TFP1090
Page 10 of 20
Step 10D. Replace the Vent Plug.
Step 10E. Verify that the system air
pressure has returned to normal.
Step 10F. Using a watch, note the
time for the pressure in the Differen-
tial Chamber of the Accelerator to
increase to 0,7 bar after the Accel-
erator Control Valve is opened. The
time should be within the range of
values indicated in Table C for opti-
mum performance of the Accelerator.
If the time to pressurize the Differen-
tial Chamber to 0,7 bar is not within
the range of values given in the Table
C, then the Accelerator Control Valve
should be closed and the corrective
procedure described in the Care and
Maintenance Section of ACC-1 Tech-
nical Data Sheet TFP1112 should be
followed.
Step 10G. When the air pressure
in the Differential Chamber of the
Accelerator is equal to that in the
system, then the Accelerator is set
and ready for service.
Step 10H. Close the Accelerator
Control Valve and then slowly open
the Low Body Drain Valve in the
trim, to bleed off any excess water
trapped above the Dry Pipe Valve
Clapper. Close the Low Body Drain
Valve, return system pressure to its
normal value, and then re-open the
Accelerator Control Valve.
Step 11. Partially open the Main Con-
trol Valve. Slowly close the Main Drain
Valve as soon as water discharges from
the drain connection.
Verify that there is not any water dis-
charging from the Automatic Drain
Valve.
The absence of water discharging from
the Automatic Drain Valve is an indica-
tion of a properly set water seat within
the Model DPV-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 DPV-1
Dry Pipe Valve is ready to be placed
in service and the Main Control Valve
must then be fully opened.
After setting a fire protection system,
notify the proper authorities and advise
those responsible for monitoring pro-
prietary and/or central station alarms.
Step 12. Once a week after a valve is
reset following an operational test or
system operation, the Low Body Drain
Valve (and any low point drain valves)
should be partially opened (and then
subsequently closed) to relieve drain-
back water. Continue this procedure
until drain-back water is no longer
present.
Care and
Maintenance
The following procedures and inspec-
tions should be performed as indicated,
in addition to any specific require-
ments of any authority having jurisdic-
tion. Impairments must be immediately
corrected.
The owner is responsible for the
inspection, testing, and maintenance of
their fire protection system and devices
in compliance with this document, as
well as with the applicable standards
of any authority having jurisdiction. The
installing contractor or product manu-
facturer should be contacted relative to
any questions.
Automatic sprinkler systems are rec-
ommended to be inspected, tested,
and maintained by a qualified Inspec-
tion Service.
NOTICE
The operational test procedure and
waterflow pressure alarm test pro-
cedure will result in operation of the
associated alarms. Consequently,
notification must first be given to the
owner and the fire department, central
station, or other signal station to which
the alarms are connected.
Before closing a fire protection system
Main Control Valve for maintenance
work on the fire protection system
that it controls, obtain permission to
shut down the affected fire protection
systems must first be obtained from the
proper authorities and notify all person-
nel who may be affected by this deci-
sion must be notified.
Annual Operation
Test Procedure
Proper operation of the Model DPV-1
Dry Pipe Valve (that is, opening of the
Model DPV-1 Dry Pipe Valve during
a fire condition) should be verified at
least once a year as follows:
Step 1. If water must be prevented
from flowing beyond the riser, perform
the following steps:
• Close the Main Control Valve.
• Open the Main Drain Valve.
• Open the Main Control Valve one turn
beyond the position at which water
just begins to flow from the Main
Drain Valve.
• Close the Main Drain Valve.
Step 2. Open the system’s Inspector’s
Test Connection.
Step 3. Verify that the Model DPV-1
Dry Pipe Valve has operated, as indi-
cated by the flow of water into the
system and that all waterflow alarms
operate properly.
Step 4. Close the system’s Main Con-
trol Valve.
Step 5. Reset the Model DPV-1 Dry
Pipe Valve in accordance with the Valve
Setting Procedure.
The inside of the valve is recommended
to be inspected at this time and prior
to resetting the Model DPV-1 Dry Pipe
Valve. Refer to Steps 2 through 5 in
the Inspection Procedure section on
the Automatic Drain Valve for instruc-
tions on the inspection of the Clapper
Facing.
Water Supply
Pressure, bar
System Air
Pressure
Range, bar
1,4 0,7
4,1 1,0 - 1,6
5,5 1,4 - 1,9
6,9 1,7 - 2,3
8,3 2,1 - 2,6
10,0 2,4 - 3,0
11,4 2,8 - 3,3
12,8 3,1 - 3,7
14,1 3,4 - 4,0
15,5 3,8 - 4,3
16,0 4,1 - 4,6
Pressure
(bar)
Minimum
(sec.)
Maximum
(sec.)
1,4 24 160
1,7 18 116
2,1 15 92
2,8 10 60
3,5 8 48
4,1 6 36
TABLE C
ACCELERATOR
DIFFERENTIAL CHAMBER
FILL TIMES TO 0,7 BAR
TABLE B
SYSTEM AIR PRESSURE
REQUIREMENTS
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