Technical data

INSTALLATION & SERVICING INSTRUCTIONS
g Unscrew the union nut of the inlet service cock.
h Remove lead from piezo generator. Remove three screws from the piezo generator bracket.
i Remove two screws securing the injector manifold to the base of the boiler, remove injector manifold
and gas control valve.
j Turn gas control valve anti-clockwise to unscrew it from the injector manifold, remove gas inlet pipe
from gas control valve.
k Reassemble in reverse order (see
Section 9.1.8). Note that the earth wire should be connected
before the electrical plug.
l Light boiler and check for gas soundness. Check for correct operation of the gas control valve, and
adjust the burner pressure to suit the system requirements.
9.2.6 Replacement of Boiler Thermostat
a Remove the split pin from the thermostat phial pocket, withdraw spacer and thermostat phial.
b Unclip the thermostat capillary from the side of the boiler.
c Remove the thermostat knob by pulling off.
d Remove the outer two screws from the front of the thermostat control box, slide the control box
forward.
e Carefully note the positions of the electrical connections to the boiler thermostat, detach the leads
from the thermostat.
f Remove the two thermostat mounting screws, remove the thermostat.
g Reassemble in reverse order. The thermostat should be positioned so that the capillary exits from
the right hand side. The phial and spacer should be located as in
Figure 15 .
Page 24
9.2.7 Replacement of Limit Thermostat
a Remove combustion chamber door ( see
Section 9.1.2).
b Remove attic fixing screw and remove attic by pulling forward.
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