York XT AHU - Controls

JOHNSON CONTROLS
86
FORM 102.20-OM2
ISSUE DATE: 6/01/2015
SECTION 4 - SERVICE AND REPAIR
Both flanges of a two-groove sheave
MUST be adjusted evenly.
13. Locktheadjustableange(s)inpositionbytight-
ening the set screw(s) to the proper torque value.
14. To prevent damage to the central sleeve threads,
thesetscrewsMUSTbeoveroneoftheatareas
ofthecentralsleeve.Iftheangeisnotproperly
locked, the sheave will fail rapidly.
15. Install the belts and tighten properly.
16. Recheck the alignment and speed.
Adjusting Sheave
1. Remove the belts.
2. To adjust pitch diameter loosen setscrew(s) on ad-
justableange(s)ofsheave.
3. Follow Steps 9–12 in Installing Sheave on page
82 in this section.