Settings; Changing Gas Type - Saunier Duval SYLVA FF 24 E Installation And Operating Instructions Manual

SETTINGS

Gas valve setting
All boilers are tested and factory set during
manufacture. Should it be necessary to reset a gas
valve, for example, after replacement, proceed as
follows:
Shut down boiler.
Minimum setting
Remove one electrical connector from the
modulating gas valve coil, see diagram 19.
Connect a suitable pressure gauge as described
in 'Commissioning'.
Turn the OFF/Summer/Winter switch to the
'Summer' position.
Turn the domestic hot water temperature adjuster
to maximum setting.
Remove the protective cover from the gas valve
adjuster.
Turn nut 'A', see diagram 19:
CLOCKWISE: To increase the pressure.
ANTICLOCKWISE: To decrease the pressure.
Maximum setting
Reconnect the electrical connector removed
from the modulating gas valve coil.
Remove the protective cover from the gas valve
adjuster.
Turn nut 'B', see diagram 19:
CLOCKWISE: To increase the pressure.
ANTICLOCKWISE: To decrease the pressure.
After adjustment, refit the cover to the gas valve
adjuster.

CHANGING GAS TYPE

Should it become necessary to change the gas
type, a modification kit comprising injectors and
factory set gas valve will be required. This
16
Bypass
When using thermostatic radiator valves (TRV's), it is
essential that a separate, adjustable bypass of 15
mm minimum diameter is fitted between the flow
and return of the heating circuit, see diagram 6. Any
bypass must be fitted before system controls.
MODULATING COIL
Diagram 19
modification must only be carried out by a suitably
qualified engineer.
85820 C 10/97