Name: Victaulic FireLock NXT 769 Series
Brand: Victaulic
Rating: 4 (1 reviews)

To Next Page

To Previous Page

TROUBLESHOOTING–SERIES776LOW-PRESSUREACTUATOR

Problem PossibleCause Solution

When the Auto Vent Sleeve of the Series 776 Low-Pressure Actuator

is pulled up, the screw does not stay set in the “UP” position.

The Series 776 Low-Pressure Actuator is not receiving enough air. Increase the air pressure going into the Series 776 Low-Pressure Actuator.

The Series 776 Low-Pressure Actuator has a broken seal. If the above procedure does not work, contact Victaulic.

Water is leaking through the Series 776 Low-Pressure Actuator. The air chamber of the Series 776 Low-Pressure Actuator is not set. Make sure the vent seal of the Series 776 Low-Pressure Actuator is in the

set position and the air chamber is pressurized.

The strainer on the Series 776 Low-Pressure Actuator is clogged. Replace the strainer screen of the Series 776 Low-Pressure Actuator.

Refer to the “Replacing the Strainer Screen for Series 776 Low-Pressure

Actuators” section.

The Series 776 Low-Pressure Actuator has a ripped diaphragm. If water still leaks through the Series 776 after performing the above

procedures, contact Victaulic.

No water is passing through the Series 776 Low-Pressure Actuator. The strainer on the diaphragm charge line is clogged. Disassemble and clean the diaphragm charge line strainer. Refer to the

applicable trim drawing for details.

TROUBLESHOOTING–SERIES746-LPADRYACCELERATOR

Problem PossibleCause Solution

The valve operates without sprinkler activation. There is a loss of air pressure in the lower inlet chamber of the Series Check for air loss at the lower chamber seal. If a leak is present, turn the

746-LPA Dry Accelerator. adjustment nut counterclockwise to seal.

Check for any leaks in the system and trim. Conrm that the AMTA is

operating properly.

The Series 746-LPA Dry Accelerator does not operate within a There is a loss of air pressure in the upper air chamber of the Series 746-LPA Apply soapy water to all joints around the Series 746-LPA Dry Accelerator

5-psi/0.3-Bar pressure drop in system air pressure. Dry Accelerator. to check for leaks. Repair any leaks and re-test.

The air decay rate of the system is too slow. Make sure there are no restrictions in the remote system test valve (inspec-

tor’s test connection).

If the above procedures do not work, contact Victaulic.

The Series 746-LPA Dry Accelerator does not set up properly (cannot The Series 746-LPA Dry Accelerator is installed upside-down. Remove the Series 746-LPA Dry Accelerator from the trim. Turn the unit

get pressure on the upper gauge, and the button pops up immedi- around so that the vent seal “button” is facing down (toward the actuator).

ately when pressure is introduced).

TROUBLESHOOTING–SERIES753-ESOLENOIDVALVE

Problem PossibleCause Solution

No water is passing through the Series 753-E Solenoid Valve. The strainer on the diaphragm charge line is clogged. Disassemble and clean the diaphragm charge line strainer. Refer to the

applicable trim drawing for details.

The Series 776 Low Pressure Actuator does not open. No power is going to the solenoid. Check all electrical connections to make sure power is being supplied to

the solenoid.

TROUBLESHOOTING–AUTOCONVERTTRIMASSEMBLY

Problem PossibleCause Solution

When power is introduced, there is pressure loss during the decay

test.

Debris is present in the 3-in-1 Strainer/Check/Restrictor assembly of the

feed line.

Disassemble and clean the 3-in-1 Strainer/Check/Restrictor assembly in

the feed line of the AutoConvert Trim Assembly.

There is blow-by through the Latching Solenoid Module. Replace the Latching Solenoid Module.

When power is not introduced, there is no pressure loss during the

decay test.