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Maintenance Instructions 2

Figure A
#1 Check Diagrams
Figure D
#2 Check Diagrams
Figure D
Instructions
Prior to servicing any Ames valve, it is mandatory to
shut down the water system by closing both the inlet
and outlet shutoff valves. After shutoff valves are closed,
open test cock #2, #3 and #4 to relieve pressure within
the backflow assembly.
1.
After #3 test cock has been opened to relieve pressure,
remove #3 test cock from housing. (Figure A)
2.
Insert a #3 screwdriver through the hole on the top of the
cover sleeve and using both hands rotate the cover sleeve
1
approximately
/
-turn clockwise and
4
wise to break the sleeve O-ring seals. Using the screwdriver,
slowly slide the cover sleeve to the downstream side of the
housing. (Figure B)
3.
Remove the stainless steel check retainer from the housing.
(Figure B)
4.
Remove the #1 check module (Figure C) by inserting two
flat blade screwdrivers into the slots on either side of the
check module and gently pry the check module toward
the open zone.
1
/
" – 6" (65 – 150mm)
2
Figure B
Figure E
Figure E
5.
6.
7.
1
/
-turn counter-clock-
4
8.
9.
3
Remove #2 check module with the same instructions as
in #4 above. For servicing 6" (150mm) checks see 8" – 10"
(200 – 250mm) instructions on p.4.
To clean or inspect either check module, insert a #3 screw-
driver through the downstream side of the check module
as shown in Figures D and E. When the screwdriver is in
place, remove the E-clip (Figure F) and pin connecting the
structural members and the check clapper will open with
no tension.
Thoroughly clean the seating area. The sealing disc may be
removed, if necessary, by removing the screws connecting
the keeper plate to the clapper. The sealing disc may be
reversed and reinstalled if the elastomer is cut or damaged.
Wash check module and O-ring and inspect for any
damage. If damaged, reinstall new parts.
After thorough cleaning, lubricate O-ring w/FDA approved
lubricant, replace pin and E-clip in structural members,
remove screw driver, reinstall check modules and
assemble housing in reverse order of these instructions.
Figure C
Figure F
Figure F