Appendix A of TFP1484 (08/2018)
Summary Instructions (if problems occur, consult full document)
EN12845 Compliance DV-5 Preaction Type A Valve, DN40 thru DN200
I. Normal Conditions
• The Main Control Valve is open and
locked.
• The Diaphragm Chamber Supply
Valve (Q) is open.
• The Air Supply Control Valve (Y) is
open.
• The Alarm Test Valve (G) and Drain
Valves (E, P, and X) are closed.
• The Alarm Control Valve (2) is nor-
mally open.
• The Pneumatic Actuation Loop Drain
Valve (P) is closed.
• The Pressure Gauge Valves are open:
— Pressure gauge (H) reads the sys-
tem water supply pressure.
— Pressure gauge (J) reads the sys-
tem air supply pressure.
— Pressure gauge (K) reads the dia-
phragm chamber pressure.
II. Operation
When set for service, the TYCO DV-5
Preaction Type A Valve (A) utilizes au-
tomatic sprinklers and a supplemen-
tal detection system. The supple-
mental detection system is typically
comprised of 24 VDC heat detectors,
smoke detectors, and manual pull sta-
tions. Actuation of the detection sys-
tem automatically operates (releases)
the DV-5 Deluge Valve, allowing water
to ow into the sprinkler piping system
and to be discharged from any sprin-
klers that may be open.
At the same time, the Model FSV-1 Fail-
Safe Valve (T) pilot chamber is pressur-
ized, opening the Model FSV-1 Valve
(T). Make-up pressure to the diaphragm
chamber of the DV-5 Valve cannot oc-
cur. The main waterway is now open
and water now enters into the system
piping.
In case of an emergency, the valve can
be operated manually by opening the
Manual Control Station (M).
In case of a power cut, the Solenoid
Valve (N) will open. As soon as a sprin-
kler operates/activates, air pressure will
drop, opening the Dry Pilot Actuator (S).
Water from the diaphragm pressure
piping will leave the Dry Pilot Actuator
through this drain, resulting in the ac-
tivation of the DV-5 Deluge Valve (A).
III. Removing System from Service
Step 1. Close the Main Control Valve
and close the Water Motor Alarm
Control Valve (2).
Step 2. Close the Diaphragm Chamber
Supply Valve (Q).
Step 3. Close the Air Supply Control
Valve (Y).
Step 4. Drain the system with drain
valves E, P, and X. Open all other valves
in the system to make sure that cross-
mains and branchlines are vented and
drained.
IV. Returning System to Service
Step 1. Replace operated/damaged
sprinklers and/or reset the manual
control station.
Step 2. Close System Drain Valve (E).
Step 3. Clean the Diaphragm Supply
Strainer (R) and the strainer in the
pneumatic actuation loop.
Step 4. Reset the actuation system:
Manual Actuation — Push the operat-
ing lever of the Manual Control Station
(M) up. However, do not close the
hinged cover at this time.
Electric Actuation — Reset the electric
detection system to de-energize the
Solenoid Valve (F).
Step 5. Open the Diaphragm Chamber
Supply Valve (Q) to pressurize the DV-5
diaphragm chamber.
Step 6. Open and then close the
Manual Control Station (M) to vent
trapped air from the DV-5 diaphragm
chamber.
Step 7. Close Dry Pilot Drain Valve (P).
Step 8. Reset the air pressure in the
sprinkler system by opening the Air
Supply Control Valve (Y).
Step 9. Slowly open the Main Control
Valve. Close all Drain Valves (E, P, and
X).
Step 10. Observe for leaks. If there
are no leaks, the DV-5 Deluge Valve is
ready to place in service.
Step 11. Reset fire alarm panel and
notify central alarm station.
V. Weekly Test
Note: Prior to closing any valves or
activating any alarms, notify local security
guards and the central alarm station, if
applicable.
Step 1. Check self-closing Drain Valve
(V) for leaks.
Step 2. 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 that
the sound of the Water Motor Alarm is
clear and steady. Close the Alarm Test
Valve (G).
Step 3. Drain the alarm line by pushing
the self-closing Drain Valve (V). If the
supply pressure is below the normal,
use the instructions from the water
supply to obtain the usual pressure.
G
B
A
W
D
R
Q
H
T
E
J
P
M
S
K
L
U
X
V
N
C
F
Y
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