Sterling RT - Manual (Page 20)

20
Figure 14
STANDARD CFM BLOWER
HIGH CFM BLOWER
A
A
A
B
Figure 15
A
A
B B
A A
KEY B PROJECTS TO PROVIDE A GRIP FOR REMOVING.
DO NOT OPERATE SHEAVE WITH FLANGE PROJECTING
BEYOND THE HUB END.
D3881
AIR BLOWER
Belt Tension Adjustment Standard CFM Blower belt
tension can be adjusted by loosening motor mounting
bolts marked A (See Figure 14). To tighten belt, slide
motor down motor mounting bracket and re-fasten motor
to mounting bracket.
High CFM Blower belt(s) tension can be adjusted by
fi rst loosening motor mounting plate bolts marked A
(See Figure 14). To tighten belt tension, turn belt tension
adjustment screws marked B (See Figure 14) counter-
clockwise. To loosen belt tension, turn clockwise. Once
belt tension has been adjusted, re-fasten motor mounting
plate bolts.
Blower RPM Adjustment
To adjust blower RPM:
1. Loosen and remove belt(s).
2. Match driver pulley to one found in Figure 15.
3. Loosen setscrew(s) marked A.
4. If driver pulley is equipped with external key, marked
B, remove.
5. Adjust driver pulley pitch diameter for desired speed
by opening (slower) or closing (faster) moving parts
by half or full turns. Do not open sheave past point
where fl ange projects past the hub end.
6. If driver pulley is equipped with external key, marked
B, replace.
7. Tighten setscrew(s) marked A.
8. Replace and retension belt(s).
9. Realign drive if necessary.