TFP1316
Page 6 of 18
• Low pressure alarm setting at
approximately 6 psi (0,4 bar) below
the minimum pilot line service pres-
sure requirement shown in Graph B
• Fire alarm setting at approximately
15 psi (1,0 bar) below the minimum
pilot line service pressure require-
ment shown in Graph B
The Pressure Relief Valve provided
in the trim is factory set to relieve
at a pressure of approximately
45 psi (3,1 bar); however, it may be
field adjusted to a lower pressure, if
required.
The dry pilot line is to be provided with
low point drains to enable draining of
condensate.
Note:
At a minimum, it is recommended that
internally galvanized pipe and cast iron fit-
tings be used for dry pilot lines.
Installation
The TYCO DV-5
a
Automatic Water
Control Valve Dry Pilot Actuation is to
be installed in accordance with this
section.
NOTICE
DV-5A Automatic Water Control Valves
are designed to be used in freshwater
systems. When the supply is from an
alternative source such as brackish
water, saltwater, or contains additives
such as foam, the limited warranty is
reduced to one year from the time of
installation. An increase in frequency of
inspections is required when the valve
is exposed to such supplies and other
corrosive conditions or chemicals that
could impact valve materials or the
operation of the assembly. The system
and all components must be designed
accordingly for the increased demand.
It is required to thoroughly flush the
valve and trim assembly with freshwa-
ter and reset to the set condition after
each operation.
Proper operation of the DV-5
a
Valves
depends upon their trim being installed
in accordance with the instructions
given in this technical data sheet.
Failure to follow the appropriate trim
diagram may prevent the DV-5
a
Valve
from functioning properly, as well as
void approvals and the manufacturer’s
warranties.
The DV-5
a
Automatic Water Control
Valve Dry Pilot must be installed in a
readily visible and accessible location.
Heat tracing of the DV-5
a
Valve or its
associated trim is not permitted. Heat
tracing can result in the formation of
hardened mineral deposits that are
capable of preventing proper operation.
Always open the system control valves
slowly to avoid a sudden rush of water
entering the system.
The DV-5
a
Valve is to be installed in
accordance with the following criteria:
Step 1.
All nipples, fittings, and devices
must be clean and free of scale and
burrs before installation. Use pipe
thread sealant sparingly on male pipe
threads only.
FIGURE 4
DV-5
a
VALVE
DELUGE DRY PILOT 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 SUPPLY SHUT-OFF
(NORMALLY OPEN)
DIAPHRAGM
CHAMBER SUPPLY
CONTROL VALVE
(NORMALLY OPEN)
DIAPHRAGM CHAMBER
SUPPLY CONNECTION
WATER
SUPPLY
DRAIN
DIAPHRAGM CHAMBER
PRESSURE GAUGE
AUTOMATIC
AIR/NITROGEN
MAINTENANCE
DEVICE
DRAIN
WATER SUPPLY
PRESSURE
GAUGE
MANUAL RESET
ACTUATOR
RESTRICTION
DRAIN
DRAIN
DRAIN
WATERFLOW
PRESSURE
ALARM
SWITCH
DRY PILOT SPRINKLER
DETECTION SYSTEM
(MINIMUM 1/2" PIPE AND
AUTOMATIC SPRINKLERS)
LOW
PRESSURE
ALARM
SWITCH
DRY PILOT
ACTUATOR
REMOTE
MANUAL
CONTROL
STATION
(WHEN
SPECIFIED)
DRAIN
DRAIN
DV-5A
VALVE
INSPECTOR'S
TEST CONNECTION
(AT MOST REMOTE
LOCATION FROM
DV-5A VALVE)
