Febco 825YA - User Manual

INSTALLATION, OPERATION, MAINTENANCE
IOM-F-825_826
Operation and Maintenance Manual
Reduced Pressure Backflow Prevention Assemblies
Models 825Y, 825YA, 825, 825D, 825YD & 826YD
Read and understand this manual prior to installing,
operating or servicing this equipment.
TABLE OF CONTENTS
Features and Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Freeze Protection Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Vandalism Protection Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
General Service Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Troubleshooting Procedures and Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7, 8
Field Testing Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9, 10
Service Procedures Model 825Y (
3
/ 4 –2") . . . . . . . . . . . . . . . . . . . . . . . 11, 12, 13
Parts Lists and Part Numbers Model 825Y (
3
/ 4 –2") . . . . . . . . . . . . . . . . . . 14, 15
Exploded View of Model 825Y (
3
/ 4 –2") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Service Procedures Models 825, 825D and 825YD (2
1
/ 2 –3") . . . . . . . . . . 16, 17
Service Procedures Models 825, 825D and 825YD (4–10") . . . . . . . . . . . 18, 19
Parts Lists and Part Numbers Model 825 (2
1
/ 2 –10”) . . . . . . . . . . . . . . . . . 20, 21
Exploded View of Model 825 (2
1
/ 2 –10") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Parts Lists and Part Numbers Models 825D and 825YD . . . . . . . . . . . . . . . . 22
Exploded View Models 825D and 825YD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Parts List and Exploded View of Model 825D and 825YD Check Assembly 24
Parts List and Exploded View of Model 825 and 825D Relief Valve . . . . . . . 25
Parts List and Exploded View of Model 825YD Relief Valve . . . . . . . . . . . . . 26
Parts List and Exploded View of Model 826YD Relief Valve and Bypass . . . 27
Service Procedure Relief Valve Models 825, 825D and 825YD (2
1
/ 2 –10") 28, 29
Spring Removal Tool Instructions Model 825 (2
1
/ 2 –10") . . . . . . . . . . . . . . . . . 30
Commercially Available Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . 31, 32, 33
How To Order Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Series 825Y
Series 825YA
Series 826YD

Summary

Feature and Operating Procedures

Reduced Pressure Backflow Preventer

Describes the function and components of the backflow preventer assembly.

Installation Guidelines

Typical Installations

Illustrates common installation configurations for the backflow preventer.

Indoor Installation

Details recommended installation practices for indoor environments.

Freeze Protection Procedure

Model 825 Y (3;4-2) Freeze Protection

Outlines procedures to protect the Model 825Y from freezing.

Model 825;825 D;825 YD (21;2-10) Freeze Protection

Details freeze protection measures for larger models of backflow preventers.

Vandalism Protection Procedure

Securing Assemblies and Test Cocks

Methods to secure shutoff valves and test cocks against tampering.

Protective Cage Installation

Guidelines for installing protective cages to deter vandalism.

General Service Procedures

General Service Instructions

Provides general guidance applicable to servicing all models.

Suggested Tool Kits

Lists recommended tools for servicing the backflow prevention assemblies.

Troubleshooting Procedure

With Differential Pressure Gauge

Diagnosing issues using a differential pressure gauge.

Without Differential Pressure Gauge

Diagnosing issues when a differential pressure gauge is not available.

Troubleshooting Guide

A comprehensive guide to identify and resolve common problems with backflow preventers.

Field Testing Procedures

Purpose of Test

Explains the objective of testing the relief valve and check valves.

Equipment Required for Test

Lists the necessary equipment for performing field tests.

Test Differential Relief Valve

Procedure for testing the differential relief valve's operation.

Test Check Valve 1

Method for testing the operational integrity of the first check valve.

Test Check Valve 2

Procedure for testing the second check valve's ability to hold back pressure.

Restore Operation

Steps to return the assembly to its operational state after testing.

Test for the 826 YD

Specific testing procedures for the Model 826YD.

Proper Bypass Operations

Details on how to correctly operate the bypass during testing.

Testing with the FEBCO Test Kit

Guidance on using the FEBCO Test Kit for various assemblies.

Service Procedure 825 Y and YA (3;4-2)

Check Valve Inspection;Repair Model 825 Y (3;4-2)

Steps for inspecting and repairing the check valve for Model 825Y.

Check Valve Seat Replacement Model 825 Y (3;4-2)

Procedure for replacing the seat disc in the check valve.

Check Valve Reassembly Model 825 Y (3;4-2)

Instructions for correctly reassembling the check valve.

Relief Valve Inspection;Repair Model 825 Y (3;4-2)

Steps to inspect and repair the relief valve assembly.

Relief Valve Seat Removal Model 825 Y (3;4-2)

Procedure for removing the seat ring from the relief valve.

Relief Valve Reassembly Model 825 Y (3;4-2)

Instructions for reassembling the relief valve.

Service Procedures 825, 825 D, 825 YD and 826 YD (21;2-3)

Check Valve Disassembly Models 825, 825 D and 825 YD (Sizes 21;2-3)

Steps for disassembling the check valve for 21/2-3 inch models.

Check Assembly Repair Models 825 825 D and 825 YD (Sizes 21;2-3)

Guide for repairing the check valve assembly for these sizes.

Valve Seat Removal (Sizes 21;2-3) Threaded-in Seat Ring Type Models Model 825

Procedure for removing the seat ring from threaded-in seat ring models.

Valve Seat Removal (Sizes 21;2-3) Bolted in Seat Ring Type Models Model 825 D & 825 YD

Procedure for removing the seat ring from bolted-in seat ring models.

Valve Seat Reassembly (Sizes 21;2-3) Threaded-in Seat Ring Type Models Model 825

Instructions for reassembling threaded-in seat ring models.

Valve Seat Reassembly (Sizes 21;2-3) Bolted-in Seat Ring Type Models Model 825 D & 825 YD

Instructions for reassembling bolted-in seat ring models.

Check Valve Reassembly (Sizes 21;2-3)

Steps for reassembling the check valve for 21/2-3 inch models.

Service Procedures 825, 825 D and 825 YD (4-10)

Check Valve Disassembly (Sizes 4-10)

Steps for disassembling the check valve for 4-10 inch models.

Seat Disc Removal (Sizes 4-10)

Procedure for removing the seat disc from larger check valves.

Spring Removal (Sizes 4-10)

Instructions for safely removing the spring from larger check valves.

Valve Seat Removal (Sizes 4-10) Threaded-in Seat Ring Model 825

Procedure for removing the seat ring from threaded models.

Valve Seat Removal (Sizes 4-10) Bolted in Seat Ring Model 825 D and 825 YD

Procedure for removing the seat ring from bolted models.

Valve Seat Reassembly (Sizes 4-10) Threaded-in Seat Ring Model 825

Instructions for reassembling threaded seat ring models.

Valve Seat Reassembly (Sizes 4-10) Bolted-in Seat Ring Model 825 D and 825 YD

Instructions for reassembling bolted seat ring models.

Check Valve Reassembly Models 825, 825 D and 825 YD

Steps for reassembling the check valve for these models.

Model 825 (21;2-10) Parts

Check Valve Body: Model 825

Exploded view and part numbers for the Model 825 check valve body.

Shutoffs: Model 825

Lists part numbers for shutoff valves used with Model 825.

Model 825 (21;2-10) Parts (Continued)

Assemblies; Kits: Model 825

Lists available assembly and kit part numbers for Model 825.

Model 825 Type D and YD (21;2-10) Parts

Check Valve Body: Model 825 D & 825 YD

Exploded view and part numbers for Model 825D & 825YD check valves.

Shutoffs: Model 825 D & 825 YD

Lists part numbers for shutoff valves used with Model 825D & 825YD.

Model 825 Type D and YD (21;2-10) Parts

Assemblies; Kits: Model 825 D

Lists available assembly and kit part numbers for Model 825D.

Assemblies; Kits: Model 825 YD

Lists available assembly and kit part numbers for Model 825YD.

Model 825 and 825 D (21;2-10) Parts

Relief Valve Body: Model 825 & 825 D

Exploded view and part numbers for the relief valve body of Models 825 and 825D.

Model 825 Type YD (21;2-10) Parts

Relief Valve Body: Model 825 YD

Exploded view and part numbers for the relief valve body of Model 825YD.

Model 826 Type YD (21;2-10) Parts

Relief Valve with Bypass: Model 826 YD

Parts list for the Model 826YD relief valve with bypass assembly.

Service Procedures Relief Valve 825, 825 D and 825 YD (21;2-10)

Relief Valve Disassembly Non-Modular Type Models 825 and 825 D

Steps for disassembling non-modular relief valves for Models 825 and 825D.

Relief Valve Reassembly Non-Modular Type Models 825 and 825 D

Instructions for reassembling non-modular relief valves for Models 825 and 825D.

Relief Valve Seat Disc Replacement Modular Type Model 825 YD

Procedure to replace the seat disc in modular relief valves for Model 825YD.

Service Procedures Relief Valve 825, 825 D and 825 YD (21;2-10) (Cont.)

Relief Valve Seat Ring Replacement Modular Type Model 825 YD

Procedure for replacing the seat ring in modular relief valves for Model 825YD.

Relief Valve Inner Diaphragm Replacement Modular Type Model 825 YD

Steps to replace the inner diaphragm in modular relief valves for Model 825YD.

Spring Removal Tool

Seat Ring Tool

Information and dimensions for a seat ring tool for Model 825.

Commercial Parts for Relief Valve - Model 825 & 825 D (11;2-10)

Commercial Parts for Main Valve - Model 825 (11;2-10)

Lists commercially available parts for the main valve.

Commercial Parts for Main Valve - Model 825 Y (3;4-2)

Commercial Parts for Relief Valve - Model 825 YD (21;2-10)

Lists commercially available parts for relief valves of Model 825YD.

Commercial Parts for Main Valve - Model 825 D & 825 YD (21;2-10)

How to Order Repair Parts

Febco 825YA Specifications

General

Brand	Febco
Model	825YA
Category	Water System
Language	English