Johnson Controls Tyco DV-5a Series Manual page 8

TFP1425
Page 8 of 34
SYSTEM PIPING WITH AUTOMATIC SPRINKLERS - NORMALLY DRY
HEAT DETECTORS, SMOKE DETECTORS,
DELUGE VALVE
RELEASING PANEL
(AUTOMATIC
CONTROL UNIT
WITH BATTERY
BACK-UP)
POWER
AUTOMATIC
SUPPLY
SUPERVISORY
(TYPICALLY
AIR/NITROGEN
120 VOLTS AC)
8 TO 12 PSI
SUPERVISORY
LOW PRESSURE
ALARM SWITCH
CHAMBER SUPPLY
SYSTEM AIR
PRESSURE
(NORMALLY OPEN)
GAUGE
DV-5 VALVE - SINGLE INTERLOCK PREACTION ELECTRIC PILOT ACTUATION SCHEMATIC DIAGRAM
a
Electric
Actuation
The Electric Actuation Trim forms a part
of the laboratory approval of the DV-5
Valves and is necessary for their proper
operation.
The Electric Actuation Trim is required
for electric operation of the DV-5
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 6.
NOTE: For Single Interlock Preaction
Systems with Electric Actuation, the
system designer typically selects elec-
tric detection devices that will operate
sooner than the automatic sprinklers
chosen for use on the sprinkler piping.
ELECTRIC DETECTION SYSTEM
(TYPICALLY 24 VOLTS DC)
MANUAL PULL STATIONS, ETC.
SUPPLY
DIAPHRAGM CHAMBER
PRESSURE GAUGE
RESTRICTION
MANUAL RESET
DIAPHRAGM
CONTROL VALVE
DIAPHRAGM CHAMBER
SUPPLY CONNECTION
Dimensions are provided in Figure 15.
NOTES: The normally closed, de-
energized, Solenoid Valve is separately
ordered and selected based on the
required laboratory approval accept-
able to the authority having jurisdiction.
a
Refer to Technical Data Sheet TFP2180
for specific laboratory approvals.
Consult with the applicable standards
Valve of the Approval agency regarding
a
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
WATERFLOW
DV-5A
PRESSURE
VALVE
ALARM
SWITCH
DRAIN
WATER SUPPLY
PRESSURE
ACTUATOR
GAUGE
FIGURE 6
SOLENOID
VALVE
(TYPICALLY
24 VOLTS DC)
SYSTEM DRAIN VALVE
DRAIN
(NORMALLY CLOSED)
MAIN
DRAIN VALVE
(NORMALLY
DRAIN
CLOSED)
LOCAL
MANUAL
DRAIN
CONTROL
STATION
MAIN
CONTROL VALVE
(NORMALLY
WATER
OPEN)
SUPPLY
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 Diaphragm Chamber
a
from becoming re-pressurized, and
preventing an inadvertent closing of
the DV-5 during a fire event.
a
DRAIN