Onicon SYSTEM-30 Operating instructions

SYSTEM-30 BTU MEASUREMENT SYSTEM
BACnet MS/TP Version
Installation and Operation Guide
For Software Version FB5.20 or higher.
1500 North Belcher Road, Clearwater, FL 33765 • Tel [phone] • Fax [phone]
www.onicon.com • [email protected]
0691 01-09

1500 North Belcher Road, Clearwater, FL 33765 • Tel [phone] • Fax [phone] • [email protected]
System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 2
Safety Information
This meter was calibrated at the factory before shipment.
To ensure correct use of the meter, please read this manual thoroughly.
Regarding This Manual:
• This manual should be passed on to the end user.
• Before use, read this manual thoroughly to comprehend its contents.
• The contents of this manual may be changed without prior notice.
• All rights reserved. No part of this manual may be reproduced in any form without
ONICON’s written permission.
• ONICON makes no warranty of any kind with regard to this material, including, but
not limited to, implied warranties of merchantability and suitability for a particular
purpose.
• All reasonable effort has been made to ensure the accuracy of the contents of this
manual. However, if any errors are found, please inform ONICON.
• ONICON assumes no responsibilities for this product except as stated in the warranty.
• If the customer or any third party is harmed by the use of this product, ONICON
assumes no responsibility for any such harm owing to any defects in the product which
were not predictable, or for any indirect damages.
Safety Precautions:
The following general safety precautions must be observed during all phases of
installation, operation, service, and repair of this product. Failure to comply with these
precautions or with specic WARNINGS given elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the product. ONICON Incorporated
assumes no liability for the customer’s failure to comply with these requirements. If this
product is used in a manner not specied in this manual, the protection provided by this
product may be impaired.
The following symbols are used in this manual:
!
!
i
WARNING
Messages identied as “Warning” contain information regarding the personal safety of
individuals involved in the installation, operation or service of this product.
CAUTION
Messages identied as “Caution” contain information regarding potential damage to the
product or other ancillary products.
IMPORTANT NOTE
Messages identied as “Important Note” contain information critical to the proper operation
of the product.

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 3
TABLE OF CONTENTS
1.0 INTRODUCTION .............................................................................................................. 5
1.1 Purpose of this Guide ............................................................................................... 5
1.2 Typical SYSTEM-30 BTU MEASUREMENT SYSTEM ........................................... 5
1.3 Standard Features and Specications ..................................................................... 6
1.4 Working Environment .............................................................................................. 7
1.5 Warranty and Serial Number ................................................................................... 7
2.0 UNPACKING ..................................................................................................................... 8
2.1 Checking That You Have Received Everything ...................................................... 8
3.0 INSTALLATION ................................................................................................................ 9
3.1 Site Selection ............................................................................................................ 9
3.2 Mechanical Installation ......................................................................................... 10
3.2.1 Main Unit Installation .................................................................................. 10
3.2.2 Thermowell Installation .............................................................................. 11
3.2.3 Temperature Sensor Installation ................................................................. 11
3.3 Electrical Installation ............................................................................................. 13
3.3.1 Single Mode vs. Dual Mode Operation ....................................................... 13
3.3.2 Electrical Wiring .......................................................................................... 16
4.0 START UP & COMMISSIONING ..................................................................................... 17
4.1 Display and User Interface ....................................................................................... 17
4.2 Processor Start Up ................................................................................................... 17
4.3 Units and Multipliers ............................................................................................... 18
4.4 Network Device Address Entry ............................................................................... 19
4.4.1 Changing the MAC Address ......................................................................... 19
4.4.2 Changing the Device Instance Number ....................................................... 19
4.5 BAUD Rate ................................................................................................................ 26
4.6 BACnet Objects ....................................................................................................... 27
4.7 Diagnostics .............................................................................................................. 28
4.7.1 Diagnostic Lights .......................................................................................... 28
4.8 Commissioning ........................................................................................................ 29
4.8.1 Commissioning Worksheet .......................................................................... 30

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 4
APPENDIX A – DRAWINGS
A-1 TYPICAL SYSTEM INSTALLATION
A-2 / A-3 THERMOWELL INSTALLATION
A-4 WIRING DIAGRAM
A-5 SIGNAL CONNECTION BOARD
A-6 WIRING DIAGRAM FOR DIN CONNECTOR
A-7 BACnet BOARD

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 5
SECTION 1.0: INTRODUCTION
1.1 PURPOSE OF THIS GUIDE
The purpose of this guide is to provide installation and commissioning procedures and basic
operating and servicing instructions for the ONICON SYSTEM-30 BTU MEASUREMENT
SYSTEM.
1.2 TYPICAL SYSTEM-30 BTU MEASUREMENT SYSTEM
ONICON’S System-30 is a true heat (Btu) computer, which accepts data from several sensors,
performs a series of computations with that data, and transmits the results as an indication of the
amount of heat (Btu’s) being transferred or as a totalized amount.
WARNING
Only qualied service personnel should attempt to install or service this equipment. Serious
injury may result from the improper installation or use of this equipment.
!
SYSTEM-30 BTU MEASUREMENT SYSTEM WITH INTEGRAL
FLOW METER & TEMPERATURE SENSORS
0333-2
INCORPORATED
ISOLATION VALVE
Normally Open ISOLATION VALVE
Normally Open
BYPASS VALVE
Normally Closed
20" 10"
CHILLED WATER
SUPPLY
Y Strainer Upstream
Of Flow Meter
CHILLED WATER
RETURN
CONTROL SYSTEM
BACnet MS/TP
NETWORK
24 VAC POWER
FAN COIL UNIT
OR
AIR HANDLING UNIT
1500 North Belcher Road, Clearwater, FL 33765 • Tel [phone] • Fax [phone]
www.onicon.com • [email protected] 01-13-09
RETURN TEMP
FLOW
DIAGNOSTIC
LED’S

1500 North Belcher Road, Clearwater, FL 33765 • Tel [phone] • Fax [phone] • [email protected]
System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 6
1.3 STANDARD FEATURES AND SPECIFICATIONS
• Single mode Btu calculations, in either the heating or cooling mode, are totalized and
reported.
• Two-pipe dual mode Btu calculations in both the heating mode and the cooling mode are
totalized and reported separately.
GENERAL SPECIFICATIONS
CALIBRATION
Flow sensor and temperature sensors are individually
calibrated, followed by a complete system calibration.
Field commissioning is also available.
ACCURACY
Differential temperature accuracy ±0.15° F over
calibrated range
Computing non-linearity within ±0.05%
Flow sensor accuracy:
±0.5% OF READING at calibrated velocity
±1% OF READING from 3 to 30 ft/s (10:1 range)
±2% OF READING from 0.4 to 20 ft/s (50:1 range)
TEMPERATURE SENSORS
Solid state sensors are custom calibrated using N.I.S.T.
traceable temperature standards.
PROGRAMMING
Factory programmed for each specic application
MEMORY
Nonvolatile EEPROM memory retains all program
parameters and totalized values in the event of power loss.
OUTPUT SIGNALS
Isolated solid state dry contacts for mode 1 and mode 2
energy total
Contact rating: 100 mA, 50VDC maximum
Contact duration: 0.5, 1, 2 or 6 sec selectable
NETWORK INTERFACE
BACnet MS/TP Protocol
RS485, 2-wire (half duplex)
BACnet DEVICE OBJECTS
Total Energy (Btu, ton-hr(s), kw-hr)
Energy Rate (Btu/hr, tons, kw)
Total Flow (gallons, liters, cubic meters)
Flow Rate (gpm, l/s, l/m, m3/hr)
Supply Temperature (°F, °C)
Return Temperature (°F, °C)
Mode (Heating-Cooling) Indicator
BAUD RATE
76800, 38400, 19200, or 9600 bps
OPTIONAL LOCAL DISPLAY
Alphanumeric LCD displays total energy, total, ow,
energy rate, ow rate, supply temperature and return
temperature
Alpha: 16 characters, 0.2” high
Numeric: 6 digit, 0.4” high
MAINTENANCE
ONICON recommends periodic inspection and
recalibration. No other periodic maintenance is required.
TEMPERATURE RANGE
Liquid temperature range: 32° to 200°F
Ambient temperature range: 40° to 120°F
MECHANICAL
OVERALL DIMENSION:
9.25” L x 5” W x 6.5” H
TEMPERATURE THERMOWELL:
Brass thermowell (½” sweat or ¼” NPT)
ELECTRICAL
This equipment is intended for INSTALLATION
CATEGORY (OVERVOLTAGE CATEGORY) II
applications
INPUT VOLTAGE: 24 V ±10% AC 50/60 Hz or
24 V ±4 DC
INPUT CURRENT: 200 mA maximum
TERMINALS CONNECTIONS: Use 18-22 ga. Copper
wire. Do not exceed 4.5 in-lb (0.5 Nm) of torque
when tightening.
WIRING:
CONDUIT: Use PVC jacketed copper cable with a wire
gauge suitable for the length of run and required
maximum current carrying capacity. The installation
must comply with all local, state and federal codes.
PLENUM AREA: (without conduit) Use plenum rated
copper cable with a wire gauge suitable for the length
of run and required maximum current carrying
capacity. The installation must comply with all local,
state and federal building codes.
Note: Specications are subject to change without notice.

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 7
1.4 WORKING ENVIRONMENT
The SYSTEM-30 was designed for installation and use in typical commercial and residential
environments that are free of corrosive liquids and fumes, direct liquid exposure, heavy
condensation, and temperature extremes and vibrations.
The operating ambient air temperature range is 40° F to 120° F.
The electrical power should be relatively clean, free of high frequency noise, large voltage
transients, and protected from power surges and brown outs.
1.5 WARRANTY & SERIAL NUMBER
Warranty
ONICON’s 2-year “No-fault” warranty reduces start-up costs with extended coverage that
includes coverage for incidental damage during installation. Certain exclusions apply. See
our complete warranty statement for details.
Serial Number
The serial number of your SYSTEM-30 is located on the side of the enclosure. Serial
numbers are unique identiers that you should have available when contacting the factory
for assistance regarding your system.

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 8
SECTION 2.0: UNPACKING
The SYSTEM-30 generally ships in one package unless optional hardware or equipment is ordered.
If any items are damaged, notify the shipping company (all products are shipped insured) and the
ONICON Customer Service Department.
2.1 CHECKING THAT YOU HAVE RECEIVED EVERYTHING
Standard Documentation
Enclosed with each SYSTEM-30 is a comprehensive documentation package that includes
the following items:
The SYSTEM-30 BTU MEASUREMENT SYSTEM Installation and Operation Guide
The System-30 Calibration Data Sheet
Typical Installation Drawing
Wiring Diagram
Please notify ONICON immediately if any items are missing.
The Main Unit
Remove the System-30 from the shipping carton and inspect it for physical damage.
Temperature Sensors
One temperature sensor is built-in to the body of the meter and the other is connected to
the main unit via a permanently attached cable. Inspect the free sensor and cable for
external damage.
Temperature Thermowell
A standard thermowell with installation hardware is packed with the main unit.
Mounting Hardware
The System-30 is supplied with two tail pieces to facilitate connection to the piping
system. A compression tting with retaining nut makes up one end of each tail piece. The
other end will either be a sweat tting for copper or a threaded nipple with NPT threads.

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 9
SECTION 3.0: INSTALLATION
The SYSTEM-30 BTU MEASUREMENT SYSTEM should be installed by experienced plumbers and
others with related knowledge and experience in the heating, cooling, and uid metering elds.
ONICON will be happy to assist with technical recommendations and to provide guidance by
telephone and/or mail. On-site eld engineering, installation, and/or service is also available at an
additional cost.
The installer should use good trade practices and adhere to all state and local building or other
applicable codes.
3.1 SITE SELECTION
Careful attention to the site selection for the system components will help the installers with the
initial installation, reduce start-up problems, and make future maintenance easier. For example,
do not install the System-30 or its temperature sensor where it will be difcult for personnel to
perform periodic maintenance and calibration. When selecting a site for mounting the system
components, consider the criteria under Section 1.4, WORKING ENVIRONMENT, as well as the
following:
The Main Unit
Choose the location (supply or return) with the longest straight, unobstructed run. Ideally,
the location chosen should allow for at least 20 diameters of unobstructed straight run
upstream of the meter and at least 10 diameters of unobstructed straight run downstream.
If both the supply and return have adequate straight run conditions, locate the meter in the
supply.
The location must be accessible to facilitate service and recalibration.
The Temperature Sensor
The temperature sensor should be located in an accessible location. This will facilitate
any on-site service.
Place the temperature sensor away from sources of electrical noise that might interfere
with the temperature sensor signal.
CAUTION
ONICON strongly recommends the use of a valved bypass and strainer in conjunction with the
installation of the System-30 to facilitate servicing and to protect the turbine assembly during
start-up.
!

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 10
3.2 MECHANICAL INSTALLATION
3.2.1 Main Unit Installation
Find an easily accessible location where wire connections can be made and the diagnostic
LED’s can be viewed from oor level. The location where the main unit is mounted should
be free from vibration. Clean the external surface of the pipe at the installation site so that
it is free of debris, foreign matter, solids, leak inhibitors, and chemically aggressive
substances. Next, locate the tail pieces that were shipped with the main unit and install
these on the pipe making certain that the compression nuts are correctly oriented.
Wherever appropriate, use pipe dope on threaded connections to ensure a leak free seal.
DO NOT USE TEFLON TAPE.
Insert the main unit between the two open ends of the pipe and secure in place using the
compression ttings. MAKE CERTAIN THAT THE FLOW DIRECTION ARROW ON THE
BODY OF THE MAIN UNIT IS POINTING IN THE DIRECTION OF FLOW.
CAUTION
Before you attempt to use the BTU MEASUREMENT SYSTEM, isolate the main unit, open the
bypass and ush the entire system so that it is free of ux, solder, pipe and tube cuttings and any
other free moving particles.
!
SYSTEM-30 BTU MEASUREMENT SYSTEM WITH INTEGRAL
FLOW METER & TEMPERATURE SENSORS
0333-2
INCORPORATED
ISOLATION VALVE
Normally Open ISOLATION VALVE
Normally Open
BYPASS VALVE
Normally Closed
20" 10"
CHILLED WATER
SUPPLY
Y Strainer Upstream
Of Flow Meter
CHILLED WATER
RETURN
CONTROL SYSTEM
BACnet MS/TP
NETWORK
24 VAC POWER
FAN COIL UNIT
OR
AIR HANDLING UNIT
1500 North Belcher Road, Clearwater, FL 33765 • Tel [phone] • Fax [phone]
www.onicon.com • [email protected] 01-13-09
RETURN TEMP
FLOW
DIAGNOSTIC
LED’S

1500 North Belcher Road, Clearwater, FL 33765 • Tel [phone] • Fax [phone] • [email protected]
System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 11
3.2.2 Thermowell Installation
Standard Thermowell
The most common installation methods are shown below. Consult the factory for
special applications.
3.2.3 Temperature Sensor Installation
The temperature sensor is factory matched and permanently attached to the BTU
MEASUREMENT SYSTEM. Sensors from different Btu meters cannot be used without
being returned to the factory for recalibration.
Apply a thin coat of thermally conductive grease to the temperature sensor, and gently
insert the temperature sensor all the way into the thermowell until it contacts the bottom
of the cavity. Gently tighten the retainer cap. DO NOT OVER TIGHTEN. The thermowell
completely seals the plumbing system without the retainer cap. The only purpose of the
cap is to keep the sensor from losing contact with the bottom of the thermowell cavity.
IMPORTANT NOTE
It is important that no dirt or other foreign material be allowed into the thermowell as this could
affect the thermal response of the system.
CAUTION
Cable length is specied at time of order. This is three wire shielded plenum rated cable.
Altering the cable length will affect calibration. Do not change the cable length without
consulting ONICON.
!
i

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 12
THERMOWELL INSTALLATION IN THREADED PIPE TEES
THERMOWELL INSTALLATION IN COPPER TEE

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 13
THERMOWELL INSTALLATION IN WELDED PIPE
3.3 ELECTRICAL INSTALLATION
All user supplied conduit ttings, junction boxes, etc. are to be installed as required by legal
codes.
3.3.1 Single Mode (4 Pipe) Vs. Dual Mode (2 Pipe) Operation
ONICON System 30 BTU Meters may be congured for single or dual mode applications.
Single and dual mode is a reference to the piping system and not the meter itself. Single
mode (4 pipes) applications are those that always have the same relationship between the
supply and return pipe temperatures. In dual mode (2 pipes) applications the polarity of
the temperature differential (Delta t) reverses; often on a seasonal basis.
IMPORTANT NOTE
The System-30-BAC BTU Meter is designed with one internal (Temp1) and one remote (Temp 2)
temperature sensor. If the meter body is located in the supply pipe then the internal temperature
sensor will indicate the supply temperature and the remote sensor will indicate the return tem-
perature. This relationship will reverse if the meter body is located in the return pipe. The loca-
tion of the meter will also affect the logic used to determine mode 1 and mode 2 operations for
dual mode applications. Single mode energy measurements are absolute measurements and are
not effected by polarity of the Delta t.
i

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 14
It is often desirable to totalize the amount of energy transferred in each mode in separate registers.
For these applications, ONICON BTU meters may be congured for dual mode operation. In this
conguration, the meter will measure and totalize energy in separate registers based on the
polarity of the Delta t.
The drawings and tables below illustrate the relationship between meter location, temperature
sensor and mode of operation.
Temperature Sensor/ Mode of Operation Relationship with Meter in Supply Line
Supply Temp Temperature 1 Sensor (Internal Sensor)
Return Temp Temperature 2 Sensor (External Sensor)
Mode 1 Total Heating (Supply Temp > Return Temp)
Mode 2 Total Cooling (Supply Temp < Return Temp)
SYSTEM-30 BTU MEASUREMENT SYSTEM WITH INTEGRAL
FLOW METER & TEMPERATURE SENSORS
0333-2
INCORPORATED
ISOLATION VALVE
Normally Open ISOLATION VALVE
Normally Open
BYPASS VALVE
Normally Closed
20" 10"
CHILLED WATER
SUPPLY
Y Strainer Upstream
Of Flow Meter
CHILLED WATER
RETURN
CONTROL SYSTEM
BACnet MS/TP
NETWORK
24 VAC POWER
FAN COIL UNIT
OR
AIR HANDLING UNIT
1500 North Belcher Road, Clearwater, FL 33765 • Tel [phone] • Fax [phone]
www.onicon.com • [email protected] 01-13-09
RETURN TEMP
FLOW
DIAGNOSTIC
LED’S

1500 North Belcher Road, Clearwater, FL 33765 • Tel [phone] • Fax [phone] • [email protected]
System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 15
Temperature Sensor/ Mode of Operation Relationship with Meter in Return Line
Supply Temp Temperature 2 (External Sensor)
Return Temp Temperature 1 (Internal Sensor)
Mode 1 Total Cooling (Supply Temp < Return Temp)
Mode 2 Total Heating (Supply Temp > Return Temp)
CONTROL SYSTEM
BACnet MS/TP
NETWORK
NORMALLY CLOSED

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 16
3.3.2 Electrical Wiring
Connect all Btu meter signal outputs to terminal strip TB1 and/or TB4 (optional
communication output) as shown below. Then connect the 24 V AC/DC input power to
terminal strip TB1. The standard SYSTEM-30 is congured for 24 V AC 50/60 Hz
operation or 24 V DC operation. Do not connect the 24 V AC/DC source until all other
signal connections have been made and veried.
RS 485 (+) RS 485 (-) RS 485 (grnd)
}BACnet
CAUTION
Only qualied service personnel should make connections between the System-30-BAC BTU
Meter and the user’s external equipment. ONICON assumes no responsibility for damaged caused
tot he external equipment as a result of an improper installation.
!

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 17
SECTION 4.0: START UP AND COMMISSIONING
4.1 DISPLAY AND USER INTERFACE (If display ordered)
The System 30 may be ordered from the factory with an optional display and user interface.
The display consists of 2 lines of alphanumeric characters. Line 1 indicates the current value
while the bottom line identies the engineering units and multiplier values that apply to the
current value displayed on line 1. In the example shown the current value is 3864, the
engineering units are Btu’s and the multiplier is 10,000. This would be read as 38,640,000 Btu’s.
The user interface consists of 3 pushbutton switches. These 3 switches allow the user to operate
the display and program the meter.
When operating in the run mode, the scroll button
advances the display from one parameter to the next.
A total of up to 8 different operating parameters may
be available for display depending on whether the
meter is being used in a single mode or dual mode
application.
When operating in the run mode, the reset button (if
enabled) allows the user to reset volume and energy
totals.
The program button is not functional in the run mode.
4.2 PROCESSOR START-UP
When power is applied to the BTU Meter alphanumeric characters appear on the two lines of
the display, indicating the meter is operating. Press and release the SCROLL button on the front
panel. Observe the display cycle to the next display page.
Select the SUPPLY TEMP Page. Note the displayed temperature. Conrm that it is in the
expected range. Now select the RETURN TEMP page. Again note the displayed temperature.
Conrm that it is also in the correct range.
Select the FLOW RATE page. Note the displayed ow rate. Conrm that the ow rate value is in
the correct range.
Successively pressing the SCROLL button will cycle the display through the run mode pages
summarized in the tables on the next page.

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 18
Single Mode Operation
SINGLE MODE BTU METERS – RUN MODE DISPLAY PAGES
PAGE No. DISPLAY NAME SELECTABLE UNITS
1ENERGY TOTAL BTU, TONHR or KWHR
2VOLUME TOTAL GAL, LITER, METERS3
3ENERGY RATE BTU / HR, TONS, KW
4VOLUME RATE GPM, GPH, MGD, L/SEC, L/MIN, L/HR,
METERS3 /HR
5INTRN TEMP DEG F, DEG C
6EXTRN TEMP DEG F, DEG C
Dual Mode BTU Meters
DUAL MODE BTU METERS – RUN MODE DISPLAY PAGES
PAGE No. DISPLAY NAME SELECTABLE UNITS
1MODE 1 ENERGY TOTAL BTU, TONHR or KWHR
2MODE 1 VOLUME TOTAL GAL, LITER, METERS3
3MODE 2 ENERGY TOTAL BTU or TONHR
4MODE 2 VOLUME TOTAL GAL, LITER, METERS3
5ENERGY RATE BTU / HR, TONS or KW
6VOLUME RATE GPM, GPH, MGD, L/SEC, L/MIN, L/HR,
METERS3 /HR
7INTRN TEMP DEG F, DEG C
8EXTRN TEMP DEG F, DEG C
The operating mode, measurement units and multipliers are programmed into the Btu
meter at the factory. These settings may be re-programmed in the eld. Please contact
ONICON technical support personnel for assistance, if changes are required.
4.3 DISPLAY AND PULSE OUTPUT UNITS AND MULTIPLIERS
The units and multipliers are programmed prior to delivery. Contact ONICON’s technical support
personnel for assistance in changing units or multipliers.

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 19
4.4 BACnet NETWORK ADDRESSING
The BACnet MS/TP network requires 2 separate addresses in order to function.
The rst address is the MAC (station) address and may be set to any address from 001 to 254. In
compliance with the BACnet standard, addresses 128 to 254 are reserved exclusively for slave
devices. Slave devices cannot be auto-discovered on the network.
The second address is the device instance number (Node ID) and may be set to any address from
1 to 4,194,303. If the System-30 is provided with the optional user interface/display, the device
instance number may be set by entering the change address mode. The number may also be
changed via the BACnet network.
4.4.1 Changing the MAC Address
Every ONICON BTU Meter is individually programmed at the factory with application
specic data provided by the customer during the ordering process, and this may include
network addressing information. If MAC address information was provided, the Btu
meter will be programmed with that number. If no address is provided, ONICON BTU
Meters are programmed witha default MAC address of 017.
4.4.2 Changing the Device Instance Number
The number may be changed via the BACnet network. To change the device instance
number, rst connect the meter to the BACnet network. Power the meter and discover
the new device. The default network addresses are 017 (MAC) and 57017 (Device
Instance). Once the device is found on the network, write the new device instance number
to BACnet object AV13. Allow a few seconds for the new address to be written back to the
Btu meter and re-discover the device on the network.
NETWORK ADDRESS DIP SWITCH VALUES
SWITCH VALUE
A1 1
A2 2
A3 4
A4 8
A5 16
A6 32
A7 64
A8 128
ON

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System-30 BTU Measurement System BACnet MS/TP 01/09 - 0691 Page 20
DEVICE
ADDRESS
DIP SWITCH SETTINGS
12345678
1ON
2ON
3ON ON
4ON
5ON ON
6ON ON
7ON ON ON
8ON
9ON ON
10 ON ON
11 ON ON ON
12 ON ON
13 ON ON ON
14 ON ON ON
15 ON ON ON ON
16 ON
17 ON ON
18 ON ON
19 ON ON ON
20 ON ON
21 ON ON ON
22 ON ON ON
23 ON ON ON ON
24 ON ON
25 ON ON ON
26 ON ON ON
27 ON ON ON ON
28 ON ON ON
29 ON ON ON ON
30 ON ON ON ON
31 ON ON ON ON ON
32 ON
33 ON ON
34 ON ON
35 ON ON ON
36 ON ON
37 ON ON ON
38 ON ON ON
39 ON ON ON ON
40 ON ON
41 ON ON ON
42 ON ON ON
43 ON ON ON ON