Johnson Controls tyco DV-5A Manual page 15

Dry Pilot Actuation
Operation Test Procedure
Proper operation of the DV-5
such as opening of the DV-5
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 System Main Control Valve (B).
Open Main Drain Valve (D).
• Open System Main Control Valve (B)
one turn beyond position at which
water just begins to flow from Main
Drain Valve (D).
• Slowly close the 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 prevented from
flowing beyond the riser.
Step 3. Verify that the DV-5
tripped, as indicated by the flow of
water into the system.
Step 4. Close the System Main Control
Valve (B).
Step 5. Close the Diaphragm Supply
Valve (P).
Step 6. Reset the DV-5 Valve in accor-
a
dance with the Valve Setting Procedure.
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 System Main Control
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 there is a flow of
water from the Dry Pilot Actuator (U)
drain connection.
Step 5. Verify that the Diaphragm
Chamber pressure has decreased
to below 25% of the water supply
Valve,
a
pressure.
Valve as
a
Step 6. Close the Inspector's Test
Connection and allow the dry pilot line
pressure to re-establish, and proceed
as follows:
• Water should cease draining from
the Dry Pilot Actuator (U) but remain
draining from the Manual Reset Actu-
ator (N).
• Press the Reset Knob on the Man-
ual Reset Actuator (N) and hold it a
few seconds until water stops flow-
ing from its drain valve.
• Pressure will then build up in the
DV-5 Diaphragm Chamber.
a
• After system pressure is restored
in the DV-5
inspect the Dry Pilot Actuator (U) and
Manual Reset Actuator (N) for leaks
Valve has
a
at the drain tubes. Any leaks must be
corrected before proceeding to the
next step.
Step 7. Partially open the System Main
Control Valve (B). Slowly close the Main
Drain Valve (D) as soon as water dis-
charges from the Main Drain Valve (D)
and then close the Main Drain Valve
(D). Observe the Automatic Drain Valve
(F) for leaks. If there are leaks, deter-
mine/correct the cause of the leakage
problem. If there are no leaks, the
DV-5 Valve is ready to be placed in
a
service and the System Main Control
Valve (B) must then be fully opened.
Low Pressure Alarm and
Condensate Drain for Dry Pilot
Actuation Test Procedures
Testing of the Dry Pilot Low Pressure
Switch (W) and drainage of the pilot
line condensate must be performed as
follows:
Step 1. Close the System Main Control
Valve (B).
Step 2. Close the Diaphragm Supply
Valve (P).
Step 3. Open the Main Drain Valve (D).
Diaphragm Chamber,
a
Page 15 of 18
Step 4. Open the Inspector's Test Con-
nection, and slowly relieve pneumatic
pressure. Verify that the Dry Pilot Low
Pressure Switch (W) is operational and
that the low pressure set points are as
follows:
• Low pressure alarm setting at
approximately 6 psi (0,4 bar) below
the minimum pilot line service pres-
sure requirement shown in Graph B
• Fire alarm setting at approximately
14.5 psi (1,0 bar) below the minimum
pilot line service pressure require-
ment 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.
The gauge test valve to which the Dry
Pilot Line Gauge (Y) is connected must
be used as a low point drain. Close the
gauge test valve, remove the plug, and
partially open the gauge test valve (as
necessary, collect water in a cup). After
condensate water ceases to drain,
close the gauge test valve, replace the
plug, and then completely open the
gauge test valve.
Step 7. Allow the Dry Pilot Line to auto-
matically repressurize.
Step 8. Open the Diaphragm Supply
Valve (P).
Step 9. Partially open the System Main
Control Valve (B). Slowly close the Main
Drain Valve (D) as soon as water dis-
charges from the Main Drain Valve (D).
Observe the Automatic Drain Valve
(F) for leaks. If there are leaks, deter-
mine/correct the cause of the leakage
problem. If there are no leaks, the
DV-5 Valve is ready to be placed in
a
service and the System Main Control
Valve (B) must then be fully opened.
TFP1416