Tyco DV-3 User Manual

Wet Pilot
Actuation
The Wet Pilot Actuation Trim provides
for connection of a detection system
consisting of pilot sprinklers (heat de-
tectors) and manual control stations
interconnected with minimum 1/2 inch
(DN15) Schedule 40 steel pipe. The
pilot line is connected to the “Wet Pilot
Detection” connection shown in Fig-
ures 4 and 12. Nominal installation di-
mensions for the Wet Pilot Actuation
Trim are shown in Figure 4.
Pilot sprinklers are to be minimum 5.6
K-factor orifice listed or approved
automatic sprinklers. Manual Control
Stations are to be the Model MC-1
described in Technical Data Sheet
TD1382.
The maximum height of a wet pilot line
above the DV-3 Valve must not exceed
the limitations given in Graph B as a
function of the minimum water supply
pressure to the DV-3 Valve and the
length of the pilot line to the most re-
mote pilot sprinkler.
Provision must be made for installing
a 5.6 K-factor orifice, Inspector’s Test
Connection at the most hydraulically
demanding location of a wet pilot line
(usually adjacent to the highest and
most remote wet pilot sprinkler or man-
ual control station).
Operation of a pilot sprinkler or open-
ing of a manual control station results
in a rapid pressure drop in the Dia-
phragm Chamber of the DV-3 Valve,
and the force differential holding the
Center Valve Assembly down in the
set position is reduced to below the
valve trip point.
NOTES
Wet Pilot Lines must be maintained at
a minimum temperature of 40°F/4°C.
It is recommended that internally gal-
vanized pipe and cast iron fittings be
used for wet pilot lines.
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TFP1350
FIGURE 2
SYSTEM SCHEMATIC — WET PILOT ACTUATION
CONNECTION
SUPPLY
SYSTEM PIPIN
G
WITH
O
PEN N
O
ZZLES
O
R SPRINKLERS - N
O
RMALLY DRY
RESTRICTION
DRAIN VALVE
(NORMALLY
(MINIMUM 1/2" PIPE AND
AUTOMATIC SPRINKLERS)
WET PILOT SPRINKLER
DETECTION SYSTEM
WET PILOT LINE)
DEMANDING LOCATION OF THE
(AT THE MOST HYDRAULICALLY
INSPECTOR'S TEST CONNECTION
PRESSURE
S
U
PPLY
WATER
DRAIN
ALARM SWITCH
WATER SUPPLY
CONTROL VALVE
PRESSURE
OPEN)
GAUGE
(NORMALLY
MAIN
DRAIN
GAUGE
PRESSURE
CHAMBER
DIAPHRAGM
SPECIFIED)
STATION
CONTROL
MANUAL
REMOTE
(WHEN
WATERFLOW
DRAIN
DRAIN
STATION
MANUAL
CONTROL
LOCAL
CLOSED)
MAIN
DIAPHRAGM
CHAMBER
DIAPHRAGM
(NORMALLY OPEN)
CONTROL VALVE
CHAMBER SUPPLY
VALVE
DELUGE
OBSOLETE

Tyco DV-3 Specifications

General

Brand	Tyco
Model	DV-3
Category	Control Unit
Language	English