6
Replace the four (4) stainless steel washers
and nuts onto the four (4) stainless steel
bolts accordingly. Hand tighten each of the (4)
nuts onto the block. The tightening sequence of
nuts onto the mounting block should be done
in a diagonal manner to ensure equal distribu-
tion of pressure throughout the mounting
block. Nuts should be tightened to 15 in. -lb.
using a torque wrench. DO NOT OVER TIGHTEN
NUTS ONTO BLOCK. MAINTENANCE OF FLEX-
HEAD IS COMPLETE. (Same tightening process
as in Installation section).
Stainless Steel and Galvanized Ductwork Model Installation and Maintenance Manual – 40
