SIME FORMAT WALL HUNG BOILERS
MODEL 34i AND MODEL 34e
REF: INSTALLATION INSTRUCTIONS 19/02/04
18
Fig12
steady orange indicates a faulty CH sensor, and flashing orange indicates low
water pressure. The red indicates lockout. Other features available of the PCB
are:-
b) POT ACC trimmer, (Fig.12), used to set the ignition power
from min. to max.
c) MET-GLP Bridge (Fig.12), used to set the PCB for either
NG or LPG usage.
4.1 Gas Valve
a) The SIT 845 SIGMA is fitted with a continuously modulating
Zero regulator, having two definite pressure settings. These
pressures, shown in Table 4 for both Natural Gas and Propane
usage, are factory set for the gas supply to which the boiler is
to be connected. There should not be any need other than the
field conversion from one gas to another or the exchange of a
gas valve, for these to be adjusted. In the case of the above
exceptions, or if it is obvious that adjustment is necessary, the
following procedures are to be followed. It is important to
note that, the maximum pressure is to be set first, followed
by the minimum, to the pressure indicated in Table 4 for the
gas used. All adjustments are made with the CH adjusted set
fully clockwise, and the temperature knob at maximum.
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