Wega EVD Use And Maintenance Manual

TECHNICIANS' manual 31 of 100
5.8.4 Gas system connection
To adjust the gas proceed as follows:
1. Turn on the gas system.
2. Remove the locknut (A) and loosen the adjustment screw
(B) by turning it twice.
3. Turn the regulator pin (C) in order to have the maximum
openingfortheowofgas.
4. Wait for the pressure in the heating unit to reach 1.4 bar
(see the heating unit pressure gauge).
5. Turn the regulator pin (C)clockwiseuntiltheburnerame
is barely visible (pilot ame) but sufcient to keep the
thermocouple active (see the data in the Gas table): check
theminimumpressureviaagaugelocatedonthetting
(D).
6. Wait until the heating unit pressure reduces to 1 bar (see
the heating unit pressure gauge).
7. Turn the adjustment screw (B) by screwing it in a clockwise
directionuntiltheameisatitsmaximum.
8. Tighten the locknut (A) to lock the regulator screw in place
(B).
9. Wait until the operating pressure in the heating unit -
which is shown on the machine's pressure gauge - reaches
the working value of around 0.11-0.13 MPa (1.1-1.3 bar).
C
D
A
B
If you would like to increase or decrease the operating pres-
sure in the heating unit, proceed as follows:
TO DECREASE PRESSURE
Set the minimum to 0.09 MPa (0.9 bar) and the maximum
to 0.13 MPa (1.3 bar) and you will obtain a pressure in the
heating unit of approx. 0.10-0.12 MPa (1.0-1.2 bar).
TO INCREASE PRESSURE
Set the minimum to 0.11 MPa (1.1 bar) and the maximum
to 0.15 MPa (1.5 bar) and you will obtain a pressure in the
heating unit of approx. 0.12-0.14 MPa (1.2-1.4 bar) [this
value is the maximum recommended pressure limit].
To check the pressure at the inlet of the injector, connect a
pressure gauge to the connection (D).
The gas system is useful for heating the water
in the heating unit. It does not, except in spe-
cial cases, substitute the electrical heating sys-
tem. Machines with levers can run with electric or gas.
For models equipped with a knob (E), the gas
can be adjusted by rotating the same knob (E)
clockwise to increase the pressure and anti-
clockwise to decrease the pressure.
E

Wega EVD Specifications

General

Brand	Wega
Model	EVD
Category	Coffee Maker
Language	English