Elkhart Brass Scorpion 8394-04 - Manual (Page 11)

8
V. I
NSTALLATION
A. Component Mounting
See system layout drawing number 8294040 (part number 98284040) for pictorial of system
layout.
1. Monitor
Attach 4" 150 lb. class ANSI pattern companion flange to water supply pipe so that bolt
pattern will allow monitor to be installed with the "straight ahead" position properly aligned.
Alignment is correct when the "straight ahead" direction is centered between adjacent flange
holes.
Attach monitor inlet flange to companion flange on water supply pipe with eight (8) 5/8-11
UNC grade 5 carbon steel or stainless steel bolts, 2-1/2 inches long, with nuts. If a wafer
type butterfly valve is installed between the monitor and the companion flange, required bolt
length will be 4-1/2 inches. Seal flange joint with gasket, or suitable flange sealant. Most
wafer type butterfly valves have seats that serve as flange gaskets, and separate gaskets or
sealant is not required. Apply Loctite® #242 to bolt threads, then thread on nuts, and torque
to 60-70 ft-lbs.
Warning:
When installing monitor on a raised face companion flange, it is critical
that bolts be tightened uniformly to prevent cocking of the monitor relative to the flange or
valve. If the monitor becomes cocked, (see Figure 9) the monitor cast flange base will fracture
and fail when the bolts on the "high" side are tightened.
Figure 9
Improper Flange Installation
2. Relay Box (Center-Stow 81480001 and Left-Stow 81480011)