SETTING PROCEDURE
Steps 1 through 14 are to be performed when initially set-
ting the Model A-1 Dry Pipe Valve; after an operational
test of the fire protection system; or, after system opera-
tion due to a fire (Ref. Figure 5).
1. Close the Main Control Valve, close the Air Supply Con-
trol Valve, and close the Accelerator Control Valve, if ap-
plicable.
2. Open the Main Drain Valve, Alarm Line Drain Valve,
and all auxiliary drains in the system. Close the Alarm
Line Drain Valve and auxiliary drain valves after water
ceases to discharge. Leave the Main Drain Valve open.
3. Depress the plunger of the Automatic Drain Valve to ver-
ify that it is open and that the Model A-1 Dry Pipe Valve
is completely drained.
4. Open the Alarm Control Valve, if it was closed to silence
local alarms.
It is recommended that the Alarm Control Valve be wire
sealed in the open position.
5. As necessary, replace all sprinklers that have operated.
Replacement sprinklers must be of the same type and
temperature rating as those which have operated.
NOTE
In order to prevent the possibility of a subsequent operation
of an overheated solder type sprinkler, any solder type sprin-
klers which were possibly exposed to a temperature greater
than their maximum rated ambient must be replaced.
6. Remove the Handhole Cover and then clean all interior
parts of the Model A-1 Dry Pipe Valve. Use a clean cloth
to wipe the Air and Water Seat Rings, as well as the
Clapper Facing. Inspect the Clapper Facing, as well as
the Air and Water Seat Rings for damage and check the
Clapper Assembly and Clapper Latch for freedom of
movement.
Worn or damaged parts must be replaced and the
Model A-1 Dry Pipe Valve must be reassembled in ac-
cordance with Figure 1.
7. Reseat the Clapper Assembly.
NOTE
When the Clapper Assembly is properly seated, the Clapper
Latch should swivel freely.
8. Replace the Handhole Cover and Handhole Cover Gas-
ket. Uniformly tighten the Cover Bolts using a cross-
draw sequence.
9. Open the 1 inch NPT Priming Connection, and prime
the Model A-1 Dry Pipe Valve by slowly pouring water
into the 1 inch NPT Priming Connection until the water
does not continue to flow into the valve. Approximately 4
gallons (15 litres) of prime water will be required.
Open the Priming Test Valve. After water stops discharg-
ing from the Priming Test Valve, close the Priming Valve
and the 1 inch NPT Priming Connection.
Minor drippage of water form the Automatic Drain Valve
is normal, until system air pressure is ultimately estab-
lished in Step 11 and 12.
10. Pressurize the system with air (nitrogen) to 10 psi (0.7
bar), and then individually open all auxiliary drain valves
in the system piping to drain any remaining water in
trapped sections. Close each drain valve as soon as
water ceases to discharge.
11. Refer to Table A and then restore the system to the nor-
mal system air pressure necessary to hold the Model
A-1 Dry Pipe Valve closed.
12. Depress the plunger on the Automatic Drain Valve to en-
sure it is open and that there is no water or air discharg-
ing.
If water and/or air is discharging, refer to the Care and
Maintenance section under Automatic Drain Valve In-
spection to determine/correct the cause of the leakage
problem.
13. If applicable, reset the Model S430 Dry Pipe Valve Ac-
celerator following the instructions provided in 2-5.4.10.
14. Partially open the Main Control Valve. Close the Main
Drain Valve as soon as water discharges from the drain
connection.
Depress the plunger on the Automatic Drain Valve to
make sure that it is open and that there is no water dis-
charging. The absence of water discharging is an indica-
tion of a properly set water seat within the Model A-1
Dry Pipe Valve. If water is discharging, refer to the Care
and Maintenance section under the Automatic Drain
Valve Inspection to determine/correct the cause of the
leakage problem.
If there are no leaks, the Model A-1 Dry Pipe Valve is
readytobeplacedinserviceandtheMainControl
Valve must then be fully opened.
NOTE
After setting a fire protection system, notify the proper
authorities and advise those responsible for monitoring
proprietary and/or central station alarms.
MAINTENANCE AND SERVICE
The following procedures and inspections should be per-
formed as indicated, in addition to any specific require-
ments of the NFPA. Any impairment must be immedi-
ately corrected. It is also recommended that fire
protection systems be inspected by a qualified Inspection
Service.
NOTES
The operational test procedure and waterflow pressure
alarm test procedure, result in operation of the associ-
ated alarms. Consequently, notification must first be
given to the owner and the fire department, central sta-
tion, or other signal station to which the alarms are con-
nected.
Before closing a fire protection system main control valve
for maintenance work on the fire protection system which
it controls, permission to shut down the effected fire pro-
tection systems must first be obtained from the proper
authorities and all personnel who may be affected by this
decision must be notified.
Annual Operation Test Procedure
Proper operation of the Model A-1 Dry Pipe Valve (i.e.,
tripping of the Model A-1 Dry Pipe Valve as during a fire
STAR SPRINKLER INC.
2-2.1.41
Page 7
System Water System Air Pressure, psi
Pressure, psi Minimum Maximum
50 15 25
75 25 35
100 35 45
125 40 50
150 40 50
175 40 50
TABLE A
RECOMMENDED SYSTEM AIR PRESSURE
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