Rheem TRITON GHE80SS Service Training Manual page 26

Rheem TRITON TM
Service Manual
SEQUENCE OF OPERATIONS
End of Heating Cycle
Once the set point is reached,
the gas valve is closed and the
control enters the post purge
cycle.
Post Purge
The blower will run the post
purge cycle to purge the burner
and venting system of all com-
bustion gases. The word Post
Purge will be in the LCD display
window.
Stand-By Mode
The control will enter the idle
state while continuing to monitor
the internal tank water tempera-
ture and the state of other sys-
tem safety devices.
The word Standby will be in the
LCD display window.
26
Post purge expels latent heat
and combustion gases.
When the post purge cycle is
complete, the blower is de-ener-
gized and will stop.
If the temperature drops below
the set point value minus differ-
ential, the control will automati-
cally call for heat and repeat the
entire operating cycle.
If there is a presence of flame
10 seconds after the gas valve
relays close, you will get an error
code of A019 Flame Out To Late.
If the proof of fan pressure
switch does not close, you will
get an error code A006, post
purge.