TFP1321
Page 6 of 18
Electric
Actuation
The Electric Actuation Trim forms a part
of the laboratory approval of the DV-5
a
Valves and is necessary for their proper
operation.
The Electric Actuation Trim is required
for electric operation of the DV-5
a Valve
by a detection system consisting of
electrical devices such as heat sen-
sitive thermostats, smoke detectors,
and/or electric manual pull stations as
shown in Figure 4.
Dimensions are provided in Figure 15.
Note: The normally closed, de-energized,
Solenoid Valve is separately ordered and
selected based on the required laboratory
approval acceptable to the authority having
jurisdiction. Refer to Technical Data Sheet
TFP2180 for specific laboratory approvals.
Consult with the applicable standards
of the Approval agency regarding
installation criteria pertaining to elec-
tric actuation circuitry.
Due to the functionality of the Model
MRA-1 Manual Reset Actuator, the
release circuit of the releasing panel
need only provide the typical ten
minutes of alarm condition intended
to energize the Solenoid Valve to
open. After the ten minute duration, at
which point should the Solenoid Valve
become de-energized and close (espe-
cially while operating under battery
back-up), the MRA-1 will have already
automatically opened, thereby pre-
venting the DV-5
a Diaphragm Chamber
from becoming re-pressurized, and
preventing an inadvertent closing of
the DV-5
a during a fire event.
FIGURE 4
DV-5
a VALVE
DELUGE ELECTRIC ACTUATION SCHEMATIC DIAGRAM
SYSTEM PIPING WITH OPEN NOZZLES OR SPRINKLERS - NORMALLY DRY
SYSTEM DRAIN VALVE
(NORMALLY CLOSED)
MAIN
DRAIN VALVE
(NORMALLY
CLOSED)
LOCAL
MANUAL
CONTROL
STATION
MAIN
CONTROL VALVE
(NORMALLY
OPEN)
WATER
DIAPHRAGM CHAMBER
PRESSURE GAUGE
WATER SUPPLY
PRESSURE
GAUGE
MANUAL RESET
ACTUATOR
WATERFLOW
PRESSURE
ALARM
SWITCH
RESTRICTION
DRAIN
DRAIN
DRAIN
DRAIN
DRAIN
SOLENOID
VALVE
(TYPICALLY
24 VOLTS DC)
ELECTRIC DETECTION SYSTEM
(TYPICALLY 24 VOLTS DC)
HEAT DETECTORS, SMOKE DETECTORS,
MANUAL PULL STATIONS, ETC.
DELUGE VALVE
RELEASING PANEL
(AUTOMATIC
CONTROL UNIT
WITH BATTERY
BACK-UP)
POWER
SUPPLY
(TYPICALLY
120 VOLTS AC)
DV-5A
VALVE
WATER SUPPLY SHUT-OFF
DIAPHRAGM
CHAMBER SUPPLY
CONTROL VALVE
(NORMALLY OPEN)
DIAPHRAGM CHAMBER