Alarko SERADENS SRD 20, Инструкция по установке, эксплуатации и обслуживанию

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58
Primary heat exchange
r (see fi g. 35)
● Close the shut-off valves and drain the central
heating circuit of the boiler;
● Switch off the power and gas supply to the
boiler;
● Remove and dismantle the entire burner unit
(see 6.6.1 “Cleaning the condensation module
and burner unit”);
● Remove the gas valve;
● Remove the spring and then the condensate
drainpipe;
● Remove the fi xing springs and then the deliv-
ery and return pipes;
● Remove the support brackets and pull out the
heat exchanger;
● Remove the regulation sensor from the old
heat exchanger and re fi t it together with the
two condensate drainpipes to the new one;
● Replace the heat exchanger and re-assemble
the components following the above proce-
dure in reverse order;
● Switch on the electricity, water and gas sup-
plies and fi ll the system with water. Check for
any leaks from the joints and bleed off any air
from the circuit. Restart the boiler, making sure
that there are no gas leaks;
d
Fig. 1
primary heat
exchanger
flue connection
chamber
steinless steel
pipe coil
ceramic fibre
washer
35