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With good PID control the user should set both P-BAND and INTEGRAL to provide the wanted per-
formance yet avoid large firing rate changes.
While THERMAL SHOCK is active, O2 trim is disabled.
ADJUST RATIO PROCEDURE
Adjust ratio is used after the profile has been commissioned and all setpoints have been entered.
Adjust ratio mode is used only for modifying an existing profile from low fire (P03 through P23)
through high fire. No new setpoints can be entered with adjust ratio.
It is not possible to modify the close (P00), purge (P01) or ignition (P02) positions using adjust ratio
mode. All other commissioned setpoints can be modified in any order.
It is not possible to modify any servo or VFD position so that it is higher than the high fire setpoint.
It is also not possible to modify a master servo position so that it is higher than the leading adjacent
setpoint or lower than the trailing adjacent setpoint.
Entering adjust ratio mode:
To enter adjust ratio mode, the burner may be on or off. The user presses the C-MODE key located
on the keypad. If not currently enabled the system directs the user to the passcode setup screen where
the user must enter the necessary adjust ratio passcode level 2. If the user enters the commissioning
passcode while the burner is on, adjust ratio mode is entered. If entered properly or if previously
entered the LED indicator at the C-MODE key will illuminate and the display will indicate:
With the control in the burner off (STANDBY) position, a profile must be selected to view all the set-
points for that profile. If no profile is selected only P00 (shown as a00) will be displayed.
Note: Profile is selected through the action of the flame safeguard control following a burner on
command.
If, while in adjust ratio mode and after burner on command is issued attempting to move to a01, there
is no commissioning data for this profile, the display will indicate:
At this point the user can and should exit Adjust Ratio mode. See exiting adjust ratio mode.
If the burner is commanded on and there is no profile selected waiting for the flame safeguard to turn
on the display will indicate:
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