Onicon System-10 BTU Manuel d'utilisateur télécharger pdf (Page 9)

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System-10 BTU Meter Manual 03/15 - 0651-16 / 18323 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:

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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Onicon System-10 BTU Manuel d'utilisateur Page 9

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