Honeywell EA79 - Manual (Page 4)

£A79__________________
OPERATION ® SERVICE
Operation
The EA79 operates as Ibllows:
Opening the air vent (Lurning valve body counterclock­
wise) exposes tiie EA79 to the system. Water and air may
enter the vent chamber. The float will fall through any air in
the cliambcr. This opens the vent scat.
The red ven t cap aliows air to pass through the open vent.
As the air is released through tlie vent cap, water replaces
tiieairin the vent chamber and the floatrises. This closes the
vent seal. 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 theEA79 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 bunting hands.
The EA79 may become accumulated with dirt in the seat
area of the float assembly, which may cause itie 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 Lhe body and lifting up the black cover
assembly. See Fig. 5.
3. Carefully clean the scat area of any din or debris.
i\
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
hand tight.
8. Operate the E A79 by turning the air ventbody 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 Slop position for proper leakage guard operation.
Use
hands only to tighten.
Fig. 5—EA79 construction.
■ OUTER RIWG