Installation - Tyco DN100 Manual

TFP1486
Page 14 of 18

Installation

TYCO Model DPV-1 Preaction Type B
Valves are to be installed in accordance
with this section.
Alteration of the trim may prevent the
Model DPV-1 Preaction Type B Valves
from functioning properly, as well as
void approvals and the manufacturer's
warranties.
Failure to latch open the Clapper
Assembly prior to a system hydro-
static test may result in damage to the
Clapper Assembly.
The Model DPV-1 Preaction Type B
Valve must be installed in a readily
visible and accessible location.
The Model DPV-1 Preaction Type B
Valve and associated trim must be
maintained at a minimum temperature
of 4°C.
NOTICE
Heat tracing of the Model DPV-1 Preac-
tion Type B Valve or its associated trim
is not permitted. Heat tracing can result
in the formation of hardened mineral
deposits that are capable of prevent-
ing proper operation.
Step 1. The Model DPV-1 Preaction
Type B Valve must be installed with fac-
tory assembled trim.
Step 2. Suitable provision must be
made for disposal of drain water. Drain-
age water must be directed such that
it will not cause accidental damage to
property or danger to persons.
Step 3. Installation of an Air Mainte-
nance Device, as described in the Tech-
nical Data section, is recommended.
Step 4. An Inspector's Test Connec-
tion must be provided on the system
piping at the most remote location
from the Model DPV-1 Preaction Type
B Valve.
Step 5. Conduit and electrical con-
nections are to be made in accordance
with the requirements of the authority
having jurisdiction.
Step 6. Before a system hydrostatic
test is performed in accordance with the
standards recognized by the Approval
agency, in addition to any other author-
ities having jurisdiction, the Clapper
Assembly is to be manually latched
open (see Figure 6D); the Automatic
Drain Valve (see Figures 1 and 10) is to
be temporarily plugged; and, the Hand-
hole Cover Bolts are to be tightened
using a cross-draw sequence.
Valve Setting
Procedure
The following steps are to be per-
formed when initially setting the TYCO
Model DPV-1 Preaction Type B Valves,
after an operational test of the fire pro-
tection system, or after system opera-
tion due to a fire.
Step 1. Close the Main Control Valve,
Air Supply Control Valve, and Acceler-
ator Control Valve.
Step 2. Open the Main Drain Valve
and all auxiliary drains in the system.
Close the auxiliary drain valves after
water ceases to discharge. Leave the
Main Drain Valve open.
Step 3. Reset the Automatic Fire
Detection Releasing Panel to de-ener-
gize and close the Solenoid Valve.
Step 4. Verify that the Automatic Drain
Valve has stopped draining to deter-
mine the Model DPV-1 Preaction Type
B Valve is completely drained.
Step 5. As necessary, replace all
sprinklers that have operated. Replace-
ment sprinklers must be of the same
type and temperature rating as those
which have operated.
In order to prevent the possibility of
a subsequent operation of an over-
heated solder type sprinkler, any solder
type sprinklers which were possibly
exposed to a temperature greater than
their maximum rated ambient must be
replaced.
Step 6. Push down on the Reset Knob
(Figure 3E) to allow the Clapper Assem-
bly to re-seat.
Step 7. Pressurize the system with
air (or nitrogen) to 0,7 bar, and then
individually open all auxiliary drain
valves in the system piping to drain
any remaining water in trapped sec-
tions. Close each drain valve as soon
as water ceases to discharge. Also par-
tially open the Low Body Drain Valve in
the valve trim to assure that the riser
is completely drained. Close the Low
Body Drain Valve as soon as water
ceases to discharge.
Step 8. Refer to Table A and then
restore the system to the normal sys-
tem air pressure as necessary to hold
the Model DPV-1 Preaction Type B
Valve closed.
Step 9. Verify that air is not discharg-
ing from the Automatic Drain Valve.
The absence of air discharging from
the Automatic Drain Valve is an indica-
tion of a properly set air seat within the
Model DPV-1 Preaction Type B Valve.
If air is discharging, see the Care and
Maintenance section under Auto-
matic Drain Valve Inspection to deter-
mine/correct the cause of the leakage
problem.
Pressure, Minimum,
bar sec.
1,4 24
1,7 18
2,1 15
2,8 10
3,5 8
4,1 6
TABLE B
DIFFERENTIAL CHAMBER
FILL TIMES TO 0,7 BAR
Step 10. Reset the Dry Pipe Valve
Accelerator in accordance with Steps
10a through 10h:
Step 10a. While holding the plunger
of the Automatic Drain Valve
depressed, open the Accelera-
tor Control Valve one-quarter turn
and allow the water in the Acceler-
ator piping to blow out. After water
spray stops discharging, close the
Accelerator Control Valve and then
release the plunger.
Step 10b. Slowly remove the Vent
Plug located in the front of the
Accelerator Cover and bleed off any
residual air pressure in the Differen-
tial Chamber.
Step 10c. Unscrew (counter-clock-
wise rotation) the knurled Reset
Knob at the front of the Accelera-
tor until it resists further turning.
A click, which is the sound of the
Lever snapping back into the Set
Position, may be heard. Screw the
Reset Knob back in until it is finger
tight. Do not wrench on the Reset
Knob, since damage may result.
The Reset Knob will turn with finger
torque only.
Step 10d. Replace the Vent Plug.
Step 10e. Verify that the system air
pressure has returned to normal.
Step 10f. Note how long it takes
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
B for optimum performance of the
Accelerator.
If the time to pressurize the Dif-
ferential Chamber to 0,7 bar is not
within the range of values given in
the Table B, then the Accelerator
Control Valve should be closed and
the corrective procedure described
in the Care and Maintenance Sec-
tion of Technical Data Sheet
TFP1100 should be followed.
Maximum,
sec.
160
116
92
60
48
36