Star S460 User manual

Automatic
Air Maintenance Device,
Pressure Reducing Type
Model S460
GENERAL DESCRIPTION
The Star Model S460 Automatic Air Maintenance Device
is an automatic, field-adjustable device of the pressure re-
ducing type. It is used to control the pressure in a dry
pipe sprinkler system, preaction system, or dry pilot line
system of a dry pilot actuated deluge or preaction valve.
The S460 is utilized in applications where there is a com-
pressed air (or nitrogen) source which is controlled at a
higher pressure than the desired system pressure.Pres-
sure sources include plant air supplies having their own
automatic compressor controls, or nitrogen supplies hav-
ing single-stage cylinder mounted pressure regulators.
WARNING
The Model S460 Automatic Air Maintenance Device de-
scribed herein must be installed and maintained in compli-
ance with this document, as well as with the applicable
standards of the National Fire Protection Association, in
addition to the standards of any other authorities having
jurisdiction. Failure to do so may impair the integrity of
this device.
The owner is responsible for maintaining his fire protec-
tion system and devices in proper operating condition.
The installing contractor or sprinkler manufacturer should
be contacted relative to any questions.
TECHNICAL DATA
Approvals
UL and ULC Listed.FM Approved.
Maximum Inlet Air (or Nitrogen) Supply Pressure
200 psi (13.8 bar)
Field Adjustable Outlet Pressure Range
5 to 60 psi (0.4 to 4.1 bar)
Factory Set Outlet Pressure
35 psi (2.4 bar)
Assembly
Major components illustrated in Figure 1 are factory as-
sembled with black steel nipples and malleable iron pipe
fittings.
OPERATION
The Bypass Valve in the S460 is opened to fast fill the
system during the initial pressurization.Once the required
system pressure has been reached, the Bypass Valve is
closed and the Air Supply Control Valve is left open to
place the S460 in automatic operation.
If there is a slight leak in the system, the Pressure Regu-
lator will automatically maintain system pressure at the
preset level. The 1/8 inch (3.2 mm) orifice in the Restric-
tor Check Valve limits the flow of air from the Pressure
Regulator into the system to a value which is significantly
less than that which will be exhausted by the operation of
a 5.6 K-Factor sprinkler.
INSTALLATION
The Model S460 Automatic Air Maintenance Device must
be installed in accordance with the following instructions:
A. Connections between the inlet air supply and the S460,
as well as between the S460 and the system to be pres-
surized, are to be a minimum of 1/2 inch (DN15) pipe
size.
B. A 1/2 inch (DN15), non-spring loaded, rubber faced,
swing type check valve (#460491004) must be located
between the S460 and the system to be pressurized. A
check valve of this type is provided in the air supply trim
of Star dry pipe valves, preaction valves, and dry pilot
trim.
NOTE
Suitable consideration must be given to the removal of ex-
cessive moisture from the compressed air supply.
414-570-5000 • 800-558-5236 • FAX [phone]
2-5.3.11
STAR SPRINKLER INC.
www.starsprinkler.com
#1612
OBSOLETE

SETTING PROCEDURE
The Model S460 Automatic Air Maintenance Device must
be set in accordance with the following instructions:
1. Determine the pressure that meets the minimum require-
ments of the system to be pressurized.
.2. If the required pressure is higher or lower than 35 psi
(2.4 bar) then proceed with Step 3. If the required pres-
sure is 35 psi (2.4 bar) then proceed with Step 9.
3. Close the control valve in the air supply trim of the sys-
tem to be pressured.
4. Remove the system pressure gauge from its connection
and install it in the side gauge port on the pressure regu-
lator.
5. Open the Air Supply Control Valve in the S460.
6. Adjust the output pressure of the Pressure Regulator.
Turn the adjusting stem clockwise, as viewed from the
stem end of the Pressure Regulator, to increase pres-
sure and counter-clockwise to decrease pressure. One-
half turn of the stem will change the outlet pressure by
approximately 5 psi (0.4 bar).
7. Close the Air Supply Control Valve in the S460.
8. Return the system air pressure gauge to its normal loca-
tion. Re-install the 1/4 inch pipe plug in the gauge port of
the Pressure Regulator. Apply pipe thread sealant spar-
ingly to the plug threads only.
9. Open the control valve in the air supply trim to the sys-
tem being pressurized.
10. Open the Air Supply Control Valve in the S460.
11. Open the Bypass Valve in the S460.
12. Close the Bypass Valve after the system has been pres-
surized to approximately 5 psi (0.4 bar) less than the
minimum required system pressure determined in Step
1.
13. After the system pressure has stabilized, note the value
and compare with the requirement. Readjust the Pres-
sure Regulator, as required, per Steps 3 through 8.
NOTES
If the system was over-pressurized during manual fill, a
suitable connection to the system must be opened and the
pressure manually reduced to the desired value. The S460
will then automatically maintain the preset system pressure.
The Restrictor Check Valve prevents the Pressure Regulator
from bleeding down the system pressure.
The system pressure should be set at the minimum required
value, inorder to minimize the time to system trip inthe event
of a sprinkler operation.
Air may be momentarily exhausted from the bleed hole in
the side of the Pressure Regulator after the system pres-
sure has stabilized. This is a normal operating condition.
STAR SPRINKLER INC.
Page 2 2-5.3.11
FIGURE 1
MODEL S460 PRESSURE REDUCING TYPE AUTOMATIC AIR MAINTENANCE DEVICE
2-1/4"
(57.6 mm) 17-1/2" (444.5 mm)
9-3/4"
(248.7 mm)
3-1/4"
(82.6 mm)
BYPASS VALVE
(NORMALLY
CLOSED)
1/2" NPT
INLET CONNECTION
(FROM COMPRESSED
AIR SUPPLY)
1/2" NPT
OUTLET
CONNECTION
AIR SUPPLY
CONTROL VALVE
(NORMALLY OPEN)
#460481002
PRESSURE
REGULATOR
(ADJUSTABLE)
(TO SYSTEM)
STRAINER
RESTRICTOR
CHECK VALVE
#460471004
#923241007 #923221001
#923261003
ADJUSTING
STEM
GAUGE
PORT
OBSOLETE

MAINTENANCE AND SERVICE
The Model S460 Automatic Air Maintenance Device does
not require any regularly scheduled maintenance. It is rec-
ommended, however, that its proper operation and condi-
tion be periodically verified in accordance with the follow-
ing described inspection procedure. Any impairment
must be be immediately corrected.
It is recommended that automatic sprinkler systems be in-
spected by a qualified Inspection Service.
NOTE
Before closing a fire protection system control valve for in-
spection or maintenance work on the fire protection sys-
tem which it controls, permission to shut down the ef-
fected fire protection system must first be obtained from
the proper authorities and all personnel who may be af-
fected by this action must be notified.
INSPECTION PROCEDURE
It is recommended that the following inspection proce-
dure for the S460 be performed quarterly:
1. Verify that the Bypass Valve is closed.
2. Close the S460 Air Supply Control Valve and clean the
1/4 inch Strainer located at the inlet to the Restrictor
Check Valve. Be sure to reinstall the strainer screen and
tighten the cap securely.
3. Open the S460 Air Supply Valve and verify that the con-
trol valve in the air supply trim to the system being pres-
surized is open.
4. Verify that the system pressure is essentially the same
as the previously established requirement. If not, adjust
the system pressure as follows:
a. Close the system’s main control valve and open the
main drain valve.Close the Accelerator Control
Valve, if the system is so equipped.
b. Follow Steps 3 through 10 and 13 in the Setting
Procedure.
c. Slowly open the Accelerator Control Valve, as appli-
cable.
d. Slowly open the main control valve and after water
begins to flow, slowly close the main drain valve
and then completely open the main control valve.
The S460 Air Maintenance Device is now ready for
service.
NOTE
After placing a fire protection system in service, notify the
proper authorities and advise those responsible for moni-
toring proprietary and/or central station alarms.
It is also recommended that accumulated moisture be re-
moved from air supply moisture filtration equipment, at
least quarterly. More frequent inspections may be neces-
sary in particularly humid environments
ORDERING PROCEDURE
Please Specify:
Model S460 Automatic Air Maintenance Device (#1612)
Refer to Price List for for complete listing of Part
Numbers with respect to replacement parts, etc.
AVAILABILITY AND SERVICE
Star Sprinkler Inc. products and devices are available
worldwide through a network of independent distributors.
Please contact Star Sprinkler Inc.for information and the
name and address of the Star distributor in your area.
LIMITED WARRANTY
Seller warrants for a period of one year from date of ship-
ment (warranty period) that the products furnished here-
under will be free of defects in material and workmanship.
For further details on Warranty, contact Star Sprinkler Inc.
STAR SPRINKLER INC.
2-5.3.11 Page 3
OBSOLETE

STAR SPRINKLER INC.
Page 4 2-5.3.11
7071 S. 13th Street • Suite 103
Oak Creek, WI 53154
414-570-5000 • 800-558-5236 PRINTED IN U.S.A. 2-00
OBSOLETE