ONICON System-30 LonWorks BTU - Manual (Page 9)

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System-30 BTU Measurement System LON 05/14 - 0668-2 / 18337
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 fluid metering fields.
ONICON will be happy to assist with technical recommendations and to provide guidance by
telephone and/or mail. On-site field 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 difficult 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.
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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