TFP1410
Page 13 of 14
air pressure of 10 psi (0,69 bar). Ob-
serve the Automatic Drain Valve for
leaks. If there are leaks, determine/cor-
rect the cause of the leakage problem
within the Riser Check Valve.
NOTE: In order to prevent the pos-
sibility of a subsequent operation of
an over-heated solder type automat-
ic sprinkler, any solder type automat-
ic sprinklers that were possibly ex-
posed to a temperature greater than
their maximum rated ambient must be
replaced.
Step 12. Slowly open the Main Con-
trol Valve. Close the Main Drain Valve
as soon as water discharges from the
drain connection. Observe the Auto-
matic Drain Valve for leaks. If there are
leaks, determine/correct the cause of
the leakage problem. If there are no
leaks, the DV-5 Valve is ready to be
placed in service and the Main Control
Valve must then be fully opened.
NOTES: When the Main Control Valve
is opened, the pressure on the Dia-
phragm Chamber may increase. This
increase in pressure is normal, and if
the pressure is greater than 250 psi
(17,2 bar), the pressure is to be relieved
by partially and temporarily opening
the Manual Control Station; however,
do not allow the pressure as indicated
on the Diaphragm Chamber Pressure
Gauge to drop below the supply pres-
sure shown on the Water Supply Pres-
sure Gauge, since this action may re-
sult in tripping of the DV-5 Valve.
After setting a fire protection system,
notify the proper authorities and advise
those responsible for monitoring pro-
prietary and/or central station alarms.
Care and
Maintenance
The following procedures and inspec-
tions must be performed as indicated,
in addition to any specic requirements
of the NFPA, and any impairment must
be immediately corrected.
Before closing a re protection system
main control valve for maintenance
work on the re protection system that
it controls, permission to shut down the
affected re protection systems must
rst be obtained from the proper au-
thorities and all personnel who may be
affected by this action must be notied.
The owner is responsible for the in-
spection, testing, and maintenance of
their re protection system and devices
in compliance with this document, as
well as with the applicable standards
of the National Fire Protection Associa-
tion (e.g., NFPA 25), in addition to the
standards of any authority having juris-
diction. Contact the installing contrac-
tor or product manufacturer with any
questions.
It is recommended that automatic
sprinkler systems be inspected, tested,
and maintained by a qualied Inspec-
tion Service in accordance with local
requirements and/or national codes.
NOTICE
Some of the procedures outlined in
this section will result in operation of
the associated alarms. Consequently,
notification must first be given to the
owner and the fire department, central
station, or other signal station to which
the alarms are connected.
When the system is using either a sea-
water or brackish water supply, inter-
nal and external inspection of the DV-5
Valve and Trim is essential. Parts show-
ing any signs of corrosion must be re-
placed to ensure the integrity of the
system.
Annual Operation Test Procedure
Proper operation of the DV-5 Valve (i.e.,
opening of the DV-5 Valve as during a
re condition) must be veried at least
once a year as follows:
Step 1. If water must be prevented
from owing beyond the riser, perform
the following steps.
• Close the Main Control Valve. Open
the Main Drain Valve.
•
Open the Main Control Valve one turn
beyond the position at which water
just begins to ow from the Main
Drain Valve.
• Close the Main Drain Valve.
Step 2. Open the Wet Pilot Line In-
spector’s Test Connection.
NOTE: Be prepared to quickly perform
Steps 3, 4, and 5 if water must be pre-
vented from flowing beyond the riser.
Step 3. Verify that the DV-5 Valve has
tripped, as indicated by the ow of wa-
ter into the system.
Step 4. Close the system’s Main Con-
trol Valve.
Step 5. Close the Diaphragm Chamber
Supply Control Valve and the Supervi-
sory Air Supply Control Valve.
Step 6. Reset the DV-5 Deluge Valve
in accordance with the Valve Setting
Procedure.
Quarterly Waterflow Alarm Test
Procedure
Testing of the system waterow alarms
must be performed quarterly. To test
the waterow alarm, open the Alarm
Test Valve, which will allow a ow of
water to the Pressure Alarm Switch
and/or Water Motor Alarm. Upon sat-
isfactory completion of the test, close
the Alarm Test Valve.
Quarterly Supervisory Low
Pressure Alarm Test Procedure
Proper operation of the Supervisory
Low Pressure Alarm Switch must be
performed quarterly as follows:
Step 1. Crack open the System Main
Drain Valve for the Riser Check Valve
(Item P7, Figure 3A) to slowly relieve su-
pervisory air pressure from the system.
Verify that the Supervisory Low Pres-
sure Alarm Switch is operational and
that the low pressure set point is ap-
proximately 5 psi (0,34 bar).
Step 2. Close the System Main Drain
Valve (Item P7, Figure 3A) and allow the
system supervisory pressure of 10 ± 2
psi (0,69 ± 0,14 bar) to be automatical-
ly re-established. The Supervisory Low
Pressure Alarm Switch should return to
its “normal” condition.
Pressure Relief Valve Maintenance
Over pressurization of the system pip-
ing with air will result in the opening
of the Pressure Relief Valve (Item P4,
Fig. 3A). If the Relief Valve continues
to bleed air after the system pressure
has been reduced to its normal su-
pervisory pressure range of 10 ± 2 psi
(0,69 ± 0,14 bar), most likely debris be-
came lodged in the seating area. To
help clean the seating area, slowly pull
up on the ring at the top of the Relief
Valve to allow a full ow of air through
the Relief Valve, and then release the
ring to allow the Relief Valve to snap
closed. Repeat the cleaning procedure
as necessary.
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