ONICON System-10 BTU - Manual (Page 27)

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System-10 BTU Meter Manual 03/15 - 0651-16 / 18323 Page 27
4.5 SELECTING THE FLOW METER LOCATION & ENABLING/DISABLING FRONT PANEL RESET
Before the System-10 is commissioned, the flow meter location should be programmed into the
meter. This is particularly important for systems that will operate with delta temperatures ≥20 °F.
The default setting for the flow meter location is unknown. It should be changed to the location
setting that corresponds to the flow meter’s physical location in the piping system. Choose
supply when the flow meter is located in the pipe leading to the inlet to the heat exchanger and
return when the flow meter is located in the pipe leaving the outlet of the heat exchanger. Leave
the setting at unknown for bi-directional flow applications.
The table below explains how to designate the flow meter location and how to enable or disable
the front panel reset.
STEP ACTION REACTION COMMENT
1 With the Btu meter running,
open the front panel and
locate DEV ADD/PROG ENAB.
Press DEV ADD/PROG ENAB
and then release it. None. DEV ADD/PROG ENAB is
located in the lower left corner
of the Btu computer board. (see
appendix page A-14.)
2 Close the front panel.
3 Press the PROGRAM button. (If
you do not press the
PROGRAM button, the meter
will revert to the run mode after
5 minutes.) The Btu meter changes
to program mode and the
DEVICE ID page will
appear with the first digit of
the address flashing. The PROGRAM button is on the
front panel.
4 Press the PROGRAM button. The FM LOCN page appears
with UNKNWN defaulted as
the current location. The PROGRAM button is on the
front panel.
5 Press the SCROLL button. The setting will toggle
between UNKNWN, SUPPLY,
and RETURN. Choose the FM LOCN as
necessary.
6 Press the PROGRAM button. The FRONT PANEL RESET
page appears with the N or Y
flashing. The PROGRAM button is on the
front panel.
7 Press the SCROLL button. The setting will toggle
between N and Y. Enable or disable the FRONT
PANEL RESET as necessary.
8 Press the PROGRAM button. The SAVE CHANGES page
appears with the N
flashing. The new FRONT PANEL
RESET setting must be saved
to take effect.
9 Press the SCROLL button. The N changes to Y. The Y must be selected for the
new address to take effect.
10 Press the PROGRAM button. The new setting is saved and
the display reverts to the run
mode. The PROGRAM button is on the
front panel.