Johnson Controls tyco DV-5A Manual page 12

TFP1416
Page 12 of 18
Step 18. Before a system hydrostatic
test is performed, the DV-5
Chamber is to be depressurized, the
Automatic Drain Valve is to be tem-
porarily replaced with a plug, and the
Diaphragm Cover Bolts must be uni-
formly and securely tightened using
a cross-draw sequence. After tight-
ening, double-check to make certain
that all of the Diaphragm Cover Bolts
are securely tightened. See Table B in
the Care and Maintenance section for
torque specifications.
Note: When installing dry pilot actuation,
the system will require two automatic air
supplies as described in Steps 9 and 14.
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. See Figure 8.
Step 1. Close the System Main Control
Valve (B).
Step 2. Close the Diaphragm Supply
Valve (P) and 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
Diaphragm system. Replace operated pilot sprin-
a
klers and/or reset the remote Manual
Control Stations. Reestablish dry pilot
pneumatic pressure.
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 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.
Valve,
a
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 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 Diaphragm Chamber.
a
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 11. Verify the ability for the DV-5
Diaphragm to hold pressure as follows:
• With
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
a
and/or any leaks must be corrected
before proceeding to the next step.
• If the
indicates no drop in pressure,
re-open the Diaphragm Supply
Valve (P) and proceed to the next
step.
the diaphragm chamber
Diaphragm is to be replaced
Diaphragm Gauge
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 temporar-
ily 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 Valve.
a
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
a
monitoring proprietary and/or central
station alarms.
(K)