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EA122A
OPERATION • SERVICE
The EA122A operates as follows:
Opening the air vent (turning valve body counterclock-
wise) exposes the EA122A 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
CAUTION
!
The EA122A may be hot due to system temperature
extremes. Use caution when adjusting vent to pre-
vent burning hands.
Dirt may collect in the seat area of the air vent float
assembly, causing the vent to malfunction. Clean the vent
periodically to prevent this problem.
NOTE: The EA122A may be serviced without depressuriz-
ing 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 up the black cover
assembly. See Fig. 5.
3. Carefully clean any dirt or debris from the seat area.
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 EA122A by turning the air vent body
counter- clockwise to the open position. Use hands only. See
Fig. 4.
air in the vent chamber and the float rises. This closes the
vent seat. When additional air enters the vent chamber, the
operation 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 EA122A from the system, allowing
service.
9. Make sure the red vent cap is tightened all the way
to the stop position for proper leakage guard operation.
Use hands only to tighten.
Fig. 5—EA122A construction.
BLACK COVER
ASSEMBLY
O-RING
SEAT AREA—
MAKE SURE
AREA IS FREE OF
DIRT AND DEBRIS.
4
Operation
Service
RED VENT CAP
WITH LEAKAGE GUARD
VENT LEVER
SPRING
FLOAT
CONSTRUCTED
FOR EASY, IN-LINE
SERVICE.
SHUTOFF IS
BUILT-IN.
NO DRAIN-DOWN
REQUIRED.
JUST TWIST AND YOU'RE READY
TO SERVICE! TWIST AGAIN AND
YOU'RE BACK ON LINE.
M5493
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