Watts 685GD-20 Installation, Operation And Maintenance Manual Download Page 12 | Manualshive

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IOM-A-ACV-985-20_685-20 2115

EDP# 1917104

© 2021 Watts

USA: Backflow

T: (978) 689-6066 • F: (978) 975-8350 • AmesFireWater.com

USA: Control Valves

T: (713) 943-0688 • F: (713) 944-9445 • AmesFireWater.com

Canada:

T: (888) 208-8927 • F: (905) 481-2316 • AmesFireWater.ca

Latin America:

T: (52) 55-4122-0138 • AmesFireWater.com

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Summary of Contents for 685GD-20

Page 1: ...Control 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 information provided You...

Page 2: ...ration The Deep Well Pump Control Valve with Pressure Relief Feature is designed to minimize the surges associated with the starting and stopping of well pumps and open relieving excessive pressure du...

Page 3: ...e times to confirm rate of movement and remove excess air trapped within the cover chambers See Figure 1 Below To increase the rate of opening closing turn the adjustment screws on the speed controls...

Page 4: ...ntrol See Figure 3A STEP 8 When pump demand is satisfied pump will continue to operate as the main valve opens To open main valve de energize the solenoid checking that the main valve opens STEP 9 Ope...

Page 5: ...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 6: ...pilot system Check isolation valves ensure open Diaphragm is damaged Conduct diaphragm seal test repair and replace if necessary Main valve stem assembly corroded damaged Inspect stem assembly clean...

Page 7: ...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 8: ...posits and inspect for excessive wear Remove any mineral build up from other components with wire brush or by using a Mineral Dissolving Solution Inspect parts for wear and replace if necessary 7 Insp...

Page 9: ...for smooth travel by following the Freedom of Movement Test procedure in previous section 11 Test the integrity of the Seat Seal by following the Seat Seal Test procedure in previous section 12 Retur...

Page 10: ...3 and Smaller ASTM A276 302 Stainless Steel 13A Bearing Retaining Ring 4 and Larger ASTM A276 302 Stainless Steel 14 Inner Bearing ASTM A276 304 Stainless Steel 15 O ring Buna N Nitrile 16 O ring Buna...

Page 11: ...IOM A ACV 985 20_685 20 2115 EDP 1917104 2021 Watts 11 NOTES...

Page 12: ...021 Watts USA Backflow T 978 689 6066 F 978 975 8350 AmesFireWater com USA Control Valves T 713 943 0688 F 713 944 9445 AmesFireWater com Canada T 888 208 8927 F 905 481 2316 AmesFireWater ca Latin Am...

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