sure. The supervisory air supply pres-
sure of 10 plus or minus 2 psi (0,69
plus or minus 0,07 bar) can be pro-
vided by any of the following methods.
Refer to the applicable data sheet for
laboratory approval information.
• Model G16AC812 (self contained)
Automatic Supervisory Air Supply
described in Gem Technical Data
Sheet TD126.
• A maximum 200 psi (13,8 bar) plant
air supply in combination with the
Model AMD-1 Air Maintenance De-
vice described in Technical Data
Sheet TFP1221.
• A maximum 3000 psi (206,9 bar)
nitrogen cylinder in combination with
the Model AMD-3 Nitrogen Mainte-
nance Device described in Techni-
cal Data Sheet TFP1241.
NOTE
The dew point of the air or nitrogen
supply, for a system exposed to freez-
ing conditions, must be maintained be-
low the lowest ambient temperature to
which the system piping will be ex-
posed. Introduction of moisture into
the system piping can create ice build
up which could prevent proper opera-
tion of the system.
The Supervisory Low Pressure Alarm
Switch (Item P3 - Fig. 2A) is factory set
at5plusorminus1psi(0,34plusor
minus 0,07 bar) on decreasing pres-
sure. The Pressure Relief Valve (Item
P4- Fig. 2A) is factory set to fully open
at 25 plus or minus 2 psi (1,72 plus or
minus 0,14 bar) and it begins to crack
open at a pressure of about 18 psi
(1,24 bar).
Friction Loss
The nominal pressure loss versus flow
data for the Model DV-5 Deluge Valve
plus Riser Check Valve is provided in
Graph A.
Installation
NOTES
1-1/2 inch (DN40) risers utilize a 2 inch
(DN50) Riser Check valve in combina-
tion with the 1-1/2 inch (DN40) Model
DV-5 Deluge Valve.
Proper operation of the Model DV-5
Deluge Valves depends upon their trim
being installed in accordance with the
instructions given in this Technical
Data Sheet. Failure to follow the ap-
propriate trim diagram may prevent
the DV-5 Valve from functioning prop-
erly, as well as void listings, approvals,
and the manufacturer’s warranties.
The DV-5 Valve must be installed in a
readily visible and accessible location.
The DV-5 Valve and associated trim
must be maintained at a minimum tem-
perature of 40°F/4°C.
Heat tracing of the DV-5 Valve or its
associated trim is not permitted. Heat
tracing can result in the formation of
hardened mineral deposits that are ca-
pable of preventing proper operation.
The Model DV-5 Deluge Valve is to be
installed in accordance with the follow-
ing criteria:
Step 1. All nipples, fittings, and de-
vices must be clean and free of scale
and burrs before installation. Use pipe
thread sealant sparingly on male pipe
threads only.
Step 2. The DV-5 Valve must be
trimmed in accordance with Figure
2A/2B.
Step 3. Care must be taken to ensure
that check valves, strainers, globe
valves, etc. are installed with the flow
arrows in the proper direction.
Step 4. Drain tubing to the drip funnel
must be installed with smooth bends
that will not restrict flow.
Step 5. 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 funnel.
Step 6. Suitable provision must be
made for disposal of drain water.
Drainage water must be directed such
that it will not cause accidental dam-
age to property or danger to persons.
Step 7. Connect the Diaphragm
Chamber Supply Control Valve to the
inlet side of the system’s main control
valve in order to facilitate setting of the
DV-5 Valve (Fig. 3).
Step 8. Unused pressure alarm
switch connections must be plugged.
Step 9. A suitable automatic supervi-
sory air (nitrogen) supply, as described
in the Technical Data Section, is to be
installed in accordance with the appli-
cable Technical Data Sheet and set for
10 plus or minus 2 psi (0,69 plus or
minus 0,14 bar).
Step 10. A desiccant dryer, when re-
quired for the supervisory air supply, is
to be installed between a drip leg and
theModelAMD-1AirMaintenanceDe-
vice or between the Model G16AC812
Automatic Supervisory Air Supply and
the Preaction Trim.
Step 11. The Supervisory Low Pres-
sure Alarm Switch is to be wired to the
supervisory alarm initiating circuit of
an alarm panel.
Step 12. Conduit and electrical con-
nections are to be made in accordance
with the requirements of the authority
having jurisdiction and/or the National
Electric Code.
Step 13. Before a system hydrostatic
test is performed in accordance with
NFPA 13 system acceptance test re-
quirements, the DV-5 Diaphragm
Chamber is to be depressurized; the
Automatic Drain Valve (Item 4, Fig. 2A)
is to be temporarily replaced with a 1/2
inch NPT plug, the 3/32 inch Vent Fit-
ting (16 - Fig. 2A) is to be temporarily
replaced with a 1/4 inch NPT plug, and
the Diaphragm Cover Bolts must be
uniformly and securely tightened
using a cross-draw sequence. After
tightening, double-check to make cer-
tain that all of the Diaphragm Cover
Bolts are securely tightened.
Valve Setting
Procedure
Steps 1 through 12 are to be per-
formed when initially setting the Model
DV-5 Deluge Valve; after an opera-
tional test of the fire protection system;
or, after system operation due to a fire.
Step 1. Close the Main Control Valve.
Step 2. Close the Diaphragm Cham-
ber Supply Control Valve and the Su-
pervisory Air Supply Control Valve.
Step 3. Open the Main Drain Valve,
System Drain Valve, and all auxiliary
drains in the system. After water
ceases to discharge, close the System
Drain Valve and auxiliary drain valves.
Leave the Main Drain Valve open.
Step 4. Depress the plunger of the
Automatic Drain Valve to verify that it
is open and that the DV-5 Valve is
completely drained.
Step 5. Clean the Strainer in the Dia-
phragm Chamber Supply connection
by removing the clean-out plug and
strainer basket. The Strainer may be
flushed out by momentarily opening
the Diaphragm Chamber Supply Con-
trol Valve.
Step 6. Reset the actuation system.
Manual Actuation — Push the operat-
ing lever up; however, do not close the
hinged cover at this time.
Electric Actuation — Reset the electric
detection system in accordance with
the manufacturer’s instructions to de-
energize the Solenoid Valve.
Step 7. Open the Diaphragm Chamber
Supply Control Valve and allow time for
full pressure to build up in the Dia-
phragm Chamber.
Step 8. Operate (open) the Manual
Control Station to vent trapped air from
the Diaphragm Chamber. If necessary,
Page 11 of 14
TFP1420
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