Tyco DV-5 - DN200 Wet Pilot Trim Assembly

TFP1484
Page 14 of 16
Step 7. Slowly open the Main Control
Valve. Close the Main Drain Valve as
soon as water discharges from the
drain connection. Observe the Auto-
matic Drain Valve for leaks. If there are
leaks, determine/correct the cause of
the leakage problem. If there are no
leaks, the DV-5 Preaction Type A Valve
is ready to be placed in service and the
Main Control Valve must then be fully
opened.
NOTICE
When the Main Control Valve is
opened, the pressure on the Dia-
phragm Chamber may increase. This
increase in pressure is normal, and if
the pressure is greater than 16 bar, the
pressure is to be relieved by partially
and temporarily opening the Manual
Control Station; however, do not allow
the pressure as indicated on the Dia-
phragm Chamber Pressure Gauge to
drop below the supply pressure shown
on the Water Supply Pressure Gauge,
since this action may result in tripping
of the DV-5 Preaction Type A Valve.
Quarterly
Supervisory Low Pressure Alarm
Test Procedure
Proper operation of the Supervisory
Low Pressure Alarm Switch must be
performed quarterly as follows:
Step 1. Crack open the System Drain
Valve for the Riser Check Valve to
slowly relieve air pressure from the
system. Verify that the Supervisory Low
Pressure Alarm Switch is operational
and that the low pressure set point is
approximately 0,7 bar under the system
pressure.
Step 2. Close the System Drain Valve
and allow the system supervisory pres-
sure to be automatically re-established.
The Supervisory Low Pressure Alarm
Switch should return to its “normal”
condition.
Annual
Operation Test Procedure
Proper operation of the DV-5 Preaction
Type A Valve (i.e., opening of the DV-5
Valve as during a fire condition) must be
verified at least once a year as follows:
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 ow from the
Main Drain Valve.
• Close the Main Drain Valve.
Step 1. Test the deluge releasing panel
in accordance with the manufacturer’s
instructions to energize the Solenoid
Valve.
FLOW RATE IN LITERS PER MINUTE (LPM)
NOMINAL PRESSURE DROP IN BAR
200 1000600400 2000 70003000 5000 10000
0,04
0,03
0,05
0,08
0,06
0,07
0,09
0,10
0,20
0,40
0,30
0,60
0,50
DN50
DN40
DN150
DN100
DN80
DN200
15000
0,02
GRAPH A
DN40 THRU DN200 DV-5 VALVE AND MODEL CV-1FR VALVE
NOMINAL PRESSURE LOSS VERSUS FLOW
OBSOLETE