Victaulic FireLock NXT 768 Series User Manual

8 Close the water supply main drain valve slowly.
9. Record the water pressure established after closing the water
supply main drain valve.
10. Compare the residual pressure reading, taken above, to the
residual pressure readings taken in previous main drain tests. If
there is degradation in the residual water supply reading, restore
the proper water supply pressure.
11. Confirm that all valves are in their normal operating positions (refer
to the table below).
Valve
NormalOperating
Position
Diaphragm-Charge-Line Ball Valve Open
Alarm Test Ball Valve Closed
Water Supply Main Control Valve Open
Water Supply Main Drain Valve Closed
System Main Drain Valve Closed
Isolation Ball Valve for Series 746-LPA Dry Accelerator
(if applicable)
Open
¼-Turn Vent Ball Valve for Series 746-LPA Dry Accelerator
(if applicable)
Closed
Slow-Fill Ball Valve of the Victaulic AMTA (if applicable) Open
Fast-Fill Ball Valve of the Victaulic AMTA (if applicable) Closed
Water Motor Alarm Shutoff Valve (European trim only) Open
12. Confirm that there is no leakage from the intermediate valve
chamber. The drip check in the alarm line should not be leaking
water or air.
13. Notify the authority having jurisdiction, remote station alarm
monitors, and those in the affected area that the valve is back in
service.
14. Provide test results to the authority having jurisdiction, if required.
WATERFLOWALARMTEST
Perform the water flow alarm test on a frequency required by the
current NFPA-25 code. The authority having jurisdiction in the area may
require these tests on a more frequent basis. Verify these requirements
by contacting the authority having jurisdiction in the affected area.
1. Notify the authority having jurisdiction, remote station alarm
monitors, and those in the affected area that the water flow alarm
test will be performed.
CAUTION
Usecautiontopreventopeningthesystemmaindrainvalve•
accidentally.
Openingthesystemmaindrainvalvewillcausethevalveto
operate,resultinginpropertydamage.
2. Open the water supply main drain valve fully to flush the water
supply of any contaminants.
I-768_20
FireLockNXT™DryValve
SERIES768
I-768
INSTALLATION,MAINTENANCE,ANDTESTINGMANUAL
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VICTAULIC IS A REGISTERED TRADEMARK OF VICTAULIC COMPANY. © 2007 VICTAULIC COMPANY. ALL RIGHTS RESERVED. PRINTED IN THE USA.
REV_D

Victaulic FireLock NXT 768 Series Specifications

General

Brand	Victaulic
Model	FireLock NXT 768 Series
Category	Control Unit
Language	English