Appendix A of TFP1338 (06/2007)
Summary Instructions (If problems occur, consult full document)
Deluge Valve, DV-5, DN40 thru DN200, Wet Pilot Actuation
Q
B
1
P
C
G
2
H
F
J
A
E
L
1 Diaphragm Supply Connection
3
2
Wet Pilot Line Connection
Water Motor Alarm Connection
C
N
3
K
M
N
P
Q
L
M
K
F
J
H
G
E
D
Item
A
B
Waterflow Switch
Diaphragm Supply Valve
Manual Control Station
Diaphragm Supply Strainer
Automatic Shut-Off Valve
Diaphragm Gauge
System Gauge
Automatic Drain Valve
Water Supply Gauge
Alarm Control Valve
Alarm Test Valve
System Drain Valve
(Not used)
DV-5 Valve
Description
Stop Valve
I. Normal conditions:
The Stop Valve (B) is opened and
locked.
• The System Drain Valve (E) is
closed.
• The Diaphragm Supply Valve (P) and
Alarm Control Valve (H) are open.
• The Manual Control Station (M) and
Alarm Test Valve (G) are closed.
• Water Supply Gauge (J) reads the
upstream water pressure.
• The System Gauge (L) reads zero.
• The Diaphragm Gauge (K) is equal
to or greater than the Water Supply
Gauge (J).
II. Operation
When set for service, the DV-5 Dia-
phragm Chamber is pressurized from
the inlet side of the Stop Valve (B).
Opening of the Manual Control Sta-
tion (M) or a Wet Pilot Sprinkler (fire
detection) releases water from the Di-
aphragm Chamber faster than it can
be replenished through the Automat-
ic Shut-Off Valve (N). The water sup-
ply pressure then forces the DV-5 Dia-
phragm open permitting water to flow
into the system piping, as well as to
the Waterflow Switch (C).
III. Removing system from service:
Step 1. Close the Diaphragm Supply
Valve (P).
Step 2. Close the Stop Valve (B).
Step 3. Open the Alarm Test Valve (G)
and System Drain Valve (E).
IV. Placing the system back in
service:
Step 1. Close the Stop Valve (B).
Step 2. Close the Diaphragm Supply
Valve (P).
Step 3. Open the Alarm Test Valve (G),
System Drain Valve (E), and all auxilia-
ry drains in the system. Close the aux-
iliary drain valves after water ceases to
discharge. Leave the Alarm Test Valve
(G) and System Drain Valve (E) open.
Step 4. Depress the plunger of the Au-
tomatic Drain Valve (F) to verify that
it is open and that the DV-5 Valve is
completely drained.
Step 5. Clean the Diaphragm Supply
Strainer (Q).
Step 6. Reset the actuation system.
Manual Actuation — Push the operat-
ing lever up; however, do not close the
hinged cover at this time.
Wet Pilot Actuation — Replace operat-
ed pilot sprinklers and/or reset the re-
mote manual control stations.
Step 7. Open the Diaphragm Supply
Valve (P) to pressurize the DV-5 Dia-
phragm Chamber.
Step 8. Open and then close the
Manual Control Station (M) to vent
trapped air from the DV-5 Diaphragm
Chamber.
Relieve trapped air from the wet pi-
lot line. After the discharge of air has
stopped, close the vent valves and the
Inspector’s Test Connection.
Step 9. Temporarily close the Dia-
phragm Supply Valve (P), and then ob-
serve the Diaphragm Gauge (K) for a
drop in pressure.
If the Diaphragm Chamber Pressure
Gauge (K) indicates no drop in pres-
sure, re-open the Diaphragm Sup-
ply Valve (P) and proceed to the next
step.
Step 10. Partially open the Stop Valve
(B). Close the Alarm Test Valve (G) and
then close the System Drain Valve (E)
after water ceases to drain. Observe
the Automatic Drain Valve (F) for leaks.
If there are no leaks, the DV-5 Valve is
ready to be placed in service and the
Stop Valve must then be fully opened.
V. Weekly test:
Important: Prior to closing any valves
or activating any alarms, notify local
security guards and the central alarm
station if applicable.
Step 1. Open the Alarm Test Valve (G),
verify that the alarm signal created by
the Waterflow Switch (C) is visible at
the fire panel. If applicable, check the
sound of the water motor alarm — it
must be clear and steady.
Step 2. Return the Alarm Test Valve
(G) to the normally closed position af-
ter verifying that the alarm signal is vis-
ible at the fire panel.
Step 3. Drain the alarm line by squeez-
ing the Automatic Drain Valve (F). If the
supply is below the normal, use the in-
structions from the water supply to ob-
tain the usual pressure.
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