I-769N.Deluge
/ Series 769N FireLock NXT
™
Deluge Valve
/ Installation, Maintenance, and Testing Manual
TABLE OF CONTENTS
Hazard Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installer Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Important Installation Information . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Hydrostatic Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Receiving the Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Trim Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Trim Components - Exploded View Drawing -
Pneumatic (Dry Pilot) Release Trim . . . . . . . . . . . . . . . . . . . . . . . . . 8
Trim Components - Exploded View Drawing -
Hydraulic (Wet Pilot) Release Trim . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Trim Components - Exploded View Drawing -
Electric Release Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Internal Valve Components - Section View and
Exploded View Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Air Supply Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Base- or Riser-Mounted Air Compressors . . . . . . . . . . . . . . . . . . . 12
Shop Air or Tank-Mounted Air Compressors. . . . . . . . . . . . . . . . . . 12
Settings for Air Supervisory Pressure Switches and Alarm
Pressure Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Wet Pilot Line Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-15
SECTION I
Initial System Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SECTION II
Resetting the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SECTION III
Weekly External Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Monthly External Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
SECTION IV
Required Main Drain Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Required Water Flow Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Required Water Level and Low-Air Alarm Tests . . . . . . . . . . . . . . . 27
Required Partial Operational Trip Test . . . . . . . . . . . . . . . . . . . . . . 28
Required Full Operational Trip Test . . . . . . . . . . . . . . . . . . . . . . . . 29
SECTION V
Required Internal Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
SECTION VI
Removing and Replacing the Clapper Seal. . . . . . . . . . . . . . . . . . . 33
Removing and Replacing the Clapper Assembly. . . . . . . . . . . . . . . 34
Installing the Cover Plate Gasket and Cover Plate. . . . . . . . . . . . . . 35
Removing and Replacing the Diaphragm . . . . . . . . . . . . . . . . . . . . 36
Cleaning the Cartridge in the Air and Priming Manifold
Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Replacing the Filter in Series 776 Low-Pressure Actuators
(Dry Pilot Release Systems) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
SECTION VII
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
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 and property damage if instructions are not
followed.
CAUTION
• The use of the word “CAUTION” identifies possible hazards or
unsafe practices that could result in personal injury and product
or property damage if instructions are not followed.
NOTICE
• The use of the word “NOTICE” identifies special instructions
that are important but not related to hazards.
INSTALLER SAFETY INFORMATION
WARNING
• An experienced, trained installer shall install this product in
accordance with all instructions. These i nstructions contain
important information.
• Always verify that the piping system has been completely
depressurized and drained immediately prior to installation,
removal, adjustment, or maintenance of any Victaulic products.
Failure to follow these instructions can cause product failure,
resulting in death or serious personal injury and property damage.
1. Read and understand all instructions and refer to the trim
diagrams before installing, maintaining, or testing this Victaulic
Series 769N FireLock NXT Deluge Valve.
For proper operation
and approval, the Series 769N FireLock NXT Deluge Valve and
accessories shall be installed in accordance with the specific trim
diagrams included with the shipment.
2. Use only recommended accessories.
Accessories and equipment
that are not approved for use with this deluge valve may cause
improper system operation and property damage.
3. Wear safety glasses, hardhat, foot protection, and hearing
protection.
Wear hearing protection if you are exposed to long
periods of noisy jobsite operations.
4. Prevent back injury.
Valve assemblies require more than one
person (or mechanical lifting equipment) to position and install the
assembly. Always practice proper lifting techniques.
5. Keep work areas clean.
Keep the work area clean and well lit, and
allow enough space to accommodate proper installation of the
valve, trim, and accessories.
6. Avoid pinch points.
Due to the weight of the valve body, use
caution around pinch points and spring-loaded components (i.e.
clapper assembly) in order to prevent bodily injury.
I-769N.Deluge_4
REV_F
