Electronic Regulation P.c.b; Full Sequence Control P.c.b - Savio 20/1 MFS User Manual

Servicing instructions
3 turn the c.h. temperature adjustment to its maximum position as
indicated;
4 remove the service access doors (sect. 6.2);
Do not change position of knobs during operations.
5 lower the control panel (sect. 6.2)
6 remove the screw on the pressure test point for measuring outlet
pressure at the gas valve and fit a pressure gauge using a hose
(step 2 at page 19);
7 switch on the main isolator;
8 using a screwdriver, gently adjust the regulation potentiometer
on the electronic regulation p.c.b. for desired pressure;
rotating the potentiometer counter---clockwise reduces the
maximum current fed to the gas moulator and thus reduces the
maximum gas pressure to the burner.
9 refer to the diagram shown here to determine pressure for the
heating output you need;
10 securely close the gas pressure test point.
11 close the appliance;
6.7

Electronic regulation p.c.b.

1 Ensure electricity is switched off at main isolator and remove the
service access door (sect. 6.2);
2 disconnect the wires from the main terminal board " A" .
3 disconnect the connectors " B" ;
4 loosen the screws " C"which hold the circuit board on the con-
trol panel;
5 remove the electronic regulation circuit board;
6 reassemble in reverse order.
To reassemble correctly the electric wires and connectors look at the
wiring diagram in sect. 8.1 or at the diagram stuck on the inner cover
of the control panel.
6.8

Full sequence control p.c.b.

1 Ensure electricity is switched off at main isolator;
2 remove the front panel of the case and lower the control panel
(sect. 6.2);
3 remove the screws " A" ;
4 remove the cover on the full sequence control p.c.b. compart-
ment;
26
rev. 17.09.93
Btu/h kW
78 491
23
71 666 21
64 841 19
58 015 17
51 190 15
44 365 13
37 539 11
30 714
9
23 889 7
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 mbar
0 0,4 0,8 1,2 1,6 2,0 2,4 2,8 3,2 3,6 4,0
C
C
B B B
A
A
ins.w.g.
C
C
A
A
A