User Guide

ManualsBrandsFebco ManualsBackflow Preventers8" 880V MasterSeries Configurable Design RPZ Assembly w/ NRS Valves (Lead Free)

INSTALLATION, OPERATION, MAINTENANCE

IOM-F-860_880V

Read and understand this manual prior to installing,

operating or servicing this equipment.

INDEX

Vandalism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Features and Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . 3

Troubleshooting Procedures and Guide . . . . . . . . . . . . . . . . . . . . . . 4

General Service Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Service Procedures for Models 860 and 880V (2

/2" - 10"). . . . . . . . 6

Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Freeze Protection Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Cut-a-Way View of Model 860 (2

/2" - 10") (figure #6) . . . . . . . . . . 10

Cut-a-Way View of Relief Valve (2

/2" - 10") (figure #7). . . . . . . . . . 10

Exploded View of 10" Disc (figure #9) . . . . . . . . . . . . . . . . . . . . . . 10

Cut-a-Way View of Model 880V (standard configuration) (figure #8) . . 11

Cut-a-Way View of 10" Disc (figure #10). . . . . . . . . . . . . . . . . . . . . 11

Parts List for Models 860 and 880V (2

/2" - 10") . . . . . . . . . . . . . . . 12

How To Order Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Kit Numbers for Models 860 and 880V (2

/2" - 10") . . . . . . . . . . . . 14

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back Cover

Maintenance Manual

Reduced Pressure Assembly

Models 860 & 880V 2

/2" – 10"

860

880V

Standard Configuration

880V

Vertical Configuration

IOM-F-860_880V.indd 1 7/11/08 10:45:25 AM

Summary of content (16 pages)

PAGE 1
IOM-F-860_880V I N S TA L L AT I O N , O P E R AT I O N , M A I N T E N A N C E Maintenance Manual Reduced Pressure Assembly Models 860 & 880V 21/2" – 10" 860 880V Standard Configuration 880V Vertical Configuration INDEX Vandalism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Features and Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . 3 Troubleshooting Procedures and Guide . . . . . . . . . . . . . . . . . . . . . .
PAGE 2
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Vandalism If the unit is installed where vandalism may be a problem, the assembly should be protected and secured. A chain can be looped through both shutoff valve handwheels and locked in position to prevent tampering. Test cock valve handles can also be removed.
PAGE 3
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Features and Operating Procedures Reduced Pressure Backflow Preventer The FEBCO Reduced Pressure Backflow Preventer Assembly consists of two independently operating, spring loaded check valves with a pressure differential relief valve located between the two checks. The pressure drop across the first check valve is approximately 7.0psid with no flow.
PAGE 4
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Troubleshooting Guide With Differential Pressure Gauge Symptom #1 Reading: Problem: Check Differential Across 2 to 3 psid Leak in #1 or #2 check valve #1 Check Valve 6 to 8 psid and steady Malfunctioning pressure relief valve 2 to 7 psid and ﬂuctuating Inlet pressure ﬂuctuating Reading: Problem: Check Differential Across 2 to 3 psid #1 check valve held open #1 Check Valve 6 to 8 psid and steady Malfunctioning pressure relief valve Symptom
PAGE 5
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Troubleshooting Guide Continued Symptom #4 Cause: Relief valve does not open above A. Outlet gate valve not closed completely 2.0 psid during ﬁeld testing B. Plugged low pressure hydraulic passage Solution: Inspect and clean (from "ZONE" to inner diaphragm) C. Improper alignment of internal parts Reassemble during reassembly (causing high resistance to movement) D.
PAGE 6
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" General Service Procedures 1. FEBCO backflow prevention assemblies can be serviced with commonly available tools and are designed for ease of maintenance. The assemblies are designed to be serviced in line, so the unit should not need to be removed from the line during servicing. NO special tools required. 2. The most common cause of check fouling and relief valve discharge is dirt and debris in the seating areas.
PAGE 7
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Seat Ring Assembly Removal (See pages 10-11) Note: Remove the seat ring assembly only if the seat ring (item 3) or arm (item 4) appear to be worn or damaged. 1. Remove locknuts (item 3.4) and washers (item 3.3). (See Figure #4 below.) 2. Remove seat ring assembly. NOTE: When reassembling, tighten locknuts to 12 - 15 ft./lbs. If leaking occurs around bolt, further tighten until leaking stops. Do not over tighten. 3.
PAGE 8
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Relief Valve Disassembly (See pages 10-11) 1. Remove o-ring (item 34.1) and RV seat ring (item 34) from the bottom of RV body. 2. Remove RV cover (item 20) from RV body by removing eight capscrews (item 22). 3. Remove diaphragm from RV body. Remove RV assembly module from RV body (item 21). 4. Loosen tabs on guide (item 33) and remove guide and seat disc (item 32), remove instruction label (item 28.2) from center of button, covering flow screw (item 28.1).
PAGE 9
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Testing All mechanical devices should be inspected on a regular basis to ensure they are working correctly. The assembly should be tested at time of initial installation, after servicing or maintenance, and at least annually thereafter.
PAGE 10
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Model 860 Cut-A-Way Figure #6 10" Model 860 includes clamp (item 70) not shown. Relief Valve Cut-A-Way (21/2" - 10") Figure #7 Relief Valve Exploded (21/2" - 10") Figure #8 34.1 31.1 31 37 38.1 25 38 29 39 19 29 28 * Model 880, 880V only. 27 28.1 20 23 34.
PAGE 11
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Model 880V Cut-A-Way Figure #9 880V Only 10" Disc Assembly Figure #10 11
PAGE 12
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Model 860/880V (21/2" - 10") Parts List Item Description Quantity 21/2" 3" 1 Body (860) 1 880-131 880-132 880-133 880-134 880-135 N/A Body (880V) 1 880-193 880-194 880-188 880-189 880-190 880-191 N/A 6" 8" 1.1 Pipe Plug (860) 1 578-171-50 578-171-50 578-171-50 578-171-50 578-171-50 1.
PAGE 13
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Model 860/880V (21/2" - 10") Parts List (continued) Item Description 20.2 Gasket Quantity 21/2" 3" 4" 6" 2 340-078 340-078 340-078 340-078 8" 340-078 10" 340-078 21 R.V.
PAGE 14
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Repair Kits How to order parts and repair kits. 1. Locate item number and kit number in this maintenance manual. 2. Verify the size of the valve the parts are to be used on. 3. Provide full model number located on I.D. plate. 4. Give kit number. 5. A serial number (located on the I.D. plate) will assist in ordering the proper kits. 6. Contact your local FEBCO Parts Distributor.
PAGE 15
MAINTENANCE MANUAL MODELS 860 & 880V 21/2" – 10" Repair Kits (continued) Kit Description 2 /2" 3" 4" 6" 8" 10" 905-320 905-320 905-320 905-320 905-320 905-320 905376 905376 905377 905378 905379 905379 Items 2, 2.1, 15 905-167 905-167 905-168 905-169 905-170 905-171 (880) 880V COVER ASSEMBLY OUTLET CHECK ONLY Items 2.1, 2.
PAGE 16
A Division of Watts Water Technologies, Inc. IOM-F-860_880V 0823 USA: 4381 N. Brawley • Ste. 102 • Fresno, CA • 93722 • Tel. (559) 441-5300 • Fax: (559) 441-5301 • www.FEBCOonline.com Canada: 5435 North Service Rd. • Burlington, ONT. • L7L 5H7 • Tel. (905) 332-4090 • Fax: (905) 332-7068 • www.FEBCOonline.