Thermo 230 / 231 / 300 / 301 / 350
8 Servicing
801
8.
Servicing
8.1
General
This section describes the servicing procedures allowed
on the heater when installed.
8.2
Heater Servicing
As long as the heater is in operation or in run-down the
battery main power supply must not be disconnected to
prevent the heater from overheating by response of the
overheat protection.
When performing long time repairs on the heater its
removal is appropriate.
After working on the heating circuit replenish with a
coolant mix prepared with water and anti-freeze and
bleed circuit afterwards according to manufacturer’s
instructions.
8.3
Vehicle Servicing
CAUTION
In the vicinity of the heater a temperature of 110 °C must
under no circumstances be exceeded (e.g. during paint
work on the vehicle).
8.4
Heater Test Run
The heater must not be operated, not even with the timer,
in enclosed areas like garages or workshops not equipped
with exhaust ventilation facilities.
8.5
Maintenance
To ensure functional reliability of the heater the following
maintenance must be performed:
•
check combustion air inlet and exhaust outlet for
contamination and clean as required.
•
outside the heating season the heater should be
operated with the vehicle engine cold approximately
every four weeks for 10 minutes setting the heating
system to "warm". This avoids difficulties in the
start-up.
•
at least once a year, in case of contaminated fuel
more often, the fuel filter or filter cartridge as well as
the filter screen of the fuel pump must be replaced to
avoid malfunctions.
•
at least once a year the heat exchanger must be
cleaned inside.
•
Valid for application 350.190:
The cleaning of the heat exchanger is to be accom-
plished twice per heating season.
•
in case of leakage the fuel pump and the fuel lines
must be replaced immediately, otherwise every 5
years.
•
the heater should be checked in regular intervals by a
Spheros service agent, the latest before the beginning
of the heating season (refer to Annex A "Scheduled
Maintenance").When the heater is operated in rail ve-
hicles, mainte-nance chart / test certificate item
no. 90 087 22B is to be used.
8.5.1 Inspection and Attachment of the Exhaust
Muffler (only heaters from year of
production 1996 and up to production
date 1996, calendar week 36; 3G......)
NOTE
If the exhaust muffler is already secured with a sheet
metal screw, the following procedure need not be per-
formed.
General
The exhaust muffler of heaters manufactured from the
beginning of 1996 up to a manufacturing date of 1998
(calendar week 36; 3G.......) (for year or date of production
refer to identification label) the exhaust muffler may get
loose or lost under certain circumstances. Therefore an
inspection for proper attachment of the muffler should be
performed.
Heaters manufactured
from beginning of 1996
up to 1998, calendar
week 36; 3G......)
Identification
label
Exhaust muffler
Summary of Contents for thermo 231
Page 2: ......
Page 10: ...1 Introduction Thermo 230 231 300 301 350 104 Page empty for notes...
Page 26: ...4 Technical Data Thermo 230 231 300 301 350 404...
Page 50: ...7 Circuit Diagrams Thermo 230 231 300 301 350 712...
Page 72: ...10 Packaging Storage Shipping Thermo 230 231 300 301 350 1002 Page empty for notes...
Page 73: ...Thermo 230 231 300 301 350 Annex A A 1 Annex A Scheduled Maintenance...
