TSI IAQ50 - Manual (Page 19)

19
Details on the procedure are as follows:
Press the %OA key once to begin. To
choose a measurement mode (OA,
SUPPLY, RETURN
), use the 5 or 6
keys.
You may press TEMP or CO
2
at any time
to move from calculating %OA from
TEMP to CO
2
or from CO
2
to TEMP.
In return air mode, “RETURN” will
appear on the display. The current value
will show on the bottom line of the
display. The top line of the display will
show either dashes (if this is the first
time using %OA function or if the mem-
ory has been cleared) or it will show the
last value stored for return air. Press
READ/ENTER
once the reading has
stabilized.
The stored measurement will display on
the top line. This is the reading that will
be used to calculate percentage of out-
side air.