Submittal Sheet

Operation
The EA79 operates as follows:
Opening the air vent (turning valve body counterclock-
wise) exposes the EA79 to the system. Water and air may
enter the vent chamber. The float will fall through any air in
the chamber. This opens the vent seat.
The red vent cap allows air to pass through the open vent.
As the air is released through the vent cap, water replaces the
air in the vent chamber and the float rises. This closes the vent
seat. When additional air enters the vent chamber, the opera-
tion repeats.
If the vent seat remains open, water will rise through the
vent and cause the swelling disks inside the red cap to close
off the vent. Closing the air vent (turning valve body clock-
wise) isolates the EA79 from the system, allowing service.
Service
CAUTION
The EA79 may be hot due to system temperature
extremes. Use caution when adjusting vent to pre-
vent burning hands.
The EA79 may become accumulated with dirt in the seat
area of the float assembly, which may cause the vent to
malfunction. Periodic cleaning is recommended to prevent
the vent from malfunctioning.
NOTE: The EA79 may be serviced without depressurizing or
draining the system.
To clean the seat area, proceed as follows:
1. Turn the vent body clockwise to the closed position,
isolating the vent from the system. See Fig. 4.
2. Remove the float assembly by unscrewing the outer ring
at the top of the body and lifting the black cover assembly
up. See Fig. 5.
3. Carefully clean the seat area of any dirt or debris.
CAUTION
Do not bend spring on float assembly or damage to
the vent may result.
4. Carefully clean any dirt or debris from inside the vent
chamber.
5. Replace the float assembly, making sure that the O-ring is
seated properly. See Fig. 5.
6. Replace black cover assembly on air vent body.
7. Using hands only, replace outer ring, turning until
handtight.
8. Operate the EA79 by turning the air vent body counter-
clockwise to the open position. Use hands only. See
Fig. 4.
9. Make sure the red vent cap is tightened all the way to the
stop position for proper operation. Use hands only to
tighten.
2
M6098
SAFETY CONNECTION FOR PIPING
BETWEEN VALVE DISCHARGE AND DRAIN
EA79 AIR VENT
USE WRENCH TO
TIGHTEN HEX SECURELY.
INSTALL EA79 AT HIGH POINT IN SYSTEM.
Fig. 3—Install the EA79 at high point in system.
Installation
1. Fit EA79 vent in piping at a location as specified in the
Location section.
2. Turn EA79 until vent fits tightly on piping. Use a wrench
to securely tighten hex.
3. If safety drain connection is desired, install a pipe between
vent discharge and drain using Q122A1001 Safe Waste
Connector.
4. Make sure that the red vent cap is securely tight, and that
the valve is in the closed position by turning vent body
clockwise. See Fig. 4. Use hands only to avoid damaging
the vent.
5. With the valve in the closed position, flush the system as
required to remove dirt, debris and contaminants.
6. Fill the system with the appropriate solution.
7. Operate the EA79 by turning the air vent body counter-
clockwise to the open position. Use hands only. See
Fig. 4.
8. Make sure the red vent cap is tightened all the way to the
stop position for proper operation. Use hands only to
tighten.
Fig. 4—Turn vent body counterclockwise to open
or clockwise to close.
M6099
CLOSED
OPENED
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