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
746-LPA Dry Accelerator.
Check for air loss at the lower chamber seal. If a leak is present, turn
the adjustment nut counterclockwise to seal.
Check for any leaks in the system and trim. Confi rm that the air
maintenance trim assembly (AMTA) is operating properly.
The Series 746-LPA Dry Accelerator does not operate within a
5-psi/34-kPa pressure drop in system air pressure.
There is a loss of air pressure in the upper air chamber of the Series
746-LPA Dry Accelerator.
Apply soapy water to all joints around the Series 746-LPA 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
(inspector’s test connection).
If the above procedures do not work, contact Victaulic.
The Series 746-LPA Dry Accelerator does not set up properly
(cannot get pressure on the upper gauge, and the button pops up
immediately when pressure is introduced).
The Series 746-LPA Dry Accelerator is installed upside-down.
Remove the Series 746-LPA Dry Accelerator from the trim, and
turn the unit around so that the vent seal “button” is facing down
(toward the actuator).
WCAS-6TMG37
I-746.LPA
Series 746-LPA
INSTRUCTIONS FOR INSTALLING AND REPAIRING SERIES 746-LPA DRY ACCELERATORS
I-746.LPA
INSTALLATION AND REPAIR KIT INSTRUCTIONS
UPDATED 10/2006
I-746.LPA 4603 REV A Z000746LPA
VICTAULIC IS A REGISTERED TRADEMARK OF VICTAULIC COMPANY. © 2006 VICTAULIC COMPANY. ALL RIGHTS RESERVED. PRINTED IN THE USA.
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