Spheros thermo 231, Руководство по ремонту

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Annex A Thermo 230 / 231 / 300 / 301 / 350
A-2
Heater, Scheduled Maintenance *
The heater should be checked in regular intervals at least
at the beginning of the heating season (point of time when
weather conditions cause increased use of heater).
The maintenance intervals indicated below apply to appli-
cations and requirements typical of busses. Should the
heaters be used in other vehicles or applications, these in-
tervals may have to be adapted, i.e. shortened or exten-
ded.
In these cases, please contact your Spheros partner
charge.
Check / Maintenance Important Notes Check Result Measured Values,
Maintenance / Repair
performed
i.O. nicht
i.O.
1. Electrical connections
a) Disconnect electrical connectors to cable harness,
inspect for oxidation, spray and reconnect after performing
step 5.
b) Inspect fuses for oxidation and/or check transitionresistances.
Use suitable contact
spray, e.g. special
contact spray
(order no. 101322).
2. Heat exchanger
a) Inspect paint for dark stains of burn (local overheating).
b) Check for signs of leakage.
c) Clean heater exterior and interior.
If necessary investigate
reason for overheating
(e.g. water circuit).
Check temperature
limiter.
3. Fuel system
a) Check fuel lines and connections for leaks.
b) Replace fuel filter cartridge with gasket.
c) If existing, open fuel shut-off valves.
d) Fuel pump
e) Replace fuel filter screen with gaskets in pump.
Check for leak-proof
connections in fuel supply
and return!
Retighten joints and hose
clamps.
Replace pump and lines
every 5years.
4. Burner head
a) Check combustion air inlet for contamination.
Swing burner head open:
b) Check cover for damage
c) Check housing interior for accumulation of fuel caused
by leaks.
d) Clean viewing glass of flame sensor.
e) Check igniter electrodes for condition.
f) Replace atomizer nozzle.
Replace damaged cover
Replace bent electrodes.
When coked reduce
replacement interval for
fuel filter.
5. Exhaust system
a) Check exhaust line for contamination and clean as required.
b) Remove combustion chamber from heat exchanger, inspect both
components for damage and contamination and clean or replace
as required.
c) Insert combustion chamber and mount burner head. Check for secure
connection to heat exchanger.
d) Restore electrical connections.
6. Water system
a) If installed, clean water filter.
b) If installed, open water shut-off valves.
7. Functional checks
a) If installed, open shut-off valve in the return line.
b) Check heater function.
c) Check for smoke emissions in run-down; replace nozzle if required.
after at least 10 min. of
heating operation.
* For rail applications consider the Maintenance Record RAIL 9008722B.