background image

STEP 1

Pre-set pilots as noted:

Pressure Sustaining

 – Turn Sustaining Control adjustment screw OUT, counterclockwise, backing pressure off the spring, to allow it to 

stay open while adjusting the other controls.

Opening and Closing Speed

 – Turn the adjustment screws on the Closing Speed and Opening Speed Controls, if the main valve is so 

equipped, OUT, counterclockwise, 11/2 to 21/2 turns from full closed position.

STEP 2

Energize the solenoid to check actuation and to confirm connection to power source.

STEP 3

De-energize the solenoid so that initial valve filling is against the closed solenoid.

STEP 4 

To ensure proper operation, any trapped air will need to be bled off 

the valve cover during startup. If your ACV includes a bleed valve, 

the valve (See Figure 1). 

If your valve does not include a bleed valve, bleed air by loosening 

a fitting on the valve or a plug, at the highest point of the valve as-

sembly.

STEP 5

Pressure the line, by opening the upstream isolation valve slowly 

Air is vented through the air bleed valve or loosened fitting. Tighten 

the fitting when liquid begins to vent (See Figure 1).

Repeat the process until no air is trapped in the system.

STEP 6

Actuate the solenoid to open the main valve, checking that the 

main valve opens.

Globe

Angle

Size (in)

1

 

1/4

1

 

1/2

2

21/2

3

4

6

8

10

12

14

16

20

24

A (in)

16

16

20

22

22

24

32

34

38

44

48

52

56

56

B (in)

10

10

12

14

14

16

24

26

28

30

34

40

48

48

Size (in)

1

 

1/4

1

 

1/2

2

2

 

1/2

3

4

6

8

10

12

14

16

C (in)

16

16

20

22

22

24

32

34

38

44

48

52

D (in)

10

10

12

14

14

16

24

26

28

30

34

40

Counterclockwise to OPEN 

bleed valve

Setting the Pressure Controls

The following tables detail the recommended minimum valve servicing dimensions.

          

B

          

          

FLOW

FLOW

FLOW

          

FLOW

Valve Servicing Dimensions

Figure 1 

Position Indicator

IOM-A-ACV-920-15_620-15   2115 

EDP# 1917048 

© 2021 Watts         3

Summary of Contents for Ames 920GD-15

Page 1: ...Setting the Pressure Controls 3 Maintenance Schedule 6 Trouble Shooting Guide 6 Valve Disassembly Instructions 8 ACV Schematic 11 Local building or plumbing codes may require modifica tions to the inf...

Page 2: ...the upstream zone The valve will close if necessary until upstream pressure is above the pilot setting The valve should be specified to include the optional opening speed control and position indicato...

Page 3: ...ed air by loosening a fitting on the valve or a plug at the highest point of the valve as sembly STEP 5 Pressure the line by opening the upstream isolation valve slowly Air is vented through the air b...

Page 4: ...valve until the inlet pressure drops to the desired setting Fine tune the Reducing Control adjustment to the pressure reduc ing setpoint as detailed in Step 7 STEP 10 Adjust the Sustaining Control sc...

Page 5: ...counterclockwise increasing the rate of closing IF INSTALLED Opening Speed Flow Control Adjustment The Opening speed flow control allows free flow into the cover and re stricted flow out of the cover...

Page 6: ...specification sheets for approximate cover capacity A continuous flow of water from the open port indicates a damaged diaphragm or loose disc diaphragm assembly Disassemble valve and replace diaphragm...

Page 7: ...djust opening speed control to verify functionality adjust as required Standard setting for open ing speed control is 1 1 2 2 1 2 turns open from full closed position Can be adjusted in field Main Val...

Page 8: ...move cover nuts and washers 3 Remove the cover If cover is not free to be removed loosen it by tapping upward along its outside edge with a dull cold chisel pic tured above a Large valves may require...

Page 9: ...rush or by using a Mineral Dissolving Solution Inspect parts for wear and replace if necessary 7 Inspect valve seat If seat is not damaged removal is not necessary Valve seats 6 and smaller are thread...

Page 10: ...ts in a crossing pattern to ensure even distribution Test the Disc and Diaphragm Assembly for smooth travel by following the Freedom of Movement Test procedure in previous section 11 Test the integrit...

Page 11: ...el 9 Stem Washer ASTM A276 304 Stainless Steel 10 Diaphragm Washer ASTM A536 65 45 12 Epoxy Coated Ductile Iron 11 Diaphragm Buna N Nitrile 12 Disc Retainer ASTM A536 65 45 12 Epoxy Coated Ductile Iro...

Page 12: ...resulting from labor charges delays vandalism negligence fouling caused by foreign material damage from adverse water conditions chemical or any other circumstances over which the Company has no cont...

Reviews: