Technical documentation
Technical documentation
STEM@ ed 06/01
12
EOLO MAIOR @
GAS ADJUSTMENTS
Max and minimum gas pressure adjustments
can be made by means of the gas valve
respecting the values shown on the tables
relating to each boiler for the type of
corresponding gas.
Measurement is made using a pressure gauge
connected to the outlet of the gas valve (6)
and to the positive pressure point located on
the upper part of the sealed chamber.
- VALVE VK 4105 M
(with yellow protection cap)
Minimum pressure adjustment
- After interrupting the power supply to the
modulation coil
(*)
, turn screw "3"
clockwise to increase pressure to the burner
and anticlockwise to decrease it.
Maximum pressure adjustment
(operation to be performed after minimum
pressure adjustment)
- Draw d.h.w. after setting the temperature
switch at maximum.
Turn nut ”4” clockwise to increase pressure
to the burner and anticlockwise to decrease
pressure.
1) Modulation coil
5)
Yellow
protection cap
2) Coil pin
6) Gas valve outlet press. point
3) Min. output adjust. screw 7) Valve inlet press. point
4) Max. output adjust. screw 8) Air press. point hose connector
- - VALVE VK 4105 M-M with integrated flanges
(with transparent protection cap)
Maximum pressure adjustment
- Draw d.h.w. after setting the temperature
switch at maximum.
Turn nut ”3” clockwise to increase pressure
to the burner and anticlockwise to decrease
pressure
Minimum pressure adjustment
(operation to be performed after maximum
pressure adjustment)
- After interrupting the power supply to the
modulation coil
(*)
, turn screw "4"
clockwise to increase pressure to the burner
and anticlockwise to decrease it.
1) Modulation coil
5)
Transparent
protection cap
2) Coil pin
6) Gas valve outlet press. point
3) Min. output adjust. screw 7) Valve inlet press. point
4) Max output adjust screw 8) Air press. point hose connector
(*) only on boilers featuring B&P modulation boards
,when the modulation coil is detached, LEDs H1
(yellow) and H2 (red) flash alternately
