The drain tubing must be installed with smooth bends
that will not restrict flow.
The connection to the system piping must be located on
the supply side of the System Shut-off Valve (Fig. 1)
and at least two feet above the Model A Preaction
Valve, so that drain back/condensate will not flow into
the Accelerator piping.
Connections to a feed or cross main must be made
either to the side or top of the main.
After installing the S430 Accelerator, close the Accelera-
tor Control Valve.
NOTES
Failure to follow the above instructions can result in accidental
tripping of the Accelerator.
The Accelerator Control Valve must be closed during hydro-
static testing of the system to prevent internal damage to the
S430 Accelerator.
7. The Low Air Pressure Alarm Switch (7 - Fig. 6) is to be
adjusted to operate on falling pressure at approximately
6 psi (0.4 bar) below the minimum Double Interlock Dry
System air pressure requirement shown in Figure 5.
8. The Pressure Relief Valve (10 - Fig. 6) is factory set to
relieve at a pressure of approximately 45 psi (3.1 bar),
which can typically be used for a maximum system pres-
sure of 40 psi (2.8 bar). The Pressure Relief Valve may
be adjusted; however, it must be adjusted to relieve at a
pressure which is in accordance with the requirements
of the Authority Having Jurisdiction.
To adjust the Pressure Relief Valve, first loosen the jam
nut and then adjust the cap accordingly — clockwise for
a higher pressure setting or counterclockwise for a
lower pressure setting. After verifying the desired pres-
sure setting, tighten the jam nut.
9. Suitable provision must be made for disposal of drain
water. Drainage water must be directed such that it will
not cause damage or result in dangerous conditions.
10. All conduit and electrical connections are to be made in
accordance with the requirements of the Authority Hav-
ing Jurisdiction and/or the National Electrical Code.
STAR SPRINKLER INC.
2-4.1.10
Page 7
FIGURE 7
3 INCH (DN80) ELECTRIC/PNEUMATIC DOUBLE INTERLOCK PREACTION TRIM
SUB-ASSEMBLIES (#3008)
AIR SUPPLY
CONTROL VALVE
AUTOMATIC
DRAIN VALVE
CONTROL
STATION
MANUAL
PRESSURE
GAUGE
AIR SUPPLY
SYSTEM
PRESSURE
GAUGE
SUPPLY
WATER
CLOSED)
DRAIN VALVE
(NORMALLY
LOW BODY
CLOSED)
(NORMALLY
ACTUATOR
(NORMALLY
OPEN)
PRESSURE
GAUGE
DIFFERENTIAL
CHAMBER
PRIMING TRIM
FOR OPTIONAL
CONNECTION
1/2 INCH NPT
(SEE FIGURE 8)
ACCELERATOR TRIM
FOR OPTIONAL
TEST VALVE
ALARM
(NORMALLY
CLOSED)
PRESSURE
LOW AIR
ALARM
CONNECTIONS
1/2 INCH NPT
SWITCH
1/2 INCH NPT
CONNECTION
FOR SYSTEM
AIR SUPPLY
DRY PILOT
1/4"x10"
(REF.)
E
F
G
H
SYSTEM
ASSEMBLY "H"
AS SHOWN
INSTALL
(SEE FIGURE 9)
CLOSED)
(NORMALLY
DRAIN VALVE
MAIN
FUNNEL
DRIP
*
*
*
INCH NPT
TO DRAIN
1-1/2
INCH
NPT TO
1-1/4
15°
DRAIN
A
B
CONTROL VALVE
(NORMALLY
1/2 INCH NPT
FROM WATER
SUPPLY
DIFFERENTIAL
CHAMBER SUPPLY
OPEN)
C
MOTOR ALARM
FOR WATER
CONNECTION
3/4 INCH NPT
D
PRESSURE
WATERFLOW
ALARM SWITCH
*
*
NOTES:
1. SEE FIGURE 3 FOR PORT IDENTIFICATION.
PORT "07" MUST VENT TO ATMOSPHERE
2.
FOR PROPER VALVE OPERATION.
ASSEMBLE IN ALPHABETICAL ORDER.
3.
ROUTE ALL TUBING TO DRIP FUNNEL.
*
(SEE FIGURE 7)
PRIMING TRIM
FOR OPTIONAL
CONNECTION
1/2 INCH NPT
SEPARATELY
ORDERED
VALVE,
SOLENOID
CLOSED)
(NORMALLY
OBSOLETE
