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SYSTEM-10 BTU METER
ONICON Incorporated 727.447.6140
Page 32 onicon.com
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.
4.5 SELECTING THE FLOW METER LOCATION & ENABLING/DISABLING 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.