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5. If the control does not detect flame by the
end of the trial for ignition, the control
performs a 10 second post-purge. On the
SHW35 CE to SHW116 CE models, the
control will perform another pre-purge and
try to light the burner again. If the burner
does not light after 4 trials, the control will
lockout for 1 hour and then try another set
of 4 trials. On the SHW146 CE the unit will
lockout until manually reset.
6. If the control detects a flame before trial
ignition ends, it begins to modulate the
burner in order to maintain the set point.
7. Once the call for heat is satisfied, the control
will turn off the burner. The fan will remain
on for the 10-second post-purge cycle. The
integrated pump will continue to run for its
respective pump delay time., and then turn
off
8. The integrated pump switched off.
50
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