The heater may be operated at different altitudes.
Although there are not any parts that need to be changed,
you must set the air adjustment ring at the burner to
compensate for the change in altitude.
1. Remove the upper shell at the fan end of the heater.
2. Using a 5 mm. allen key, loosen the locking screw at
the ring. Slide the ring along the burner to open or
reduce the air opening for the specific altitude. See
Fig. 9. and refer to the following table for settings.
FIG. 9
Setting for High Altitude
AIR OPENING SETTING
ALTITUDE
(FEET)
1/2 in.
1/4 in.
Up to 2,000
9/16 in. 5/16 in.
2,000 - 4,000
5/8 in
.
3/8 in
.
4,000 - 6,000
11/16 in.
7/16 in.
6,000 - 10,000
3/4 in.
1/2 in.
10,000 - 12,000
SCREW
AIR ADJUSTMENT RING
SLIDE RING FOR
PROPER AIR OPENING
DIRECTOR
100
DIRECTOR
300
13
AIR OPENING