Immergas EOLO STAR 24 4E - Gas Valve Calibration

34
4
3
2
1
6
5
42
INSTALLER
USER
MAINTENANCE TECHNICIAN
TECHNICAL DATA
Key:
1 - Coil
2 - Minimum output adjustment screws
3 - Maximum output adjustment nut
4 - Outlet pressure point
Gas valve
5 - Gas valve inlet pressure point
6 - Protection hood
VK 8105 M GAS valve
3.8 GAS VALVE CALIBRATION.
e valve calibration must be carried out when the gas valve or
the P.C.B. is replaced or in the case of conversion to a dierent
type of gas.
To access the calibration phase, proceed as described below
(Par.2.3):
Complete calibration
Before carrying out complete calibration, ensure that
all the requirements indicated in parag.1.21.
No active requests for central heating or D.H.W. pro-
duction must be present and the boiler must not be
in “Stand-by” mode.
Possible adjustments
• Adjustment of boiler nominal thermal heat output.
- Activate the chimney sweep function (Ref. Par. 3.12) in DHW,
making sure that the maximum boiler output is reached (on
the display “99” is to be displayed).
- From the brass nut (Pos. 3 Fig. 34) adjust the boiler nominal
output, observing the maximum pressure values stated in the
tables (Par. 4.1) depending on the type of gas.
- By turning in a clockwise direction the heating potential incre-
ases and in an anti-clockwise direction it decreases.
• Adjust the boiler minimum heat output in the domestic hot water
phase (Fig. 34).
N.B.: only proceed aer having calibrated the nominal pressure.
Adjustment of the minimum thermal input is obtained by opera-
ting on the cross plastic screws (2) on the gas valve maintaining
the brass nut blocked (3);
- press the button 4 (Fig. 30) up to reach the minimum boiler
output (on the display “00” is to be displayed). e pressure to
which the boiler minimum power must be adjusted, must not
be lower than that stated in the tables (par. 4.1) depending on
the type of gas.
N.B.: to adjust the gas valve, remove the plastic cap (6); aer
adjusting, ret the cap.
• Adjustment of the boiler minimum heat output in heating phase.
N.B.: only proceed aer having calibrated the minimum dome-
stic hot water pressure.
To adjust the minimum heat output during the heating phase,
change parameter (5), increasing the value the pressure increases,
reducing it the pressure drops.
- e pressure to which the boiler minimum heat output must be
adjusted, must not be lower than that stated in the tables (Par.
4.1).