Railway Equipment 934, Operating Manual

Page: 13 / 62

P/N R9340-0104 13 © 2010 RAILWAY EQUIPMENT CO.
REV B
5/11
13. Adjustable air intake screens. To start the GHAB in a new location, set the
intake screens in the closed position. If there proves to be a moisture problem
where frost builds up on the intake screens, the intake screens can be set in the
open position to improve the airflow into the blower.
14. The airflow switch differential setting is factory set on “D” which is for
elevations below 2000 ft. If your location is set at a higher elevation,
This differential setting will need to be adjusted. Adjust per the
following instructions:
a. Remove the galvanized cover over the airflow switch.
b. Remove the cover from the airflow switch.
c. Adjust the differential wheel on the base of the airflow switch as
follows:
Below 2000 ft elevation, set Airflow Differential Wheel to “D”
Below 4000 ft elevation, set Airflow Differential Wheel to “C”
Below 6000 ft elevation, set Airflow Differential Wheel to “B”
Above 6000 ft elevation, set Airflow Differential Wheel to “A”
C. POINT NOZZLES AND TRACK DUCTS
REFER TO THE GHAB POSITIONING DRAWING FOR TRACK DUCT
AND POINT NOZZLE POSITIONS.
LH AND RH POINT/TRACK NOZZLE ASSEMBLIES
1.
Attach point/track nozzle assembly RH (P/N 9508-4000) and point/track nozzle
assy LH (P/N 9508-4001) to the openings in the tie duct. Position assemblies for
proper airflow direction.
2.
Assemble the individual track duct sections into two complete track duct sections.
The mid and heel sections contain splices wrapped around the outside of the duct.
Unhook the clips to remove the three cover pieces. The bottom can now be
removed from the duct.
To assemble the splice:
a. Center the bottom splice piece on the seam between the two track
ducts.
b. Connect the center cover piece over the seam. (NOTE: The center
cover piece has slots to contain the bolts on the track duct).
c. Finally, connect the two end cover pieces.