Carrier 50FF/FC 020-093 Installation, Operation And Maintenance Instructions page 67

14 - MAINTENANCE
14.3.10 - Gas burner
Only qualifi ed staff are allowed to undertake maintenance
tasks or resolve a breakdown.
Pay attention to the temperatures of some components
after operation. They could be very high (exchanger, fl ue
exhaust, etc).
Hazard: Never use a naked fl ame whilst checking the
burner. Never store fl ammable material in the machine
room.
During the maintenance, the user must always strictly follow the
instructions given in all the chapters of this brochure, as well as on
the manufacturer's (APENGROUP) installation and maintenance
brochure for the burners in the PCH series, supplied with the unit.
The maintenance and checking of the combustion must be
performed in compliance with the legislation in force.
Any modifi cation or change in the material must be undertaken with
the manufacturer's consent; the replacement of a faulty component
for another non-compliant component could present a hazard for
which CARRIER could not accept liability.
To keep the machine effi cient and guarantee a long lifetime of the
heater, it is advisable to run some inspections every year, before
turning it on for the season:
1) check the status of the start-up electrodes, detection electrodes
and pilot fl ame;
2) check the status of fl ue exhaust and air intake ducts and
terminals;
3) check the status of the venturi;
4) check and clean the exchanger and burner;
5) check and clean the water trap
6) check the intake pressure at the gas valve;
7) check the function of the fl ame monitoring equipment;
8) check the safety thermostat(s);
9) check the ionization current.
Note: Operations at points 1, 2, 3, 4 and 5 must be performed after
disconnecting the heater from the electrical mains and closed the
gas supply. Operations at point 6, 7, 8 and 9 must be done with
the heater on.
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