TABLE OF CONTENTS
Hazard Identification ......................................1
Installer Safety Instructions .................................2
General ..............................................2
Maintenance and Testing .................................2
Introduction .............................................3
Trim Dimensions .........................................3
Exploded View Drawing – Trim Components ....................4
Exploded View Drawing – Internal Valve Components..............5
Important Installation Information ............................6
Valve/Trim Installation .....................................6
Hydrostatic Testing .......................................6
Placing the System in Service ...............................7
External Inspection
.......................................9
Weekly Inspection ......................................9
Monthly Inspection .....................................9
Required System Tests
...................................10
Main Drain Test .......................................10
Water Flow Alarm Test ..................................12
Required Internal Inspection ...............................13
Maintenance ...........................................14
Removing and Replacing the Clapper Seal
for DN80, DN100, and DN150 Size Valves ................14
Removing and Replacing the Clapper Seal
for DN200 Size Valves ................................16
Removing and Replacing the Clapper Assembly (All Sizes).......18
Installing the Cover Plate Gasket and Cover Plate..............19
Troubleshooting – Series 751 FireLock European
Alarm Check Valve Stations ..............................20
HAZARD IDENTIFICATION
Definitions for identifying the various hazard levels are
provided below. When you see this symbol, be alert to
the possibility of personal injury. Carefully read and fully
u nderstand the message that follows.
WARNING
• The use of the word “WARNING” identifies the presence of
hazards or unsafe practices that could result in death or serious
personal injury if instructions, including recommended precau-
tions, are not followed.
CAUTION
• The use of the word “CAUTION” identifies possible hazards or
unsafe practices that could result in personal injury and prod-
uct or property damage if instructions, including recommended
precautions, are not followed.
NOTICE
• The use of the word “NOTICE” identifies special instructions
that are important but not related to hazards.
I-751.VDS / Series 751 FireLock
™
European Alarm Check Valve Stations / Installation, Maintenance, and Testing Manual
I-751.VDS_1REV_F