Victaulic FireLock NXT 776 Series User Manual

VICTAULICSERIES757PAIRMAINTENANCETRIMASSEMBLY
(AMTA)WITHPRESSURESWITCHOPTION
NOTICE
VictaulicrecommendsamaximumoftwoSeries769FireLock•
NXTDelugeValveswithdrypilottrimperSeries757PAMTA
withPressureSwitch.
RefertotheI-757PAirMaintenanceTrimAssemblywith•
PressureSwitchInstallationInstructions,suppliedwiththe
product,forcompleteinstallation,electrical,andpressure
switchadjustmentinformation.
5
2
12
7
8
15
10
16
9
6
4
1
13
3
14
11
TO
SYSTEM
FROM
COMPRESSOR
Bill of Materials
Item Qty. Description
1 1 Restrictor (½-inch NPT)
2 1 Strainer (½-inch NPT)
3 1 Swing Check (½-inch NPT)
4 1 Slow-Fill Ball Valve
(Normally Open)
5 1 Spring-Loaded, Soft-Seated
Check Valve
6 1 Pressure Switch
7 2 Compression Fitting, Straight
(¼-inch NPT x ¼-inch Tube)
8 1 Copper Tubing (¼-inch OD)
9 11 Close Nipple
(½-inch NPT x 1.13)
10 1 Nipple (½-inch NPT x 4.00)
11 1 90° Female Elbow (½-inch NPT)
12 4 Female Tee (½-inch NPT)
13 3 Union (½-inch NPT)
14 2 Reducing Bushing
(½-inch NPT x ¼-inch NPT)
15 1 Fast-Fill Ball Valve
(Normally Closed)
16 1 Pressure Switch Isolation Ball
Valve (Normally Open -
Lockable)
SETTINGSFORAIRSUPERVISORYPRESSURESWITCHESAND
ALARMPRESSURESWITCHES
1. Air supervisory pressure switches are required for dry systems and
must be set according to the following notes. NOTE: Switches for
Vic-Quick Risers are pre-set at the factory.
1a. Wire the air supervisory pressure switches to activate a
low-pressure alarm signal. NOTE: In addition, the local
authority having jurisdiction may require a high-pressure
alarm. Contact the local authority having jurisdiction for this
requirement.
1b. Set the air supervisory pressure switches to activate at
2 – 4 psi/14 – 28 kPa/0.1 – 0.3 Bar below the minimum air
pressure required (but not lower than 10 psi/69 kPa/0.7 Bar).
1c. Wire the alarm pressure switch to activate a water flow alarm.
1d. Set the alarm pressure switch to activate on a pressure rise of
4 – 8 psi/28 – 55 kPa/0.3 – 0.6 Bar.
IMPORTANTINSTALLATIONINFORMATION
1. For proper operation and approval, the Series 769 FireLock NXT
Deluge Valve must be installed in accordance with the specific trim
diagrams included with the shipment.
2. Before installing the Series 769 FireLock NXT Deluge Valve, flush
the water supply piping thoroughly to remove all foreign material.
3. Series 769 FireLock NXT Deluge Valves MUST NOT be located in
an area where the valve can be exposed to freezing temperatures.
In addition, the Series 769 FireLock NXT Deluge Valve MUST NOT
be located in an area where physical damage may occur.
4. It is the system designer’s responsibility to confirm material com-
patibility of the Series 769 FireLock NXT Deluge Valve, trim, and
associated accessories when a corrosive environment or contami-
nated water is present.
5. SERIES769FIRELOCKNXTDELUGEVALVESMUSTBE
INSTALLEDONLYINTHEVERTICALPOSITIONWITHTHE
ARROWONTHEBODYPOINTINGUPWARD.
6. Air or nitrogen supply to the dry piping system must be clean, dry,
and oil-free.
7. Air supplies must be regulated, restricted, and continuous.
8. When the Series 769 FireLock NXT Deluge Valve is used
with a water motor alarm, Victaulic recommends the use of
an uninterrupted, low-pressure alarm that is installed on the
diaphragm charge line downstream of the strainer/check restrictor.
9. Per NFPA 13 requirements, piping must be pitched so that
systems can drain properly. For areas that are subject to high
levels of condensation, or where piping is not properly pitched, an
optional Series 75D Water Column Device kit is available to assist
in automatically draining water out of the riser.
I-769D_13
FireLockNXT™DelugeValve
SERIES 769
I-769DINSTALLATION,MAINTENANCE,ANDTESTINGMANUAL
www.victaulic.com
VICTAULIC IS A REGISTERED TRADEMARK OF VICTAULIC COMPANY. © 2007 VICTAULIC COMPANY. ALL RIGHTS RESERVED. PRINTED IN THE USA.
REV_D

Victaulic FireLock NXT 776 Series Specifications

General

Brand	Victaulic
Model	FireLock NXT 776 Series
Category	Control Unit
Language	English