Tyco DN40 Manual page 12

Page 12 of 16
must be installed with smooth bends
that will not restrict flow.
Step 5. The main drain and drip funnel
drain may be interconnected provided
a check valve is located at least 12
inches (300 mm) below the drip funnel.
Step 6. Suitable provision must be
made for disposal of drain water.
Drainage water must be directed so
that it will not cause accidental dam-
age to property or danger to persons.
Step 7. Connect the Diaphragm
Chamber Supply Control Valve to the
inlet side of the system's main control
valve in order to facilitate setting of the
DV-5 Valve (Fig. 3).
Step 8. Unused pressure alarm
switch connections must be plugged.
Step 9. A suitable automatic supervi-
sory air (nitrogen) supply, as described
in the Technical Data Section, is to be
installed in accordance with the appli-
cable Technical Data Sheet. Refer to
Graph A for the system air pressure
requirements.
An air dryer, when specified, is to be
installed as required by the Authority
Having Jurisdiction.
Step 10. The Pressure Relief Valve
(P6 - Fig. 2A) is factory set to relieve at
a pressure of approximately 45 psi (3,1
bar), which can typically be used for a
maximum system pressure of 40 psi
(2,8 bar). The Pressure Relief Valve
may be reset; however, it must be reset
to relieve at a pressure that is in ac-
cordance with the requirements of the
Authority Having Jurisdiction.
To reset the Pressure Relief Valve, first
loosen the jam nut and then adjust the
cap accordingly — clockwise for a
higher pressure setting or counter-
clockwise for a lower pressure setting.
After verifying the desired pressure
setting, tighten the jam nut.
Step 11. The Low Pressure Alarm
Switch (Item P4 - Fig. 2A) is to be
adjusted to operate on falling pressure
at approximately 6 psi (0,4 bar) below
the minimum Double Interlock Dry
System air pressure requirement
shown on Graph B.
Use the instructions provided with the
switch to adjust the pressure setting.
Step 12. Conduit and electrical con-
nections are to be made in accordance
with the requirements of the authority
having jurisdiction and/or the National
Electric Code.
Step 13. Before a system hydrostatic
test is performed in accordance with
NFPA 13 system acceptance test re-
quirements, the DV-5 Diaphragm
Chamber is to be depressurized; the
Automatic Drain Valve (4, Fig. 2A) is to
be temporarily replaced with a 1/2 inch
NPT plug, the 3/32 inch Vent Fitting (17
- Fig. 2A) is to be temporarily replaced
with a 1/4 inch NPT plug, and the Dia-
phragm 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.
Valve Setting
Procedure
Steps 1 through 15 are to be per-
formed when initially setting the Model
DV-5 Deluge Valve; after an opera-
tional test of the fire protection system;
or, after system operation due to a fire.
Step 1. Close the Main Control Valve.
Step 2. Close the Diaphragm Cham-
ber Supply Control Valve and the Sys-
tem Air Supply Control Valve.
Step 3. Open the Main Drain Valve,
System Drain Valve, and all auxiliary
drains in the system. After water
ceases to discharge, close the System
Drain Valve and auxiliary drain valves.
Leave the Main Drain Valve open.
NOTE
Do not open the Inspector's Test Con-
nection and auxiliary drains if resetting
after a system test; otherwise, system
air pressure will be relieved unneces-
sarily.
Step 4. Depress the plunger of the
Automatic Drain Valve to verify that it
is open and that the DV-5 Valve is
completely drained.
Step 5. Clean the Strainer in the Dia-
phragm Chamber Supply connection
by removing the clean-out plug and
strainer basket. The Strainer may be
flushed out by momentarily opening
the Diaphragm Chamber Supply Con-
trol Valve.
Step 6. Inspect for and clear all ice
plugs where system piping has been
exposed to freezing conditions and
when there has been a flow of water
into the system.
Step 7. Replace all damaged or oper-
ated sprinklers. Replacement sprin-
klers must be of the same type and
temperature rating as those that oper-
ated.
NOTE
In order to prevent the possibility of a
subsequent operation of an over-
heated solder type sprinkler, any sol-
der type sprinklers possibly exposed
to a temperature greater than their
maximum rated ambient must also be
replaced.
Step 8. Service the air dryer, if appli-
cable, in accordance with the manu-
facturer's instructions.
Step 9. Open the System Air Supply
Control Valve and allow the system to
automatically re-establish its nominal
system air pressure per Graph A. Ob-
serve the Automatic Drain Valve for
leaks. If there are leaks, deter-
mine/correct the cause of the leakage
problem within the Riser Check Valve.
Step 10. Reset the actuation system.
Manual Actuation — Push the operat-
ing lever up; however, do not close the
hinged cover at this time.
Electric Actuation — Reset the electric
detection system in accordance with
the manufacturer's instructions to de-
energize the Solenoid Valve.
Step 11. Open the Diaphragm Cham-
ber Supply Control Valve and allow full
pressure to build up in the Diaphragm
Chamber.
Step 12. Operate (open) the Manual
Control Station to vent trapped air from
the Diaphragm Chamber. If necessary,
first open the hinged cover, and then
fully pull down on the operating lever.
SLOWLY close the operating lever, by
pushing it up, after aerated water
ceases to discharge from the Manual
Control Station drain tubing. Close the
hinged cover and insert a new break
rod in the small hole through the top of
the enclosing box.
Step 13. Inspect the drain connections
from the Manual Control Station and
the Dry Pilot Actuator. Any leaks must
be corrected before proceeding to the
next step.
Step 14. Verify the ability for the DV-5
Diaphragm to hold pressure as fol-
lows:
With the diaphragm chamber pressur-
ized per Step 12, temporarily close the
Diaphragm Chamber Supply Control
Valve and observe the Diaphragm
Chamber Pressure Gauge for a drop in
pressure.
If a drop in pressure is noted, the DV-5
Diaphragm is to be replaced and/or
any leaks must be corrected before
proceeding to the next step.
If the Diaphragm Chamber Pressure
Gauge does not indicate a drop in
pressure, re-open the Diaphragm
Chamber Supply Control Valve and
proceed to the next step.
Step 15. Slowly open the Main Control
Valve. Close the Main Drain Valve as
soon as water discharges from the
TFP1460