installation manual

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Table Of Contents

1.0 Before You Begin

1.1 Installer Safety

1.2 Precision Leak Test

1.3 Initial Inspection

1.4 Manifolded Tanks

2.0 System Overview

2.1 Model II Controller

2.2 Model III Controller

2.3 Smart Module

2.4 I/O Module (Optional)

2.5 Model 613 Probe

3.0 Sensors

3.1 Vapor Sensor

3.2 Liquid Sensor

3.3 Universal Sump Sensor

3.4 Universal Reservoir Sensor

3.5 Liquid Phase Sensor

3.6 Interstitial Sensor

3.7 Freon Sensor

4.0 Tank Preparation

4.1 Probe Placement

4.2 Probe Installation in an Underground Tank

4.3 Calculating Product Offset

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5.0 Conduit & Cabinet Installation

5.1 Controller Installation (Indoors Only)

5.2 I/O & Smart Module Installation

5.3 Circuit Breaker Conduit

5.4 RS-232 Communication Conduit

5.5 I/O Device Conduit

5.6 Probe & Sensor Conduit

5.7 Petro-Net Conduit

6.0 Probe & Sensor Installation

6.1 Probe Installation

6.1.1 ADAPTER COLLAR & RISER CAP

6.1.2 PROBE FLOATS

6.1.3 INSTALLATION PROCEDURE

6.2 Sensor Installation

6.2.1 INTRODUCTION

6.2.2 SINGLE-WALL TANK - DRY WELL MONITORING

6.2.3 SINGLE-WALL TANK - WET WELL MONITORING

6.2.4 DOUBLE-WALL TANK - NO WELL MONITORING

6.2.5 DOUBLE-WALL TANK - WITH WELL MONITORING

6.2.6 RESERVOIR SENSOR INSTALLATION

6.2.7 SUMP SENSOR INSTALLATION

6.2.8 INTERSTITIAL SENSOR INSTALLATION

6.2.9 FREON SENSOR INSTALLATION

7.0 Overall System Wiring

7.1 Probe Cable Seal-Offs

7.2 Smart Module Connections

7.3 I/O Module Inputs & Outputs

7.3.1 INPUTS

7.4 PETRO-NET Connections

7.5 Model III Peripherals

7.6 Connecting a Second System

to the Model III

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1.0 Before You Begin

1.1 Installer Safety

WARNING!

Improper installation may endanger

Installers must be experienced with the requirements of intrinsically safe

devices, and must strictly obey the instructions in this manual to

installers and users of this equipment!

perform a safe installation.

Read these instructions CAREFULLY.

Installation must be in accordance with the National Electrical Code

(NFPA No.70) and the Automotive and Marine Service Station Code

(NFPA No. 30A).

Model II? Model III?

A fuel tank is a hazardous area as defined in the NEC. Do not mount

any part of the system, or any external devices (other than probes or

This manual is for BOTH the Site Sentinel Model II and

sensors) within or above the hazardous area.

Model III. The functionality of both is nearly identical. The main

differences are in the controller.

The Model II controller is a large, wall-mounted device

1.2 Precision Leak Test

equipped with a keypad, internal printer (option) and a display

screen. Programming the Model II is typically done at the

A precision leak test should be performed on each tank - especially

controller itself.

older ones - before installing the SiteSentinel. This test makes sure

The Model III controller is a small tabletop box with two

that leak data generated by the system is accurate and reliable. A

buttons and a STATUS display. Aside from the buttons there

pressurized precision leak test can be done on a tank after the probe

are no operator controls on the Model III controller, and all

has been installed, but DO NOT let the pressure exceed 20 psi.

programming is done through the rear-panel port with a PC or

terminal.

Any other differences between II and III are described

1.3 Initial Inspection

where necessary.

The Data Sheet lists specific details about your system. It is packed in

the box with this manual. Store this sheet in a secure location.

Be sure to check the packaging carefully for any damage that might

have occurred during shipping.

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2.0 System Overview

2.1 Model II Controller

The Model II controller (Figure 1 next page) can monitor up to 128

Model II Controller Specifications

probes, sensors, and external input and output devices. Because only

AC power conduit connections are required for the controller, it can be

Width:

19" (48.3 cm)

placed almost anywhere.

Height:

16.25" (41.3 cm)

Depth:

5.75"

(14.6 cm)

Power

105-125 VAC, 60 Hz or 220-240 VAC,

You can operate the Model II controller either from its front-mounted

50 Hz, 60 watts maximum

16-key keypad and graphic display, or from a terminal and/or personal

Temperature Range

32EF to 104EF (0EC to 40EC)

computer ("PC"). No other hardware is required when you operate via

the front panel controls.

Module Capacity

8 Smart Modules and

8 I/O Modules

Display

When operated from a terminal or PC, the terminal can be connected

Backlight:

CCFT

locally (at the same site), or remotely using modems. The optional

Viewing Area:

5" x 3"

(125 mm x 78 mm)

Format:

25 lines x 40 characters

PV250 board (part #20-0227) provides RS-232 ports for the modems,

Dot Matrix:

320 x 200 dots

terminals, PCs, and other external devices such as the K2500 Fuel

Dot Color:

blue characters, white background

Management System. Also included on the PV250 is an RS-232 serial

Keypad

16 keys: 10 alphanumeric; 6 function

port for an external printer, and inputs for two external contacts.

Optional Internal Printer

40 column; plain paper

Any terminal that uses VT52, VT100, or WYSE 50 emulation are

Optional Internal Modem

model 224A; up to 2400 baud

(for remote operation)

compatible with the SiteSentinel. If you are using a PC, it must be

equipped with terminal emulation software.

Standard Alarms

one audible, one visible

External Alarm Inputs*

2 inputs for use with closed contact

type inputs rated at 12 VDC, 40 mA

Though all three methods of operation (display/keypad, local

terminal/PC, and remote terminal/PC) can be connected to the Model II

RS-232C Communication Ports

up to 19,200 baud; VT100, VT52 or

(modem, PC/terminal, passthrough

WYSE 50 emulation required; 7 data

controller simultaneously, only one method may be used at a time. And,

port)*†

bits, even parity, 1 stop bit

an operator cannot be interrupted by a second operator trying to “log

RS-232C External Printer Serial Port*†

1200 baud; 7 data bits, even parity, 1

in” by a different connection method.

stop bit

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2.2 Model III Controller

The Model III controller is a small microprocessor-based device which

can monitor up to eight Smart Modules and eight I/O Modules.

Model III Controller Specifications

Because of its small size, it can be placed in many convenient locations.

Cabinet Dimensions

2" H x 10" W x 11" D

Its “power pack” plugs into any wall outlet.

(5cm H x 25cm W x 28cm D)

Power Requirements

The Model III controller can only be operated from a terminal and/or

Standard

120 VAC, 50/60 Hz

Optional

220 to 240 VAC, 50/60 Hz

PC. The terminal or PC can be connected "locally", (at the same site),

Module Capacity

8 Smart Modules and

"remotely" (using modems and a telephone line), or both.

8 I/O Modules

Serial Communication Ports

Petro-Net (RS-485)

For local operation, the terminal or PC connects directly to one of the

Printer (RS-232)

Model III RS-232 communication ports. For remote operation, attach a

Terminal (RS-232)

Modem (RS-232)

modem to the Model III controller MODEM port. A second modem is

3 Auxiliary Ports (RS-232)

required at the terminal or PC.

Standard Alarm

one audible

Operating Temperature Range

32EF to 122EF (0EC to 50EC)

Any terminal using VT52, VT100, or WYSE 50 protocol is

compatible with the SiteSentinel. For a PC to communicate with the

Operating Temperature Range for

40EF to 85EF (indoors only)

Peripheral Devices

(5EC to 29EC)

SiteSentinel, the PC must run a software program that emulates one

of these terminal standards.

All equipment connected to the controller must be UL listed, equipped with a

Note that although both methods of operation (local terminal/PC and

standard EIA RS-232C or RS-422A communication protocol, and not

remote terminal/PC) can be connected simultaneously, only one method

installed over a hazardous location.

may be used at a time. Once a person has begun using the system, he

can not be interrupted by a second operator.

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2.3 Smart Module

SMART MODULE SPECIFICATIONS

The Smart Module (Figure 2 next page) gathers probe and sensor data.

Electrical Requirements

Up to four devices can be connected to the intrinsically safe (IS) barrier

Standard Voltage Supply:

105 to 125 VAC, 60 Hz

Optional Voltage Supply:

220 to 240 VAC, 50 Hz

in the Smart Module. The barrier isolates the module from hazardous

Power Consumption:

60 watts maximum

areas where probes and sensors are installed. Up to four barriers can be

Dimensions

in each module, a total of 16 devices per module.

Width:

17" (43.2 cm)

Height:

9.75"

(24.8 cm). Mounting tabs add 1"

Depth:

(2.54 cm) top and bottom.

Up to eight modules can be connected to the controller via Petro-Net

5.5"

(13 cm). Key adds 1.5" (3.8 cm)

(twisted pair) wiring, for a total of 128 devices per system. Conduit is

Mounting centers:

16.5" (41.9 cm) width by

recommended for the Petro-Net wiring between the Smart Module and

11" (27.9 cm) height

the controller, but it is not required.

Temperature Range

32EF to 104EF (0EC to 40EC)

Device Capacity

The standard Smart Module includes one I.S. barrier. The part number for

per I.S. Barrier:

up to 4 devices

additional I.S. barriers is 20-4306.

per Smart Module:

up to 16 devices

per System:

up to 128 devices

Probe Cable Requirement

Belden #88760 or Alpha #55371 cable

(shielded two-wire twisted pair)

Sensor Wiring Requirement

14 to 18 AWG oil & gas resistant

(TFFN, THHN, or THWN)

Petro-Net Communication

18 AWG, twisted pair, oil & gas resistant

Wiring Requirement

(TFFN, THHN, or THWN)

Maximum Petro-Net Extension

5000 feet (1.5 km)

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2.4 I/O Module (Optional)

The optional I/O Module expands either model’s capabilities by letting

I/O MODULE SPECIFICATIONS

you connect as many as four input devices and 12 output devices to the

Electrical Requirements

controller. The I/O Module communicates with the controller via

Standard Voltage Supply:

105 to 125 VAC, 60 Hz

Petro-Net (twisted pair wiring). Up to eight I/O Modules can be

Optional Voltage Supply:

220 to 240 VAC, 50 Hz

connected for a total of 32 input and 96 output devices.

Power Consumption:

60 watts maximum

Dimensions

Width:

(20 cm)

Height:

10" (25 cm)

WARNING

Depth:

4" (10 cm)

The input terminals and output relays for the I/O Module are

Temperature Range

32EF to 104EF (0EC to 40EC)

not intrinsically safe. Probe cables and sensor wiring must not

Module Capacity

up to 8 I/O Modules per Controller

share conduit with the wiring from devices connected to the

Device Capacity

4 input devices

I/O Module.

12 output devices

Output Relay Rating

20 amps at 240 VAC (normally open)

10 amps at 240 VAC (normally closed)

Output Relay Wiring

12 to 14 AWG

Requirement

The I/O Module has not been evaluated by Underwriter’s

Laboratories. Interconnection of the I/O Module and the system

Input Rating

10 milliamps @ 5 VDC (sink)

covered in this manual has not been evaluated by Underwriter’s

Input Wiring Requirement

12 to 14 AWG

Laboratories.

Petro-Net Communication

18 AWG, twisted pair, oil & gas

Wiring Requirement

resistant

(TFFN, THHN, or THWN)

Maximum Petro-Net Extension

5000 feet (1.5 km)

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2.5 Model 613 Probe

The Petro Vend 613 probe (Figure 3) has a microcontroller and an

EPROM data base. Setup data is stored in the probe, then downloaded

to the controller during configuration. All 613 probes have built-in

diagnostics for reliable operation.

The 613 can be installed either in aboveground or underground tanks.

Use only Belden #88760 or Alpha #55371 cable to connect the probe

to the Smart Module. If you order the cable from Petro Vend, ask for

part number 12-1300.

Each probe has five temperature sensors in the shaft for measuring

product temperature. They are located at positions of approximately

20%, 40%, 50%, 60% and 80% of probe length. The probe head also

contains a temperature sensor.

Specifications and available lengths for the Model 613 appear on the

next page.

Figure 3 - Model 613 Probe

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PV MODEL 613 PROBE SPECIFICATIONS

PV MODEL 613 PROBE LENGTHS

Power Requirements

Powered through intrinsically safe

barrier in Smart Module only

Probe

Tank Diameter

Location of Temperature Sensors

Length

(or Height)

(Measured from Probe End). The probe

Operating Temperature

-13EF to 131EF (-25EC to 55EC)

head also contains a sensor.

Cable Requirement

Belden #88760 or Alpha #55371 cable

(shielded two-wire twisted pair)

53"

48"

7", 12", 20", 28", 36"

(135 cm)

(122 cm)

(18, 30, 51, 71, 91 cm)

Maximum Cable Extension

1000 feet (305 m)

69"

64"

10", 16", 27", 37", 48"

Level Measurement

(175 cm)

(163 cm)

(25, 41, 69, 94, 122 cm)

Product:

resolution of 0.0005 inch (0.013 mm)

77"

72"

11", 18", 30", 42", 54"

resolution of 0.01 inch (0.3 mm);

(196 cm)

(183 cm)

(28, 46, 76, 107, 137 cm)

Water:

min. measurement: 0.37inch (0.9398

89"

84"

13", 22", 36", 49", 63"

cm,

(226 cm)

(213 cm)

(33, 56, 91, 124, 160 cm)

resolution of 0.001E F (.0005E C)

101"

96"

15", 25", 41", 55", 71"

Temperature:

(257 cm)

(244 cm)

(38, 64, 104, 140, 180 cm)

Classification

Class I, Division 1, Group D hazardous

105"

100"

16", 26", 42", 58", 74"

locations

(267 cm)

(254 cm)

(41, 66, 106, 147, 188 cm)

113"

108"

17", 28", 46", 62", 80"

(287 cm)

(274 cm)

(43, 71, 117, 157, 203 cm)

125"

120"

19", 31", 51", 69", 89"

(317 cm)

(305 cm)

(48, 79, 130, 175, 226 cm)

149"

144"

24", 38", 61", 83", 106"

(378 cm)

(366 cm)

(61, 97, 155, 211, 269 cm)

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3.0 Sensors

3.1 Vapor Sensor

The vapor sensor (Figure 4) can be placed in dry monitoring wells around

single-wall tanks, near pipelines, or in the interstitial space of double-wall

tanks. The sensor also can be aboveground. Keep the following in mind

when considering a vapor sensor:

G Proper installation and sensor placement is CRITICAL.

Installation instructions are in Section 6.

G The sensor detects only certain hydrocarbon vapors. The sensor will

NOT work in steam, or in inert or oxygen-deficient atmospheres.

G The sensor will NOT indicate the presence of explosive or

combustible mists or sprays, lubrication oils, or explosive dusts such

as those from grain or coal.

VAPOR SENSOR SPECIFICATIONS

Substance Detected

Hydrocarbon vapors

Wiring Requirement

14 to 18 AWG, oil & gas resistant

(TFFN, THHN, or THWN)

Maximum Wiring Length

500 feet (152 m) with 18 AWG wire

1000 feet (305 m) with 14 AWG wire

Storage Temp:

-20EF to 160EF (-28EC to 71EC)

Operating Temp:

-5EF to 122EF (-20EC to 50EC)

Power

12 VDC at 120 mA; case is isolated

Size

Length:

1.75"

(45 mm)

Width:

0.63"

(16 mm)

Classification

Class I, Division 1, Group D hazardous

locations

Figure 4 - Vapor Sensor

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3.2 Liquid Sensor

The liquid sensor (Figure 5) is used to detect liquid covering a vapor

sensor, or a liquid inside the interstitial space of a double-wall tank, a

pipe, or a delivery system. The liquid sensor is not destroyed when

activated. Installation instructions are in Section 6.

LIQUID SENSOR SPECIFICATIONS

Substance Detected

Liquid

Wiring Requirement

14 to 18 AWG, oil & gas resistant

(TFFN, THHN, or THWN)

Maximum Wiring Length

500 feet (152 m) with 18 AWG wire

1000 feet (305 m) with 14 AWG wire

Temperature Limits

Storage:

-20EF to 160EF (-28EC to 71EC)

Operating:

-5EF to 122EF (-20EC to 50EC)

Power

12 VDC at 20 mA

Maximum Fresh Water

15 feet (4.5 m)

Submersion

Size

Length:

1.5"

(38 mm)

Width:

0.5"

(13 mm)

Classification

Class I, Division 1, Group D hazardous

locations

Figure 5 - Liquid Sensor

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3.3 Universal Sump Sensor

The universal sump sensor (Figure 6) is used in an attached manway

riser or collar riser. The sump sensor detects the presence of any liquid

in a piping sump. When enough liquid enters the sump riser, it activates

the sump sensor. Installation instructions are in Section 6.

UNIVERSAL SUMP SENSOR SPECIFICATIONS

Substance Detected

Liquid

Fluid Suitability

Water;

Ethylene glycol (up to 50% in water);

Propylene glycol (up to 50% in water);

Gasoline, kerosene or diesel fuel

Wiring Requirement

14 to 18 AWG, oil & gas resistant

(TFFN, THHN, or THWN)

Maximum Wiring Length

500 feet (152 m) with 18 AWG wire

1000 feet (305 m) with 14 AWG wire

Temperature Limits

Storage:

-20EF to 160EF (-30EC to 70EC)

Operating:

-5EF to 120EF (-20EC to 50EC)

Power

12 VDC at 1 mA

Size

Length:

2.5"

(64 mm)

Width:

2.5"

(64 mm)

Classification

CLASS 1 DIV. 1 GROUP D

HAZARDOUS LOCATIONS

Figure 6 - Universal Sump Sensor

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3.4 Universal Reservoir Sensor

The universal reservoir sensor (Figure 7) is used to hydrostatically

monitor a double-wall tank. The sensor, placed in a tank reservoir,

monitors the level of the liquid in the reservoir.

The sensor has a single float which senses a low or a high liquid level.

If a leak occurs in the inner or outer wall of the tank, it causes the

liquid in the reservoir to rise or fall. When liquid reaches the upper or

lower sensor limit, the sensor is activated. Installation instructions are in

Section 6.

UNIVERSAL RESERVOIR SENSOR SPECIFICATIONS

Substance Detected

Change in Reservoir Fluid Level

Fluid Suitability

Potable water;

Potable water with anti-fungal and/or anti-

bacterial Agents;

Salt brine (Up to 30% CaCl in water);

Ethylene glycol (up to 50% in water);

Propylene glycol (up to 50% in water);

Gasoline, kerosine or diesel fuel

Wiring Requirement

14 to 18 AWG, oil & gas resistant

(TFFN, THHN, or THWN)

Maximum Wiring Length

500 feet (152 m) with 18 AWG wire

1000 feet (305 m) with 14 AWG wire

Temperature Limits

Storage:

-20EF to 160EF (-30EC to 70EC)

Operating:

-4EF to 122EF (-20EC to 50EC)

Power

12 VDC at 1 mA

Size

Length:

9.9"

(250 mm)

Width:

2.5"

(64 mm)

Classification

CLASS 1 DIV. 1 GROUP D

HAZARDOUS LOCATIONS

Figure 7 - Universal Reservoir Sensor

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3.5 Liquid Phase Sensor

The liquid phase sensor (Figure 8) detects liquid hydrocarbons in wet

monitoring wells, in piping (with or without secondary containment),

and in above/below grade vaulted tanks.

Liquid phase sensors are available with and without a water-sensing

element. When equipped with both hydrocarbon- and water-sensing

elements, they go to separate terminals in the Smart Module, allowing

the system to show hydrocarbons and water independently. Installation

instructions are in Section 6.

LIQUID PHASE SENSOR SPECIFICATIONS

Substances Detected

Hydrocarbons (other than LPG, heavy

crudes, mineral oils and heavier fuel oils),

chlorinated hydrocarbons, ethers, organic

acids, esters, and higher alcohols

Wiring Requirement

14 to 18 AWG, oil & gas resistant

(TFFN, THHN, or THWN)

Maximum Wiring Length

500 feet (152 m) with 18 AWG wire

1000 feet (305 m) with 14 AWG wire

Operating Temperature Limits

(without water present)

-20EF to 130EF (-30EC to 55EC)

Lengths:Without water element

6, 10 and 15 feet

With water element

15 or 20 feet

Power

12 VDC

Classification

CLASS 1 DIV. 1 GROUP D

HAZARDOUS LOCATIONS

IMPORTANT

If the sensor comes in contact with a hydrocarbon, see Appendix D in the Ops

Guide for instructions on drying the sensor. This is especially important if the

Figure 8 - Liquid Phase Sensor

contact is with a hydrocarbon product other than gasoline (such as diesel fuel).

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3.6 Interstitial Sensor

The interstitial sensor (Figure 9) detects liquid hydrocarbons and/or

water within any interstitial space of ½-inch (13 mm) or more. The

two sensing elements are wired to separate terminals in the SiteSentinel

Smart Module, enabling the system to indicate the presence of

hydrocarbon and water independently. Installation instructions are in

Section 6.

INTERSTITIAL SENSOR SPECIFICATIONS

Substances Detected

Hydrocarbons (other than LPG, heavy crudes, mineral

(Hydrocarbon Sensor)

oils and heavier fuel oils), chlorinated hydrocarbons,

ethers, organic acids, esters, and higher alcohols

Wiring Requirement

14 to 18 AWG, oil & gas resistant

(TFFN, THHN, or THWN)

Maximum Wiring

500 feet (152 m) with 18 AWG wire

Length

1000 feet (305 m) with 14 AWG wire

Operating

Temperature Limits

-20EF to 130EF (-30EC to 55EC)

(without water

present)

Power

12 VDC

Size

Width:

0.5"

(13 mm)

Length:

20 feet (6.1 m)

Classification

CLASS 1, DIV. 1 GROUP D

HAZARDOUS LOCATIONS

IMPORTANT

If the interstitial sensor comes in contact with a hydrocarbon product, refer to

Appendix D in the Operator's Guide for instructions on drying the sensor. This is

especially important if the contact is with a hydrocarbon product other than gasoline

Figure 9 - Interstitial Sensor

(such as diesel fuel).

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3.7 Freon Sensor

The freon sensor (Figure 10) detects refrigerant leaks, possibly

preventing asphyxiation due to freon or ammonia displacement of

oxygen. The sensor detects freon or ammonia fumes caused by leaks.

Place freon sensors around pipes and vessels containing refrigerants.

Proper installation and sensor placement is CRITICAL! For areas

prone to flooding, a liquid sensor is recommended to prevent the freon

sensor from being submerged in liquid. The sealed liquid sensor is

protected from particles such as dirt and requires no special orientation

or modification. Installation instructions are in Section 6. There are two

models of freon sensors available, one for #12 freon (part # 30-3208)

and one for #22 or 134A freon (part # 30-3209).

FREON SENSOR SPECIFICATIONS

Substance Detected

Ammonia or Freon

Maximum Sensitivity

Ammonia:

50 to 150 ppm

Freon:

100 to 300 ppm

Wiring Requirement

14 to 18 AWG, oil & gas resistant

(TFFN, THHN, or THWN)

Maximum Wiring Length

500 feet (152 m) with 18 AWG wire

1000 feet (305 m) with 14 AWG wire

Temperature Limits

Storage

-40EF to 160EF (-40EC to 70EC)

Operating

-20EF to 140EF (-30EC to 60EC)

Temperature Change Effects

±5% from 15EF to 50EF (-10EC to 10EC)

% Highest Maximum Sensitivity

±30% all other ranges

Power

12 VDC at 120 mA

Size

Length:

(76 mm)

Figure 10 - Freon Sensor

Width:

(25 mm)

Classification

CLASS 1 DIV. 1 GROUP D

HAZARDOUS LOCATIONS

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4.0 Tank Preparation

WARNINGS

SiteSentinel probes are safe for Class

1, Div

1, Group D

hazardous locations. This includes tanks containing regular,

super, diesel and unleaded gasoline; antifreeze; kerosene;

mineral spirits; oxinol, methanol and methanol blends; motor,

torque and transmission oil; and alcohol.

If you have any questions about whether a product is included

in this classification, please contact your product distributor or

Petro Vend distributor.

SiteSentinel probes must be installed as described in this

section. If the minimum or maximum dimensions specified

cannot be met, do not proceed with the installation.

4.1 Probe Placement

The ideal location for a probe is in the center of the tank (Figure 11).

The probe should be located at least three feet (91 cm) from the tank

fill pipe. If this distance is less than three feet, the force of the product

entering the tank can cause the water float to rise up the shaft of the

probe. This may cause the SiteSentinel to generate a false high

water alarm. Adjust the drop tube of the fill pipe so that the product

flow is diverted away from the probe.

Figure 11 - Probe Placement

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4.2 Probe Installation in an Underground

Tank

Refer to Figure 12. Install a manhole of at least 18" (46 cm)

diameter around an unused fitting in the top of the tank. This

manhole must be large enough to accommodate a weatherproof

junction box.

If this fitting is not in the center of the tank, you must take

some additional measurements for probe compensation. Refer

to the next page for details.

Install a 4" (10 cm) diameter riser pipe in the fitting. This pipe

must be 19"- 60" (38 - 152 cm) long, enough to allow the cable

from the probe to reach a weatherproof junction box.

Install a weatherproof junction box near the riser pipe. The box

must be large enough to accommodate ½-inch (13 mm)

conduit.

Install the ½-inch NPT bushing (supplied with each probe) in

the weatherproof junction box.

Figure 12 - Underground Tank Preparation

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If the probe is located closer to the shallow end of the tank, the product

4.3 Calculating Product Offset

offset is positive; for the example, 1.8. If the probe is located closer to

the deep end of the tank, the product offset is negative; for the

You can calculate a product offset for a probe that is not installed in the

example, -1.8.

center of a "pitched" tank. Pitch is the tilt of a tank along its horizontal

axis. Some tanks are intentionally installed with one end lower than the

Refer to the Site Sentinel Operator's Guide for details about entering

other. This allows water and sediment to collect at the low end, while

the product offset.

clear product is drawn from the high end. Pitch can also be caused by

tank settling.

The rate of pitch can be measured by using a dipstick to measure the

level of product at two points (preferably opposite ends) of the tank.

See Figure 13. The product depth at the deep (lower) end of the tank is

value "A". The product depth at the shallow (higher) is value "B". The

distance between the two measuring points is "C".

The formula for pitch is:

A - B

For example:

46" - 40"

= 0.05

120"

Figure 13 - Calculating Offset in a Tank

To calculate the product offset, measure value "D", the distance of the

probe from the center of the tank. The formula for product offset is

"D" x pitch. For the example above, 36" x 0.05 = 1.8"

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5.0 Conduit & Cabinet Installation

WARNINGS

Do not mount any system component or external device (other

than probes or sensors) within or above the hazardous area.

Do not drill holes in ANY SiteSentinel cabinets. Do not connect

the controller to equipment that uses or generates more than

250 volts. Probe cables and sensor wiring must not share

conduit with any other wiring. Only power wiring may share

conduit with Petro-Net.

5.1 Controller Installation (Indoors Only)

Figure 14 - Model II Controller Knockouts

MODEL II: Mount the Model II controller on a wall in a secure

indoor location using the mounting tabs provided. If possible, align the

cabinet so that the display is at eye level (approx. 5-6 feet above the

floor). Knockout locations are shown in Figure 14.

MODEL III: Place the Model III controller near an electrical outlet,

and close to where your system wiring enters the facility. Plug the

power pack into the outlet; connect the cable from the power pack to

the jack on the back of the controller.

5.2 I/O & Smart Module Installation

Like the controller, the Smart Modules and the I/O Modules must be

Figure 15 - Model II Smart Module Knockouts

mounted on a wall in a secure indoor location using the mounting tabs

provided. Knockout locations are shown in Figures 15 and 16. Smart

Modules require AC power.

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5.4 RS-232 Communication Conduit

Conduit installation is shown in Figure 17. If a terminal or PC located

+))))))))))))))))))))))))))))))))))))))))))))))),

over 6 feet from the controller is to be connected, you must install

POWER

INPUT/OUTPUT

PETRO-NET

conduit for the RS-232 cable.

Install a ½-inch (13 mm) conduit from a knockout in the controller to a

4"x4" (10 cm x 10 cm) peripheral junction box.

½" or ¾"

1" or 1¼"

½" or ¾"

5.5 I/O Device Conduit

Conduit Knockouts

.)))))))))))))))))))))))))))))))))))))))))))))))-

Conduit installation is shown in Figure 17. You should use rigid steel

conduit for wiring runs to all I/O devices, especially for runs of over 50

feet (15 m).

Figure 16 - I/o Module Knockouts

Each I/O Module has a single 1" - 1.25" (2.5 to 3.3 cm) knockout for

5.3 Circuit Breaker Conduit

the conduit for I/O device wiring. Additional knockouts are provided

for power and Petro-Net communication wiring conduits, refer to

Conduit installation is shown in Figure 17.

Figure 16.

Install a ½-inch (13 mm) conduit from the power knockout in the

controller to the circuit breaker box.

WARNING

Install a ½-inch (13 mm) conduit from the power knockout in each

To prevent interference, all wiring to and from a Smart Module

module to the circuit breaker box. This conduit can also be used for

must be protected by rigid steel conduit. Probe and senso r

Petro-Net wiring.

wires must be alone in their conduits. DO NOT run with wiring

from other manufacturer’s probes, sensors or alarms.

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5.6 Probe & Sensor Conduit

IMPORTANT

Conduit installation is shown in Figure 17. All probe cables and sensor

All probes for a manifold tank group must be connected to the

wiring must be protected by rigid steel conduit. Each Smart Module

same Smart Module.

has four ½-¾-inch (13-19 mm) knockouts to accommodate the conduit

for probe cables and sensor wiring. Additional knockouts are also

Petro-Net communication wiring may share conduit with the AC

provided for power and communication wiring conduits.

power supply wiring for the Controller and the modules. Power

supply wiring for other devices or equipment (such as pumps

Use the table below to determine the number and size of the conduits

and lighting) must not share conduit with either Petro-Net or

run between each Smart Module and its corresponding probes and

the power supply wiring for any SiteSentinel components.

sensors.

Group probe and sensor wires into single dedicated conduits for each

barrier.

5.7 Petro-Net Conduit

Conduit installation is shown in Figure 17. The communication link

PROBES/SENSORS

NUMBER & SIZE OF CONDUIT

between the Smart Module(s), the I/O Module(s), and the controller is

1 to 2

one 1/2-inch

Petro-Net. Petro-Net uses 18 AWG, twisted pair wiring and is immune

3 to 4

one 3/4-inch

to most background electrical noise.

5 to 6

one 1/2- & one 3/4-inch

Conduit is highly recommended as added protection for the wiring. If

7 to 8

two 3/4-inch

conduit is not used, you must install a bushing at each cabinet

9 to 12

three 3/4-inch

knockout; the bushings seal the cabinets and provide strain relief for

13 to 16

four 3/4-inch

the wiring. Order the bushing from Petro Vend (part # 30-0203) or

from Appleton Corp. (their part # CG1250S).

Petro-Net wiring for the modules can be “daisy-chained” - numerous

modules can be tied together, as long as one module in the "chain" is

connected to the controller. See Page 51 for a typical arrangement.

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6.0 Probe & Sensor Installation

6.1 Probe Installation

6.1.1 ADAPTER COLLAR & RISER CAP

A modified adapter collar and riser cap are required for each probe.

These collar and riser cap kits are available from Petro Vend; order kit

number 030-2000.

First, install the modified adapter collar onto the riser pipe. Next, screw

in the bushing supplied with the probe into the d-inch (10 mm) NPT

hole in the riser cap. After the probe is lowered into the tank, snap the

cap into place.

6.1.2 PROBE FLOATS

6.1.3 INSTALLATION PROCEDURE

There are three types of floats used with the probes: Product, Water

A stainless steel plug is welded in the end of the probe. An E-ring is

for Diesel and Water for Gasoline.

attached to the plug to keep the floats from slipping off the probe shaft.

Keep in mind that the two types of water floats are NOT

Remove the E-ring.

interchangable.

With its magnet oriented toward the end of the probe, carefully

Because diesel is more dense than gasoline, the water/diesel floats are

slide the product float onto the shaft.

heavier than the water/gasoline floats. If the wrong water float is

installed in a diesel tank, it does not sink through the product to the

With its magnet oriented toward the head of the probe,

water below. As a result, the tank will have unusually high water

carefully slide the water float onto the probe shaft.

measurements and possibly erratic product measurements as the water

float interferes with the product float.

-------------------------------------------------------------------------------------------------------------------------------------------------------------

1/13/11

If your station has tanks with products of different density (such as

6.2 Sensor Installation

diesel and regular fuel), be sure that the water floats are properly

matched to the products.

6.2.1 INTRODUCTION

The SiteSentinel sensors (described in Section 3, beginning on Page

Replace the E-ring and slide both floats to the bottom of the

11) must be installed, located and operated according to all applicable

probe.

codes. These codes include, but are not limited to, the National Fire

Prevention Code and the National Electrical Code.

A blue cable is provided with each probe. This cable has a

3-prong connector that attaches to the probe head and three

Due to the variety of surface and soil conditions, placement of monitoring

leads to wire at the weatherproof junction box. Feed the blue

wells should be determined by someone familiar with local conditions and

cable through the riser cap. Attach the cable connector to the

codes. Do a ground water survey for best results.

socket in the probe head.

All sensors are intrinsically safe for use in hazardous locations Class 1,

Using the cable, carefully lower the probe into the riser pipe

until it rests on the bottom of the tank. Be careful not to

Group D, Division 1 and 2, as defined by the National Electrical Code.

damage the floats.

Connect to Smart Modules using 14 to 18 AWG twisted pair wiring and

rigid steel conduit. Never "common wire” sensors together.

Tighten the bushing and leave a few inches of slack in the cable.

The maximum distance between a sensor and the Smart Module is 500

feet (152 m) with 18 AWG wire and 1000 feet (305 m) with 14 AWG

wire. Seal off all wiring for vapor protection!

Snap the riser cap in place and secure with a lock.

Four common scenarios are illustrated and described next:

Install the cable bushing with the ½-inch (13 mm) NPT into the

weatherproof junction box. Pass the cable through this bushing

Single-Wall Tank/Dry Well Monitoring

and tighten.

Single-Wall Tank/Wet Well Monitoring

Double-Wall Tank/NO Well Monitoring

IMPORTANT

Double-Wall Tank/WITH Well Monitoring

The end of the probe must rest on the bottom of the tank.

Additional sections explain containment sump monitoring,

aboveground tank monitoring, trench/manway monitoring and freon

sensor installation. Follow the appropriate sections for your site.

-------------------------------------------------------------------------------------------------------------------------------------------------------------

PROCEDURE

6.2.2 SINGLE-WALL TANK - DRY WELL MONITORING

Drill the bore hole away from any surface spill area to prevent

Figure 18 on page 31 represents a typical dry monitoring well layout

spilled products from flowing into the hole.

for a single-wall tank. The sensors are placed around the perimeter of

the tanks. Monitoring wells are dug as close as possible to the tanks or

Line the bore holes with perforated casing to prevent collapse.

product lines for optimum sensor response.

Fill the area between the bore hole walls and the casing with the

Figure 18 also shows a typical monitoring well cross-section. The

proper backfill material to permit gas and water diffusion.

manhole should be watertight, and the monitoring well should be at

least two feet deeper than the bottom of the tanks to be monitored.

Connect the sensor directly to the Smart Module by splicing the

Use either two-inch or four-inch well casing.

sensor wires to TFFN, THHN or THWN (oil and gas resistant)

cabling which, after running thru vapor sealoffs, goes into the

To obtain an adequate sample area, the perforated section should be a

Smart Module.

large part of the well casing’s length. Place a cap on the bottom of the

well casing to prevent dirt entry. Backfill dirt around the casing.

9 If the total distance (from sensor to controller) is 500 feet

(152 m) or less, use 18 AWG wire for the wiring.

The vapor sensor monitors hydrocarbon vapors. A liquid sensor should

also be installed, and placed lower than the vapor sensor to detect any

9 If the total distance is 500 to 1000 feet (152 m to 305 m), you

liquid buildup.

use 14 AWG wire.

Though vapor sensors are not damaged by submersion in liquid, it will

Follow all applicable codes! Use appropriate splicing materials and

not function properly until removed from the liquid and given sufficient

tools when splicing and wiring the sensor.

time to dry. The sealed liquid sensor is protected from particles such as

dirt. It requires no special placement. Any combination of vapor and

Determine the depth of each sensor installation and mark that

liquid sensors may be used.

length on the sensor wiring.

Check the sensor ID tag (on the metal portion of the sensor) for the

WARNING

sensor type (see Page 11). Mark the end of the wiring to identify

Do not "common" wire any of the sensors as damage to the

the sensor type.

Smart Module will result.

Failure to cover monitoring wells may result in personal injury

and/or monitoring well contamination.

-------------------------------------------------------------------------------------------------------------------------------------------------------------

7. Lower the sensors into the well, to the mark on the wiring. The

liquid sensor should not touch the bottom of the well. The vapor

sensor should be about halfway down the well.

8. Thread a cap on the top of the well casing to prevent water and

other contaminants from entering the monitoring well.

9. Run separate wiring from each sensor to the Smart Module. Note

that probe cables and sensor wiring can share the same conduit.

Keep track of sensor wiring to ensure proper wiring at the Smart

Module.

NOTE:

The site diagram shows a Model II controller. Layout is

identical for a Model III controller.

-------------------------------------------------------------------------------------------------------------------------------------------------------------

6.2.3 SINGLE-WALL TANK - WET WELL MONITORING

9 If the total distance (from sensor to controller) is 500 feet

(152 m) or less, use 18 AWG wire for the wiring.

Figure 19 shows a typical wet monitoring well layout for a single-wall

tank. The sensors are placed around the perimeter of the tanks. The

9 If the total distance is 500 to 1000 feet (152 m to 305 m), you

monitoring wells are dug as close as possible to the tanks or product

use 14 AWG wire.

lines for best sensor response.

Follow all applicable codes! Use appropriate splicing materials and

Figure 19 also shows a typical monitoring well cross-section.

tools when splicing and wiring the sensor.

Instructions are the same as that for the dry well monitoring - see Page

29.

Determine the depth of each sensor and mark that length on the

sensor wiring. To make sure the sensor will rest on the bottom of

the well, measure the well from the bottom to the top and add six

inches. Then, use the combined measurement to determine the total

WARNINGS

length, within the well, of the sensor and wiring to be used.

Do not "common" wire any of the sensors as damage to the

Smart Module will result.

Lower the sensors in the well to the mark on the wiring.

Failure to cover monitoring wells may result in personal injury

A liquid-tight straight-fitting is supplied with each sensor. This

and/or monitoring well contamination.

fitting lets you pass the leader wiring through most caps and still

maintain a liquid-tight passage. The clearance hole for non-threaded

mounting is e-inch (16 mm) diameter. Insert the leader wiring

PROCEDURE

through the well cap, using the supplied fitting.

1. Drill the bore hole away from any surface spill area to prevent

Run separate wiring from each sensor to the Smart Module. Note

spilled products from flowing into the hole.

that probe cables and sensor wiring can share the same conduit.

2. Line the bore holes with a perforated casing to prevent collapse.

Keep track of sensor wiring identity to ensure proper wiring at the

Smart Module.

3. Fill the area between the borehole walls and the casing with backfill

material to permit gas and water diffusion.

NOTE:

The site diagram shows a Model II controller. Layout is

4. Connect the sensor directly to the Smart Module by splicing the

identical for a Model III controller.

sensor wires to TFFN, THHN or THWN (oil and gas resistant)

cabling which, after running thru vapor sealoffs, goes into the

Smart Module.

-------------------------------------------------------------------------------------------------------------------------------------------------------------

6.2.4 DOUBLE-WALL TANK - NO WELL MONITORING

Mark the end of the wiring to identify the sensor type.

The space between the walls of a double-wall tank is the interstitial

Lower the liquid sensor into the interstitial space of the tank until it

space, and it is an ideal location for vapor and liquid sensors.

is near the bottom of the tank.

If the outside tank wall develops a leak, water enters the interstitial

Lower the vapor sensor into the interstitial space of the tank, and

space, and the liquid sensor indicates an alarm. If the inside wall

place it mid-way around the circumference of the tank.

develops a leak, the tank contents enter the interstitial space and both

sensors indicate an alarm condition.

Ensure that no water or other contaminants enter the space

between the walls of the tank, since this may cause one of the

Figure 20 on the following page shows a typical sensor layout for a

sensors to trigger an alarm.

double-wall tank.

Run separate wires from each sensor to the Smart Module. Note

that probe cables and sensor wiring can share the same conduit.

WARNING

Keep track of sensor wiring identity to ensure proper wiring at the

Smart Module.

Do not "common" wire any of the sensors as damage to the

Smart Module will result.

NOTE:

The site diagram shows a Model II controller. Layout is

identical for a Model III controller.

PROCEDURE

1. Splice the sensor wires to TFFN, THHN or THWN (oil and gas

resistant) wires. These wires pass thru vapor seal-offs, and enter the

Smart Module.

9 If the total distance from sensor to controller is 500 feet

(152 m) or less, use 18 AWG wire for the wiring.

9 If the total distance is 500 to 1000 feet (152 m to 305 m), use

14 AWG wire.

Follow all applicable codes and use appropriate splicing materials

and tools when splicing and wiring the sensor.

-------------------------------------------------------------------------------------------------------------------------------------------------------------

6.2.5 DOUBLE-WALL TANK - WITH WELL

vapor seal-offs, and enter the Smart Module.

MONITORING

9 If the total distance from sensor to controller is 500 feet (152 m)

A monitoring well is used with a double-wall tank only if the local water

or less, use 18 AWG wire for the wiring.

table reaches tank level. Because of the danger of water table

contamination, install the well with a liquid phase sensor (Page 15).

9 If the total distance is 500 to 1000 feet (152 m to 305 m), use 14

AWG wire.

Figure 21 is a typical wet monitor well layout for a double-wall tank.

Place sensors around the tank’s perimeter. Locate wells as close as

Follow all applicable codes and use appropriate splicing materials and

possible to the tanks or product lines for best sensor response. A

tools when splicing and wiring the sensor.

monitoring well cross-section is also shown. Manholes are water-tight.

Measure the depth of each sensor installation. Mark that length on the

The monitoring well should be at least two feet deeper than the bottom of

sensor wiring. The sensor should rest on the well bottom, so measure

the monitored tanks. Use two- or four-inch well casing; the perforated

the well from the bottom to the top and add six inches. Use the

section should be a large portion of the casing length. The bottom of the

combined measurement to determine the total length, within the well,

casing should have a cap to prevent dirt from entering it, and porous

of the sensor and wiring to be used.

material should be back-filled around the casing.

Lower the sensors in the well to the mark on the wiring.

WARNING

A liquid-tight straight-fitting is supplied with each sensor. This fitting

enables you to pass the leader wiring through most caps and still

Do not "common" wire any of the sensors as damage to the

maintain a liquid-tight passage. The clearance hole for non-threaded

Smart Module will result.

mounting is e-inch (16 mm) diameter. Insert the leader wiring

through the well cap, using the supplied fitting. COVER THE

WELLS! Failure to cover monitoring wells may result in personal

PROCEDURE

injury and/or monitoring well contamination.

1. Drill the bore hole away from any surface spill area to prevent spilled

Run a separate wiring from each sensor to the Smart Module (or the

products from flowing into the hole.

Smart Module junction box). Note that probe cables and sensor

wiring can share the same conduit. Keep track of sensor wiring

2. Line the bore holes with perforated casing to prevent collapse. Fill

identity to ensure proper wiring at the Smart Module.

area between the bore hole walls and casing with the proper backfill

material to permit gas and water diffusion.

NOTE:

The site diagram shows a Model II controller. Layout is

identical for a Model III controller.

4. Connect the sensor to the Smart Module by splicing the sensor wires

to TFFN, THHN or THWN wires. These wires, in turn, pass thru

-------------------------------------------------------------------------------------------------------------------------------------------------------------

6.2.6 RESERVOIR SENSOR INSTALLATION

Connect the sensor to the Smart Module by splicing the sensor

Use a universal reservoir sensor (described on Page 14) with

wires to TFFN, THHN or THWN wires. These wires, in turn, pass

hydrostatically monitored tanks. The reservoir sensor monitors the

thru vapor seal-offs, and enter the Smart Module.

level of the liquid in the reservoir of a double-wall tank. An installation

example appears in Figure 22.

9 If the total distance from sensor to controller is 500 feet

(152 m) or less, use 18 AWG wire for the wiring.

The sensor has a single float which senses a low or a high liquid level

within the reservoir. If a leak occurs in either wall of a tank, it causes

9 If the total distance is 500 to 1000 feet (152 m to 305 m), use

the liquid in the reservoir to rise or fall. When liquid reaches the upper

14 AWG wire.

or lower limit on the sensor, the sensor activates.

Follow all applicable codes and use appropriate splicing materials

PROCEDURE

and tools when splicing and wiring the sensor. Identify sensor wires

to ensure proper wiring at the Smart Module. Follow all applicable

The depth of liquid in the reservoir should be between 4½ inches

codes.

(114 mm) and 5½ inches (140 mm).

Run a separate wiring from each sensor to the Smart Module. Note

Drill a hole in the standpipe large enough for the PVC bushing.

that probe cables and sensor wiring can share the same conduit.

Using an appropriate adhesive, insert the bushing into the hole.

Allow to dry.

Wrap the end of the strain relief bushing with thread sealing tape,

and thread into the PVC bushing.

Feed the sensor lead wiring through the clamp bushing from the

inside of the pipe. Do not tighten the clamp onto the wiring.

Lower the sensor into the reservoir until the sensor rests on the

bottom of the reservoir. Take up the slack in the lead wiring by

pulling the wiring out through the clamp bushing until all of the

slack is removed.

Tighten the clamp bushing onto the wiring. Route the lead wiring

into the junction box and secure the wiring.

-------------------------------------------------------------------------------------------------------------------------------------------------------------

6.2.7 SUMP SENSOR INSTALLATION

The universal sump sensor (described on Page 13) is used in an

Keep track of sensor wiring identity to ensure proper wiring at the

attached manway riser, double-wall piping, or an attached collar riser.

Smart Module. Follow all applicable codes.

A sump sensor detects the presence of any liquid in a piping sump.

When enough liquid enters the sump riser, it activates the sump sensor.

Run separate wiring from each sensor to the Smart Module.

PROCEDURE

Note that probe cables and sensor wiring can share the same

conduit. Keep track of sensor wiring identity to ensure proper

Place the universal sump sensor into the sump.

wiring at the Smart Module.

Route the lead wiring into the junction box.

Adjust the length of the wiring until the sensor is suspended on the

sump floor (this dimension can be changed at your discretion).

Secure the wiring into the box.

Connect the sensor to the Smart Module by splicing the sensor

wires to TFFN, THHN or THWN wires. These wires, in turn, pass

thru vapor seal-offs, and enter the Smart Module.

9 If the total distance from sensor to controller is 500 feet

(152 m) or less, use 18 AWG wire for the wiring.

9 If the total distance is 500 to 1000 feet (152 m to 305 m), use

14 AWG wire.

Follow all applicable codes and use appropriate splicing materials

and tools when splicing and wiring the sensor. Identify sensor wires

to ensure proper wiring at the Smart Module. Follow all applicable

codes.

-------------------------------------------------------------------------------------------------------------------------------------------------------------

6.2.8 INTERSTITIAL SENSOR INSTALLATION

Smart Module. A below grade wiring work box can be used as a

junction box for the splice when wiring underground. Follow all

As shown in Figures 24 and 25, an interstitial sensor (described on

applicable codes.

Page 16) can be installed around the inside perimeter of the retaining

wall or "snaked" under the length of an aboveground tank within the

4. Run separate wiring from each sensor to the Smart Module.

retaining wall area.

Note that probe cables and sensor wiring can share the same

Figure 25 shows the interstitial sensor installed in a manway. The

conduit. Keep track of sensor wiring identity to ensure proper

sensor can also be installed in trenches and inside of a sump.

wiring at the Smart Module.

PROCEDURE

1. Place the interstitial sensor in its intended location.

When installing the sensor in a sump, place the sensor at the

bottom of the sump.

2. Connect the sensor to the Smart Module by splicing the sensor

wires to TFFN, THHN or THWN wires. These wires, in turn, pass

thru vapor seal-offs, and enter the Smart Module.

9 If the total distance from sensor to controller is 500 feet

(152 m) or less, use 18 AWG wire for the wiring.

9 If the total distance is 500 to 1000 feet (152 m to 305 m), use

14 AWG wire.

Follow all applicable codes and use appropriate splicing materials

and tools when splicing and wiring the sensor. Identify sensor wires

to ensure proper wiring at the Smart Module. Follow all applicable

codes.

3. Keep track of sensor wiring identity to ensure proper wiring at the

-------------------------------------------------------------------------------------------------------------------------------------------------------------

6.2.9 FREON SENSOR INSTALLATION

that probe cables and sensor wiring can share the same conduit.

Keep track of sensor wiring identity to ensure proper wiring at the

Freon sensors are described on Page 17. A typical installation is shown

Smart Module.

in Figure 26.

PROCEDURE

WARNING

DO NOT allow PV freon vapor sensors to be submerged in

Place any combination of liquid and refrigerant gas sensors in the

water! Submerged sensors may be damaged, causing

vicinity of the pipe or refrigeration system to be monitored.

improper monitoring. If submersed, always check for proper

operation.

Each freon sensor must be mounted in a standard 4"x4" (10 cm x

10 cm) junction box.

9 All freon sensor wiring must be protected by steel conduit to

prevent contact with any non-intrinsically safe wiring.

Connect the sensor to the Smart Module by splicing the sensor

wires to TFFN, THHN or THWN wires. These wires, in turn, pass

thru vapor seal-offs, and enter the Smart Module.

9 If the total distance from sensor to controller is 500 feet

(152 m) or less, use 18 AWG wire for the wiring.

9 If the total distance is 500 to 1000 feet (152 m to 305 m), use

14 AWG wire.

Follow all applicable codes and use appropriate splicing materials

and tools when splicing and wiring the sensor. Identify sensor wires

to ensure proper wiring at the Smart Module. Follow all applicable

codes.

Keep track of sensor wiring identity to ensure proper wiring at the

Smart Module. Follow all applicable codes.

5. Run a separate wiring from each sensor to the Smart Module. Note

-------------------------------------------------------------------------------------------------------------------------------------------------------------

7.0 Overall System Wiring

WARNINGS

Only Petro Vend probe cables and sensor wiring can share the

conduit to the Smart Modules.

Improper cables, wiring, or conduit allow electronic noise to interfere

with probe/sensor measurements. This may cause measurement

readings at the controller resembling hardware failure.

The warranty is voided if improper cables, wiring, and/or

conduit are installed.

The ground wire must be properly installed for the operation of

the noise filtering circuitry. Do not rely on the conduit for the

operation of the ground.

The controller must have a dedicated power circuit.

7.1 Probe Cable Seal-Offs

Seal off probe cables (Figure 27) before they enter the Smart Module!

This prevents explosive vapors from entering the module. Remove enough

of the jacket to allow approximately three inches of wire leads to extend

past each sealoff. DO NOT nick the wire installation.

Figure 27 - Seal-off Creation

Probe or sensor wires come off the probe or sensor, connect to prepared

Belden or Alpha cable, and then go through NPT bushing into a

weatherproof junction box. Bushings must be used in all junction boxes.

The cable is then routed - via rigid steel conduit - out of the box and

-------------------------------------------------------------------------------------------------------------------------------------------------------------

directly to the Smart Module. Label each cable and wire.

All probes for a manifold tank group must be connected to

the same Smart Module

7.2 Smart Module Connections

See Figure 28. Each Smart Module handles up to 16 probes and

sensors. Devices are identified via the Module Number and Device

Letter (for example, “Module 1 Device A”) on the terminal strip to

which it is wired. You must remove the intrinsically safe barrier panel

to attach wiring. Connect the probe wires and cables according to the

following chart (sensor wiring appears on the following page):

PROBE WIRING

Probe

Probe Cable

Smart Module

Wire

(Belden #88760 or Alpha #55371)

"Device" Terminal

white

red

PWR (power)

black

SIG (signal)

green

shield

GND (ground)

WARNING

Replace barrier panel in the Smart Module before power-up!

Figure 28 - Smart Module Connections

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SENSOR WIRING

Liquid Phase

Interstitial

Hydrocarbo

Smart Module

Liquid

Sump

Reservoir

Freon

"Device" Terminal

Hydrocarbo

Water

Hydrocarbo

Water

Vapor

white

red

red*

red

red*

white

PWR (power)

(jumper)

red

black

white

black

white

green

SIG (signal)

black

-------

--------

-------

black

GND (ground)

Like probe wiring, sensor wires attach to prepared Belden or Alpha wiring in

weatherproof junction boxes. The wiring is routed via rigid steel conduit to the

Smart Module. Connect the sensor wires according to the table above.

IMPORTANT

The interstitial sensor has both hydrocarbon- and water-sensing

elements. The liquid phase sensor is also available with both.

The two sensing elements must be wired to two separate terminal

positions.

Install a jumper between the power terminals of the two positions.

-------------------------------------------------------------------------------------------------------------------------------------------------------------

7.3 I/O Module Inputs & Outputs

7.3.1 INPUTS

See Figure 29. There are four pairs of pins (“Input Terminals”) in each I/O

Module for input devices. Pins 2, 4, 6, and 8 are common. Pins 1, 3, 5,

and 7 are at 5 VDC potential. Inputs are all optically isolated.

I/O input devices must be wired for "normally open" operation: The

SiteSentinel defines an input device as "active" when the device

terminals are closed.

7.3.2 OUTPUTS

There are 12 output relays (Figure 29) in each I/O Module for output

devices. Each relay has three "quick connect" terminals: (1) common,

(2) normally open, and (3) normally closed. Female "quick connect"

terminals for the device wiring are provided with each I/O Module.

7.3.3 STATUS LEDs

STATUS LEDS

COLOR

FUNCTION

Figure 29 - I/O Module Board Overview

Green

Status: slow = unconfigured; fast = data download

Yellow

Reset

Green

Petro-Net RX

Red

Petro-Net TX

Yellow

Petro-Net TX Enable

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7.4 PETRO-NET Connections

WARNINGS

Petro-Net is the communication link between the Smart Module(s), the

Petro-Net wiring must be twisted pair wiring. Conduit is

I/O Modules, and the Model II or Model III controller. Two-wire,

suggested, but not required, for Petro-Net. If conduit is not

twisted pair wiring must be used. Polarity must always be observed for

used, bushings must be installed in the cabinet knockouts to

Petro-Net connections - the wire connected to the #1 position in each

protect wiring and seal the enclosures.

module must be connected to the #1 position in another device, etc.

Polarity must be observed for Petro-Net wiring!

Twisted pair wiring is available from Petro Vend as part #12-1029.

You can easily make this type of wiring by twisting together two 18

AWG gas and oil resistant wires (THHN, TFFN, or THWN). Use

PV250 TERMINAL BOARD (MODEL II ONLY)

between five and ten twists per foot (15 cm).

The optional PV250 board is used to connect the SiteSentinel Model II

At each module, Petro-Net is connected to positions #1 and #2 of the

controller to communication devices, such as a terminal, a PC, a printer

PETRO-NET terminal block. Petro-Net can be "daisy-chained;" -

and/or a modem. These connections are explained below:

modules may be connected to each other in various combinations as

long as one module in the "chain" is connected to the controller. Refer

Terminal Strip

Function

to Figure 30 on the following page for a typical arrangement.

TB1

External Alarm & Phone Input

TB2

External Modem

TB3

Passthrough Port

TB4

External Printer

TB5

Terminal or PC

TB6

Future use

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MODEL II CONTROLLER. At the Model II controller, Petro-Net

is connected to either of the following:

WARNING

Proper grounding is critical for safe system operation and the

Positions 1, 2 of TB4 terminal block on the PV250 board (if

proper operation of the noise filtering circuitry.

present) OR

Do not rely on conduit to provide a ground.

Positions 1, 2 of P5 terminal block on the PV235 controller

board.

Only power wiring may share conduit with Petro-Net.

MODEL II PETRO-NET WIRING

Module

Controller

7.5 Model III Peripherals

"Petro Net"

PV250 Board

PV235 Board

Terminal

"TB4" Terminal

"P5" Terminal

Position #

IMPORTANT

If RS-232 communication will be used for a terminal, PC or

other device more than six feet (1.8 m) from the controller, the

comm cable must be inside conduit..

MODEL III CONTROLLER: At the Model III controller, plug the

round 4-pin DIN connector end of the Controller Petro-Net cable into

TERMINALS/PCs. Connect a terminal or PC to the TERMINAL

the PN socket on the controller (See Figure 30).

socket on the Model III controller (Figure 30). The PC must be running

emulation software.

PRINTER. To connect an optional journal printer, plug the connector

at the end of the printer cable into the PTR socket. Only a Petro Vend

printer can be used with the Model III SiteSentinel.

MODEM COMMUNICATION. To connect the local modem to the

Controller, plug one end of the modem cable into the MOD socket;

connect the other end to the modem. Configure the modem for the

Figure 30 - Model III Controller Rear Panel

same baud rate as used by the SiteSentinel.

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7.7.2 Model III CONTROLLER AC WIRING

7.6 Connecting a Second System

to the Model III

Simply plug the Model III controller’s “power-pak” into a wall outlet

protected by the same circuit breaker that protects other system

The SiteSentinel Model III has a passthrough mode that lets you

components.

communicate with a second system, such as Petro-Vend’s System2

Fuel Management System. With PASSTHRU enabled, you can set up

and operate the second system in the usual manner.

7.7.3 SMART & I/O MODULE AC WIRING

To connect the second system, plug the DIN connector of a modem

See Figure 33 on Page 55. Pull two AC power wires from the

cable into the AUX3 socket of the Model III controller. The other end

circuit breaker to each module; you may "daisy chain" the

of the cable connects to the second system, either directly or via

wires from module to module, not to exceed the circuit breaker

modems. A gender adapter may be required to connect the modem

rating.

cable to the second system hardware.

Connect the live and neutral power wires to the appropriate

terminals in each module.

7.7 AC Power Connections

Make sure the modules are set for the correct voltages

7.7.1 MODEL II CONTROLLER AC WIRING

(115 or 230 VAC). For Smart Modules, check the decal

near the terminal block. For I/O Modules, check the "line

Pull two AC power wires and one ground wire from the circuit

voltage selector" switch on the circuit board.

breaker to the controller. Run through a bushing on the bottom

of the controller.

Determine grounding method: There are two versions of Smart

Module: one has a single ground terminal, the other has a

Connect the neutral and hot wires (in either order) to the power

second ground terminal for the I.S. barrier. These grounding

input terminal block.

methods are illustrated in Figures 31 and 32 on the next page.

Be sure the controller is wired for the correct line voltages

All ground connections must be done with 12 AWG wire.

(115 VAC or 230 VAC) by checking the decal near the terminal

block.

Connect the ground wire to the ground lug. Replace the safety

cover over the terminal block when the wiring is done.

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1/7/99

For the single ground version (Figure 31), connect the ground

terminal from each Smart Module directly to the ground bar in the

circuit breaker. Do not daisy chain the ground wires

For the dual ground version (Figure 32), connect the I.S. ground

terminal from each Smart Module directly to the ground bar in the

circuit breaker. Do NOT daisy chain the I.S. ground wires!

The second ground terminal must also be connected, but these

connections may be daisy chained.

4. Each I/O Module has a single ground terminal, which can be

connected to the circuit breaker ground bar directly or the wires may

be daisy chained.

5. Replace the safety cover over the terminal block when the wiring is

done.

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1/7/99

You can wire two external alarm inputs to the first terminal block on the

7.8 Model II Alarm Wiring

Model II PV250 board (Figure 35) according to the following table. The

Your SiteSentinel Model II has two built-in alarms: (1) a buzzer and

inputs must be closed-contact type.

(2) a lighted pushbutton switch (which turns either or both alarms off).

MODEL II EXTERNAL ALARM WIRING

Your SiteSentinel Operator’s Guide (Part number M56-01.XX) describes

PV250 BOARD / "TB1" Terminal

how to set up the buzzer or switch to buzz and/or light to signal various

Position #

Connection

conditions in the system.

Ground

The buzzer and light are prewired to the 4-terminal block on the PV235

Input #1

controller board (Figure 34) according to the table below. This terminal

Input #2

block is labeled P4 on the PV235 board.

Ground

BUZZER/LIGHT/SWITCH WIRING (Model II ONLY)

PV235 BOARD / "P4" Terminal

Position #

Connection

The optional PV250 board is required to connect

the

SiteSentinel Model II Controller to external devices.

+12 volt common

Buzzer

Light

Switch

To connect a remote buzzer, light, and/or switch, disconnect the prewired

device(s) and wire the new alarm device(s) according the the table above.

Note that the remote alarm devices must be rated at 12 VDC with a

maximum of 0.5 amp. The switch must be rated at 0.5 amp minimum.

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1/7/99

7.10 Model II External Terminal or PC Wiring

7.9 Model II External Printer Wiring

(DB25 CONNECTOR) The Model II controller can be operated from a

The SiteSentinel Model II works with all standard serial printers. Set the

VT52, VT100 or WYSE 50 terminal, or from a PC using software to

printer for 1200 baud, seven data bits, one stop bit, EVEN parity.

emulate one of these terminals.

You must install a bushing in the controller knockout used by the printer

Use a DB25 connector and cable to connect the terminal or PC to an

cable. The bushing is available from Petro Vend (part # 30-0203) or from

RS-232 port in the Model II controller. This port is located at TB5 on the

Appleton (part # CG1250S).

PV250 board. You must install a bushing in the controller knockout used

by the cable. The bushing is available from Petro Vend (part # 30-0203)

The wiring for the external printer is shown in the table below.

or from Appleton (part # CG1250S)

MODEL II EXTERNAL PRINTER WIRING

The table below lists the Model II controller terminal connections and the

PV250 BOARD

CABLE &

standard connector and cable wiring. Set the SiteSentinel to the same

"TB4" Terminal

DATA

CONNECTOR

FLOW

baud rate as the external printer. See Page 61, 63 for more information

Position #

Signal

Wire Color

Pin #

about the baud rate.

----

Orange

CTS

----

White

MODEL II TERMINAL/PC WIRING

DTR

----

Blue

PV250 BOARD

CABLE &

"TB5" Terminal

DATA

CONNECTOR

SIG GND

----

Black

FLOW

Position #

Signal

Wire Color

Pin #

----

Orange

The optional PV250 board is required to connect

the

SiteSentinel Model II controller to external devices.

----

Red

CTS

----

Green

RTS

----

Yellow

SIG GND

----

Black

no connections

Blue, Brown,

6, 8,

& White

& 20

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1/7/99

7.11.2 EXTERNAL MODEL II MODEM

7.11 Model II Modem Wiring

First, install a bushing to protect the cable and to complete the electrical

7.11.1 INTERNAL MODEL II MODEM

enclosure in the appropriate Model II controller knockout. The table

below shows the connections for an external modem. Note that the

An optional internal modem is available for the SiteSentinel Model II

SiteSentinel must be set to the same baud rate as the external modem.

controller. Note that the SiteSentinel must be set to the same baud rate

See Page 61, 63 for more information about the baud rate.

as the internal modem. See Page 61, 63 for more information about the

baud rate.

MODEL II EXTERNAL MODEM

If a SiteSentinel Model II controller does not have a PV250 board, a

PV250 BOARD

CABLE &

special cable is provided for the modem. One end of the cable connects

"TB2" Terminal

DATA

CONNECTOR

FLOW

to the RJ-11 socket located on the modem board. The cable must be

Postion #

Signal

Wire Color

Pin #

threaded through one of the knockouts in the controller. The other end

----

Red

of the cable has a socket that can be attached to a telephone line with an

----

Orange

RJ-11 plug.

CTS

----

Green

If a PV250 board is installed in the Model II, you must connect the red

RTS

----

Yellow

and green telephone wires to the terminal block according to the table

DCD

----

Brown

below:

DTR

----

White

"TB5" Terminal

INTERNAL MODEL II MODEM WIRING

SIG GND

----

Black

PV250 BOARD "TB1" Terminal

TELEPHONE

no connection

Blue

Position #

WIRE

Green

Red

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1/7/99

The second system, connected to the SiteSentinel passthru port, must

7.12 Model II Passthrough Port Wiring

possess the following traits:

7.12.1 OVERVIEW

1. It must be connected to the RS-232 passthrough port in the controller

Passthru Mode lets your Site Sentinel Model II communicate with another

2. It be set up for seven data bits, one stop bit, and even parity

system, such as the Petro Vend’s SYSTEM2 Fuel Management System.

When passthru is enabled, you can program the second system in the usual

3. Have the same baud rate as the controller.

manner.

Install a bushing in the controller knockout used by the cable. The bushing

is available from Petro Vend (part # 30-0203) or from Appleton (part #

CG1250S).

The wiring for the passthough port is shown in the table below.

MODEL II PASSTHROUGH PORT

PV250 BOARD

CABLE &

"TB3" Terminal

DATA

CONNECTOR

FLOW

Postion #

Signal

Wire Color

Pin #

----

Red

----

Orange

CTS

----

Green

RTS

----

Yellow

DCD

----

Brown

DTR

----

White

"TB6" Terminal

SIG GND

----

Black

no connection

Blue

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8.0 Other System Parameters

8.1 Model II Comm Port Setup

IMPORTANT!

The SiteSentinel Model II has communication ports for a modem, a

terminal, a PC and/or a point-of-sale device (POS) or Fuel Management

In STANDARD (non-POS or ACR) Site Sentinel controllers, the

System such as Petro Vend’s System2.

baud rates of the pass-through, terminal and modem ports are all set

with Switch #1, positions 1, 2 and 3 (table opposite). Word length and

The baud rate for the terminal and modem ports is set by the first three

parity are set with position #4 of Switch #1.

positions of the DIP switch on the PV235 board. The switch is located on

the left-hand side of the board. The table below lists how to set the

In POS and ACR Site Sentinel controllers, Switch #1 positions 1-3

switches.

sets terminal and modem port baud rate.

Position 4 of Switch #1 sets word length and parity in all models as

MODEL II PASS-THRU, TERMINAL and MODEM PORT BAUD RATE

follows: OPEN =7-bit word with EVEN parity. CLOSED = 8-bit

PV235 BOARD DIP SWITCH 1

word with NO parity.

Switch 1 Position...

Baud

Rate

Positions 5, 6 and 7 of Switch #1 are not currently used and should be

OPEN. Position 8 is used by the factory to enable a special hardware

110

OPEN

test.

Under normal operating conditions, position

8 must be

300

CLOSED

OPEN

CLOSED.

600

OPEN

CLOSED

OPEN

1200

CLOSED

OPEN

ALL ports in all systems must all be set at the same baud rate and word

2400

OPEN

CLOSED

length.

4800

CLOSED

OPEN

CLOSED

You MUST cycle power for any change to take effect.

9600

OPEN

CLOSED

19200

CLOSED

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1/7/99

8.2 Model III Comm Port Setup

IMPORTANT

MODEL III PAS-THRU, TERMINAL and MODEM PORT BAUD SETUP

Plug in the controller’s battery before configuring the controller.

PV271 BOARD, DIP SWITCH #1

Baud

Switch 1 Position...

Rate

In STANDARD (non-POS or ACR) Site Sentinel controllers, the

110

OPEN

baud rates of the pass-through, terminal and modem ports are all set

with Switch #1, positions 1, 2 and 3. Word length and parity are set

300

CLOSED

OPEN

with position #4 of Switch #1.

600

OPEN

CLOSED

OPEN

1200

CLOSED

OPEN

In POS and ACR Site Sentinel controllers, Switch #1 positions 1-3

2400

OPEN

CLOSED

sets terminal and modem port baud rate. Word length and parity are

4800

CLOSED

OPEN

CLOSED

set with position #4 of Switch #1.

9600

OPEN

CLOSED

19200

CLOSED

Positions 5, 6 and 7 of Switch #1 are not currently used and should be

OPEN. Position 8 is used by the factory to enable a special hardware

NOTE: Switch #1 does not affect Petro-Net or other port settings.

test.

Under normal operating conditions, position

8 must be

CLOSED.

SWITCH 1 POSITION 4 - WORD LENGTH and PARITY

ALL ports in all systems must all be set at the same baud rate and word

Position 4 OPEN =

7-bit word with EVEN parity

length.

Position 4 CLOSED =

8-bit word with NO parity

SWITCH 1 POSITIONS 5-7 - Not currently used

Use the RESET switch to reset ("warm start") the Controller.

completed measurement data or configuration data are lost or changed by

resetting the Controller.

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1/7/99

8.4 Model III Controller Board LEDs

8.5 Module Assignment (Both Models)

Smart Modules and I/O Modules must each be assigned a unique

CR35. 36, 38, and 40 are POS or ACR Site Sentinel specific.

identification number.

MODEL III PV271 CONTROLLER BOARD LEDS

Module numbers must be unique within the module group; that is, you

Label

Color

Function

can assign the same number to both a Smart Module and to an I/O

Module, but you can not assign the same number to more than one Smart

CR31

Yellow

Reset

Module or to more than one I/O Module.

CR23

Red

RS-485 Petro-Net Transmit

CR22

Green

RS-485 Petro-Net Receive

The module numbers are used when the system is configured. Refer to

CR24

Yellow

RS-485 Petro-Net TX Enable

your SiteSentinel Operator's Manual for details about system setup.

CR81

Red

RS-232 Terminal Transmit

CR86

Green

RS-232 Terminal Receive

A small, red rotary switch is located at the top of the PC board inside each

CR36

Red

RS-232 POS (ACR) or POS2 (POS) Transmit

module. The switch has ten positions, marked "0" to "9". A small arrow

CR38

Green

RS-232 POS (ACR) or POS2 (POS) Receive

on the switch points to the current position. Default switch setting is “1".

CR32

Red

RS-232 Printer Transmit

CR37

Green

RS-232 Printer Receive

Although the switch has ten settings, only settings 1-8 are

CR80

Red

RS-232 Modem Transmit

valid. DO NOT set the switch to either "0" or "9" - the module

CR85

Green

RS-232 Modem Receive

will NOT be recognized by the system!

CR35

Red

RS-232 CONSOLE (ACR) or POS (POS) Transmit

CR40

Green

RS-232 CONSOLE (ACR) or POS (POS) Receive

1. Turn the module power off

CR41

Red

RS-232 AUX Transmit

CR39

Green

RS-232 AUX Receive

2. Use a 1/4-inch (6 mm) blade screwdriver to gently rotate the small

white screw inside the rotary switch to the desired location.

3. Turn the module power on.

DO NOT change the module number while the module power is ON.