Onicon System-10 BTU Meter Operating instructions

11451 Belcher Road South, Largo, FL 33773 • USA • Tel [phone] • Fax [phone]
www.onicon.com • [email protected]
SYSTEM-10 BTU METER
Siemens P1-FLN Version
Installation and Operation Guide
NOTE: Also refer to Siemens’ Application Note, Document No. 140-0280
07-18
0656-11 / 18320
ON I CON
Flow and Energy Measurement

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System-10-P1 Manual 09/15 - 0656-11 / 18320 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:
!
!
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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-10-P1 Manual 09/15 - 0656-11 / 18320 Page 3
TABLE OF CONTENTS
1.0 INTRODUCTION ..................................................................................................5
1.1 PURPOSE OF THIS GUIDE ...................................................................... 5
1.2 TYPICAL SYSTEM-10 BTU METER ........................................................5
1.3 STANDARD FEATURES AND SPECIFICATIONS................................... 5
1.4 ADDITIONAL REQUIRED HARDWARE ..................................................7
1.5 WORKING ENVIRONMENT ....................................................................7
1.6 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
3.2.2.1 Standard Thermowells ..................................................11
3.2.2.2 Hot Tap Thermowells ....................................................11
3.2.3 Temperature Sensor Installation ..............................................13
3.2.4 Flow Meter Installation ............................................................ 14
3.3 ELECTRICAL INSTALLATION .........................................................................15
3.3.1 Input Power ...............................................................................15
3.3.2 Input Signal Connections..........................................................18
3.3.2.1 Input Signal Connections from Temperature Sensors..18
3.3.2.2 Input Signal Connections from Insertion Turbine........19
3.3.2.3 Input Signal Connections from F-2500 Meters.............19
3.3.2.4 Input Signal Connections from F-2600 & F-2700.........20
3.3.2.5 Input Signal Connections from F-3100 & F-3200.........20
3.3.2.6 Input Signal Connections from F-3500 Meters.............21
3.3.2.7 Input Signal Connections from FB-3500 Meters ..........21
3.3.2.8 Input Signal Connections from F-4200 Meters.............22
3.3.3 Contact Closure Output for Energy Total(s) and Mode ...........23
3.3.4 Isolated Analog Output(s) .........................................................24
3.3.5 Network Signal Connections ....................................................25
3.3.6 Optional Isolated Digital Pulse Input (Di3) .............................26
4.0 SYSTEM-10 START-UP AND COMMISSIONING ............................................29
4.1 DISPLAY AND KEYPAD OPERATION ...................................................29
4.2 PROCESSOR START-UP .........................................................................29
4.3 UNITS AND MULTIPLIERS ....................................................................30
4.4 ANALOG OUTPUTS ...............................................................................30
4.5 ENTERING A NETWORK ADDRESS, SELECTING THE FLOW METER
LOCATION & ENABLING / DISABLING FRONT PANEL RESET .........31
4.5.1 Application Number....................................................................32
4.6 SYSTEM-10-P1 POINT DATABASE .......................................................33
4.6.1 System-10-P1 Point Database .........................................................33
4.7 COMMISSIONING...................................................................................35

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System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 4
TABLE OF CONTENTS (CONTINUED)
5.0 DIAGNOSTICS ....................................................................................................39
5.1 DIAGNOSTICS.........................................................................................39
5.1.1 DIAGNOSTIC LIGHTS...................................................................39
5.1.2 FLOW TEST SIGNALS..................................................................39
5.1.3 TEMPERATURE TEST SIGNALS ...................................................39
5.2 ALARM STATUS MEUU .........................................................................40
5.3 TEMPERATURE TEST SIGNALS............................................................41
APPENDIX A – DRAWINGS
A-1 TYPICAL SYSTEM INSTALLATION
A-2 STANDARD THERMOWELL ASSEMBLY
A-3 THERMOWELL INSTALLATION
A-4/A-5 HOT TAP THERMOWELL (2 PAGES)
A-6 STANDARD INSTALLATION DETAIL FOR THERMOWELL
A-7 STANDARD INSTALLATION DETAIL FOR HEAVY DUTY THERMOWELL
A-8 TEMPERATURE SENSOR ASSEMBLY
A-9 MOTHER BOARD TEMPERATURE SENSOR INPUT CONNECTIONS
A-10 MOTHER BOARD INSERTION TURBINE METER INPUT CONNECTIONS
A-11 MOTHER BOARD INSERTION ELECTROMAGNETIC INPUT CONNECTIONS
A-12 MOTHER BOARD F-2500 INPUT CONNECTIONS
A-13 MOTHER BOARD F-2600 & F-2700 VORTEX INPUT CONNECTIONS
A-14 MOTHER BOARD INLINE ELECTROMAGNETIC INPUT CONNECTIONS
A-15 MOTHER BOARD F-3500 INPUT CONNECTIONS
A-16 MOTHER BOARD FB-3500 INPUT CONNECTIONS
A-17 MOTHER BOARD F-4200 INPUT CONNECTIONS
A-18 MOTHER BOARD
A-19 BTU COMPUTER BOARD
A-20 POWER SUPPLY BOARDS
A-21 P1 BOARD
A-22 P1 BOARD WITH AUXILIARY PULSE INPUT (Di3)
A-23 BTU METER ANALOG OUTPUT BOARD (with 1 analog output)
A-24 BTU METER ANALOG OUTPUTS BOARD (with 4 analog outputs)
A-25 CONDITIONS OF SALE

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System-10-P1 Manual 09/15 - 0656-11 / 18320 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-10 BTU Meter equipped with a
Siemens Floor Level Network Communications Driver and Point Database.
NOTE: Also refer to Siemens’ Application Note, Document No. 140-0280.
1.2 TYPICAL SYSTEM-10 BTU METER
ONICON’S System-10 is a true heat (BTU) computer, which accepts data from several sensors,
performs a series of computations with that data, and displays and/or transmits the results as an
indication of the amount of heat (BTU’s) being transferred per unit time or as a totalized amount.
!
1.3 STANDARD FEATURES AND SPECIFICATIONS
• Single mode BTU calculations, in either the heating or cooling mode, are totalized,
displayed and reported to the P1 network.
• Two-pipe dual mode BTU calculations in both the heating mode and the cooling mode are
totalized, displayed and reported separately to the P1 network.
• B-directional dual mode BTU calculations are totalized, displayed and reported separately
to the P1 network.
WARNING
Only qualied service personnel should attempt to install or service this product. Serious injury
may result from the improper unstallation or use of this product.

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System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 6
GENERAL SPECIFICATIONS
CALIBRATION
Flow meter and temperature sensors are individually
calibrated, followed by a complete system calibration.
Field commissioning is also available.
ACCURACY
TEMPERATURE
Overall differential temperature measurement uncertainty of
≤ ± 0.15 °F over the stated range
(Includes uncertainty associated with the sensors,
transmitters, cabling and calculator input circuitry)
Temperature sensors meet EN1434 / CSA C900.1 accuracy
requirements for 1K sensors for cooling applications, 32 – 77 °F
Temperature sensors meet EN1434 / CSAC900.1 accuracy
requirements for 2K sensors for heating applications, 140 – 212 °F
CALCULATOR
Computing nonlinearity within ±0.05%
Calculator meets EN1434 / CSAC900.1 class 1 accuracy
requirements for 2K sensors for all applications
TEMPERATURE SENSORS
Solid state sensors are custom calibrated using N.I.S.T.
traceable temperature standards.
Current based signal (mA) is unaffected by wire length.
PROGRAMMING
Factory programmed for specic application
MEMORY
Nonvolatile EEPROM memory retains all program
parameters and totalized values in the event of power loss.
DISPLAY
Alphanumeric LCD displays total energy, total ow, energy
rate, ow rate, supply temperature and return temperature
Alpha: 16 character, 0.2” high
Numeric: 6 digit, 0.4” high
P1 OUTPUT POINTS
Name Point Type/
Category
Units
Total Energy 3/LAI BTU, kW-hrs or ton-hrs
Energy Rate 1/LAI BTU-hr, kW or tons
Total Flow 3/LAI gallons, liters or meters3
Flow Rate 1/LAI gpm, gph, mgd, l/s, l/m, l/
hr or m3/hr
Supply Temperature 1/LAI °F or °C
Return Temperature 1/LAI °F or °C
Delta T 1/LAI °F or °C
Energy Total Reset 1/LDO Not applicable
Flow Total Reset 1/LDO Not applicable
Auxilliary Input 1 3/LAI Pulse Accumulator
Auxilliary Input Reset 1/LDO Not applicable
ADDITIONAL OUTPUT SIGNALS
Standard: Isolated solid-state dry contacts for energy total
Maximum contact ratings: 100 mA, 50VDC
Contact duration: 0.5, 1, 2 or 6 seconds
(factory selectable)
Optional: Multiple isolated analog outputs for energy rate,
ow rate, supply and return temperatures and delta T
(factory selectable)
Output type: 4-20mA, 0-10 volt or 0-5 volt
(eld selectable)
Optional Interval Data Logging:
This option provides up to 24 hours of rate and
total data logging in 15 minute intervals. Data
includes date/time stamp, measured value &
scaling factors when appropriate.
LIQUID FLOW SIGNAL INPUT
0-15 V pulse output from any ONICON ow meter
TEMPERATURE RANGE
Liquid temperature range: 32° F to 200° F
Optional extended temperature range available.
Ambient temperature range: -20° F to 140° F
MAINTENANCE
ONICON recommends periodic inspection and recalibration
for sensors connected to the System-10 BTU Meter. No other
periodic maintenance is required for the main unit.
MECHANICAL
ELECTRONICS ENCLOSURE:
Standard: Steel NEMA 13, wall mount, 8”x10”x4”
TEMPERATURE SENSOR THERMOWELLS:
Standard: ½” NPT brass thermowells (length varies with
pipe size) with junction box
Note: 6” pipes and larger require SS thermowell option
Optional:
• ½” NPT stainless steel thermowells
• Outdoor junction box with thermal isolation
• Hot tap thermowells for installations in a pressurized
system with no shutdown
ELECTRICAL
This equipment is intended for INSTALLATION CATEGORY
(OVERVOLTAGE CATEGORY) II applications.
INPUT POWER:
Factory Selectable:
24 ±4 VAC 50/60 Hz, 500 mA
120 VAC 50/60 Hz, 250 mA
230 VAC 50 Hz, 250 mA
INTERNAL FUSE RATINGS:
24 VAC - 1 Amp Slo-Blo, 3AG Fuse
120 VAC - 1/4 Amp Slo-Blo, 3AG Fuse
230 VAC - 1/8 Amp Slo-Blo, 3AG Fuse
OUTPUT:
24 VDC, 250 mA maximum
OVERCURRENT PROTECTIVE DEVICE RATINGS:
Supply mains overcurrent protective devices with the
following ratings:
120 VAC 50/60 Hz – 15 A
230 VAC 50 Hz – 6 A
WIRING:
Temperature signals: Use 18-22 ga twisted shielded pair
Flow signals: Use 18-22 ga shielded cable – see Flow Meter
Specication Sheet or Owner’s Manual for ONICON
Insertion Turbine Flow Meter for the correct number of
conductors
24 ±4 VAC input power: 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 building codes.
120/230 VAC input power: Use a three wire service with one
wire protective earth ground. 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-10-P1 Manual 09/15 - 0656-11 / 18320 Page 7
1.4 ADDITIONAL REQUIRED HARDWARE
ONICON offers a wide variety of ow meters to satisfy most hydronic energy metering applications.
Model F-1100 Single Turbine Insertion Flow Meter
For line sizes 1¼” and larger with 25 diameters of straight pipe run available for
installation. (F-1100 can also be used with 1” copper lines.)
Model F-1200 Dual Turbine Insertion Flow Meter
For line sizes 2½” and larger with 15 diameters of straight pipe run available for
installation.
Model FB-1200 Bi-Directional Insertion Flow Meter
For bi-directional ow applications in line sizes 2½” and larger with 20 diameters of
straight pipe run available for installation.
Model F-1300 Inline Turbine Flow Meter
For line sizes ¾” and 1” with 25” of straight pipe run available for installation.
Model F-3500 Insertion Electromagnetic Flow Meter
For line sizes 3” and larger. (See F-3500 manual for straight run requirements).
Model F-26** Inline Vortex Flow Meter
(Suitable for use in higher temperature applications).
For line sizes 1” through 12” (See Vortex Flow Meter manual for straight run requirements).
Model F-31** / F-32** Inline Electromagnetic Flow Meter
For line sizes ¼” and larger with 5 diameters of straight pipe run available for installation.
Please refer to ONICON’s ow meter literature, or contact ONICON for help in selecting
the ow meter that will best t your requirements.
1.5 WORKING ENVIRONMENT
The SYSTEM-10 was designed for installation and use in typical industrial environments that are
free of corrosive liquids and fumes, direct liquid exposure, temperature extremes and vibrations.
Do not expose the meter to direct sunlight.
The operating ambient air temperature range is -20° F to 140° F. The electrical power should be
relatively clean, free of high frequency noise, large voltage transients, and protected from power
surges and brown outs.
1.6 WARRANTY & SERIAL NUMBER
Warranty
ONICON’s 2-year “No-fault” warranty reduces start-up costs by extending coverage for
incidental damage during installation. Certain exclusions apply. Please refer to ONICON’s
Conditions of Sale for details.
Serial Number
The serial number of your SYSTEM-10 is located outside and inside the main unit. All
components of your SYSTEM-10 (ow meter, temperature sensors, and main unit) should bear
identical serial numbers if ordered together. The serial numbers are unique identiers that you
should have available when contacting ONICON for assistance regarding your system.

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System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 8
SECTION 2.0: UNPACKING
The SYSTEM-10 is generally shipped in one package unless optional hardware or equipment is
ordered. (Thermowells may have been shipped in advance.) Notify the freight carrier (all products are
shipped insured) and ONICON if any items are damaged in transit.
NOTE: Flow meters are packed separately.
2.1 CHECKING THAT YOU HAVE RECEIVED EVERYTHING
• Standard Documentation
Enclosed with each SYSTEM-10 is a comprehensive documentation package that includes
the following items:
The SYSTEM-10 BTU Meter Installation and Operation Guide
The BTU Meter Certicate of Calibration
Please notify ONICON if any of these items are missing.
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• The Main Unit
Remove the SYSTEM-10 from the shipping carton and inspect it for physical damage.
When you complete the external inspection, open the SYSTEM-10 main unit and remove
the plastic bag containing the temperature sensors. Inside the main unit there are at least
three circuit boards (the number may vary according to the options purchased). Ensure
that the boards and connectors are securely plugged into the mother board (Appendix
A-13). Please notify ONICON immediately if you nd any discrepancies.
• Temperature Sensors
Temperature sensors are shipped inside the main unit. Inspect the sensors and cables for
external damage. Each sensor should have a label attached with a serial number identical
to that found on the SYSTEM-10 main unit.
• Temperature Thermowells
Note that thermowells and installation hardware are frequently shipped in advance of the
meter(s). Otherwise, the standard thermowells and installation hardware are packed with
the main unit. Optional hot tap thermowells will be shipped in a separate box.
• The Flow Meter
The ow meter calibrated with this BTU meter came complete with an instruction manual.
Please refer to the ow meter instruction manual for detailed information regarding the
installation, commissioning, and operation of the ow meter.
Each BTU meter is calibrated to a specic ow meter and must be used together as a
system. If the ow meter and BTU meter were purchased together, the serial number on
the ow meter should match the serial number on the label mounted directly on the BTU
meter.
IMPORTANT NOTE
The ONICON System-10 BTU Measurement System is a custom calibrated system. Unless
specically noted in writing by ONICON, ALL COMPONENTS (Btu meter, ow meter, and
temperature sensors) share the same serial number and must be instaled together as a system.
Mixing components from different systems will result in signicant errors in calibration.

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System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 9
SECTION 3.0: INSTALLATION
The SYSTEM-10 BTU Meter should be installed by experienced plumbers, electricians, 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 email. On-site eld
engineering, installation, and service are also available at an additional cost. The installer should use good
trade practices and must adhere to all state and local building, or other, applicable codes.
Before you begin, clean the external surfaces of all pipes at the installation sites so that they are free of
debris, foreign matter, solids, leak inhibitors, and chemically aggressive substances. Flush the entire
system so that it is free of ux, solder, pipe and tube cuttings and any other free moving particles.
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 ow meter where it will be difcult for personnel to perform periodic
maintenance. When selecting a site for mounting the system components, consider the criteria
under Section 1.5: WORKING ENVIRONMENT, as well as the following:
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IMPORTANT NOTE
Proper site selection is critical to the performance of this Btu meter. Both the ow meter and the
two temperature sensors must be properly located within the piping system in order to ensure an
accurate energy measurement.
•The Main Unit
Find an easily accessible location where wire connections can be made and meter readings
can be taken from oor level. Mount the System-10 enclosure on a vibration free surface.
Avoid locations such as the plenum of a fan coil, heat exchanger or any housing that may
contain electric motors or other strong sources of electrical interference.
• The Flow Meter
When properly installed, the ow meter will only measure ow associated with that
portion of the piping system for which the energy measurement is being made. The ow
meter may be installed in either the supply or return line. Choose the location with the
longest straight run of unobstructed pipe. Please refer to the ow meter installation
manual for specic information regarding the straight run requirements for the ow meter
used with this SYSTEM-10 BTU Meter.
• The Temperature Sensors
The two temperature sensors must be located in such a manner as to accurately measure
only the temperature of the supply line entering and the return line leaving the portion of
the piping system for which the energy measurement is being made.
If possible, nd an easily accessible location where wire connections can be made from
oor level. This will facilitate any future service. Place the temperature sensors away from
strong sources of electrical noise that might affect the performance of the sensors.
One temperature sensor thermowell will need to be placed in the same pipe with the ow
meter. It should be located on the downstream side of the ow meter. The downstream
distance between the thermowell and ow meter should be at least ve pipe diameters,
leaving enough clearance to remove either sensor from the pipe without interference from
the other sensor.

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3.2 MECHANICAL INSTALLATION
3.2.1 Main Unit Installation
• Find an easily accessible location where electrical
connections can be made and meter readings can be
taken from the oor level.
• Mount the BTU meter on a vibration-free surface.
Avoid sites such as the plenum of a fan coil, heat
exchanger, or other housings containing motors.
Do not install the meter in direct sunlight.
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IMPORTANT NOTE
The ONICON System-10 BTU Measurement System is a custom calibrated system. Unless
specically noted in writing by ONICON, ALL COMPONENTS (Btu meter, ow meter and
temperature sensors) share the same serial number and must be installed together as a system.
Mixing components from different systems will result in signicant errors in calibration.
2.500
1.750
1.750
3.250
3X 01.115
01.115
2.500
6.000
CONDUIT HOL LOCATION
BOTTOM VIEW
HINGE SIDE
SOWN FOR REFERENCE.
CONDUIT HOL LOCATION
RIGHT SIDE VIEW
!
CAUTION
DO NOT drill holes in the main unit. Use only the openings that are provided.

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System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 11
3.2.2 Thermowell Installation
3.2.2.1 Standard Thermowells
Standard thermowells are for new construction or scheduled shutdown. The most
common installation methods are shown below. Refer to Appendix-6 for thermal
insulator installations and Appendix-7 for high temperature (>300° F) thermowell
installations. Consult ONICON for special applications.
NOTES: 1. Thermowell length varies with pipe size.
2. Use no additional bushings to ensure that tip of thermowell is inserted into ow stream.
3.2.2.2 Hot Tap Thermowells
Hot tap thermowells are designed for retrot applications where it is not practical
to isolate and drain the pipe section prior to installation. The thermowell is
installed through a 1” full port ball valve as shown in the drawing below. A wet
tap drilling machine equipped with a 7/8” drill is required to perform this type of
installation.
Install the valve assembly as shown in the drawing and then drill the 7/8” hole
using the wet tap drilling machine. Once the valve assembly has been installed
and the hole has been drilled, the thermowell can be inserted into the ow stream
without a system shutdown.
IMPORTANT NOTE
It is important that no dirt or other foreign material be allowed into the thermowells as this could
affect the thermal response of the system.
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!
WARNING
SYSTEM MAY BE UNDER HIGH PRESSURE. Be sure to hold the conduit box rmly by hand before
slowly loosening the position clamping nut when installing, adjusting or removing the thermowell.
Failure to do this will allow the pressure to suddenly and rapidly force the thermowell from the
pipe, potentially causing serious injury. The thermowell could also be damaged or break apart
causing a break in the water seal with the resultant loss of large amounts of water.

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Insertion of the Hot Tap Thermowell
1) Calculate the insertion force (lbs) required by multiplying the system pressure
(psig) by 0.11. The person inserting the thermowell should ensure adequate
footing for the force required prior to opening the valve.
2) Thread the hot tap adapter into the valve. Firmly grasp the wiring enclosure,
loosen the position clamping nut, open the valve, and carefully push the
thermowell into the ow stream. Use the attached gage to set the insertion depth.
3) Carefully tighten the position clamping nut that is located at the top of the 1”
NPT hot tap adapter tting. Do not release the wiring enclosure until the position
clamping nut has been tightened.
!
CAUTION
Excessive vibration can damage the thermowell. Insert the thermowell to the proper depth using
gauge supplied as shown. Reduce the insertion depth as necessary if strong vibrations are felt
during insertion, making certain that the tip of the thermowell remains fully in the ow stream.
!
CAUTION
DO NOT OVER TIGHTEN THE POSITION CLAMPING NUT. If uid leaks, do not attempt to
correct by tightening this nut further. An internal o-ring seals the uid. Contact ONICON for
assistance in the event of a leak.

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System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 13
Removal of the Hot Tap Thermowell
1) System pressure will try to push the thermowell out of the ow stream when the
clamping nut is released. Be sure to establish safe footing prior to loosening the
clamping nut. The force pushing out against the thermowell is the same as the
insertion force calculated above.
2) Grasp the wiring enclosure rmly, holding the thermowell in the pipe and then
loosen the position clamping nut. Slowly withdraw the thermowell from the pipe.
After the thermowell is completely withdrawn, carefully close the isolation valve.
!
WARNING
Maintain a rm hold on the wiring enclosure until the thermowell is completely withdrawn and
the valve is closed.
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IMPORTANT NOTE
Rotating the thermowell as you slowly withdraw it through the valve will ensure that the lower
tip is fully withdrawn and completely free of the valve. If resistance is felt when closing the
valve, open valve fully and rotate the well as you pull it further out of the pipe.
3.2.3 Temperature Sensor Installation
The temperature sensors are factory matched and tagged by serial number to a specic
BTU meter. They are also labeled as SUPPLY and RETURN temperature sensors. Please
consult ONICON before attempting to use any other temperature sensor.
Apply a thin coat of thermal compound 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 nut. DO NOT OVER TIGHTEN. The thermowell
completely seals the plumbing system without the retainer nut. The only purpose for the
nut is to keep the sensor from losing contact with the bottom of the thermowell cavity.
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IMPORTANT NOTE
Cable length is specied at time of order. Cable provided for temperature sensors is #22 gauge
twisted shielded pair. Additional cable may be added in the eld if necessary, but must be of
twisted shielded pair construction. (#22 gauge minimum and #18 gauge maximum)

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System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 14
3.2.4 Flow Meter Installation
Determine which pipe (supply or return) has the longer unobstructed straight run. Install
the ow meter in the longest straight pipe run available. One temperature sensor can be
installed ve diameters downstream of the ow meter leaving enough clearance to remove
either sensor from the pipe without interference from the other sensor.
Also refer to the installation manual and/or other documentation that is provided with
your ONICON ow meter.
For F-1300 series inline turbine ow meters, refer to the documentation that is provided
with the ow meter.
ONICON TEMPERATURE SENSOR
TEMPERATURE SENSOR INSTALLED IN THERMOWELL

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System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 15
3.3 ELECTRICAL INSTALLATION
3.3.1 Input Power
All user supplied conduit ttings, junction boxes, etc. are to be installed at this time as
required by legal codes. Note that input power can be 24 VAC, 120 VAC or 230 VAC.
(Not user selectable)
OPERATING FROM 120 or 230 VAC MAINS POWER
Utilize an electrically clean power line, free of electrical noise and protected from high
voltage spikes, power surges, and brownouts. The power source should be a separate line
with its own circuit breaker or circuit protection device. Refer to Section 1.3 of this
manual for the appropriate over current device ratings. Use a three-wire service in which
one wire is a protective earth ground.
!
WARNING
Conduit openings in the System-10 enclosure must be closed with UL listed ttings applicable to
NEMA 13 enclosures.
i
IMPORTANT NOTE
This option is not eld selectable. Contact ONICON if you need to change the input voltage rating.
!
!
!
WARNING
The protective earth connection must be made as shown. Failure to do so will result in an
increased risk of injury.
WARNING
All mains voltage connections must be made through pre-drilled conduit/strain relief opening
located at the bottom of the enclosure. Failure to do so will result in an increased risk of injury.
CAUTION
This product must be connected to earth ground for proper operation. Failure to do so may result
in erratic operation.

11451 Belcher Road South, Largo, FL 33773 • USA • Tel [phone] • Fax [phone] • [email protected]
System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 16
Connect the power source to the main unit through the conduit opening located on the
bottom of the main unit. Fasten the power wires to the appropriate screw terminals as
shown. Do not exceed 13 in-lb (1.5 Nm) of torque when tightening.
As power is initially applied to the System-10, immediately conrm that the power light is
illuminated and the display is scrolling through the character diagnostic test. The test will
begin by indicating the letter P in every position followed by a countdown from 9 to 0 for
each digit, If this does not occur, disconnect power immediately and re-verify all wiring
connections. If the problem persists, contact ONICON.
J1
5
G
60HZ
1
J2-1
+15 +24
J2-12
G G
10
R7
H3
R1
20075-50 REV. A
LED1
T1
D1
D2
VAR1
F1
TB1
D4
D3
H1
1
R1
20075-50 REV. A
F1
TB1
L1 N Not Used
1/4 AMP
1/4 AMP
L1 N Not Used
WARNING
Disconnect mains power before proceeding.
!
!
WARNING
Connect the protective earth wire to the lug located in the lower left hand corner of the motherboard.

11451 Belcher Road South, Largo, FL 33773 • USA • Tel [phone] • Fax [phone] • [email protected]
System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 17
OPERATING FROM 24 VAC POWER
The SYSTEM-10 BTU Meter can be congured to operate from 24 ±4 V 50/60 Hz power.
Connect the 24 volt power source to the System-10 using the pre-drilled conduit or strain
relief opening located at the bottom of the enclosure. Do not connect the 24 volt source
until all signal connections have been made and veried. Connect 24 VAC wires to the
appropriate screw terminals as shown. Connect the protective earth wire as shown. Do not
exceed 13 in-lb (1.5 Nm) of torque when tightening.
As power is initially applied to the System-10, immediately conrm that the power light is
illuminated and the display is scrolling through the character diagnostic test. The test will
begin by indicating the letter P in every position followed by a countdown from 9 to 0 for
each digit. If this does not occur, disconnect power immediately and re-verify all wiring
connections. Contact ONICON if the problem persists.
J1
5
G
60HZ
1
J2-1
+15 +24
J2-12
G G
10
R7
H3
R1
20075-50 REV. A
LED1
T1
D1
D2
VAR1
F1
TB1
D4
D3
H1
1
R1
20075-50 REV. A
F1
TB1
3/4 AMP
3/4 AMP
L1 N Not Used
L1 N Not Used
IMPORTANT NOTE
This option is not eld selectable. Contact ONICON if you need to change the input voltage rating.
i
!
CAUTION
This product must be connected to earth ground for proper operation. Failure to do so may result
in erratic operation.
Protective Earth
Ground

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System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 18
3.3.2 Input Signal Connections
Make connections on the mother board, located in the main unit, at terminal strips
T3, T4 and T5. Do not exceed 4.5 in-lb (0.5 Nm) of torque when tightening.
3.3.2.1 Input Signal Connections from Temperature Sensors
* Reference (Black)
* Reference (Black)
* Signal (Red)
* Signal (Red)
* Shield
Temperature Inputs
Supply temperature
Sensor
Return temperature
Sensor
L1 N Not Used
!
CAUTION
Shield connections are required for proper operation. Failure to use shielded cable may result in
erratic operation.

11451 Belcher Road South, Largo, FL 33773 • USA • Tel [phone] • Fax [phone] • [email protected]
System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 19
3.3.2.2 Input Signal Connections From Insertion Turbine Flow Meters
ONICON turbine ow meters are provided with a number of different output
congurations. These affect the number of wires contained in the cable attached
to the ow meter. Refer to the diagram below and the laminated tag attached to
the ow meter for specic details.
3.3.2.3 Input Signal Connections From F-2500 Flow Meters

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System-10-P1 Manual 09/15 - 0656-11 / 18320 Page 20
3.3.2.5 Input Signal Connections From Inline Electromagnetic Flow Meters
J1
5
G
60HZ
1
J2-1
+15 +24
J2-12
G G
10
R7
H3
R1
20075-50 REV. A
LED1
T1
D1
D2
VAR1
F1
1 AMP
TB1
D4
D3
H1
1
Analog Common -
* Frequency -
* Frequency +
4-20mA +
(B) Scaled +
(B) Scaled -
Flow Meter Inputs
* Shield
Auxiliary Flow Meter Signals
Earth
(A) Direction +
(A) Direction -
Terminal #
* (+) Pulse Output # 1
* (-) Pulse Output # 1
16
17
(+) Pulse Output # 2
(-) Pulse Output # 2
18
19
(+) 4-20mA Output
(-) 4-20mA Output
9
10
(+) Pulse Output # 2
(-) Pulse Output # 2
18
19
NOTE: The System-10 does not provide power to the F-3100 or F-3200 flow meter. Input power for the flow
meter must be provided separately. See flow meter manual for detailed wiring instructions.
Connections shown with * are required for all models. Connections shown with (A) are required for bi-directional
flow installations. Connections shown with (B) are for unidirectional installations.
Inputs &
Outputs
T4
1
2
3
4
5
6
7
8
9
10
11
12
13
T5
1
2
3
4
5
6
F-3100 and F-3200 Flow Meter
Terminal Connections
L1 N NotUsed
CAUTION
Shield and earth connections are required for proper operation. Failure to use shielded cable or
to connect earth to both the ow meter and System-10 may result in erratic operation. Shields
should be terminated at the System-10 shield terminals and left unterminated at the ow meter.
!
CAUTION
The System-10 internal 24 V power supply cannot provide power to the F-3100 or F-3200 ow
meters.
!
3.3.2.4 Input Signal Connections From F-2600 & F-2700 Flow Meters
* 4-20mA -
* 4-20mA +
F-2600 Flow Meter
Connections
(A) Scaled +
(A) Scaled -
Flow Meter Inputs
* Shield
Auxiliary Flow Meter Signals
* Earth
Output
Terminals
Loop power +
Loop power -
Pulse out +
Pulse out -
* Earth
Connections shown with * are required for all installations. Connections shown with (A) are optional.
L1 N Not Used