5.
8. Inspect and replace any portion of the sprinkler system
subjected to fire conditions.
9. Verify that the following valves are in their respective posi-
tions prior to continuing:
Manual Emergency Release - open
Main Drain Valve - open
Alarm Line Valve - open
Alarm Test Valve - closed
Condensate Drain valve - closed
Air/Nitrogen Supply Valves - closed
10. Open pushrod chamber supply valve and allow water to
fill the pushrod chamber. Close the Manual Emergency
Release valve after any trapped air has had a chance to
escape from the deluge valve’s pushrod chamber.
11. Upon seeing this solid flow of water coming out of the
Model LP Dry Pilot Actuator, open the Rapid-Air Fill Valve
thereby rapidly applying compressed air or nitrogen into
the Model LP Dry Pilot Actuator and the sprinkler system
until the pressure conforms to Table A levels, as indicat-
ed by the system air pressure gauge. The Model LP Dry
Pilot Actuator will eventually close during this pressuriz-
ing process and water will stop flowing through the drain
tube. At this point, the pressure gauge on the pushrod
chamber pressure will equalize to the available water
supply pressure. Once the actuator is set up correctly,
close the Rapid-Air Fill Valve and open the Regulated Air
Shutoff Valve.
Note:
For systems using nitrogen as the primary source,
the system may be set up using the nitrogen source fol-
lowing the steps above. The air compressor, if present,
may then be placed into operation as the backup pneu-
matic source.
12. Open the alarm line valve.
13. If the Model B1 Accelerator Kit is installed, open valve P.
Prior to opening valve P, be sure that the Model B1 Ac-
celerator has been successfully reset per Reliable Tech-
nical Bulletin 323.
Note:
The B1 Accelerator requires a minimum of 15 psi
(1,0 bar) supervisory air or nitrogen pressure for proper
operation.
14. Slightly open the main valve controlling water supply to
the Model DDX-LP Deluge Valve. This will begin to fill the
deluge valve beneath the clapper with water. Once any
trapped air has been vented, close the main drain valve.
Observe if water leaks through the ball drip valve into the
1” drain manifold through the clear tubing. If no leakage
occurs, the deluge valve clapper is sealed. Fully open
the main valve controlling the water supply to the Model
DDX-LP Deluge Valve and that it is properly monitored
15. Verify that the pushrod chamber supply valve is open.
16. Secure the handle of the Model B Manual Emergency
Station in the OFF position with a nylon tie (supplied with
the assembly).
Inspection And Testing Of The DDX-LP PrePaK
Systems (Refer to Figure 2)
1. Water supply
— Verify that the valve controlling water
supply to the deluge valve is opened fully and properly
monitored.
2. Pushrod Chamber supply
— Verify that the valve sup-
plying water to the pushrod chamber is open.
3. Other trimming valves
— Verify that the alarm line valve
is open as well as all of the pressure gauge valves. The
main drain valve, alarm test valve, and condensate drain
valve should be closed.
4. Ball drip valve
— Push in on the plunger to be sure the
ball check is off its seat. If no water appears, the deluge
valve’s water seat is tight. Inspect the small bleed hole lo-
cated on the underside of the Model DDX-LP Deluge Valve
pushrod chamber for leakage.
5. System air pressure
— Verify that system air pressure
is in conformance with the values posted in Table A for the
supply water pressure.
6. Releasing device
— Check the outlet of the (Model LP
Dry Pilot Actuator and Model B Manual Emergency Sta-
tion) for leakage. Also verify that tubing drain lines from
releasing devices are not pinched or crushed which could
prevent proper releasing of the deluge valve.
7. Testing alarms
— Open the alarm test valve permitting
water from the supply to flow to the alarm pressure switch
and to the mechanical sprinkler alarm (if present). After
testing, close this valve completely. Push in on the plunger
of ball drip until all of the water has drained from the alarm
line.
8. Operational test
— Open the Model B Manual Emergen-
cy Station or, alternatively, reduce air/nitrogen pressure on
the system.
Note:
An operational test will cause the Del-
uge Valve to open and flow water into the sprinkler system.
9. Secure the Model B Manual Emergency Station
in the
OFF position with a nylon tie (included with the assembly)
after the deluge valve is reset.
Testing the Model DDX-LP Deluge Valve With-
out Flowing Water (Refer to Figure 2)
1. Close the valve controlling water supply to deluge valve
and open the main drain.
2. Verify that the pushrod chamber supply valve is open, al-
lowing water to enter the pushrod chamber.
3. Close the air/nitrogen supply to the sprinkler system.
4. Decrease pneumatic pressure in the system by opening
the condensate drain valve, until the Model LP Dry Pilot
Actuator operates. Doing so will result in a sudden drop of
water pressure in the deluge valve pushrod chamber.
5. Reset the system per the directions listed in “System Set-
up” section of this bulletin.
(cont. bottom of page 8)
Summary of Contents for N2-Blast DDX-LP PrePaK
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