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NL 635 BP (14)-SP130925
SUBMITTAL SUBMITTAL NORTHLAKE 635 BUSINESSPARK BUSINESSPARK 1221 S. Beltline Rd Coppell,TX75019 Coppell,TX75019 PCI Construction P.O. Box 2967 McKinney, TX 75070 Phone: (972)562-2762 Fax: (972)562-2954 TABLE OF CONTENTS Water03.11.00 Detector Check and Vault WATER WATER VAULT DETECTOR CHECK RP/IS-757/757DCDA Double Check Valve Assemblies Double Check Detector Assemblies 1 Sizes: 2" 10" (65 250mm) 2 TM Installation Service Repair Kits Maintenance For field testing procedure, send for IS-TK-DL, IS-TK-9A, IS-TK-99E and IS-TK-99D. For other repair kits and service parts, send for PL-RP-BPD. For technical assistance, contact your local Watts representativ 757 OSY Limited Warranty:Watts Regulator Co.(the Company) warrants each product to be f from defects in material and workmanship under normal usage for the date of original shipment.In the event of such defects withi Company will,at its option,replace or recondition the product wi THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT.THE COMPANY MAK WARRANTIES,EXPRESS OR IMPLIED.THE COMPANY HEREBY SPECIFICALLY DI ALL OTHER WARRANTIES,EXPRESS OR IMPLIED,INCLUDING BUT NOT LIMITE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICUL POSE. The remedy described in the first paragraph of this warranty sha sive remedy for breach of warranty,and the Company shall not be tal,special or consequential damages,including without limitatio repairing or replacing other property which is damaged if this p other costs resulting from labor charges,delays,vandalism,neglig eign material,damage from adverse water conditions,chemical,or a Inquire with governing authorities for local IMPORTANT: which the Company has no control.This warranty shall be invalida installation requirements. misapplication,improper installation or improper maintenance or Some States do not allow limitations on how long an implied warr do not allow the exclusion or limitation of incidental or conseq Note:For Australia and New Zealand: Pipeline strainers should above limitations may not apply to you.This Limited Warranty gives you specific le be installed between the upstream shutoff valve and the inlet of and you may have other rights that vary from State to State.You the backflow preventer. state laws to determine your rights.SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW,ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED,INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICUL It's important that this assembly be tested periodically in com- POSE,ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGIN pliance with local codes, but at least once per year or more as service conditions warrant. If installed on a fire sprinkler sys all mechanical checks, such as alarm checks and backflow preventers, should be flow tested and inspected internally in accordance with NFPA 13 and NFPA 25. Maintenance Instructions 8" 10" (200 250mm) Material/Tool Requirements:3.Locate the service hole and thread in the service bolt by hand until it contacts the linkage. (Figure A) 5 #3 Phillips screwdriver or /" diameter rod, length sufficient to 16 4.Continue to thread in service bolt with the wrench until the span diameter of check, see Figures A and B. service hole in the linkage is aligned with the service notches 1 /" 13" x 5"fully threaded hex bolt (Service bolt). 2 on the spring arbors. (Figure A) 3 /" open end or socket wrench. 4 Figure A 5.Insert the Phillips screwdriver through the arbors and service hole of the linkage making sure that the tip of the screwdriver Service Hole 1 extends past the ends of the arbors by a minimum of /" Instructions: 4 (6mm). (Figure B) Prior to servicing any Watts valve, it is 6.Back out the service bolt until load is transferred to the scr mandatory to shut down the water driver. Continue to back out the service bolt until sufficient c system by closing both the inlet and ance is achieved to remove the complete spring mechanism. outlet shutoff valves. After shutoff valves are closed, open test cock 7.To disconnect linkage, remove retaining clip and pin (store in #2, #3 & #4 to relieve pressure within a safe location for reinstallation). the backflow assembly. 8.To remove spring mechanism, grasp the screwdriver at the Figure B 1.After #3 test cock has been opened to center and pull complete assembly straight out and store in relieve pressure, remove #3 test cock from housing. a safe place. When repairing an 8" or 10" (200 250mm) device, remove 9.Reinstall in reverse. both Victaulic couplers from body. Slide the downstream WARNING While the spring mechanism is removed for check Victaulic coupler gasket to the downstream side of the hous- servicing; never pull the screwdriver out or off the support not ing. The upstream Victaulic coupler gasket stays in place. es on the arbors. Doing so may cause bodily injuries. 2.Remove check/s to be maintenanced. Test Procedures Double Check Valve Assemblies Test Check Valve No.1Test for Leaky No. 2 shutoff Step 1:Ensure shutoff #1 is open, shutoff #2 is closed.Step 1:Connect the high side to test cock #1, low side to test cock #4. Open test cock #1 and test cock #4. Close Step 2:Connect high side hose to test cock #3, low side to test shutoffs #1 and #2. cock #2 and open both test cock #2 and test cock #3. 1 Step 2:Close valve C. Open valve A, then open valve B 2 Step 3:Open valve C, then open A to bleed air from the high turn, loosen hose at test cock #4 to remove air. side. close valve a, then open B to bleed low side. Retighten hose. Close valve B. Step 3:If the differential gauge rises above 0, there is exces- Step 4:Connect vent hose loosely to test cock#1. Open valve sive leakage at shutoff #2 and it must be replaced to A to vent air from vent hose, Tighten vent hose at test test the assembly. cock #1, open test cock #1. Ball Type Test Valves Step 5:Close shutoff #1. Slowly loosen hose at test cock #2 until differential gauge rises to 2psi and retighten hose. C A If the differential reading does not decrease, record check valves as tight. B Test Check Valve No. 2 Needle Valve Step 1:Move the high side hose to test cock #4, low side to Vent Hose test cock #3 and open both test cock #3 and test (Blue) cock #4. Remove vent hose from test cock #1, open High Hose shutoff #1. (Yellow) Step 2:Open valve C, then open valve A to bleed air from the high side. Close valve A, then open valve B to bleed low side. Close valve B. Step 3:Connect vent hose loosely to test cock #1. Open valve Low Hose A to vent air from the vent hose. Tighten vent hose at White or Red test cock #1, open test cock #1. Step 4:Close shutoff #1, then slowly loosen hose at test cock #3 until differential gauge rises to 2psi and retighten hose. If the differential reading does not decrease, record check as tight. Remove all hoses and restore valve to original working condition. Note:The assembly will fail both the first and second check valve tests above, if shutoff #2 leaks excessively. To test for Test CockTest CockTest CockTest Cock leaky #2 shutoff, use the following procedure. No. 1No. 2No.3No.4 3 Basic Installation Instructions Guidelines Most field problems occur because dirt and debris present in the system at the time of installation becomes trapped in the #1 check. The system should be flushed before the backflow valve is installed. If the system is not flushed until after the backflow valve is installed, remove both check modules from the valve and open the inlet shutoff to allow water to flow for Horizontal Installation sufficient time to flush debris from the water line. If debris i water system continues to cause fouling, a strainer can be installed upstream of the backflow assembly. Watts models 757 and 757DCDA may be installed in either horizontal or vertical position as long as the backflow assembly is installed in accordance with the direction of the flow arrow on the assembly and the local water authority approves the Vertical installation. The assembly should be installed with adequate Installation clearance around the valve to allow for inspection, testing and servicing. 12" should be the minimum clearance between the N Pattern lower portion of the assembly and the floor or grade. Note:Assembly body should not be painted. Maintenance Instructions 1 2/" 6" (65 150mm) 2 Figure C Figure A Figure B Figure DFigure EFigure F Prior to servicing any Watts valve, it is mandatory to shut down 5. Remove #2 check module with the same instructions as in the water system by closing both the inlet and outlet shutoff#4 above. For servicing 6" (150mm) checks see 8" 10" valves. After shutoff valves are closed, open test cock #2, #3(200 250mm) instructions on p. 3. and #4 to relieve pressure within the backflow assembly. 6. To clean or inspect either check module, insert a #3 screw- 1. After #3 test cock has been opened to relieve pressure,driver through the downstream side of the check module as remove #3 test cock from housing. (Figure A)shown in Figure D and E. When the screwdriver is in place, remove the E-clip (Figure F) and pin connecting the structur- 2. Insert a #3 screwdriver through the hole on the top of the al members and the check clapper will open with no tension. cover sleeve and using both hands rotate the cover sleeve 11 approximately /-turn clockwise and /-turn counter-clock-7. Thoroughly clean the seating area. The sealing disk may be 44 wise to break the sleeve O-ring seals. Using the screwdriver,removed, if necessary, by removing the screws connecting slowly slide the cover sleeve to the downstream side of thethe keeper plate to the clapper. The sealing disc may be housing. (Figure B)reversed and reinstalled if the elastomer is cut or damaged. 3. Remove the stainless steel check retainer from the housing.8. Wash check module and O-ring and inspect for any dam- (Figure B)age. If damaged, reinstall new parts. 4. Remove the #1 check module (Figure C) by inserting two9. After thorough cleaning, lubricate O-ring w/FDA approved flat blade screwdrivers into the slots on either side of thelubricant, replace pin and E-clip in structural members, check module and gently pry the check module toward theremove screw driver and reinstall check modules and open zone.assemble housing in reverse order of these instructions. 2 Series 757, 757N, 757DCDA, 757NDCDA Repair Kits Sleeve O-ring and GasketClosure Sleeve Test Cock with O-ring Check Module O-ring Closure Sleeve E-clip Disc Elastomer First Check Module Second Check Module 70181316150RK 757/757DCDA CK108992036150RK 757/757DCDA 089920010250RK 757/757DCDA CK1089920510250RK 757/757DCDA Kit consists of:First check module,Check module O-ring and Kit consists of:Check module O-ring,Disc elastomer and E-clip Disc elastomer 08992126150RK 757/757DCDA 70181336150RK 757/757DCDA CK2089921410250RK 757/757DCDA Kit consists of:Closure sleeve,Sleeve O-ring and Gasket 089920110250RK 757/757DCDA CK2 Kit consists of:Second check module,Check module O-ring and Disc elastomer Backflow Prevention Products USA:815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com Canada:5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanad RP/IS-757/757DCDA 0845EDP# 1915343 © Watts, 2008