ONICON System-30 BTU - Manual (Page 9)

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System-30 BTU Measurement System Manual 05/14 - 0667-2 / 18335
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 email. 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. 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.