Laars FT Series, Инструкция по установке и эксплуатации, Страница: 36 / 92

Page 36
4.13
High Altitude Installations. 2,000’ to 10,000’
#
Altitude of Installation
0 0~1999 ft (0~609 m)
1 2,000~4,499 ft (610~1,645 m)
2 4,500~7,699 ft (1,646~2,346 m)
4 7,700~10,000 ft (2,347~3,048 m)
1. With the Power
turned OFF, press the 'Modes
button' for 5 seconds to get into the Installer
Parameters Mode.
2. Turn the dial (E) until ‘
28:HA
’ appears.
3. Press the dial (E).
4. Set the high altitude value by turning the dial.
Refer to table.
5. Press the dial again (E) to save the setting.
6. Press the ‘Modes button’
for one second, to
Save the number and to go back to initial status.
The FT is shipped with a default factory setting for installation at an altitude of 0 to 2000’ (approx). For
maximum efficiencies at higher altitudes (2,000’ to 10,000’), the FT does have an adjustment in the
Installer Parameters Mode.
Follow these instructions if your installation is at 2,000’ - 10,000’.
14. It may be necessary to go back and forth
between HI Fire and LOW Fire several times (and
adjusting only at LOW Fire), before CO2 at both
are within acceptable levels. Be sure to put the
adjustment port cap screw back onto the valve
when done.
15 Once the CO2 and manifold pressure
measurements for both MIN and MAX Fire are
acceptable per Table C, set DIP switches 6 and
7 to the OFF position for Nominal Fire (normal
operation).
16. Remove your combustion analyzer from the Test
Port and be sure to thread the Test Port plug back
into position.
17. Re-connect outdoor reset if it was disconnected,
put the boiler cover back on and assemble/tighten
the 4 screws that hold the cover in place.