ECS PAV-W User manual

Specifications
Stock Number:
Service Pressure:
System Connection:
Temperature Range:
Dimensions:
Weight:
Clear Height:
PAV-W
PAV-WS (Supervised)
Up to 175 PSIG (12 Bar)
½” NPT Male
40°F - 270°F (4.5°C - 132°C)
14” (W) x 7” (H) x 7” (D)
356mm (W) x 177mm (H) x 177mm (D)
8 Lbs (3.6 Kg)
5” (127mm)
General Description
The ECS Ejector Automatic Air Vent (PAV-W/WS) is a device that provides automatic venting of trapped air in wet
pipe fire sprinkler systems. As a fire sprinkler system is filled with water, trapped air migrates to the high point of the
system near the vent installation location which allows for trapped air to be vented. Trapped air contains oxygen
which is the primary cause of corrosion in fire sprinkler systems. Corrosion in wet pipe fire sprinkler systems is
directly proportional to the amount of oxygen trapped within the system piping, so a reduction in trapped air will in
turn reduce the internal corrosion activity of the fire sprinkler system. Venting the trapped air in a wet pipe sprinkler
system can improve water delivery time and reduce false water flow alarms.
The ECS Ejector Automatic Air Vent must be installed as shown on the engineering design documents. If a location
is not provided, install the vent at an accessible high point on the fire sprinkler system remote from the system riser
where gas can be vented and at a location that the pressure gauge provided for visual monitoring can be viewed
from directly below. The PAV-W/WS is also equipped with brass components that allows the device to be installed
in areas subject to external corrosion. The float mechanism on the ECS Ejector Automatic Air Vent will automatically
close when water reaches the vent and the redundant design eliminates the need to plumb the PAV-W/WS to drain.
If the primary float valve allows any significant amount of water to leak past it, the second float valve will close
preventing water from discharging and provide a system pressure reading on the pressure gauge. This condition will
be an indication that the primary automatic gas vent valve has failed and requires service or replacement. The
pressure gauge is designed to be visible from the floor below the ECS Ejector Automatic Air Vent from a distance of
approximately 30 feet.
There are two available models of the ECS Ejector Automatic Air Vent: PAV-W and PAV-WS. The units both operate
as described previously; however, the PAV-WS includes a single contact rated 24VAC/DC @ 2A for electronic
monitoring. When connected to a building alarm system, connect the contact of the PAV-WS using an end-of-line
resistor (EOLR) in accordance with the wiring diagram in Figure 1.
• Patented redundant float design eliminates piping to a drain
• Support Hanger Not Required
U.S. Patents No. 8,636,023
April 2020 - Rev 41
ECS EJECTOR
AUTOMATIC AIR VENT
PAV-W
Engineered Corrosion Solutions •11336 Lackland Road St. Louis, MO 63146 •Phone: [phone] •www.ecscorrosion.com

Installation Instructions
Maintenance Instructions
Operating Instructions
A notification from the PAV-WS pressure switch on the bottom of the vent assembly indicates a system pressure
reading due to a failure of the primary float valve, which renders the ECS Ejector Automatic Air Vent inoperable.
1. The ECS Ejector Automatic Air Vent must be inspected annually at minimum.
a. Check the pressure gauge on the bottom of the vent assembly for a system pressure reading.
2. If a system pressure reading is detected the primary vent valve may require service or replacement.
a. While isolation ball valve is in the open position check for air/water leaks.
b. Close isolation ball valve to perform maintenance on the ECS Ejector Automatic Air Vent.
c. While isolation ball valve is in the closed position, inspection the “Y” strainer blockage, clean as necessary.
d. If replacement is required, contact Engineered Corrosion Solutions for replacement parts and instructions.
1. The ECS Ejector Automatic Air Vent is equipped with an isolation ball and a quick connect for easy installation
and servicing (see Figure 2).
2. Install the PAV-W/WS vent assembly at the location provided by the engineering design documents in a level
position at an accessible high point on the sprinkler system where trapped gas can be vented.
3. The contractor must install a ½” outlet (welded or mechanical) to connect the vent assembly to the sprinkler
system.
NOTE: Piping to the vent assembly cannot be installed in a configuration that would trap water and prevent
drainage to the sprinkler system. A water trap impedes the ability of the vent to remove gas from the fire
sprinkler system.
4. When electronic supervision is used, the PAV-WS must be utilized instead of the PAV-W. When connected to the
building alarm system, connect the PAV-WS to an addressable monitor module with an end-of-line resistor
(provided by others) in accordance with applicable national and/or local codes (i.e. NFPA-70 & NFPA 72). (see
Figure 1)
5. Inspection of the vent assembly should be performed after installation and hydrostatic testing of the fire sprinkler
system. Inspection should be performed periodically thereafter in accordance with the applicable national codes,
NFPA codes and standards, and/or the authority having jurisdiction.
NOTE: Patented redundant float design eliminates piping the PAV-W/WS to a drain.
1. Once the fire sprinkler system has been hydrostatically tested, open the isolation ball valve on the PAV-W/WS.
Trapped gas should be expected to immediately vent from the device if the system has been re-filled with water.
2. The isolation ball valve must remain in the open position to allow for venting of any additional trapped gas
remaining in the system that may migrate to the vent location.
3. Plumbing the PAV-W/WS to drain is not required. Occasionally during venting operations a small amount of water
may leak past the primary gas vent valve and collect in the intermediate plumbing. This is considered normal and
not a failure of the valve.
4. Water traps that would restrict operation of the ECS Ejector Automatic Air Vent can be cleared by closing the
isolation ball valve and removing the “Y” strainer plug. Once the water trap has been removed, replace the “Y”
strainer plug and reopen the isolation ball valve.
April 2020 - Rev 42
ECS EJECTOR
AUTOMATIC AIR VENT
PAV-W
Engineered Corrosion Solutions •11336 Lackland Road St. Louis, MO 63146 •Phone: [phone] •www.ecscorrosion.com

FIGURE 1 - Wiring Diagram FIGURE 2 - ECS Ejector Automatic
Air Vent Outline Drawing
FIGURE 3 - ECS Ejector Automatic Air Vent Installed on Sprinkler System
NOTE: Piping to the vent assembly cannot be
installed in a configuration that would trap water
and prevent drainage to the sprinkler system; a
water trap impedes the ability of the vent to
remove gas from the fire sprinkler system.
INSTALLATION NOTES:
1. If monitored by the building fire alarm system,
provide one addressable monitoring module
to monitor the Supervised Ejector Automatic
Air Vent.
2. Connect the Ejector Automatic Air Vent to the
addressable monitoring module.
3. Supervise the circuit using an end-of-line
resistor (EOLR) in accordance with
applicable national and/or local codes (i.e.
NFPA 72).
E.O.L.
To
Next
From Panel / Previous
Addressable Device
Addressable
Monitor Module
4” x 4” Electrical
Junction Box
Wiring Harness Supplied
with Automatic Air Vent
ECS
Automatic
Air Vent
½” Connection to Sprinkler System
must be on top or side of pipe
NOTE: Patented redundant float design
eliminates piping vent to drain.
Gas Discharge Orifice
Primary and Secondary
Gas Vent Valves
½” Connection to
Sprinkler System
½” Isolation Ball Valve
Pressure Gauge
“Y” Strainer with
Ball Valve
5” (127mm)
2” (51mm)
Clear Height Requirement above
System Connection
Quick Connect
April 2020 - Rev 43
ECS EJECTOR
AUTOMATIC AIR VENT
PAV-W
Engineered Corrosion Solutions •11336 Lackland Road St. Louis, MO 63146 •Phone: [phone] •www.ecscorrosion.com

OUR PRODUCTS. YOUR SYSTEMS.
Engineered Corrosion Solutions •11336 Lackland Road St. Louis, MO 63146 •Phone: [phone] •www.ecscorrosion.com
April 2020 - Rev 04
Solu�ons for every environment
WET PIPE SYSTEMSDRY PIPE SYSTEMS
SERVICES
Corrosion control technology
located in the riser room.
Automatic air venting and
nitrogen corrosion control.
Corrosion assessments, pipe
analysis, and long term corrosion
control programs to mitigate future risk.
MONITORING SOLUTIONS
Ensure effective corrosion
control with real time corrosion
monitoring solutions.
Total System Capacity
Air Compressor
Weight
WALL MOUNT SKID
MOUNT
Single System Capacity @ 40 psi(1)
Single System Capacity @ 20 psi(1)
Size (H x W x D)
STAND ALONE W/ SEPARATE
AIR COMPRESSOR
PGEN-3
Integral
540 gal
215 gal
675 gal
36x24x9
115 lbs
PGEN-5
Integral
590 gal
265 gal
950 gal
36x24x9
125 lbs
PGEN-10
Integral
1,120 gal
560 gal
2,000 gal
38x 2 9 x11
175 lbs
PGEN-20
Integral
1,800 gal
950 gal
3,200 gal
57x32x40
420 lbs
PGEN-30
Separate
2,300 gal
1,150 gal
6,500 gal
53x24x9(2)
152 lbs(2)
PGEN-40
Separate
2,880 gal
1,440 gal
11,000 gal
53x24x9(2)
152 lbs(2)
PGEN-50
Separate
4,050 gal
2,025 gal
18,500 gal
76x24x12(2)
300 lbs(2)
PGEN-60
Separate
5,800 gal
2,900 gal
22,500 gal
76x24x12(2)
300 lbs(2)
NOTES:
Corrosion control technology located in the riser room
Dry Pipe System Nitrogen Generators
(1) Single system capacity based on 30 min. fill requirement of largest single sprinkler system; a secondary air compressor with normally closed
isolation valve can be used to meet fill requirement for larger individual systems
(2) Size and weight of nitrogen generator only, does not include separate air compressor
(3) All nitrogen generators include one (1) year manufacturer’s warranty per ECS terms and conditions