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Series C400, C500, and LFC500 each include a flood sensor on the 

relief valve to detect excessive discharge and trigger notification of 

potential flood events.  

NOTICE

An add-on connection kit is required to activate the flood sensor. 

Without the connection kit, the sensor is a passive component 

that does not communicate with any other device. (A retrofit 

sensor connection kit is also available for existing installations. See 

“Add-on and Retrofit Sensor Connection Kits,” for ordering details.)

RP/IS-A-C400/C500

C400-OSY-FS

Installation, Maintenance, and Repair Manual

 

Colt™ Series C400, C500, LFC500

Reduced Pressure Zone Assemblies 

Reduced Pressure Detector Assemblies

2

1

2

" – 10"

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.

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 instal-

lation. If the information provided here is not consistent 

with local building or plumbing codes, the local codes 

should be followed. This product must be installed by  

a licensed contractor in accordance with local codes 

and ordinances.

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 war-

rant. All products must be retested once maintenance has 

been performed. 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 and external 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

!

 

NOTICE

For Australia and New Zealand, line strainers should be installed 

between the upstream shutoff valve and the inlet of the backflow 

preventer.

NOTICE

Use of the flood sensor does not replace the need to comply 

with all required instructions, codes, and regulations related  

to installation, operation, and maintenance of this product,  

including the need to provide proper drainage in the event of  

a discharge. 

 

Watts

®

 is not responsible for the failure of alerts due to  

connectivity or power issues.

Testing

For field testing procedure, download IS-A-ATG-1 at watts.com.
For technical assistance, contact your local Ames representative.

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.

WARNING

!

Summary of Contents for AMES Colt C400

Page 1: ...y in compliance with local codes but at least once per year or more as service conditions war rant All products must be retested once maintenance has been performed Corrosive water conditions and or u...

Page 2: ...on the assembly and the local water authority approves the installation The assembly should be installed with adequate clearance around the valve to allow for inspection testing and servicing Ensure a...

Page 3: ...re C 5 Remove the check 2 module with the same instructions as in step 4 For servicing 6 checks see the maintenance instructions for valve sizes 8 to 10 6 To clean or inspect either check module inser...

Page 4: ...service hole and thread in the service bolt by hand until it contacts the linkage See Figure A 4 Continue to thread in service bolt with the wrench until the service hole in the linkage is aligned wi...

Page 5: ...d to remove it then unscrew the relief valve from the housing 5 Remove the cover plate of the relief valve by detaching the four connecting screws 6 Remove the rubber diaphragm from the relief valve N...

Page 6: ...Open valves B and C bleeding to atmosphere Then closing valve B restores the system to a normal static condition Observe the pressure differential gauge If there is a decrease in the indicated value c...

Page 7: ...ng First Check Module Relief Valve Second Check Module Troubleshooting PROBLEM CAUSE SOLUTION Relief valve discharges water while system is not flowing Check 1 is fouled Remove and clean check 1 Relie...

Page 8: ...nt In the event of such defects within the warranty period the Company will at its option replace or recondition the product without charge THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE...

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