TFP1020
Page 16 of 20
Installation
General Instructions
Proper operation of the Model DPV-1
Dry Pipe Valve depends upon its trim
being installed in accordance with the
instructions given in this Technical Data
Sheet. Failure to follow the appropriate
trim diagram may prevent the DPV-1
Valve from functioning properly, as
well as void listings, 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 DPV-1 Valve must be installed in a
readily visible and accessible location.
The DPV-1 Valve and associated trim
must be maintained at a minimum tem-
perature of 40°F (4°C).
Heat tracing of the DPV-1 Valve or its
associated trim is not permitted. Heat
tracing can result in the formation of
hardened mineral deposits that are
capable of preventing proper operation.
The Model DPV-1 Dry Pipe Valve is to
be installed in accordance with the fol-
lowing criteria:
• All nipples, fittings, and devices must
be clean and free of scale and burrs
before installation. Use pipe thread
sealant sparingly on male pipe
threads only.
• The DPV-1 Valve must be trimmed
in accordance with Figures 4, 5, or
6, as applicable. If the DPV-1 is to
be equipped with a Dry Pipe Valve
Accelerator, refer to the Technical
Data Sheet TFP1105 for the VIZOR
Electronic Dry Pipe Valve Accel-
erator or TFP1112 for the Model
ACC-1 Mechanical Dry Pipe Valve
Accelerator.
• Care must be taken to make sure that
check valves, strainers, globe valves,
etc. are installed with the flow arrows
in the proper direction.
• Drain tubing to the drip funnel must
be installed with smooth bends that
will not restrict flow.
• The main drain and drip funnel drain
may be interconnected provided a
check valve is located at least 12
inches (300 mm) below the drip fun-
nel. The Low Body Drain Valve (Fig-
ure 4, 5, or 6) may be piped so as to
discharge into the Drip Funnel or to
a separate drain.
• Suitable provision must be made
for disposal of drain water. Drainage
water must be directed such that it
will not cause accidental damage to
property or danger to persons.
• Unused pressure alarm switch and/
or water motor alarm connections
must be plugged.
• The Pressure Relief Valve provided
with the Valve Trim is factory set to
relieve at a pressure of approximately
45 psi (3,1 bar), which can typically
be used for a maximum normal sys-
tem air pressure of 40 psi (2,8 bar).
The Pressure Relief Valve may be
reset to a lower or higher pressure;
however, it must be reset to relieve
at a pressure which is in accordance
with the requirements of the author-
ity having jurisdiction.
To reset the Pressure Relief Valve,
first loosen the jam nut and then
adjust the cap accordingly —
clockwise for a higher pressure
setting or counter-clockwise for a
lower pressure setting. After veri-
fying the desired pressure setting,
tighten the jam nut.
• Installation of an Air Maintenance
Device, as described in the Techni-
cal Data Section, is recommended.
• An Inspector’s Test Connection as
required By NFPA 13 must be pro-
vided on the system piping at the
most remote location from the Model
DPV-1 Valve.
• Conduit and electrical connections
are to be made in accordance with
the requirements of the author-
ity having jurisdiction and/or the
National Electric Code.
• Before a system hydrostatic test is
performed in accordance with NFPA
13 system acceptance test require-
ments, the Clapper Assembly is to
be manually latched open (Ref. Fig-
ure 3D); the Automatic Drain Valve
(Figure 4, 5, or 6) is to be temporar-
ily replaced with a 1/2 inch NPT plug,
the 3/32 inch Vent Fitting (Item 13,
Figure 4; Item 15, Figure 5; or Item
15, Figure 6) is to be temporarily
replaced with a 1/4 inch NPT plug,
and the Handhole Cover Bolts are
to be tightened using a cross-draw
sequence.
Valve Setting
Procedure
Steps 1 through 11 are to be performed
when initially setting the Model DPV-1
Dry Pipe Valve; after an operational test
of the fire protection system; or, after
system operation due to a fire.
NOTES:
If the DPV-1 is equipped with
a Dry Pipe Valve Accelerator, refer to
its resetting instructions before reset-
ting the DPV-1. Refer to TFP1105 for the
VIZOR or TFP1112 for the ACC-1.
Based on the instructions provided,
reset the Accelerator at the appropriate
time during the resetting of the DPV-1.
Unless otherwise noted, refer to Figure
4, 5, or 6 to identify functional trim
components.
Step 1.
Close the Main Control Valve,
and close the Air Supply Control Valve.
If the DPV-1 is equipped with a Dry
Pipe Valve Accelerator, remove the Dry
Pipe Valve Accelerator from service in
accordance with its Technical Data
Sheet (Refer to TFP1105 for the VIZOR
or TFP1112 for the ACC-1).
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.
Depress the plunger of the
Automatic Drain Valve to verify that it is
open and that the DPV-1 Valve is com-
pletely drained.
Step 4.
Open the Optional Alarm
Control Valve, as applicable, if it was
closed to silence local alarms.
Step 5.
As necessary, replace all sprin-
klers that have operated. Replacement
sprinklers must be of the same type
and temperature rating as those which
have operated.
NOTICE
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 10 psi (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 partially open the Low Body Drain
Valve to assure that the riser is com-
pletely drained. Close the Low Body
Drain Valve as soon as water ceases
to discharge.
Step 8.
Refer to Table B and then
restore the system to the normal
system air pressure as necessary to
hold the DPV-1 Valve closed.
Step 9.
Depress the plunger on the
Automatic Drain Valve to make sure
it is open and that there is no air
discharging.
