TFP1321
Page 8 of 18
• If the Diaphragm Gauge (K) indicates
no drop in pressure, re-open the Dia-
phragm Supply Valve (P) and pro-
ceed to the next step.
Step 10. Partially open the System
Main Control Valve (B). Slowly close the
Main Drain Valve (D) as soon as water
discharges 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 before proceeding.
NOTICE
When the System Main Control Valve
(B) is partially opened, the pressure on
the DV-5
a Diaphragm Chamber may
increase. This increase in pressure is
normal, and if the pressure is greater
than the valve trim maximum pressure
rating provided in the Technical Data
section, the pressure is to be relieved
to at least the valve trim pressure rating
by partially and temporarily opening the
Manual Control Station (M); however,
do not allow the pressure as indicated
on the Diaphragm Gauge (K) to drop
below the supply pressure shown on
the Water Supply Gauge (J), since this
action may result in tripping of the
DV-5
a Valve.
Step 11. Close the hinged cover of the
Manual Control Station (M), and insert a
new break rod in the small hole through
the top of the enclosing box.
Step 12. Fully open the System Main
Control Valve (B).
Step 13. After setting a fire protec-
tion system, notify the proper authori-
ties and advise those responsible for
monitoring proprietary and/or central
station alarms.
NOTICE
In order to prevent the possibility of a
subsequent operation of an overheated
solder type pilot sprinkler, any solder
type pilot sprinklers that were possibly
exposed to a temperature greater than
their maximum rated ambient must be
replaced.
Step 7. Operate (open) the Manual
Control Station (M) and then open
the Diaphragm Supply Valve (P). After
unaerated water ceases to discharge
from the Manual Control Station (M)
drain tube, slowly close the operating
lever by pushing it up. Do not close the
hinged cover at this time.
Step 8. After allowing water to flow out
of the Manual Reset Actuator (N) drain
tube until aerated water ceases to dis-
charge, reset the Manual Reset Actua-
tor (N) by pressing the Reset Knob and
hold until water stops flowing from its
drain tube and the pressure builds and
reaches approximately 15 psi (1,0 bar)
on the Diaphragm Gauge (K). Pressure
will then build up in the DV-5
a Dia-
phragm Chamber.
Note: After relieving trapped air, check the
Manual Reset Actuator (N) to make sure
there is no water draining from its drain tube.
If water is draining, reset the Manual Reset
Actuator (N) as previously instructed.
Step 9. Verify the ability for the DV-5a
Diaphragm to hold pressure as follows:
• With the diaphragm chamber pres-
surized per Step 8, temporarily close
the Diaphragm Supply Valve (P), and
then observe the Diaphragm Gauge
(K) for a drop in pressure.
• If a drop in pressure is noted, the
DV-5
a Diaphragm is to be replaced
and/or any leaks must be corrected
before proceeding to the next step.
Valve Setting
Procedure
Perform Steps 1 through 13 when ini-
tially setting the TYCO DV-5
a Valve,
after an operational test of the fire pro-
tection system, or after system opera-
tion due to a fire. Refer to Figures 16,
17, or 18, as applicable.
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),
System Drain Valve (E), and all auxil-
iary drains in the system. Close the
auxiliary drain valves and the System
Drain Valve (E) after water ceases to
discharge. Leave the Main Drain Valve
(D) open.
At this time make certain that the
Pressure Gauge Valves and the Alarm
Control Valve (H), as applicable, are
open.
Step 4. Depress the plunger of the
Automatic Drain Valve (F) to verify that
it is open.
Step 5. Clean the Diaphragm Supply
Strainer (Q) by removing the clean-
out plug and strainer basket. The Dia-
phragm Supply Strainer (Q) may be
flushed out by momentarily opening
the Diaphragm Supply Valve (P).
Step 6. Reset the automatic Elec-
tric Actuation by resetting the electric
detection system in accordance with
the manufacturer’s instructions to de-
energize the solenoid valve.
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