Tyco DV-5 Manual page 25

Step 3. Verify that the DV-5 Valve has
tripped, as indicated by the flow of
water into the system.
Step 4. Close the system's Main
Control Valve (D).
Step 5. Close the Diaphragm Chamber
Supply Control Valve (P).
Step 6. Reset the DV-5 Deluge Valve
in accordance with the Valve Setting
Procedure.
Dry Pilot Actuation
Dry Pilot Actuator Test Procedure
Proper operation of the Dry Pilot Actua-
tor for dry pilot actuation must be veri-
fied as follows:
Step 1. Close the Stop Valve (B).
Step 2. Open the Main Drain Valve (D).
Step 3. Open the Inspector's Test Con-
nection on the Dry Pilot Line.
Step 4. Verify that the flow of water
from the Dry Pilot Actuator (R) drain
connection increases to a full flow.
Step 5. Verify that the Diaphragm
Chamber pressure has decreased
to below 25% of the water supply
pressure.
Step 6. Close the Inspector's Test
Connection and allow the dry pilot line
pressure to re-establish. Check the Dry
Pilot Actuator (R) drain for leaks. Any
leaks must be corrected before pro-
ceeding to the next step.
Step 7. Partially open the Stop Valve
(B). Close the Main Drain Valve (D) as
soon as water discharges from the
drain connection. Observe the Auto-
matic Drain Valve (F) 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 Stop Valve
(B) must then be fully opened.
Low Pressure Alarm and
Condensate Drain for Dry Pilot
Actuation Test Procedures
For Dry Pilot Actuation, testing of the
Dry Pilot Low Pressure Switch (S) and
drainage of the pilot line condensate
must be as follows:
Step 1. Close the Stop Valve (B).
Step 2. Close the Diaphragm Supply
Valve (P).
Step 3. Open the Main Drain Valve (D).
Step 4. Open the Inspector's Test Con-
nection, and slowly relieve pneumatic
pressure. Verify that the Dry Pilot Low
Pressure Switch (S) is operational and
that the low pressure set points are as
follows:
• Low pressure alarm setting at
approximately 0,4 bar below the
minimum pilot line service pressure
requirement shown in Graph B
Nominal
Torque
Valve Sizes
DN
DN40
DN50
DN80
DN100
DN150
DN200
TABLE C
DIAPHRAGM COVER BOLTS
MAXIMUM TORQUE
• Fire alarm setting at approximately
1,0 bar below the minimum pilot line
service pressure requirement shown
in Graph B
Step 5. Close the Inspector's Test Con-
nection and allow the Dry Pilot Line to
automatically repressurize.
Step 6. Individually open each low
point drain and then close after dis-
charge of any trapped condensate.
Step 7. Allow the Dry Pilot Line to auto-
matically repressurize.
Step 8. Open the Diaphragm Supply
Valve (P).
Step 9. Partially open the Stop Valve.
Close the Main Drain Valve (D) as soon
as water discharges from the drain
connection. Observe the Automatic
Drain Valve (F) for leaks. If there are
leaks, determine/correct the cause of
the leakage problem. If there are no
leaks, fully open the Stop Valve (B).
Electric Actuation
Solenoid Valve Test Procedure
Proper operation of the Solenoid Valve
for electric actuation must be verified
as follows:
Step 1. Close the Stop Valve (B).
Step 2. Open the Main Drain Valve (D).
Step 3. Test the deluge releasing panel
in accordance with the manufacturer's
instructions to energize the solenoid
valve.
Step 4. Verify that the flow of water
from the Solenoid Valve drain connec-
tion increases to a full flow.
Step 5. Verify that the Diaphragm
Chamber pressure has decreased
to below 25% of the water supply
pressure.
Step 6. Reset the electric detection
system in accordance with the manu-
facturer's instructions to de-energize
Nm
the solenoid valve. Check the Solenoid
Valve drain for leaks. Any leaks must
be corrected before proceeding to the
22
next step.
Step 7. Partially open the Stop Valve
29
(B). Close the Main Drain Valve (D) as
soon as water discharges from the
54
drain connection. Observe the Auto-
matic Drain Valve (F) for leaks. If there
are leaks, determine/correct the cause
65
of the leakage problem. If there are no
leaks, the DV-5 Valve is ready to be
72
placed in service and the Stop Valve
(B) must then be fully opened.
87
Internal Valve Inspection
Once every five years during the annual
operational test procedure and prior
to the DV-5 Deluge Valve being reset,
the interior of the Deluge Valve must
be cleaned and inspected for wear
and damage. Damaged or worn parts
must be replaced. (Replacement of the
Diaphragm every ten years is recom-
mended, or more frequently if inspec-
tions and/or wear and tear warrant
more frequent replacement.)
When reinstalling the Diaphragm Cover,
complete the following steps to assure
the Diaphragm Cover Fasteners (Hex
Bolts) are uniformly and securely
tightened.
Step 1. Align Diaphragm and Dia-
phragm Cover in proper orientation
with valve body (Ref. Figure 1) and hold
in place
Step 2. Assemble Flat Washers onto
Hex Bolts
Step 3. Apply LOCTITE No. 242 (or
equivalent) to Hex Bolt threads
Step 4. Insert Hex Bolts through Dia-
phragm Cover and Diaphragm, hand-
tighten into valve body
Step 5. Using crossdraw sequence to
assure uniformity, wrench-tighten Hex
Bolts to appropriate torque values (Ref.
Table C)
Step 6. Inspect to assure all Hex Bolts
are securely tightened
NOTICE
If the water supply contains chemi-
cals which tend to attack a Nylon fab-
ric-reinforced, natural rubber or the
five year inspection indicates a build-
up of debris within the Deluge Valve
that could affect its proper operation,
then the frequency of the internal valve
inspection procedure must be appro-
priately increased. If the system has
a seawater or brackish water supply,
then the frequency of the internal valve
inspection procedure must be appro-
priately increased. (An annual internal
TFP1335
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