York Millennium YK M3 M3 G4 THRU YK S6 S4 J2, YK LB LB G4 THRU YK SE SC J4 Operating & Maintenance Manual page 59

eductor should be checked for any foreign particles
that may be obstructing the jet.
ELECTRICAL CONTROLS
1. All electrical controls should be inspected for obvi-
ous malfunctions.
YORK INTERNATIONAL
2. It is important that the factory settings of controls
(operation and safety) not be changed. If the set-
tings are changed without YORK's approval, the
warranty will be jeopardized.
3. A 5-11 year life battery is part of the RTC-Real
Time Clock. To replace, refer to page 29.
FORM 160.49-O2
59