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Model TAV-D
Air Vent, Dry
General The Restricted Venting Orifice allows
oxygen to be vented from the fire
Description sprinkler system at a controlled rate to
achieve a minimum nitrogen concen-
tration of 98%. A special fitting is pro-
The TYCO Model TAV-D Air Vent, Dry,
vided to receive 5/32 in. tubing when
provides oxygen venting in dry pipe
the vent is used in conjunction with
fire sprinkler systems. As a fire sprin-
the TYCO Model TSGA SMART Gas
kler system is filled with a continuous
Analyzer.
supply of nitrogen gas from the TYCO
Nitrogen Generator, the Air Vent allows There are two models of the TYCO Air
oxygen rich gas to be vented from the Vent, the TAV-D and the TSV-D. The
fire sprinkler system. Over a short units both operate as described above
period of time the Air Vent will almost but the TSV-D model includes an elec-
completely remove oxygen from the fire tronic solenoid valve wired to a control
sprinkler system (< 2% oxygen). panel that automatically closes the vent
once the desired nitrogen concentra-
The Air Vent must be installed as
tion is reached. The control panel is
shown on the engineering design doc-
uments. If a location is not specified,
install the Air Vent on the fire sprinkler
also equipped with a reset switch to
allow the venting process to restart Technical
system riser on the system side of the
main control valve. The vent is also
should oxygen be reintroduced into the
fire sprinkler system. Data
installed to provide source gas when Service Pressure
used in conjunction with the TYCO NOTICE Up to 175 psig (12 bar)
TSGA SMART Gas Analyzer. The TYCO Model TAV-D Air Vent, Dry, System Connection
The Air Vent is equipped with a levered described herein must be installed and 1 in. NPT Male
Float Valve that allows oxygen to maintained in compliance with this
discharge but prevents water from document, in addition to the standards Temperature Range
of any other authorities having jurisdic- 40°F to 120°F (4.5°C to 49°C)
leaking through the restricted venting
orifice in the event that water enters tion. Failure to do so may impair the Dimensions
the fire sprinkler system, as shown performance of the related devices. 13.5 in. (W) x 4.25 in. (D) x 7.5 in. (H)
in Figure 1. A Backpressure Regula- (343 mm (W) x 108 mm (D) X 191 mm (H))
tor is also included to prevent total The owner is responsible for main-
system depressurization from the vent taining their fire protection system
assembly. and devices in proper operating con-
dition. Contact the installing contrac-
tor or product manufacturer with any
questions.
IMPORTANT
Refer to Technical Data Sheet
TFP2300 for warnings pertaining to
regulatory and health information.
Page 1 of 4 NOVEMBER 2019 TFP1262
TFP1262
Page 2 of 4
IN-LINE FILTER RESTRICTED VENTING ORIFICE
MUFFLER
GAS SAMPLE PORT
FLOAT BACKPRESSURE REGULATOR
VALVE
CONNECTION TO
SPRINKLER SYSTEM
“Y” STRAINER
WITH BALL VALVE
ISOLATION
BALL VALVE
QUICK CONNECT
FIGURE 1
MODEL TAV-D AIR VENT DRY
ASSEMBLY
Operation Step 6. Push the knob back into the
regulator until it clicks into place. Installation
Step 1. Verify the vent assembly is Step 7. Once the TYCO Nitrogen Gen- The TYCO Model TAV-D Air Vent, Dry
equipped with a restricted venting erator is commissioned, open the iso- must be installed in accordance with
orifice downstream of the backpres- lation ball valve on the vent assembly. this section.
sure regulator. The Air Vent is now open and actively Step 1. The Model TAV-D Air Vent is
Note: If the vent assembly is not equipped venting oxygen from the fire sprin- equipped with a ball valve to be con-
with a restricted venting orifice, one will be kler system. It should remain open nected to the fire sprinkler riser. The
provided by TYCO during system commis- for approximately 14 days or until the contractor must install a 1 in. outlet
sioning. The restricted venting orifice must system nitrogen concentration reaches
be installed before proceeding with the (welded or mechanical) to connect the
steps below.
98% or greater. Use a TYCO Model vent assembly to the sprinkler system
THGA Handheld Gas Analyzer to verify on the system side of the main control
Step 2. Determine the low air alarm the gas concentration inside the fire valve as shown in Figure 2. The ball
pressure and the turn-on pressure of sprinkler system. valve must remain in the closed posi-
the nitrogen generator.
Step 8. Close the isolation ball valve. tion until the TYCO Nitrogen Generator
Step 3. Choose a pressure setting Failure to close the manual ball valve is commissioned.
for the backpressure regulator that after 14 days or once the fire sprinkler Step 2. Install the vent assem-
is 3 to 5 psig (0,2 to 0,3 bar) above system nitrogen concentration reaches bly in a level position. The recom-
the low air alarm pressure but below 98% will result in additional oxygen mended mounting height is between
the turn-on pressure of the nitrogen corrosion damage to the system and 5 ft to 10 ft (2 m to 3 m) above the fin-
generator. unnecessary run time of the air com- ished floor.
Step 4. Pull the knob out from the reg- pressor and nitrogen generator.
Note: Piping to the vent assembly cannot be
ulator to adjust the pressure setting. Step 9. If the sprinkler system actuates installed in a configuration that would trap
Turn the knob clockwise to raise the or another event introduces oxygen water and prevent drainage to the sprinkler
pressure, counter-clockwise to lower to the sprinkler system the manual system; a water trap impedes the ability of
the pressure. ball valve must be opened again for a the vent assembly to vent oxygen from the
fire sprinkler system.
Step 5. Close the ball valve and allow period of 14 days to vent oxygen from
the system. Step 3. Inspection of the vent assem-
the device to depressurize through
bly should be performed after installa-
the restricted venting orifice to the
tion and hydrostatic testing of the fire
pressure setting. Adjust the pressure
sprinkler system. Inspection should
setting using the knob, then open the
be performed periodically thereaf-
ball valve to pressurize the device and
ter in accordance with the applicable
close the ball valve again to check the
NATIONAL FIRE PROTECTION ASSO-
pressure setting. Repeat the process
CIATION (NFPA) codes and standards
until the desired pressure setting is
and/or the authority having jurisdiction.
achieved.
Note: Inspection must include the condition
Note: This process can only be performed of the in-line filter and checking for blockage
when the fire sprinkler system is at normal in the “Y” strainer and the restricted venting
operating pressure. orifice.
TFP1262
Page 3 of 4
MODEL TAV-D
MANUAL VENT 1“ OUTLET REQUIRED
NITROGEN SUPPLY
DRY/PREACTION
SPRINKLER VALVE
RISER
FIGURE 2
MODEL TAV-D AIR VENT DRY
INSTALLATION SCHEMATIC
FILTER HOUSING
FILTER
SCHRADER VALVE
FIGURE 3
MODEL TAV-D AIR VENT DRY
IN-LINE FILTER
Care and Inspection, testing, and maintenance
must be performed in accordance
Inspection Instructions
Step 1. The Model TAV-D Air Vent
Maintenance with the requirements of the NFPA, and
any impairment must be immediately
must be inspected annually at mini-
mum. While the isolation ball valve
corrected. is in the open position check for air/
The TYCO Model TAV-D Air Vent, Dry
water leaks and ensure the pressure
must be maintained and serviced in The owner is responsible for the inspec- gauge is displaying normal system
accordance with this section. tion, testing, and maintenance of their pressure.
Before closing a fire protection system fire protection system and devices in
main control valve for maintenance compliance with this document, as well Step 2. While the isolation ball valve
work on the fire protection system that as with the applicable standards of any is in the closed position inspect the
it controls, permission to shut down authorities having jurisdiction. Contact condition of the inline filter and for
the affected fire protection systems the installing contractor or product blockage in the “Y” strainer and
must first be obtained from the proper manufacturer with any questions. restricted venting orifice. Twist the
authorities. All personnel who may black Filter Housing clockwise until it
be affected by this decision must be can be removed to expose the filter
notified. element.
Step 3. Replace the In-Line Filter ele-
ment if a visual inspection reveals a
significant collection of debris.
TFP1262
Page 4 of 4
In-Line Filter Replacement
Instructions Limited Ordering
Step 1. Close the isolation ball valve.
Step 2. Depressurize the housing by
Warranty Procedure
pressing the SCHRADER valve on For warranty terms and conditions, visit Contact your local distributor for avail-
the bottom of the in-line filter housing www.tyco-fire.com. ability. When placing an order, indicate
shown in Figure 3. the full product name and Part Number
(P/N).
Step 3. Remove the lower section of
the In-Line Filter housing by turning Air Vent, Dry
the filter housing counterclockwise. Specify: Model TAV-D Air Vent, Dry,
P/N TAVD01
Note: A rubber o-ring/seal is located
between the upper and lower sections of Replacement Filter Kit
the filter housing. Specify: Model TFLT Replacement
Step 4. Remove the old filter by turn- Filter Kit, P/N TVDFLT
ing the filter counterclockwise.
Step 5. Replace with a new filter,
TYCO Model TFLT Replacement Filter
Kit. The filter is secured to the hous-
ing by turning the filter clockwise.
Note: Ensure the filter housing is secured
only finger/hand tight.
Step 6. Install the rubber o-ring/seal
on the lower section of the filter hous-
ing.
Step 7. Re-install the filter housing by
turning the filter housing clockwise.
Note: Ensure the filter housing is secured
only finger/hand tight.
Step 8. Open the isolation ball valve.
1400 Pennbrook Parkway, Lansdale, PA 19446 | Telephone +1-215-362-0700
© 2019 Johnson Controls. All rights reserved. All specifications and other information shown were current as of document revision date and are subject to change without notice.
NATIONAL FIRE PROTECTION ASSOCIATION and NFPA are registered trademarks of National Fire Protection Association;
SCHRADER is a trademark of Schrader-Bridgeport International, Inc.
