FEBCO 826YD User Manual

INSTALLATION INSTRUCTIONS

FRT

RWWP
1754

FRT

RWWP
1754

Reduced Pressure Detector Assemblies

Installation Instructions

1. Consult local codes for specific installation requirements and restrictions
applicable to your area. It is recommended that system supply pressure
be at least 20psi (133kPa).

2. These instructions apply to series 825YD, and 826YD size 21⁄2" to 10"
(65-250mm) only. The valves may be installed only in the horizontal ori­entation as shown.

3. The valve assembly must be installed where it is accessible for periodic
testing and maintenance. Clearances shown in the installation views
apply to exterior, interior and pit/vault installations and are only recom­mendations. These minimums do not apply to removable protective
enclosures. Refer to local codes for actual requirements in your area.

4. PRIOR TO INSTALLING THE VALVE INTO THE LINE, FLUSH THE
SUPPLY LINE OF ALL FOREIGN MATERIAL. Failure to flush the supply
line may cause the check valves to become fouled and require disas­sembly and cleaning.

5. DO NOT LIFT THE ASSEMBLY BY CONNECTING TO THE GATE
VALVE HANDWHEELS OR STEMS.

6. After installation SLOWLY fill the assembly with water and bleed air
from the body using the #2, # 3 and # 4 test cocks. Test the valve
assembly to ensure correct operation.

NOTE: All assemblies are tested at the factory for proper operation and

leakage. If the valve does not pass the field test, it is most likely due to
a fouled check valve. This is not covered by the factory warranty. The
valve cover(s) must be removed and the check seats inspected and
cleaned. Any damage or improper operation caused by pipeline debris or
improper installation/start-up is not included in the factory warranty.

In case of a possible warranty claim, contact your local supplier or

FEBCO Representative. DO NOT REMOVE THE VALVE ASSEMBLY
FROM THE PIPELINE.

7. The assembly must be protected from freezing and excessive pressure
increases. Pressure increases can be caused by thermal expansion or
water hammer. These excessive pressure situations must be elimi­nated to protect the valve and system from possible damage.

IS-F-825YD-826YD

Series 825YD, 826YD

Reduced Pressure Zone Assemblies

Sizes: 21⁄2" – 10" (65 – 250mm)

826YD

Typical Installation

Figure 1

12" (300mm) Minimum

Refer to Local Codes

FLOW

HORIZONTAL INSTALLATION OF THE RP SERIES 825YD

(Side View)

(Shown With Strainer)

Figure 2

6" (150mm) Minimum
Refer to Local Codes

18" (450mm) Min

HORIZONTAL INSTALLATION OF THE RP SERIES 825YD

(Top View)

(Shown With Strainer)

12" (300mm)

Minimum

MAINTENANCE MANUAL

Service and Maintenance

Service Procedure

Close the outlet shutoff valve, then close the inlet shutoff valve. Bleed
residual pressure from the assembly by opening the #4, #3, and # 2 test
cocks in this sequence.

General

1. Detailed maintenance manuals are available from your local FEBCO
representative.

2. Rinse all parts with clean water prior to reassembly.

3. DO NOT USE ANY PIPE DOPE, OIL, GREASE OR SOLVENT ON ANY
PARTS unless instructed to do so.

4. Do not force parts. Parts should fit together freely. Excess force may
cause damage and render the assembly inoperable.

5. Carefully inspect seals and seating surfaces for debris or damage.

6. After servicing, repressurize the assembly and test to ensure proper
operation.

Check Valve Disassembly

1.

CAUTION: The cover retains the spring on 21⁄2" - 3" (65 - 80mm) valve sizes.
Remove the cover capscrews uniformly while holding the cover in place.
Carefully reduce hand force on the cover to relieve spring compression.

The check module on the 4" - 10" (100 - 250mm) valve sizes retains the

spring. Unscrew the capscrews uniformly to avoid binding the cover in
the body bore. The spring will push the cover approximately 1⁄2" off the
top of the body.

2. Lift the spring and check assembly 21⁄2" - 3" (65 - 80mm) or check mod­ule 4" - 10" (100 - 250mm) from the body.

3. Inspect and clean debris from the disc and seat ring. Replace any dam­aged parts.

4. Use the reverse procedure to assemble. If necessary, apply a thin film
of FDA/NSF approved grease to cover the O-ring. Install the capscrews
and tighten in a uniform cross pattern.

Relief Valve Disassembly

1. Remove the capscrews holding the cover to the relief valve body, and
remove the cover.

2. Remove the diaphragm and pull the internal assembly from the body. It
may be helpful to push the internal assembly with your fingers through
the discharge opening.

3. Inspect for debris, damage or fouling of the seat disc. Clean or replace
the rubber disc as required.

4. Reposition the internal assembly and diaphragm into the body. Install
the cover and cap screws.

Field Test Procedure

FEBCO recommends the use of the appropriate test method presented in
the ASSE Series 5000 manual that is consistent with your local codes.

Troubleshooting

PROBLEM CAUSE SOLUTION

1. Continuous relief a. Debris on check Disassemble and clean

valve discharge seating surfaces
b. Debris on relief valve Disassemble and clean
seating surfaces

2. Intermittent relief a. Inlet pressure fluctuations Eliminate fluctuations

valve discharge
b. Downstream pressure Eliminate surges
surges

3. Low flows passing a. Mainline check fouled Disassemble and clean

through mainline b. Bypass line plugged Disassemble and clean
valve (RPDA)

Note: The gap drain is not designed to catch the maximum discharge pos­sible from the relief valve. The installation of FEBCO air gap with the drain
line terminating above a floor drain will handle 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. Do not reduce the size of the drain line from the air gap fitting.

Limited Warranty: FEBCO 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 OF

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.

A Division of Watts Water Technologies, Inc.

USA: 4381 N. Brawley • Ste. 102 • Fresno, CA • 93722 • Tel. [phone] • Fax: [phone] • www.FEBCOonline.com

Canada: 5435 North Service Rd. • Burlington, ONT. • L7L 5H7 • Tel. [phone] • Fax: [phone] • www.FEBCOonline.ca

IS-F-825YD-826YD 0845 EDP# 980005 © FEBCO, 2008