Disabled – The First Out is disabled and the M.M. will not display the First Out or take any action if it
fails.
Monitor – The First Out is only monitor, so the M.M. will display if the First Out if it fails but will not
turn the burner off.
Recycle – If the First Out fails the M.M. will turn the burner off and the M.M. will turn the burner back
on if the First Out is no longer failing with no manual reset required on the M.M.
Non–Recycle – If the First Out fails the M.M. will turn the burner off and the M.M. will not turn the
burner back on until a manual reset has occurred on the M.M. even if the First Out is no longer failing.
When using First Out Annunciation with a Mk7 M.M. it is not always necessary to tie in switches to the
burners run circuits as the Mk7 M.M. is fully capable of turning off the burner if the First Out has been
set to Recycle or Non-Recycle. However, local codes may require some First Outs to be tied to the
burner run circuit. In this instance it is good practice to tie in the First Out switches into Terminal 53
(Burner On/Off) as shown in the diagram below.
The reason for wiring the First Out Annunciation into Terminal 53 is because a break in this circuit will
turn off the burner but will not cause a lockout on the M.M. Here, the First Out Annunciation will
appear with what First Out has failed for better diagnosis of the problem. Wiring the First Out
Annunciation into Terminal 54 (Air Proving Switch) for example, will cause the burner to turn off but
the M.M. will lockout on having no air pressure rather than displaying the First Out that has failed.
Figure 2.4.ii First Outs Wiring
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