TFP1466
Page 15 of 18
Electric/Electric Actuation
System Operation Procedure
Proper operation of the DV-5
a
Valve for
both opening of the DV-5
a
Valve in a
fire condition, or not opening the DV-5
a
Valve in a non-fire condition, must be
verified as follows:
Step 1.
Close the System Main Control
Valve (B) and then open the Main Drain
Valve (D).
Step 2.
Manually operate Zone 1 of
the Releasing Panel, and verify the
following:
• The operation of the Releasing Panel
and its associated alarms
• That there is no leakage from the
Solenoid Valve (V)
NOTE:
During this procedure, the Solenoid
Valve (V) should remain closed and the
DV-5
a
Deluge Valve Diaphragm Chamber
should remain pressurized.
This procedure is used to verify that the
DV-5
a
Deluge Valve will remain set if the
electric detection system (Zone 1) operates
but the sprinkler system (Zone 2) remains
in its normally pressurized condition.
Step 3.
Restore the electric fire detec-
tion system to a normal condition in
accordance with the manufacturer’s
instructions.
Step 4.
Open the Inspector’s Test Con-
nection to relieve system air pressure,
and verify the following:
• That the Low Air Pressure Alarm
Switch (U) and Zone 2 of the Releas-
ing Panel, as well as its associated
alarms, operate properly. The Low
Air Pressure Alarm Switch (U) should
operate at the previously established
pressure (see Installation section,
Step 9).
• That there is no leakage from the
Solenoid Valve (V).
Step 5.
Close the Inspector’s Test
Connection.
NOTE:
During this procedure, the Solenoid
Valve (V) should remain closed and the
DV-5
a
Valve Diaphragm Chamber should
remain pressurized.
This procedure is used to verify that the
DV-5
a
Valve will remain set if the Low
Air Pressure Alarm Switch (U) (Zone 2)
operates due to loss of system air pressure
and the electric detection system (Zone 1)
remains in a normal condition.
Step 6.
Restore the electric fire detec-
tion system to a normal condition in
accordance with the manufacturer’s
instructions after the system air pres-
sure has automatically been restored
to normal.
Step 7.
Close the System Shut-Off
Valve (W) after the system air pressure
has been restored to normal.
Step 8.
Open the System Main Control
Valve (B) one turn beyond the position
at which water just begins to flow from
the Main Drain Valve (D).
Step 9.
Close the Main Drain Valve (D).
Step 10.
Close the Air Supply Valve (S).
Step 11.
Manually operate Zone 1 of
the Releasing Panel, and then operate
Zone 2 of the Releasing Panel by par-
tially opening the System Drain Valve
(E) to relieve air pressure at the Low Air
Pressure Alarm Switch (U), and verify
the following:
• That the DV-5
a
Valve operates as is
indicated by a discharge of water
from the System Drain Valve (E) and
the Automatic Drain Valve (F). The
Automatic Drain Valve (F) may or may
not close depending on the flow past
the partially open System Main Con-
trol Valve (B)
• That the Model MRA-1 Manual Reset
Actuator (N) has operated as is indi-
cated by water discharging into the
Drip Funnel from the 1/2 in. drain
tube connected to the Model MRA-1
Manual Reset Actuator (N)
• That the Waterflow Pressure Switch
(C) and its associated alarms prop-
erly operate
• That the Water Motor Alarm, if appli-
cable, properly operates
NOTE:
This procedure simulates automatic
system operation upon both electric
detection and loss of system air pressure.
Internal Valve Inspection
Once every five years during the annual
operational test procedure and prior
to the DV-5
a
Valve being reset and
with the DV-5
a
Valve de-pressurized,
the interior of the DV-5
a
Valve must
be cleaned and inspected for wear
and damage. Damaged or worn parts
must be replaced. (Replacement of the
Diaphragm every ten years is recom-
mended, or more frequently if inspec-
tions and/or wear and tear warrant
more frequent replacement.)
NOTICE
The Diaphragm Cover may be removed
between Steps 4 and 5 of the reset-
ting instructions, since at that point the
DV-5
a
Valve should be de-pressurized
as evident by a zero gauge reading on
the Diaphragm Gauge (K) and Water
Supply Gauge (J), as well as no water
discharging from the Automatic Drain
Valve (F).
To perform internal valve inspection
between Steps 4 and 5 of the Valve
Setting Procedure remove the Dia-
phragm cover as follows:
Step 1.
Close the Inverted Flare Shut-
Off Valve (R).
Step 2.
Remove the Copper Tube
Fitting between the Diaphragm Supply
Valve (P) and the Inverted Flare Shut-
Off Valve (R).
Step 3.
Loosen the union securing the
Electric/Electric Actuation Trim and
remove the Electric/Electric Actuation
Trim.
Step 4.
Loosen and remove the union
between the Diaphragm Cover and the
MRA-1 Manual Reset Actuator (N) and
remove the MRA-1 Manual Reset Actu-
ator (N) subassembly.
Step 5.
Remove the Diaphragm Valve
Cover hardware, then slowly remove
the Diaphragm Cover and perform
internal valve inspection. Clean the
valve interior and replace parts as
necessary.
After cleaning and inspecting valve
interior, and replacing parts as nec-
essary, reinstall the Diaphragm Cover
by completing the following steps to
assure the Diaphragm Cover Fasteners
are uniformly and securely tightened.
Step 1.
With reference to Figure 1,
ensure that the Diaphragm is properly
oriented and that the proper hardware
arrangement is utilized when assem-
bling the Diaphragm Covers. The hard-
ware arrangements differ depending on
the size of the DV-5
a
Valve.
Step 2.
By first using the Long Hex
Bolts, support of the Diaphragm Cover
will be provided before installing the
Short Hex Bolts. Align Diaphragm in
proper orientation with Valve Body, and
then align Diaphragm Cover in proper
orientation with Valve Body. Hand-
tighten all fasteners.
Step 3.
Using crossdraw sequence
to assure uniformity, wrench-tighten
Long Hex Bolts and Short Hex Bolts
to appropriate torque values. Repeat
crossdraw sequence two to three
times at incremental torque valves
until reaching the torque valves found
in Table B.
Step 4.
Inspect to assure all Hex Bolts
are securely tightened.
Step 5.
Using the union, secure the
MRA-1 Manual Reset Actuator (N) to
the Diaphragm Cover.
Step 6.
Using the union, secure the
Electric/Electric Actuation Trim.
Step 7.
Replace the Copper Tube
Fitting between the Diaphragm Supply
Valve (P) and the Inverted Flare Shut-
Off Valve (R).
