Victaulic 769N FireLock NXT Series User Manual

I-769N.Preaction/AC-ELEC / Victaulic
®
Series 769N FireLock NXT
™
/ 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 ..................................5
Trim Dimensions .......................................7
Trim Components - Exploded View Drawing -
Electric AutoConvert Dry Release Preaction Trim ...............8
Trim Components - Exploded View Drawing -
Electric AutoConvert Dry Release Preaction Trim with
Redundant Solenoid Valve ............................9
Internal Valve Components - Section View and
Exploded View Drawings ................................10
Air Supply Requirements ................................11
Base- or Riser-Mounted Air Compressors ...................11
Shop Air or Tank-Mounted Air Compressors..................11
Compressor Requirements and Settings for a Series 769N
FireLock NXT Actuated Valve Installed with a Series 746-LPA
Dry Accelerator .......................................11
Settings for Air Supervisory Pressure Switches and Alarm
Pressure Switches .....................................11
SECTION I
Initial System Setup ....................................13
SECTION II
Resetting the System ...................................17
SECTION III
Weekly External Inspection ..............................19
Monthly External Inspection..............................19
SECTION IV
Required Main Drain Test ...............................21
Required Water Flow Alarm Test ..........................22
Required AutoConvert System Test ........................23
Required Water Level and Low-Air Alarm Tests ...............24
Low Water Alarm Test ...............................25
Required Partial Operational Trip Test ......................26
Required Full Operational Trip Test ........................27
SECTION V
Required Internal Inspection .............................29
SECTION VI
Removing and Replacing the Clapper Seal...................31
Removing and Replacing the Clapper Assembly...............32
Installing the Cover Plate Gasket and Cover Plate..............33
Removing and Replacing the Diaphragm ....................34
Cleaning the Cartridge in the Priming Manifold Assembly........35
Replacing the Filter in Series 776 Low-Pressure Actuators.......35
SECTION VII
Troubleshooting .......................................37
Field Wiring Diagrams .......................40 – 43, 46 – 47
Sample Panel Programs......................44 – 45, 48 – 49
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 must install this product in
accordance with all instructions. These i nstructions contain
important information.
• Depressurize and drain the piping system before attempting to
install, remove, adjust, or maintain any Victaulic piping 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 Actuated Valve with Preaction Trim.
For proper operation and approval, the Series 769N FireLock NXT
Actuated Valve and accessories must 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 actuated 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.Preaction/AC-ELEC_4 REV_A

Victaulic 769N FireLock NXT Series Specifications

General

Brand	Victaulic
Model	769N FireLock NXT Series
Category	Control Unit
Language	English