A.O. Smith 3400 - Manual (Page 56)

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OPERATION BUTTON
The operation button displays the Burner Control running
operation, including setpoint and firing rate values. From this
page the user can change setpoints, manually control the
boiler’s firing rate, manually turn pumps on, view annunciation
information, and switch between hydronic heating loops (Central
Heat), as shown in Figure 66. If a password is required to change
any of the settings on this page, the user can press the Login
button to enter the password.
Annunciation information is shown in Figure 67 and Figure 68.
To see additional detail about a lockout or alert, touching on the
lockout or alert in the list expands the view of that lockout or alert,
as shown in Figure 62 on Page 55 and Figure 63.
FIGURE 63. EXAMPLE OF ALERT SHOWN
FIGURE 64. CONTROL EXPANDED LOCKOUT DETAIL
FIGURE 65. CONTROL EXPANDED ALERT DETAIL
FIGURE 66. HYDRONIC OPERATION PAGE
FIGURE 67. PROGRAMMABLE ANNUNCIATION