Saunier Duval THEMA F 23 E, Инструкции по установке и обслуживанию

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17
SETTINGS
CHANGING GAS TYPE
Gas valve setting
All boilers are tested and factory set during manu-
facture. Should it be necessary to reset a gas valve,
for example after replacement, proceed as follows:
• Shut down boiler.
• Connect a suitable pressure gauge as described
in '
Commissioning
'.
Maximum setting
• Remove one electrical connector from the
modulating gas valve coil.
• Turn the domestic hot water
temperature adjuster to maxi-
mum setting.
• Remove the protective cover
from the gas valve adjuster.
Using a 2 mm Ø rod, press in the
spindle in the middle of screw
M,
see diagram 25.
• Turn nut '
B
' to obtain the de-
sired pressure, see technical
data.
Minimum setting
This must be done AFTER the maximum setting.
• Hold not B to prevent from turning, turn nut '
A ' to
obtain the desired pressure, see technical data.
After adjustment, refit the cover to the gas valve
adjuster and refit electrical connector.
Bypass
The
THEMA F 23 E
has a built-in bypass. This must be
adjusted according to the requirements of the sys-
tem, refer to the flow rate pressure curve (
diagram
3 ). The boiler is supplied with the built-in bypass
open a half a turn. It is adjusted by turning the by-
pass screw (
a ), see diagram 26 . Turn the screw
clockwise to close the bypass.
When using thermostatic radiator valves (TRV's), it
is recommended that an additional, adjustable
bypass of 15 mm minimum diameter is fitted be-
tween the flow and return of the heating circuit,
see diagram 6 . Any bypass must be fitted before
system controls.
PCB Settings
The PCB on the Thema F 23 E can be set to operate
in different ways to suit individual installations. The
dip switch SW1,
see diagram 27
, should be set as
follows:
1 - OFF 4 - OFF
2 - ON 5 - OFF
3 - OFF 6 - OFF
Should it become necessary to change the gas type, a modification kit will be required.
This modification must only be carried out by a suitably qualified engineer.
Conversion: Natural Gas (G20) to G30/G31 Part No. 86161
Reg 013
a
Diagram. 26
Diagram. 27
Reg 055
1 2 3 4 5 6
SW1
ON
DIP
Mec 121
A
B