Baxi Slim HPS 1.80 Installer's Instructions page 55

– Replace the valve.
The boiler reaches the set temperature,
but the radiators do not heat up.
– Make sure there are no air bubbles in the
system, if so purge from appropriate air
vents.
– The room stat is too low or must be
replaced if faulty.
– The connections of the room stat are not
correct (make sure the cables are placed
on terminals 6 and 7 of the boiler termi-
nal board).
Boiler operates only at nominal pressure
and does not reduce pressure.
– Check whether there is voltage at both
ends of coil.
– The coil has a break in the winding; replace.
– The rectifier card that supplies the coil is
interrupted; replace.
– There is no differential on setting of the
two contacts of the regulating thermo-
stat; replace.
– Check calibration of reduced pressure
adjusting screw of coil assembly.
The boiler gets dirty easily causing scaling
of cast iron exchanger and cutting off of
smoke stat.
– Check that the flame of the main burner
is well regulated and that gas consump-
tion is proportional to boiler output.
– Poor ventilation of premises where boiler
is installed.
– Flue with insufficient draught or not mee-
ting requirements.
– The boiler works at too low temperatu-
res. Adjust the boiler thermostat to
higher temperatures.
Thermostat switches boiler back on with
too high temperature difference.
– Replace regulating thermostat since it is
out of calibration.
IT
RUS
FR
ENG
55