Watts Lfc500-fs series Operating instructions

Series C400-FS, C500-FS, and LFC500-FS are each equipped

with an integrated flood sensor that detects excessive relief valve

discharges and triggers notification of potential flood events.

NOTICE

An add-on connection kit is required to activate the integrated

flood sensor. Without the connection kit, the flood sensor is a

passive component and will not communicate with any other de-

vice. (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-FS

C400-OSY-FS

Installation, Maintenance, and Repair Manual

Colt™ Series C400-FS, C500-FS, LFC500-FS

Reduced Pressure Zone Assemblies

Reduced Pressure Detector Assemblies

21⁄2" – 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.

Testing

For field testing procedure, refer to Ames installation sheets

IS-A-ATG-1 at www.amesfirewater.com.

For technical assistance, contact your local Ames representative.

NOTICE

The information contained herein is not intended to replace the

full product installation and safety information available or the

experience of a trained product installer. You are required to

thoroughly read all installation instructions and product safety

information before beginning the installation of this product.

Inquire with governing authorities for local installation

requirements.

NOTICE

Use of the integrated flood sensor does not replicate the need to

comply with all required instructions, codes, and regulations re-

lated 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.

• Most field problems occur because dirt and debris are present

in the system at the time of installation and becomes trapped

in check #1. The system should be flushed before the back-

flow 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

a sufficient time to flush debris from the water line. If debris in

the water system continues to cause fouling, a strainer can be

installed upstream of the backflow assembly.

•

Series C400-FS, C500-FS, and LFC500-FS can be installed

in either horizontal, “N” pattern, or “Z” pattern 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 installation.

•The assembly should be installed with adequate clearance

around the valve to allow for inspection, testing, and servicing. A

minimum clearance of 12" should be between the lower portion

of the assembly and the floor or grade. The valve should be

protected from freezing.

• Installing a backflow preventer in a pit or vault is not

recommended.

• Normal discharge and nuisance spitting are accommodated by

the use of an Ames air gap fitting and a fabricated indirect waste

line. Floor drains of the same size must be provided in case of

excessive discharge.

• Series C400, C500, and LFC500 backflow preventers should be

tested by a certified tester at the time of installation.

NOTICE

Assembly body should not be painted.

Installation Guidelines

Relief Valve Discharge Rates 21⁄2" – 10"

lpm gpm

1330 350

1140 300

950 250

760 200

570 150

380 100

190 50

0 0

0 20 40 60 80 psi

0 138 276 413 551 kPa

Rate of Flow

Pressure

Horizontal Installation

N Pattern Z Pattern

WARNING

Before servicing any Ames valve, it is mandatory to shut down

the water system by closing both the inlet and outlet shutoff

valves. After the shutoff valves are closed, open test cocks

No. 2, No. 3, and No. 4 to relieve pressure within the backflow

assembly.

1. After test cock No. 3 has been opened to relieve pressure,

remove the test cock from the housing. (See Figure A.)

Insert a #3 screwdriver through the hole on the top of the

cover sleeve and using both hands rotate the cover sleeve

approximately a quarter turn clockwise and a quarter turn

counterclockwise to break the sleeve O-ring seals. Using the

screwdriver, slowly slide the cover sleeve to the downstream

side of the housing. (See Figure B.)

3. Remove the stainless steel check retainer from the housing.

(See Figure B.)

4. Remove the check #1 module by inserting two flat blade

screwdrivers into the slots on either side of the check module

and gently pry the check module toward the open zone.

(See Figure C.)

Remove the check #2 module with the same instructions

as in step 4. (For servicing 6" checks, see the maintenance

instructions for sizes 8" to 10".)

6. To clean or inspect either check module, insert a #3 screw-

driver through the downstream side of the check module.

(See Figures D and E.) When the screwdriver is in place,

remove the E-clip and pin connecting the structural members.

(See Figure F.) The check clapper opens with no tension.

7. Thoroughly clean the seating area. The sealing disc can be

removed, if necessary, by detaching the screws connecting

the keeper plate to the clapper. Reverse and reinstall the

sealing disc if the elastomer is cut or damaged.

Wash the check module and O-ring and inspect for any

damage. If damaged, reinstall new parts.

After a thorough cleaning, lubricate the O-ring with an FDA

Approved lubricant, replace the pin and E-clip in the structural

members, remove the screwdriver, and reinstall the check

modules. Assemble the housing in reverse order of these

instructions.

Maintaining the Check Modules

21⁄2" – 6"

Figure A Figure B Figure C

Figure D Figure E Figure F

#2 Check

Figure D Figure E Figure F

#1 Check

Housing

Tool Requirements

• #4 Phillips screwdriver or 3/8" diameter rod, length sufficient to

span the diameter of the checks (See Figures A and B.)

• 1/2" – 13 x 5 fully threaded hex bolt (service bolt)

• 3/4" open end or socket wrench

NOTICE

Due to shipping, storage, and general handling, the Victaulic Coupling

for the shutoff valves may have loosened and should be retightened

during installation.

Instructions

WARNING

Before servicing any Ames valve, it is mandatory to shut

down the water system by closing both the inlet and outlet

shutoff valves. After the shutoff valves are closed, open test

cocks No. 2, No. 3, and No. 4 to relieve pressure within the

backflow assembly.

1. After test cock No. 3 has been opened to relieve pressure,

remove the test cock from the housing. (When repairing an

8" or 10" device, remove both Victaulic couplers from the

body. Slide the downstream Victaulic coupler gasket to the

downstream side of the housing. The upstream Victaulic

coupler gasket stays in place.)

2. Remove checks that are to be serviced.

3. Locate the 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 with the service notches

on the spring arbors. (See Figure A.)

5. Insert the Phillips screwdriver through the arbors and service

hole of the linkage making sure that the tip of the screwdriver

extends past the ends of the arbors by a minimum of 1/4".

(See Figure B.)

6. Loosen the service bolt until the load is transferred to the

screwdriver. Continue to loosen the service bolt until there is

sufficient clearance to remove the complete spring mechanism.

7. To disconnect the linkage, remove the retaining clip and pin.

Store both items in a safe location for reinstallation.

8. To remove the spring mechanism, grasp the screwdriver at

the center and pull the complete assembly straight out and

store in a safe place.

9. Reinstall the components in reverse order of these instructions.

WARNING

While the spring mechanism is removed for check

servicing, never pull the screwdriver out or off the sup-

port notches on the arbors. Doing so may cause bodily

injuries.

Maintaining the Check Modules

8" – 10"

Figure B

Figure A

Service Hole

Servicing the Relief Valve

WARNING

Before to servicing the relief valve, it is mandatory to shut

down water system by closing both the inlet and outlet

shutoff valves and relieving pressure within the assembly by

opening test cocks No. 2, No. 3, and No. 4.

DO NOT REMOVE SPIDER BUSHING FOR SERVICING

1. Detach the activation module, if installed, from the flood sensor.

Use a #2 Phillips screwdriver to remove the sensor from the

relief valve.

3. Disconnect the hose from the bottom cover plate to the

relief valve.

An O-ring seals the relief valve body to the main housing.

Avoid tightening the connection beyond firm hand tightening.

The relief valve should be removable by unscrewing the relief

valve from the housing.

Remove the cover plate of the relief valve by detaching the

four connecting screws.

Remove the rubber diaphragm from the relief valve. Notice

how the diaphragm is configured so that it can be reinstalled

in the same manner. The hard rubber tab in the diaphragm fits

into a similar socket in the head of the piston. (See Figure A.)

Hold the relief valve in both hands with the threaded end

up and both thumbs on the head of the piston. Push up on

the piston until the piston shaft with the attached E-clip is

exposed. Remove the E-clip. (See Figure B.)

Remove the piston and spring from the relief valve housing and

thoroughly clean all parts including the diaphragm. Inspect all

rubber parts for damage; if any are damaged, replace with

new parts.

Reassemble the relief valve in the reverse order of these

instructions.

Figure B

Figure A

Follow the requirements of each test when performed to ensure

successful installation, operation, and maintenance of the

backflow preventer.

Test No.1

Purpose: To test check valve No. 2 for tightness against

reverse flow.

Requirements: Valve must be tight against reverse flow under

all pressure differentials. Slowly open the ‘high’ valve A and the

‘vent’ valve C, and keep the ‘low’ valve B closed. Open test No.

4. Indicated pressure differential is expected to decrease slightly.

If pressure differential continues to decrease (until the vent

opens) check valve No. 2 is reported as ‘leaking.’

Test No. 2

Purpose: To test shutoff No. 2 for tightness.

Requirements: After passing test No. 1, continue to test No. 2

by closing test cock No. 2. The indicated pressure differential is

expected to decrease slightly. If pressure differential continues

to decrease (approaching ‘zero’), shutoff No. 2 is reported to be

‘leaking.’

Test No. 3

Purpose: To test check valve No. 1 for tightness.

Requirements: Valve must be tight against reverse flow under

all pressure differentials. Close ‘high’ valve A and open test cock

No. 2. Close test cock No. 4. Disconnect vent hose at test cock

No. 4. 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, check valve No. 1 is reported as ‘leaking.’

Test No. 4

Purpose: To test operation of pressure differential relief valve.

Requirements: The pressure differential relief valve must

operate to maintain the ‘zone’ between the two check valves at

least 2 psi less than the supply pressure. Close ‘vent’ valve C.

Open ‘high’ valve A. Open the ‘low’ valve B very slowly until the

differential gauge needle starts to drop. Hold the valve at this

position and observe the gauge reading when the first discharge

is noted from the relief valve. Record this as the opening

differential pressure of the relief valve.

NOTICE

The differential gauge needle MUST drop slowly. Close test

cocks No. 2 and No. 3. Use the ‘vent’ hose to relieve pressure

from the test kit by opening valves A, B, and C. Remove all

test equipment and open shutoff No. 2.

Testing Reduced Pressure Zone Assemblies

Ball Type Test Valves

Needle

Valve

High Hose

(Yellow)

Low Hose

(White or Red)

Vent Hose

(Blue)

Test Cock Test Cock Test Cock Test Cock

No. 1 No. 2 No. 3 No. 4

Replacement Parts

For repair kits and parts, refer to Backflow Prevention

Products Repair Kits & Service Parts price list

PL-A-RP-BPD found on www.amesfirewater.com.

O-ring, Inlet Coupler

Spider Bushing

Spring

Piston Assembly

Cover Screw

Relief Valve Assembly

Retainer E-Clip

Body

Diaphragm

Cover Plate

Assembly

Closure Sleeve Test Cock with O-ring

Closure Sleeve

Sleeve O-Ring

E-clip / Closure Pin

Check Disc

Sleeve O-ring and Gasket

Check Module O-ring

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

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

Incorrectly Installed diaphragm Remove diaphragm and correctly install

Damaged rubber surface on piston Replace with new piston

Damaged or plugged pressure hose Repair or replace hose

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

ORDERING CODE ADD-ON/RETROFIT KIT DESCRIPTION

88009418 FP-BF-BMS-21/2-10

BMS Sensor Connection Kit

Series C400-FS, C500-FS, LFC500-FS

Sizes 2½" to 10"

Includes sensor activation module with cable, ground wire, and power adapter. Use

this kit to activate the integrated flood sensor and enable flood detection capabilities

on the relief valve of a new installation linked to a BMS controller (not included).

88009419 FP-RFK-BF-BMS-CFS-21/2-10

BMS Sensor Retrofit Connection Kit

Series C400, C500, LFC500

Sizes 2½" to 10"

Includes flood sensor, 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 linked to a BMS controller

(not included).

Add-on and Retrofit Sensor Connection Kits for Cellular Communication

ORDERING CODE ADD-ON/RETROFIT KIT DESCRIPTION

88009420 FP-BF-CFS-21/2-10

Cellular Sensor Connection Kit

Series C400-FS, C500-FS, LFC500-FS

Sizes 2½" to 10"

Includes sensor activation module with cable, Cellular Gateway with mounting kit,

ground wire, and power adapter. Use this kit to activate the integrated flood sensor

and enable flood detection capabilities on the relief valve of a new installation linked

to a cellular network to send alerts by email message, SMS text message, or

voice call.

88009421 FP-RFK-BF-CFS-21/2-10

Cellular Sensor Retrofit Connection Kit

Series C400, C500, LFC500

Sizes 2½" to 10"

Includes flood sensor, 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

linked to a cellular network to send alerts by email message, SMS text message,

or voice call.

Limited Warranty: Ames Fire & Waterworks (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date

of original shipment. 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 ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO

OTHER WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO

THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special

or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from

labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no control.

This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.

Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the

above limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to

determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES