Stainless Steel and Galvanized Ductwork Model Installation and Maintenance Manual – 38
PART II – INSTALLATION OF TOP MOUNTING BLOCK
1
Connect FlexHead to Sprinkler System
Connect one (1) inch stainless steel flexible
hose of FLEXHEAD to one (1) inch black iron
pipe union of fire protection system in
accordance to NFPA standards, state and local
codes (Fig. 6s).
2
Connect to Top Mounting Block
A.
Place top FLEXHEAD mounting block
onto previously installed bottom mounting
block with gasket making sure that sprinkler
head section of the FLEXHEAD unit is inserted
into two (2) inch hole in duct, and that the
four (4) stainless steel bolts of bottom
mounting block align with corresponding bolt
holes in top mounting block. Angle of flexible
hose should not exceed 90˚.
B.
Place one (1) stainless steel washer and one
(1) stainless steel nut onto each of the four (4)
stainless steel bolts (Fig. 7s). Tighten each of
the nuts hand tight onto the block. Tightening
process of nuts onto the mounting block
should be done in a diagonal process to ensure
equal distribution 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. Installation
of FLEXHEAD is complete.
Fig. 6s
Fig. 7s
