30
•
It is not possible to modify the close, purge or ignition positions (P0, P1 or P2 respectively). For
this, commission ratio mode must be used.
Entering Adjust Ratio Mode
To enter adjust ratio mode, turn the burner on. Once the burner begun its start up sequence, press the
key labeled
COM
(ENTER) and obtain the supplier pass code value using the
UP/DOWN
keys.
Once the correct pass code value has been obtained, press the key labeled
COM
(ENTER). Alterna-
tively, the adjust ratio pass code may be used if the burner is on or off.
If the entered pass code was correct, ‘A n’ will be seen on the display in addition to the servomotor
positions for the servos being used for the selected profile, where n is the number of the setpoint cur-
rently under adjustment.
Using Adjust Ratio Mode
WARNING: Use extreme care while commissioning the system. While operating in adjust
ratio mode the safety of the system is the sole responsibility of the commissioning engineer.
Incorrect positioning of either fuel or air could cause a hazardous situation to occur.
•
To adjust the position of a servomotor, use the
LEFT/RIGHT
scroll keys to point to the servo-
motor to be adjusted and then use the
UP/DOWN
keys to move the servomotor. Depending on
the profile selected, some servomotors may not be available.
•
To change the setpoint being modified, use the
LEFT/RIGHT
scroll keys to point to the profile
point number ‘An’ and use the
UP/DOWN
keys to adjust the value.
Each setpoint in the profile is referred to with a letter and number.
No.
Name
Comments
A0
Close
The close setpoint cannot be altered in adjust ratio
A1
Purge
The purge setpoint cannot be altered in adjust ratio mode.
A2
Ignition
The ignition setpoint cannot be altered in adjust ratio mode.
A3
Low fire
The close setpoint cannot be altered in adjust ratio mode.
Ax
High fire
High fire setpoint, which was the last setpoint entered
(max P24)
The procedure for modifying a setpoint is as follows:
1.
Enter adjust ratio mode. ‘A n’ is displayed in addition to the servomotor positions, where n is the
number of the setpoint which is closest to the current firing position.
2.
Use the
LEFT/RIGHT
scroll keys to point to the profile point number ‘An’ to be adjusted and
use the
UP/DOWN
keys to move to the setpoint in the firing range to be altered.
3.
Wait for the ‘A n’ display to stop flashing and modify the fuel and air motors as required.
4.
If the modified positions are not required, press the AUTO MAN (NEXT) key to return the
motors to their original positions or use the scroll keys to select a different setpoint.
5.
Press the
COM
(ENTER) key to store the new motor positions for the current setpoint.
6.
Repeat steps 2-5 as required. Each time step 5 is completed, the new positions will be stored per-
manently.
7.
Leave adjust ratio mode.
If the ‘A n’ display is flashing, it will not be possible to adjust the position of any of the motors.
This may be for one of the following reasons:
RUN MODE, BURNER ON
SUPPLIER PASSCODE
COM
COM
