Johnson Controls Tyco DV-5a Series Manual page 23

Valve Setting
Procedure
Perform Steps 1 through 16 when ini-
tially setting the TYCO DV-5
after an operational test of the fire pro-
tection system, or after system opera-
tion due to a fire. Refer to Figure 16, 17,
or 18, as applicable.
Step 1. Close the System Main Control
Valve (B).
Step 2. Close the Diaphragm Supply
Valve (P). For Dry Pilot Actuation, close
the Dry Pilot Air Supply Valve (W).
Step 3. Close the Supervisory Air
Supply Valve (R).
Step 4. 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 5. Depress the plunger of the
Automatic Drain Valve (F) to verify that
it is open.
Step 6. 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 7. Replace any operated sprin-
klers on the system piping, as
applicable.
Step 8. Reset the automatic actuation
system.
• Wet Pilot Actuation — Replace oper-
ated pilot sprinklers and/or reset the
remote Manual Control Stations.
• Dry Pilot Actuation — Replace oper-
ated pilot sprinklers and/or reset the
remote Manual Control Stations.
Reestablish dry pilot pneumatic
pressure.
• Electric Actuation — Reset the elec-
tric detection system in accordance
with the manufacturer's instructions
to de-energize the solenoid valve.
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
Valve,
exposed to a temperature greater than
a
their maximum rated ambient must be
replaced.
Step 9. 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 10. After allowing water to flow
out of the Manual Reset Actuator (N)
drain tube until aerated water ceases
to discharge, reset the Manual Reset
Actuator (N) by pressing the Reset
Knob and hold until the pressure builds
and reaches approximately 15 psi (1,0
bar) on the Diaphragm Gauge (K) and
water stops flowing from its drain tube.
Pressure will then build up in the DV-5
Diaphragm Chamber.
For Wet Pilot Actuation, crack open
the Inspector's Test Connection and
any other vent valves on the wet pilot
line to relieve trapped air. After the dis-
charge of air has stopped, close the
vent valves and the Inspector's Test
Connection.
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 pre-
viously instructed.
Step 11. Verify the ability for the DV-5
Diaphragm to hold pressure as follows:
• With the
pressurized per Step 10, tempo-
rarily 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 Diaphragm is to be replaced
a
and/or any leaks must be corrected
before proceeding to the next step.
• If the Diaphragm
indicates no drop in pressure,
re-open the Diaphragm Supply
Valve (P) and proceed to the next
step.
a
a
diaphragm chamber
Gauge (K)
Page 23 of 34
Step 12. Open the Supervisory Air
Supply Valve (R) to reestablish super-
visory system air pressure at nominally
10 psi (0,68 bar).
Step 13. 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 Diaphragm Chamber may
a
increase. This increase in pressure is
normal, and if the pressure is greater
than 300 psi (20,7 bar), the pressure
is to be relieved by partially and tem-
porarily opening the Manual Control
Station (M); however, do not allow
the pressure as indicated on the Dia-
phragm 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
Step 14. 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 15. Fully open the System Main
Control Valve (B).
Step 16. After setting a fire protec-
tion system, notify the proper authori-
ties and advise those responsible for
monitoring proprietary and/or central
station alarms.
TFP1425
Valve.
a