Ames Fire & Waterworks 3000SS Stainless Steel Double Check Detector Assemblies - Manual (Page 2)

1. Before installing any Ames backflow assembly, flush the line
thoroughly to remove all debris, chips and other foreign objects.
Failure to do so may make the assembly inoperable.
2. The Ames 2000SS and 3000SS may be placed in any position
as long as the flow indicator arrow in the assembly is pointed
in the direction of water flow, and the local water authority has
approved the installation configuration. ASSE (American Society
of Sanitary Engineers) has approved these assemblies for either
horizontal or vertical installation.
3. Allow sufficient clearance around the installed assembly to con-
duct testing, servicing, and inspection. Allow a minimum of 12”
from the flood level to the bottom of the assembly.
4. If double check or double check detector assembly is installed in a
vault or pit, be sure proper drainage is available. If sufficient drain-
age is not available a cross-connection may occur.
5. If installing on fire protection system, be sure to purge air from
fire system. Fill system slowly with all inspectors test valves
open.
2
Installation Instructions
Vertical Installation
WARNING !
Depressurize valve before servicing.
Removing Cam-Checks
1. Shut down water system and lock out system if possible. Slowly
open all ball valves to relieve air and water pressure. Loosen
bolts on groove coupler and remove groove coupler and cover
plate from valve body.
2. Remove #1 Cam-Check assembly by using your hands to un-
screw (turn counterclockwise) Cam-Check and remove through
top access port. Do not use Cam Arm as a handle to unscrew
Cam-Check. If Cam-Check cannot be loosened by hand, insert a
long screwdriver between valve body and Cam-Check (see Figure
3). Slowly apply pressure against the Cam-Check until loosened.
Finish unscrewing by hand. Unscrew #2 Cam-Check (turn
counterclockwise) by placing a long screwdriver between lugs and
applying pressure to loosen #2 Cam-Check. Finish unscrewing by
hand.
3. To clean Cam-Check, (except 2 1 /
2
" – 4" (65-100mm) DC check)
locate the Cam Arm opening stud on the outlet flange of the valve
assembly.
Slide the Cam Arm over the stud with the check threads facing
downward (Figure 1). Tighten 1 /
4
" nut on stud to secure cam
bar. Slowly pull the assembly outward to open check raising the
clapper so that the end of the Cam Arm rests between roller and
clapper (Figure 2).
Thoroughly clean the seat area and clapper sealing surfaces of
both Cam-Checks. Rinse Cam-Checks and O-rings thoroughly.
Inspect seats, clapper sealing surfaces, Cam Arms, and O-rings
for damage. If damaged, install a new Cam-Check assembly and/
or O-ring.
WARNING !
While the spring mechanism is removed for check servicing, never
pull the screwdriver out or off the support notches on the arbors.
Doing so may cause bodily injuries. Keep fingers out of seat and
clapper area.
4. Gently close the Cam-Check using the Cam Arm opening stud.
Before reinstallation of Cam-Checks thoroughly clean O-ring groove
and lubricate O-ring with FDA approved lubricant. Insert and thread
#2 Cam-Check first and then #1 Cam-Check. #2 Cam-Check should
be tightened by inserting a long screwdriver between lugs to tighten
firmly (see Figure 1). Do not over tighten. Tighten #1 Cam-Check
firmly by hand only. Replace cover plate, clean groove coupler gas-
ket and groove, replace groove coupler. Close ball valves.
Maintenance Instructions
Outdoor Installation
Indoor Installation
6" & 8" (150-200mm)
1st Check DC
6" & 8" (150-200mm)
2nd Check DC
Valve Outlet Flange
Threaded Stud on Flange
Cam Arm Open Pin
Figure 1