11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax (727)442-5699
www.onicon.com • sales@onicon.com
05-14
SAFETY INFORMATION
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i
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 specic 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 specied in this manual, the protection provided by this
product may be impaired.
The following symbols are used in this manual:
Messages identied as “Warning” contain information regarding the personal safety of
individuals involved in the installation, operation or service of this product.
Messages identied as “Caution” contain information regarding potential damage to the
product or other ancillary products.
Messages identied as “Important Note” contain information critical to the proper operation
of the product.
Only qualied service personnel should attempt to install or service this equipment. Serious
injury may result from the improper installation or use of this equipment.
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.
• 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.
• Auxiliary pulse input for totalizing pulse outputs from external devices such as water or
gas meters.
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 specic 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
Energy TotalBtuSNVT_btu_f
Energy RateWattsSNVT_power_f
Flow RateLiters/SecSNVT_ow_f
Supply Temperature°CSNVT_temp_f
Return Temperature°CSNVT_temp_f
Flow TotalLitersSNVT_vol_f
Auxiliary InputNo UnitsSNVT_count_f
BAUD RATE
78 kbps
INPUT SIGNALS
One isolated auxiliary pulse input for totalization
(Factory congurable for active pulse, open collector
sinking, open collector sourcing or dry contact pulses)
3 – 24V dc
50Hz maximum frequency
10msec minimum pulse duration
OPTIONAL LOCAL DISPLAY
Alphanumeric backlit LCD displays total energy, total, flow, energy
rate, flow 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: Specications are subject to change without notice.
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 identiers that you should have available when contacting the factory
for assistance regarding your system.
Each SYSTEM-30 generally ships in one package. Inspect all packages immediately upon receipt.
Notify ONICON and the freight carrier if the shipment arrives with evidence of damage in transit.
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
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 process connections to facilitate connection to the
piping system. A union with retaining nut makes up one end of each end piece. The
other end will either be a sweat tting for copper or a threaded nipple with male NPT
threads.
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.
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.
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 difcult 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 5 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 remote 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.
1. Make sure the unions are free of nicks or scratches on either end of the ow
meter body and on the process connections.
2. Spray the union faces with a silicone spray or apply a thin coat of beeswax to enhance
seating. Do not use paste thread sealant on union faces.
3. Orient the ow arrow on the meter with the direction of ow.
4. Recommended torques for union seal: 70 ft/lbs minimum
5. Make sure alignment of pipe does not put lateral stress on either joint.
CONTROL SYSTEM
CONTROL SYSTEM
LonTalk
BACnet MS/TP
NETWORK
NETWORK
24 VAC POWER
24V AC/DC
FAN COIL UNIT
OR
AIR HANDLING UNIT
Process
Connection
Unions
Process
Connection
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.
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.
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.
CAUTION
Cable length is specied 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.
All user supplied conduit ttings, junction boxes, etc. are to be installed as required by all
applicable building codes.
IMPORTANT NOTE
The System-30-LON 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
temperature. This relationship will reverse if the meter body is located in the return pipe. The
location 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.
3.3.1 Single Mode (4 Pipe) Vs. Dual Mode (2 Pipe) Operation
ONICON System 30 BTU Meters may be congured 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.
It is often desirable to totalize the amount of energy transferred in each mode in separate registers.
0333-2
1500 North Belcher Road, Clearwater, FL 33765 • Tel (727) 447-6140 • Fax (727) 442-5699
www.onicon.com • sales@onicon.com
01-13-09
For these applications, ONICON BTU meters may be congured for dual mode operation. In this
conguration, 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
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 congured 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 veried.
Aux Pulse Input
LON connections
}
}
4
-
+
5
1
Not used
2
3
TB4
CAUTION
Only qualied service personnel should make connections between the System-30-LON 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.
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 identies 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 11 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. Conrm that it is in the
expected range. Now select the RETURN TEMP page. Again note the displayed temperature.
Conrm that it is also in the correct range.
Select the FLOW RATE page. Note the displayed ow rate. Conrm 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.
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.
ENERGY TOTALBTU, TONHR or KWHR
FLOW TOTALGAL, LITER, METERS
ENERGY RATEBTU/HR, TONS, KW
FLOW RATEGPM, GPH, MGD, L/SEC, L/MIN, L/HR,
METERS
INTRN TEMPERATUREDEG F, DEG C
EXTRN TEMPERATUREDEG F, DEG C
Di3 PULSE TOTAL
ALARM STATUS
SERIAL NUMBER
DUAL MODE BTU METERS – RUN MODE DISPLAY PAGES
MODE 1 ENERGY TOTALBTU, TONHR or KWHR
MODE 1 FLOW TOTALGAL, LITER, METERS
MODE 2 ENERGY TOTALBTU, TONHR or KWHR
MODE 2 FLOW TOTALGAL, LITER, METERS
ENERGY RATEBTU/HR, TONS or KW
FLOW RATEGPM, GPH, MGD, L/SEC, L/MIN, L/HR,
INTRN TEMPERATUREDEG F, DEG C
EXTRN TEMPERATUREDEG F, DEG C
Di3 PULSE TOTAL
ALARM STATUSNOT APPLICABLE
SERIAL NUMBERNOT APPLICABLE
COUNTS or TEXT ENTRY
NOT APPLICABLE
NOT APPLICABLE
METERS
COUNTS or TEXT ENTRY
3
/HR
3
/HR
3
3
3
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.
The Btu meter contains two microprocessors, the heat computer board processor and the Echelon
TP/FT-10F transceiver with its Neuron processor. The TP/FT-10F transceiver is located on the
LON board. The two processors communicate with each other using a serial channel. This serial
channel device address is xed at 017 and cannot be changed.
4.4.1 LonWorks Network Addressing
Every Neuron processor has a unique 48 bit address kown as the Neuron ID. This address
is generally used as the Node ID. It is combined with the Domain ID and Subnet ID to form
the device address. In most installations, the device address is created dynamically by the
network.
4.5 COMMISSIONING THE SYSTEM-30-LON
Pressing the Service Pin on the LON board (see Appendix 6) generates a service pin message
on the network. The message contains the Neuron ID and the standard program identier
(SPID). The network conguration tool then maps the System-30-LON Neuron ID into the
domain/subnet/node ID addressing scheme for the network, creating the device address.
4.5.1 Service Pin LED States
The yellow service pin LED indicates the status of the Lon Talk network connection.
• LED blinking at ½ Hz rate indicates that the meter is in an decommissioned state.
• LED off indicates that the meter is commissioned and operating normally.
4.6 LONWORKS XIF FILES
Each System-30-LON BTU Meter is shipped with a diskette or CD containing the XIF le. It also
contains the Neuron executable le in various formats and documentation describing the
network variables in detail.
4.6.1 Output Network Variables
The System-30-LON BTU Meter transmits data to the network using Standard Network
Variable Types (SNVTs). Volume ow rate, and volume total are provided in oating point
format.
Display operating mode and mode status information is provided in ASCII character format.
The oating point output network variables are described in the table on the next page.
Column 1 contains a brief description of the network variables. Column 2 contains the
network variable names. Column 3 contains the Lon SNVTs used for each variable.
DescriptionVariable NameSNVT NameEngineering UnitsValid Range
Flow (volume) ratenvoVolRateLfSNVT_ow_fLiters/Sec0 to 10
Flow (volume) total -1nvoVol1LfSNVT_vol_fLiters0 to 10
Flow (volume) total -2nvoVol2LfSNVT_vol_fLiters0 to 10
Supply temperaturenvoSupplyTempfSNVT_temp_f° C-17.778 to 148.889
Return temperaturenvoReturnTempfSNVT_temp_f° C-17.778 to 148.889
Energy ratenvoEnrRateWfSNVT_power_fWatts0 to 10
*Displayed energy ratenvoDispEnrRatefSNVT_count_f*See note0 to 10
Energy total -1nvoBTU1fSNVT_BTU_fBtu0 to 10
*Displayed energy total-1nvoDispEnergy1fSNVT_count_f*See note0 to 10
Energy total-2nvoBTU2fSNVT_BTU_fBtu0 to 10
*Displayed energy total-2nvoDispEnergy2fSNVT_count_f*See note0 to 10
Auxiliary pulse input (Di3) nvoAuxIn1SNVT_count_fNone0 to 10
* These network variables transmit energy rate and total data exactly as it is displayed on the
optional System-30 front panel display (If ordered). The value transmitted will not include any
multiplier associated with displayed total.
12
12
12
12
12
12
12
12
12
12
The ASCII character status output network variables are described in the table below.
Column 1 contains a brief description of the network variables. Column 2 contains the
network variable names. Column 3 contains the Lon SNVT used for each variable.
Column 4 contains the ASCII single characters that may be transmitted by the meter
along with a description of what they indicate.
S = Single mode (83)
D = Dual mode (68)
B = Bidirectional mode (66)
N = Communication lost (78)
Mode status
indicator
nvoModeStatusSNVT_char_ascii
Z = Communication restored waiting for
update (90)
H = Heating mode (mode 1) (72)
C = Cooling mode (mode 2) (67)
* Systems that are not set to decode ASCII characters will display the decimal equivalent.
These values are shown in parentheses.
4.6.2 Integer Format Output Network Variables
ONICON provides rate and total data to the network in integer format for systems that
cannot accept the oating point data. Refer to Appendices A-8 and A-9 for information on
the use of integer format SNVTs.
The System-30-LON BTU Meter receives remote commands to reset totals from the
network using Standard Network Variable Types (SNVTs). The input network variables are
in ASCII format. They are used to zero the ow, energy and auxiliary pulse totals
transmitted in the output variables listed in section 1.7.1.
The ASCII character reset input network variables are described in the table below.
Column 1 contains a brief description of the network variables. Column 2 contains the
network variable names. Column 3 contains the Lon SNVT used for each variable. Column
4 contains the ASCII single characters that must be transmitted to the meter along with a
description of what they indicate.
Five input variable requests have been implemented. These are listed in the table
on the next page. Three of the requests are mandatory functions. They are
Normal, Update Mask and Report Mask. The other two are used to reset totals in
the Btu meter. They are Reset and Clear Reset.
The requests can be used on the node object or on selected function blocks. The
tables on the next page describe the requests and the function blocks associated
with totals in the Btu meter.
RQ_NORMAL0-27This request clears the status registers. Function block 0 clears
all function block status registers. Selecting function blocks 1- 27
only clears the selected status register.
RQ_UPDATE_MASK0-27This request updates the selected status register.
RQ_REPORT_MASK0-27This request displays the available Object Status functions.
RQ_RESET0, 3, 6, 17,
21, 27
This request zeroes the various ow, energy and auxiliary pulse
totals. If the Object ID 0 request RQ_RESET is selected then all
totals are cleared. If the Object ID of 3, 6, 17, 21 or 27 RQ_RESET
is selected then only the appropriate total is cleared.
RQ_CLEAR_RESET0, 3, 6, 17,
21, 27
This request clears reset status ags. Object ID of 0 clears all
SELECT FUNCTION BLOCKS, BTU METER TOTALS & BTU METER OPERATING MODES
Functional
Block
3Flow (volume) - 1Heat or CoolHeatingForward Flow
6Flow (volume) - 2InactiveCoolingReverse Flow
17Energy-1Heat or CoolHeatingForward Flow
21Energy-2InactiveCoolingReverse Flow
27Auxiliary Pulse (Di3)ActiveActiveActive
Btu Meter Total
SingleDualBidirectional
Btu Meter Operating Mode
4.6.4.2 nvoStatus
Six status object functions are mechanized to report status information to
the network. These are listed in the table below. The table also lists
function blocks associated with each status ag.
nvoStatus Object FunctionsFunctional Blocks
object_idAll
invalid_idAll
invalid_requestAll
comm_failure0
report_maskAll
reset_complete0, 3, 6, 17, 21, 27
4.6.5 Resetting Totals via the Network
Totals are held in non-volatile memory within the Btu meter. Each total (ow, energy or
auxiliary input) has a corresponding output variable that transmits the information from
the meter to the network. There are two ways to remotely reset totals in the display. This
can be done using individual input variables to command the display to reset specic
totals or it can be done using the nviRequest variable. Using nviRequest allows you to
reset each total individually or all totals simultaneously with one command. See sections
1.7.3 and 1.7.4.1 for specic instructions on how to reset totals.
The totals stored in the ow Btu meter memory will roll over to zero when the maximum
count is exceeded. When this occurs, the network totals will also roll over to zero. The
point at which the rollover occurs is a function of the displayed engineering units and
multipliers programmed into the System-30.
The examples below show the rollover point in the engineering units transmitted by the
network variable (SNVT) for common totals shown on the System-30-LON BTU Meter.
The ONICON System-30 BTU MEASUREMENT
SYSTEM uses a microprocessor to calculate
energy. Factory programmed settings provide
energy total outputs in accordance with the
customer’s application data. An optional
isolated analog output for energy rate, ow rate
or delta T may also be available. Refer to the
Btu meter calibration sheet for a complete listing
of factory settings. These settings cannot be
changed in the eld. Contact ONICON factory
service personnel if changes to the calibration
are required.
The System-30 is equipped with diagnostic
indicator lights that conrm the operation of
the microprocessor and its input circuitry.
Please contact the ONICON factory service personnel if either of the diagnostic lights
indicate a potential problem with the operation of the BTU MEASUREMENT SYSTEM.
4.7.1 Diagnostic Lights
Energy
Located on the end of main unit opposite the cable connection is a red LED labeled Btu.
This LED will ash as energy is transferred.
Liquid Flow
Located on the end of main unit opposite the cable connection is a red LED labeled FLOW.
This LED will ash at a rate that is proportional to the liquid ow rate. An unlit LED
indicates no ow signal.
Please read all installation instructions carefully before proceeding. Wiring diagrams are located
in the appendix. A worksheet for checking off these steps and recording measured values is
located on the following page.
1.Conrm main unit
location and adequate
straight pipe run to
achieve desired results
In order to proceed with the following steps, the System-30 must be operating and connected to the control
system. There must also be ow in pipes. Flow signal readings should be taken while holding the ow rate
constant if possible, otherwise, take the various output readings as quickly as possible.
2.Conrm correct supply
voltage
3.With the HVAC system
active, verify that the
diagnostic LED’s for
FLOW and BTU are
both ashing.
The following steps require a multi-meter with the ability to measure DC voltage as well as DC frequency in hertz.
Remove the six screws that secure the cover to the main unit and carefully lift the cover off.
4.Check temperature
readings for T1, T2
and the differential
temperature
Is the main unit located in the correct location as required by the plans?
Is the meter correctly oriented with respect to ow direction?
Compare actual straight pipe upstream and downstream of the main unit location
to the recommended distances identied in this installation manual. Note: This
manual is very conservative and assumes the worst-case pipe obstructions; contact
ONICON’s technical support department to discuss specics of your application
Verify that the correct supply voltage is available at the System-30 signal cable
connections. The System-30 BTU MEASUREMENT SYSTEM operates from 24 V
AC/DC.
The LED’s are located on the exterior of the main unit on the end opposite from the
cables.
Set multi-meter for 2 to 4 volt range
T2: (TB2) Measure DC volts between terminals 2(+) and 3(-)
T3: (TB3) Measure DC volts between terminals 2(+) and 3(-)
Delta T: (TB2-TB3) Measure DC volts between terminals 2 and 2
The relationship between voltage and temperature is 10 mV/degree F.
Multiply the reading in volts by 100 to obtain degrees F.
Compare the calculated temperatures to expected values and to the values shown
on the network.
5.Check ow signal
6.Check Energy Total
Output (BTU Output
Mode 1 and/or Mode 2)
End of standard commissioning. Please contact ONICON’s technical service department at (727)447-6140 with
any questions.
Set multi-meter for DC hertz, voltage range > 15 volts.
The test points for ow are located next to the reset button.
GPM = Frequency in Hz X 60
Meter Factor in ppg (refer to calibration tag for meter factor)
Compare the calculated ow rate to expected values and to the values shown on
the network.
Set multi-meter for ohms
Mode 1: Measure ohms between terminals 3 and 4
Mode 2: Measure ohms between terminals 5 and 6
Conrm that the voltage changes state (low to high or high to low) each time the
controls system register records a new energy total.
Please read all installation instructions carefully prior to proceeding with these steps.
Wiring diagrams are located in the appendix. Use the following worksheet for checking
off the commissioning steps and recording measured values:
STEPTEST / MEASUREMENT S/N:S/N:S/N:S/N:
1.Meter location
2.
3.
4.
5.
6.
TROUBLESHOOTING GUIDE FOR ONICON SYSTEM-30 BTU MEASUREMENT SYSTEMS
NOTE: Also refer to the COMMISSIONING GUIDE located on the preceding pages.
REPORTED PROBLEM:POSSIBLE SOLUTIONS:
No Flow Signal/ Energy
Signal
(While hydronic system
is active)
Displayed Flow Rate too
high or too low
Displayed Temperature
too high or too low vs.
expected values.
Device is not
communicating with the
Lon Talk network.
Communications with
the Lon Talk network is
intermittent.
For technical assistance, contact ONICON Incorporated at (727) 447-6140.
Supply voltage veried
Verify diagnostic LED’s
are ashing
Note and record
temperature readings for
T1, T2 & delta T
• Verify 24 VAC / VDC supply voltage to the System-30.
• Verify correct wiring to the System-30 (see wiring diagram).
• Check turbine for clogging due to debris.
• If none of the above, double check hydronic system to
ensure that ow is really present in the line.
• NOTE: Flow meter function cannot be veried by blowing on the turbine.
The sensing system requires a conductive liquid to operate.
• Verify that System-30 isolation valves are fully open and
bypass valve is fully closed (if bypass is used).
• Check turbine(s) for debris.
• Verify supply voltages.
• Verify that thermowell is inserted into the ow stream and
that the temperature sensor is completely inserted into the
thermowells.
• What is the state of the service pin LED?
• Is it ashing? A ashing service pin LED indicates that the Lon module
has not been commissioned. (See Appendix A-6)
• Is it off? A service pin LED that is off indicates that the Lon module is
commissioned and operating normally.
• Is the network properly terminated? The Lon TP/FT bus can be
terminated in 2 different ways.
• A single RC lter can installed at any point on a free topology network.
A dual termination scheme is used with 2 RC lters installed at the
ends of bus networks. (Refer to the Appendix A-7 for details.)
• What type of cable is used to wire the network? TP/FT networks
should only use twisted shielded pair cable. (Belden 85102 or equiv.)
Integer format output variables are limited to 2 bytes of data. For this reason, the maximum number that
can be transmitted in this format is 65,535. Values for both rate and total data from the Btu meter will often
exceed this limit. For this reason, energy rate data is scaled and energy totals are transmitted in segments
using multiple variables. This is explained in detail below.
Volume and Energy Rate Variables
The integer output network variables for volume and energy rate are described in the table below. Column
1 contains a brief description of the network variables. Column 2 contains the network variable names.
Column 3 contains the Lon SNVTs used for each variable. Column 4 contains the engineering units and
column 5, the valid range for each variable. Please note that while the oating point variable for energy
rate is transmitted in Watts, the integer network variable is transmitted in kW to ensure that the maximum
rate never exceeds the register capacity.
Integer Output Network Variables
DescriptionVariable NameSNVT NameEngineering UnitsValid Range
Flow (volume) ratenvoVolRateLiSNVT_owLiters/Sec0 to 65535
Mode status indicatornvoModeStatusSNVT_char_ascii
Supply temperaturenvoSupplyTempiSNVT_temp_p° C-17.778 to 260.0
Return temperaturenvoReturnTempiSNVT_temp_p° C-17.778 to 260.0
Delta temperaturenvoDeltaTempiSNVT_temp_diff_p° C-327.68 to 327.66
Energy ratenvoEnrRateKWiSNVT_power_kiloKWatts0 to 65535
Volume and Energy Total Variables
The integer output network variables for volume and energy total are described in the table below. Column
1 contains a brief description of the network variables. Column 2 contains the network variable names.
Column 3 contains the Lon SNVTs used for each variable. Column 4 contains the engineering units and
column 5, the valid range for each variable.
Please note that while the oating point variable for volume total is transmitted in liters, the integer
network variable for volume total is transmitted in kLiters. This is done to increase the maximum total
that can be transmitted via the integer variable. Total(s) must be reset before the accumulated value
exceeds 6553.5 kliters using nviResetVol1a and/or nviResetVol2a. If this is not done, nvoVol1KLi and/or
nvoVol2KLi will over range and continue to indicate 6,553.5 kliters (1,731,252 gallons) until the
System-10’s internal total rolls over to zero.
A separate integer SNVT is also available to transmit ow totals in liters. This variable is only used in
special small pipe applications as the maximum total it can accumulate is only 65,535 liters (17,312
gallons) before it must be reset.
Energy totals are handled in a slightly different way. The oating point variable for energy total is
transmitted in Btu but the integer network variable for energy total is MBtu. This total will over range at
65,535 MBtu. The internal total stored in the Btu meter will not roll over until it exceeds 99,999.99 MBtu.
In order to prevent the loss of data nvoMegaBTU1i and/or nvoMegaBTU2i must be reset before the
accumulated value exceeds 65,535 MBtu.
A second variable is available for energy totals. It is kBtu. This variable will roll over to zero whenever
the accumulated value exceeds 65,535 kBtu. This variable has been provided to accommodate small pipe
applications where MBtu is not appropriate. The two energy variables (MBtu and KBtu) can be combined
to produce a total with resolution to 1000 Btu (1kBtu). Programming for this calculation is given below.
Integer Output Network Variables
DescriptionVariable NameSNVT NameEngineering UnitsValid Range
* Flow (volume) total -1nvoVol1LiSNVT_volLiters0 to 65535
Flow (volume) total -1nvoVol1KLiSNVT_volKLiters0 to 6553.5
* Flow (volume) total -2nvoVol2LiSNVT_volLiters0 to 65535
Flow (volume) total -2nvoVol2KLiSNVT_volKLiters0 to 6553.5
Energy total -1nvoKiloBTU1iSNVT_btu_kiloKBtu0 to 65535
Energy total -1nvoMegaBTU1iSNVT_btu_megaMBtu0 to 65535
Energy total -2nvoKiloBTU2iSNVT_btu_kiloKBtu0 to 65535
Energy total -2nvoMegaBTU2iSNVT_btu_megaMBtu0 to 65535
* Special small pipe volume total variables
Totalizing Using Both the MBtu and KBtu Variables Combined
MBtu (Btu x 1,000,000) is value in nvoMegaBTU1i (or nvoMegaBTU2i)
KBtu (Btu x 1,000,000) is value in nvoKiloBTU1i (or nvoKiloBTU2i)
Combined total = MBtu x 1000 + X
Where X = KBtu - [int (KBtu/1000) x 1000]
Example:
nvoMEGABTU1i present value = 4006 MBtu
nvoKILOBTU!i present value = 6200 KBtu
Combined total = (4006 x 1000) + (6200 - [int(6200/1000) x 1000])
1. ACCEPTANCE: The following Conditions of Sale apply to all sales of ONICON’s products. These provisions shall apply even
CONDITIONS OF SALE
if ONICON fails to object to provisions appearing on, incorporated by, referenced in, or attached to Buyer’s purchase order
form. Buyer’s acceptance of delivery of ONICON’s products constitutes its acceptance of these Conditions of Sale.
2. DELIVERY AND TITLE: All product shipments are Ex Works shipping point and title passes to the Buyer at the time ONICON
delivers the merchandise to the carrier. Risk of loss or damage to the product passes to the Buyer at the time ONICON delivers
the product to the carrier. The Buyer immediately upon receipt should inspect all shipments, and should there be any evidence of
product will be free from defects in workmanship, and (iii) that ONICON has title to the product prior to shipment to the Buyer;
provided, however, that the warranties provided herein shall be void and may not apply in the event Buyer misuses or
damages a product, including, but not limited to, any use by the Buyer of a product for an application other than one of a type
approved by ONICON. ONICON’s sole liability and Buyer’s sole remedy for any breach of the foregoing warranty is for
ONICON to repair or replace, at ONICON’s option, any defective product that is returned to ONICON during the warranty
period. EXCEPT AS MAY BE SPECIFICALLY AGREED BY ONICON IN WRITING IN RELATION TO EACH SALE, NO
OTHER WARRANTIES SHALL APPLY, WHETHER EXPRESSED, IMPLIED OR STATUTORY, AND THERE SHALL BE NO
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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REPLACEMENT, AT ONICON’s OPTION, OF DEFECTIVE OR NONCONFORMING PRODUCTS. ONICON SHALL NOT BE
LIABLE FOR CONSEQUENTIAL, INDIRECT, PUNITIVE, INCIDENTAL, OR SPECIAL DAMAGES WHETHER FOUND ON
CONTRACT, TORT OR ANY OTHER THEORY OF LAW. No products shall be returned to ONICON without its prior consent
and transportation and insurance costs shall be prepaid. Any repair or replacement of ONICON’s products under the foregoing
warranty will be at no charge to the Buyer provided such repair is done at the ONICON factory or authorized service center.
ONICON products that are repaired or replaced under this warranty will be returned to Buyer via the same method of shipment
use to return the product to ONICON. Repair or replacement of ONICON products is conditioned upon ONICON’s
acknowledgement of any alleged defect or nonconformance during the warranty period and issuance of a Return
Authorization number. All product returns must reference the Return Authorization number on the outside of the shipping
carton and on any paperwork referencing the return.
5. PRICES AND PAYMENT TERMS: The prices set forth in the most recent quote or acknowledgement as applicable, supersede
allpreviouspricesorquotations.Allquotationsaresubjecttochangeorwithdrawalwithoutnoticeexceptasmaybespecicallynoted on the face of the quotation. The prices shown do not include sales, excise or government charges payable by ONICON to
Federal, State, or local authority. Any such tax or charge now or hereafter imposed upon the sale or shipment of the products
under this contract will be added to the purchase price. Buyer agrees to reimburse ONICON for such tax or charge or provide
ONICONwithanacceptableexemptioncerticate.Paymentofinvoiceswillbedue30daysfromthedateofshipmentoftheproducts contained therein. In the event that payment of an invoice is not received by the invoice due date, ONICON will assess
a late fee not to exceed 1.5% per month or 18% per year, or the maximum allowableby law whichever is lower.
6. CANCELLATION: Buyer may cancel its order, or any part of it, by sending written notice of cancellation to ONICON and
determined by ONICON. If Buyer received a reduced price based on the quantity of products ordered, but has not purchased
the applicable quantity at the time of cancellation, Buyer will pay the price it would have paid had ONICON’s sale price been
based on the quantity actually purchased.
7. CHANGES:IfBuyermakesanychangesinitsdrawings,designs,orspecicationsapplicableinanycontractwithONICON
that cause an increase or decrease in the cost of performance of the contract, or if such changes result in rework or obsolescence, an
equitable adjustment shall be made to the contract. Such changes are subject to ONICON’s prior written consent.
at current price or on account of shortages thereof, acts of God or of the public enemy, any existing or future laws or acts of the
FederalorStateGovernment(includingspecically,butnotexclusively,andorders,rulesorregulationsissuedbyanyofcialoragency of any such government) affecting the conduct of ONICON’s business with which ONICON in its judgment and discretion
deems it advisable to comply as a legal or patriotic duty, or due to any cause beyond ONICON’s reasonable control.
9. PATENTS: ONICON shall defend all suits or proceedings brought against Buyer or its customers arising from claimed
infringements of any patent, trademark, service mark or copyright for any product furnished by ONICON and shall indemnify it
againstallcosts,fees,anddamagesontheconditionBuyerpromptlynotiesONICONinwritingandprovidesinformationandassistance to enable ONICON to conduct the defense, provided that ONICON shall have no such obligation in case of
infringement resulting from ONICON’s conformance to special requirements of Buyer. If ONICON is not able to settle any such
suit or proceeding on acceptable terms, ONICON may, at its option, require return of the infringing product and refund the
purchase price to Buyer less a reasonable allowance for depreciation or use.
10. FAIR LABOR STANDARDS ACT: ONICON represents that all products delivered under this contract are furnished in
accordance with the applicable provisions of the Fair Labor Standards Act as amended.
11. APPLICABLE LAW: This document and any resulting contract shall be governed by and construed in accordance with the
laws of the State of Florida. The courts of the State of Florida and the federal courts located in Florida shall have jurisdiction
and venue with respect to litigation to this contract. In the event of litigation, the prevailing party shall be entitled to recover
attorney’s fees and costs from the non-prevailing party, including appellate attorney’s fees.
12. MODIFICATIONS: These Conditions of Sale along with the prices, quantities, delivery schedules and other provisions and
instructions in applicable quotations by ONICON or Buyer’s purchase orders accepted by ONICON shall constitute the entire