Changing Gas Type - Baxi PRIME HT 240 Installers And Users Instructions

Proceed as follows to calibrate the gas valve.
1) Calibrate maximum thermal power. With the boiler operating at maximum thermal power, check that the value for CO
measured in the flue corresponds to that specified in table 1 (a-b-c). If necessary, turn the adjuster screw (V) on the
gas valve. Turn clockwise to reduce the CO
2) Calibrate minimum thermal power. With the boiler operating at minimum thermal power, check that the value for CO
measured in the flue corresponds to that specified in table 1 (a-b-c). If necessary, turn the adjuster screw (K) on the
gas valve. Turn clockwise to increase the CO
Pi:
Gas supply pressure measurement point
P out:
Gas feed to burner pressure measurement point
P:
Offset pressure measurement point
Pl:
Air signal input from fan
V:
Gas flow adjustment screw
K:
Offset adjustment screw
16.1 ACTIVATING THE CALIBRATION FUNCTION
Proceed as follows to enter "calibration function" on the boiler control panel and calibrate the gas valve.
1) Turn the control knobs 6 and 7 (figure 1) fully anti-clockwise to their minimum positions as shown in figure 18A.
2) Starting in this position, quickly turn control knob 7 twice consecutively clockwise through about a
in figure 18B.
NOTE: LEDs 2 and 3 (figure 1) flash alternately and the display alternates the message "SF" and the boiler output
temperature about every five seconds (figure 19).
3) Now turn knob 6 to adjust fan speed to a setting between minimum thermal power (0%) and maximum thermal power
(100%).
NOTE: In "calibration function", the display alternates between the message "P" and the boiler output tempera-
ture about every 5 seconds (figure 20).
4) Calibration function remains active for 20 minutes. To exit "calibration function" before this time simply turn control
knob 7 (figure 1).
NOTE: This function is interrupted if the central heating delivery temperature reaches its MAX. SETPOINT.

16. CHANGING GAS TYPE

level or anti-clockwise to increase it.
2
level or anti-clockwise to reduce it.
2
22
INSTRUCTIONS FOR THE INSTALLER
Figure 17
2
2
/ turn as shown
1
4