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Installation, Maintenance, and Repair Manual
Maxim
Series M400, M500, LFM500
™
Reduced Pressure Zone Assemblies
Reduced Pressure Detector Assemblies
2
⁄
" – 10"
1
2
WA R NI N G
!
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.
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
internal components helps assure maximum life and proper
product function.
WARNING
!
This device 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 sprinkler system, 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.
WARNING
!
Do not impede or prevent sleeve movement by installing riser
cradle clamps or other obstructive elements on or around the
sleeve. Sleeve movement is required to service the backflow.
NOTICE
Due to shipping, storage, and general handling, the Victaulic
Coupling for the shutoff valves may have loosened and should be
retightened during installation.
Testing
For field testing procedure, download IS-A-ATG-1 at watts.com.
For technical assistance, contact your local Ames representative.
RP/IS-A-M400/M500
M400 OSY
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Summary of Contents for Watts AMES Maxim Series
- Page 1 Due to shipping, storage, and general handling, the Victaulic Coupling for the shutoff valves may have loosened and should be retightened during installation. Testing For field testing procedure, download IS-A-ATG-1 at watts.com. For technical assistance, contact your local Ames representative.
- Page 2 Installation Guidelines • Most field problems occur because dirt and debris present in the system at the time of installation becomes trapped in check No. 1. Flush the system before the valve is installed. If the system is not flushed until after the valve is installed, remove both check modules from the valve and open the inlet shutoff to allow water to flow for a sufficient time to flush debris from the water line.
- Page 3 Maintaining the Check Modules " – 4" WARNING Depressurize valve before servicing. Housing Figure A Figure C Figure B Check No. 1 Figure D Figure E Figure F Check No. 2 Figure D Figure E Figure F WARNING 5. Repeat step 4 to remove check module No. 2. Before servicing any Ames valve, shut down the water system by closing both the inlet and outlet shutoff valves.
- Page 4 Maintaining the Check Modules 6" – 10" Material/Tool Requirements Figure A • #4 Phillips screwdriver or " diameter rod, length sufficient to span diameter of check (See Figures A and B.) • " – 13 x 5 fully threaded hex bolt (service bolt) Service Hole •...
- Page 5 Servicing the Relief Valve WARNING Before servicing the relief valve, shut down the water system by closing both the inlet and outlet shutoff valves and relieving pressure within the assembly by opening the test cocks No. 2, No. 3, and No. 4. DO NOT REMOVE SPIDER BUSHING FOR SERVICING Figure A Figure B...
- Page 6 Relief Valve Assembly Diaphragm Spring Spider Bushing Piston Assembly Body Hose & Cover Plate Cover Screw Inlet coupler, O-ring, ‘E’ Clip For repair kits and parts, refer to the Backflow Prevention Products, Repair Kits, and Parts PL-AMES price list at watts.com.
-
Page 7: Troubleshooting
Troubleshooting PROBLEM CAUSE SOLUTION Relief valve discharges water while system is not flowing Check No. 1 is fouled Remove and clean check No. 1 Relief valve does not properly close Service relief valve Municipal water pressure is fluctuating Install check valve upstream of backflow assembly Relief valve does not shut off properly Fouled relief valve seat Service relief valve... - Page 8 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 RP/IS-A-M400/M500 2326 7018384 © 2023 Watts...