Gas Valve Adjustment - Baxi Luna HT 1.850 Gebrauchsanleitung

Carry out the following operations in the given sequence:
1) Calibration of the max­imum heat output. Check that the CO
at the max­imum heat output, is the same as that shown in table 1. Otherwise, turn the regulation screw (V)
on the gas valve. Turn the screw clockwise to reduce the concentration of CO
it.
2) Calibration of reduced heat output. Check that the CO
the minimum heat output, is the same as that shown in table 1. Otherwise, turn the offset regulation screw
(K) on the gas valve. Turn the screw clockwise to decrease the concentration of CO
increase it.
pi: Gas supply pressure connection
point
p out: Gas pressure to burner connection
point
pl:
Air signal input from fan
V:
Gas flow adjuster screw
K:
OFFSET adjuster screw
IMportant: If the appliance is being converted from natural gas to propane (LPG), the following operations
must be performed before calibrating the gas valve as instructed above.
• Replace the gas nozzle placed inside the gas valve (flow gas connection).
To perform this operation it is necessary to remove the gas valve by undoing the inlet and outlet connections
and unscrew the nozzle using round-nose pliers.
Check the seal of the gas couplings removed beforehand.
• On the control panel display set ignition power parameters h536 - h541 - h608 - h609 - h610 - h611 -
h612 and h613. The values to be input are given in table 2 or 2.1. The programming methods are described
in chapter 15.
To simplify calibration of the gas valve, the "calibration function" can be set directly on the boiler control panel
by proceeding as follows:
1) Press the keys (2-3) together until the display shows the pointer " " alongside the
6 seconds).
2) Press the keys to set the fan speed at the minimum and max­imum heat output (%PWM);
N.b - to set the minimum and maximum heat output quickly, press the
3) press either of the two
InstructIons pertaInInG to the InstaLLer

14. gas valve aDjustment

keys to ex­it the function.
103
measured on the flue, with the boiler operating
2
and anticlockwise to increase
2
measured on the flue, with the boiler operating at
2
Gas nozzLe
V
Figure 13
and anticlockwise to
2
K
P out
Pi
symbol (about
keys respectively;
912.198.1 - GB