TFP1335
Page 24 of 26
Should this condition occur, imme-
diately close the stop valve and use
the following procedure to reset the
system:
Step 1. Prior to the water supply pres-
sure being restored to the closed stop
valve, note the pressure indicated by
the diaphragm chamber pressure
gauge and determine if the pressure
is within the normally expected range.
Step 2. If the diaphragm chamber pres-
sure is below the normal range, check
for and correct any source of leakage
from the diaphragm chamber prior to
resetting the system.
Step 3. After the water supply pressure
is restored to the stop valve, reset the
DV-5 Deluge Valve in accordance with
the Valve Setting Procedure section.
NOTICE
For fire protection systems subject to
an emergency impairment caused by
an interrupted water supply condition,
it is recommended that consideration
be given to installing a low water supply
pressure switch with the appropriate
alarm/indications to monitor the water
supply pressure.
Waterflow Alarm Test Procedure
To test the waterflow alarm, open the
Alarm Test Valve (G), which will allow
a flow of water to the Waterflow Switch
(C) and/or Water Motor Alarm. Upon
satisfactory completion of the test,
close the Alarm Test Valve (G).
Wet Pilot Actuation
Operation Test Procedure
Proper operation of the DV-5 Valve (i.e.,
opening of the DV-5 Valve as during
a fire condition) must be verified as
follows:
Step 1. If water must be prevented
from flowing beyond the riser, perform
the following steps.
• Close Stop Valve (B). Open Main
Drain Valve (D).
• Open Stop Valve (B) one turn beyond
the position at which water just
begins to flow from Main Drain Valve
(D).
• Close Main Drain Valve (D).
Step 2. Open the Inspector’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 flow of
water into the system.
Step 4. Close the Main Control Valve
(D).
Step 5. Close the Diaphragm Supply
Valve (P).
Step 6. Reset the DV-5 Deluge Valve
in accordance with the Valve Setting
Procedure.
Dry Pilot Actuation
Operation Test Procedure
Proper operation of the DV-5 Valve (i.e.,
opening of the DV-5 Valve as during
a fire condition) must be verified as
follows:
Step 1. If water must be prevented
from flowing beyond the riser, perform
the following steps.
• Close Stop Valve (B). Open Main
Drain Valve (D).
• Open Stop Valve (B) one turn beyond
the position at which water just
begins to flow from Main Drain Valve
(D).
• Close Main Drain Valve (D).
Step 2. Open the Inspector’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 flow of
water into the system.
Step 4. Close the Main Control Valve
(D).
Step 5. Close the Diaphragm Supply
Valve (P).
Step 6. Reset the DV-5 Deluge Valve
in accordance with the Valve Setting
Procedure.
Electric Actuation
Operation Test Procedure
Proper operation of the DV-5 Valve (i.e.,
opening of the DV-5 Valve as during
a fire condition) must be verified as
follows:
Step 1. If water must be prevented
from flowing beyond the riser, perform
the following steps:
• Close Stop Valve (B). Open Main
Drain Valve (D).
• Open Stop Valve (B) one turn beyond
the position at which water just
begins to flow from Main Drain Valve
(D).
• Close Main Drain Valve (D).
Step 2. Test the deluge releasing panel
in accordance with the manufacturer’s
instructions to energize the solenoid
valve.
NOTE: Be prepared to quickly perform
Steps 3, 4, and 5, if water must be pre-
vented from flowing beyond the riser.
Care and
Maintenance
The following procedures and inspec-
tions must be performed as indicated,
in addition to any specific requirements
of the standards recognized by the
Approval agency, and any impairment
must be immediately corrected.
NOTICE
The frequency at which the following
procedures and inspections are to be
performed are to be in accordance
with any specific requirements of the
standards recognized by the Approval
agency.
Before closing a fire protection system
main control valve for maintenance
work on the fire protection system that
it controls, permission to shut down
the affected fire protection systems
must first be obtained from the proper
authorities and all personnel who may
be affected by this action must be
notified.
The owner is responsible for the
inspection, testing, and maintenance
of their fire protection system and
devices in compliance with this doc-
ument, as well as with the applicable
standards recognized by the Approval
agency. 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 qualified Inspec-
tion Service in accordance with the
standards recognized by the Approval
agency.
Drop in Water Supply Pressure
Below Normal Range
NOTICE
If the water supply pressure is signif-
icantly reduced below the normally
expected static pressure range (as
could occur in the case of a water main
break or repair), and there is a subse-
quent drop in the diaphragm chamber
water pressure below its normal range
(due, for example, to a leak in a piping
connection to or from the diaphragm
chamber or, a leak in the diaphragm
chamber check valve caused by dirt or
debris in the check valve seal area), a
deluge valve such as the DV-5 could
inadvertently trip, if its water supply
pressure is quickly restored.
A drop in the water supply pressure
to below its normal range (as in the
case of an interrupted water supply
condition) constitutes an emergency
impairment.
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