WATTS U009 Series Reduced Pressure Zone Assemblies Instruction Manual

WATTS U009 Series Reduced Pressure Zone Assemblies Instruction Manual

WARNING

Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information can result in death, serious personal injury, property damage, or damage to the equipment. Keep this Manual for future reference.

WARNING
Local building or plumbing codes may require modifications to the information provided. You are required to consult the local building and plumbing codes prior to installation. If this information is not consistent with local building or plumbing codes, the local codes should be followed.

WARNING

Need for Periodic Inspection/Maintenance : This product must be tested periodically in compliance with local codes, but at least once per year or more as service conditions warrant

If installed on a fire suppression system, all mechanical checks, such as alarms and backflow preventers, should be flow tested and inspected in accordance with NFPA 13 and/or NFPA 25

Corrosive water conditions and/or unauthorized adjustments or repair could render the product ineffective for the service intended. Regular checking and cleaning of the product’s internalin ponentes helps assure maximum life and proper product function.

NOTICE
For Australia and New Zealand, line strainers should be installed between the upstream shutoff valve and the inlet of the backflow preventer

Fittings such as end connectors intended to join alternative pipe systems made from other materials (such as plastics) shall also conform to the relevant dimensional and performance requirements of the appropriate Australian, New Zealand, or joint Australian–New Zealand Standard for the alternative pipe system.

Testing
For field testing procedure, refer to IS-TK-DL, IS-TK-9A, IS-TK-99E, and IS- TK-99D at watts.com.
For Australia, refer to Australian standard AS/NZS 2845.3.
For other repair kits and service parts, refer to the Backflow Prevention Products Repair Kits & Service Parts price list PL-RP-BPD at watts.com.
For technical assistance, contact your local Watts representative.

Installation Guidelines

Indoors
For indoor installations, the assembly needs to be easily  accessible to facilitate testing and servicing. If it is located in alone close to a wall, be sure the test cocks are easily accessible. A drain line and air gap should be piped from the relief valve  connection as shown in Figure 1. This is where evidence of discharge is clearly visible, signaling the need to protect against water damage. Therefore, never install the assembly in concealed locations. (For more information, download the ESAG/EL/TC specification at watts.com.)

Outside
In an area where freezing conditions do not occur, the assembly  can be installed outside. The most satisfactory installation is above ground; thus, the assembly should be installed in this manner.
Backflow preventers should not be installed in pits unless approved by local codes. In such cases, a modified pit installation is preferred.

NOTICE
In an area where freezing conditions can occur, the assembly should be installed above ground in an insulated enclosure, as shown in Figure 2. (For more information, download the ES-WB specification at watts.com.)

The assembly must be installed in an accessible location to facilitate testing and servicing. A discharge line should be piped from the air gap at the relief valve connection to ensure there is adequate drainage. Never pipe the discharge line directly into a drainage ditch, sewer, or sump. Never install the assembly where any part of the unit could become submerged in standing water.

Parallel
Two or more smaller-sized assemblies can be piped in parallel  (when approved) to serve a large supply pipe main, as shown IN Figure 3. This type of installation is employed where increased capacity is needed beyond that provided by a single valve and permits testing or servicing of an individual valve without shutting down the complete line.
The number of assemblies used in parallel should be determined by the engineer’s judgment based on the operating conditions of a specific installation.
For parallel valve installations, the total capacity of the assemblies should equal or exceed that required by the system.

Annual Inspection
Annual inspection of all water system safety and control valves is required and necessary. Regular inspection, testing, and cleaning assures maximum life and proper product function.

NOTICE
Shutoff Valves: When shutoff valves are removed and reassembly is necessary, the shutoff valve with the test cock is to be mounted on the inlet side of the backflow preventer.
A. The assembly should always be installed in an accessible location to facilitate testing and servicing. Check the state and local codes to ensure that the backflow preventer is installed in compliance, such as the proper height above the ground.
B. Watts recommends that a strainer be installed ahead of the assembly to protect the internal components from unnecessary fouling.

CAUTION
Do not add a strainer when the backflow preventer is installed on seldom-used water lines, such as fire sprinkler lines or other lines called upon only during emergencies.

Start Up : The downstream shutoff should be closed. Open the upstream shutoff slowly and fill the valve. When the valve is filled, open the downstream shutoff slowly and fill the water supply system. This is necessary to avoid water hammer or shock damage.
C. Water discharge from the relief valve should be vented in accordance with code requirements. The relief valve should never be solidly piped into a drainage ditch, sewer, or sump. The discharge should be terminated approximately 12″ above the ground or through an air gap piped to a floor drain.

NOTICE
Relief Valve Discharge Rates
The installation of an air gap with the drain line terminating above a floor drain handles any normal discharge or nuisance spitting through the relief valve. However, floor drain size may need to be designed to prevent water damage caused by a catastrophic failure condition. See Figure 4 for maximum relief valve discharge rates, size, and capacity of typical floor drains.
Do not reduce the size of the drain line from the air gap fitting. Pipe full line size.
D. After initial installation, a discharge from the relief valve opening may occur due to inadequate initial flushing of pipe lines to eliminate dirt and pipe compounds. If flushing does not clear, remove the first check valve and clean thoroughly

NOTICE
Periodic relief valve discharge may occur on dead end service applications, such as boiler feed lines or cooling tower makeup lines due to fluctuating supply pressure during a static or no flow condition. To avoid this discharge, install a spring-loaded rubber seated check valve ahead of the backflow assembly to “lock-in” the downstream pressure.
E. Backflow preventers should never be placed in pits unless absolutely necessary and then only when and as approved by local codes. In such cases, provision should be made to always vent above flood level or for a pit drain to ensure an adequate air gap below the relief port.

F. The backflow preventers must be inspected periodically for any discharge from the relief valve which provides a visual indication of need for cleaning or repair of check valves. Also testing for proper operation of the device should be made periodically in compliance with local codes, but at least once a year or more often, depending upon system conditions.
The relief vent discharges water when, during no-flow periods, the first check valve is fouled or the inlet pressure to the device drops sufficiently due to upstream pressure fluctuations to affect the required operating differential between the inlet pressure and reduced pressure zone. Otherwise, such relief (spitting) can occur when the second check is fouled during emergency backflow or resulting from a water hammer condition. (For more information, download Troubleshooting Guide S-TSG at watts. com.)

NOTICE
Special considerations are necessary when testing assemblies installed on Fire Prevention Systems.
Fire Protection System Installations: The National Fire Protection Agency (NFPA) Guidelines require a confirming flow test be conducted whenever a “main line” valve such as a backflow assembly or the shutoff valves have been operated. Certified testers of backflow assemblies must conduct this confirming test.

TYPICAL FLOW RATES AS SIZED BY FLOOR DRAINNUFACTURERS ****

Servicing the Relief Valve

NOTICE
No special tools are required to service assembly sizes 2½” to 3

1. Detach the activation module, if installed, from the flood sensor then remove the sensor from the relief valve.
2. Remove the four or six relief valve cover bolts while holding the cover down.
3. Lift the cover straight off. The stem and diaphragm assembly normally remain with the cover as it is removed. The relief valve spring is free inside the body at this point.
4. The relief valve seat is located at the bottom of the body bore, and can be removed, if necessary, for cleaning. The disc can be cleaned without disassembly of the relief valve module. If it is determined that the relief valve diaphragm and/or disc should be replaced, the relief valve module can be readily disassembled without the use of special tools.
   

NOTICE
The disc rubber is molded into the disc holder and is supplied as a disc holder assembly.

5. To reassemble the relief valve, press the seat firmly into place in the body, center the spring on the seat, and insert the cover and relief valve module as a unit straight into the bore. Press down  on the cover to assure proper alignment. Insert and tighten bolts.
6. Reattach the flood sensor to the relief valve and mount the activation module to the sensor

NOTICE
If the cover does not press flat against the body, the stem assembly is crooked and damage can result. Realign the stem and cover before bolts are inserted.

Servicing First and Second Check Valves

1. Remove the relief valve assembly by following the preceding procedure.

2. Remove the retainer from the body bore. The check valve modules can now be removed from the valve by hand or with a screwdriver.
   NOTICE
   The seats and springs of the first and second check modules are not interchangeable. The heavier spring and smaller diameter seat belong with the first check module.

3. The check seats are attached to the cage with a bayonet type locking arrangement. Holding the cage in one hand, push the seat inward and rotate counterclockwise for 21⁄2″ to 3″; clockwise for 1/4″ to 2″ against the cage. The seat, spring cage, spring, and disc assembly are now individual components.

4. The disc assembly may now be cleaned and reassembled or, depending on its condition, discarded and replaced with a new assembly from the repair kit. O-rings should be cleaned or replaced as necessary and lightly greased with the FDAapproved silicon grease.

5. Reassemble the check valve modules. Check modules are installed in the valve body with the seat facing the valve inlet. The modules must be securely in place before the retainer can be replaced. Reinstall relief valve assembly as well as flood sensor and activation module.

NOTICE
No special tools are required to service assembly sizes 2½” to 3″.

CHECK ASSEMBLY 3⁄4″ M3

CHECK ASSEMBLY 1⁄4″ – 3⁄4″

CHECK ASSEMBLY 1″ – 2″


CHECK ASSEMBLY 2½” – 3″

Troubleshooting

and repair or replace guide
Low flows passing through mainline valve| Mainline check fouled| Disassemble and clean
Meter strainer plugged
Damaged mainline seat disc or seat| Disassemble and replace
Broken mainline spring

Add-on and Retrofit Sensor Connection Kits for Building Management Systems

deflector (4), ground wire, and power adapter. Use this kit to activate the flood sensor and enable flood detection capabilities on the relief valve of a new installation working with a BMS controller (not included).
88003057| FP-RFK-BF-BMS-CFSBMS Sensor Retrofit Connection Kit Series 009, LF009, LFU009, SS009, U009Sizes ½” to ¾”| Includes flood sensor, deflector, sensor activation module with cable, ground wire, and power adapter. Use this kit to install the flood sensor and enable flood detection capabilities on the relief valve of an existing installation working with a BMS controller (not included).
88003058| FP-RFK-BF-BMS-CFSBMS Sensor Retrofit Connection Kit Series 009, LF009, LFU009, SS009, U009Sizes 1″ to 1½”| Includes flood sensor, deflector (2), sensor activation module with cable, mounting bolts, ground wire, and power adapter. Use this kit to install the flood sensor and enable flood detection capabilities on the relief valve of an existing installation working with a BMS controller (not included).
88003059| ****FP-RFK-BF-BMS-CFSBMS Sensor Retrofit Connection Kit Series 009, LF009, LFU009, U009Sizes 2″ to 3″| Includes flood sensor, deflector, sensor activation module with cable, mounting bolts, ground wire, and power adapter. Use this kit to install the flood sensor and enable flood detection capabilities on the relief valve of an existing installation working with a BMS controller (not included).

Add-on and Retrofit Sensor Connection Kits for Cellular Communication

deflector (4), Cellular Gateway with mounting kit, ground wire, and power adapter. Use this kit to activate the flood sensor and enable flood detection capabilities on the relief valve of a new installation working with cellular communication to send alerts by email message, SMS text message, or voice call.
88003061| FP-RFK-BF-CFSCellular Sensor Retrofit Connection Kit Series 009, LF009, LFU009, SS009, U009Sizes ½” to ¾”| Includes flood sensor, deflector, sensor activation module with cable, Cellular Gateway with mounting kit, ground wire, and power adapter. Use this kit to install the flood sensor and enable flood detection capabilities on the relief valve of an existing installation working with cellular communication to send alerts by email message, SMS text message, or voice call.
88003062| FP-RFK-BF-CFSCellular Sensor Retrofit Connection Kit Series 009, LF009, LFU009, SS009, U009Sizes 1″ to 1½”| Includes flood sensor, deflector (2), sensor activation module with cable, mounting bolts, Cellular Gateway with mounting kit, ground wire, and power adapter. Use this kit to install the flood sensor and enable flood detection capabilities on the relief valve of an existing installation working with cellular communication to send alerts by email message, SMS text message, or voice call.
88003063| FP-RFK-BF-CFSCellular Sensor Retrofit Connection Kit Series 009, LF009, LFU009, U009Sizes 2″ to 3″| Includes flood sensor, deflector, sensor activation module with cable, mounting bolts, Cellular Gateway with mounting kit, ground wire, and power adapter. Use this kit to install the flood sensor and enable flood detection capabilities on the relief valve of an existing installation working with cellular communication to send alerts by email message, SMS text message, or voice call.

the event of such its with the mostly parade Corto the product without charge
THE WARRANTY SET FORTH HEREGION EXPRESSLY AND IS THE ONLY MARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES TER WARRANTIES, EXPRESS ON SPLIED THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTES, EXPRESS MARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICILAR PURPOSE LUDING BUT NOT LIMITED TO THE IMPLIED
I may not apply to you Tour SO FAR AS CONSISTENT WITH APPLICABLE STATE LAN, ANY BEPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED INCLUDING THE IMPLIED WARRANTES OF MERCHANTABILITY AND FITNESS FOR A PARICIAR PURPOSEDERATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIP

References

• Watts | Plumbing, Heating and Water Quality Solutions

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