808
Thermo 230 / 231 / 300 / 301 / 350
8 Servicing
8.7.4 Burner, Replacement
NOTE:
The replacement procedure for the burner is identical with
the heater installed or removed.
Perform replacement in accordance with
.
The igniter box operates on high voltage. Prior to re-
placement of burner disconnect electrical connectors
of cable harness in vehicle to avoid lethal accidents.
8.7.5 Igniter Box, Replacement
NOTE:
The replacement procedure for the igniter box is identical
with the heater installed or removed.
Perform replacement in accordance with
.
The igniter box operates on high voltage. Prior to re-
placement of burner disconnect electrical connectors
of cable harness in vehicle to avoid lethal accidents.
8.7.6 Flame Sensor, Replacement
NOTE:
The replacement procedure for the flame sensor is iden-
tical with the heater installed or removed.
Perform replacement in accordance with
.
The igniter box operates on high voltage. Prior to re-
placement of burner disconnect electrical connectors
of cable harness in vehicle to avoid lethal accidents.
8.7.7 Combustion Chamber, Replacement
NOTE:
The replacement procedure for the combustion chamber
is identical with the heater installed or removed.
Perform replacement in accordance with
.
The igniter box operates on high voltage. Prior to re-
placement of burner disconnect electrical connectors
of cable harness in vehicle to avoid lethal accidents.
8.8
First Operation
After heater installation the coolant circuit and the fuel
supply system must be thoroughly bled observing the
vehicle manufacturer’s instructions. During test runs all
coolant and fuel line connections have to be checked for
security and no leakage. Should the heater in operation
enter a fault condition, perform troubleshooting (refer to
Section 5).
NOTE:
Heaters with control unit 1572D:
If the heater performs 5 subsequent attempts to start due
to a malfunction, the heater enters an error lockout and
stops any further attempts to start. This error lockout is
superior to the normal error lockout condition.
The error lockout reset is achieved by switching the heater
on and disconnection of the heater power supply within
120 sec. during run-down.
8.8.1 Water Circuit, Bleeding
NOTE:
Bleeding must always be performed in accordance with
manufacturer’s instructions. For bleeding the circulation
pump must not be switched on.
Set vehicle own heating system to "warm" and replenish
coolant which must consist of at least 30 % anti-freeze
(on glycol base) (protection against corrosion). When
using pure water there will be no protection against
corrosion and due to the lower boiling point of the water
when overheating loss of cooling water may result
requiring continuous replenishment. Additives in the
coolant must not affect metals, plastics or rubber and
leave no deposits.
Then operate engine at increased idle until radiator
thermostat opens. Shut down engine, check coolant level
and replenish as required.
Switch on heater and vehicle heating fan with engine shut
down. After a certain cool-down period the heater must
automatically switch on and control to off. In case of no
restart attempt the temperature limiter on the heater has
responded because the heater has not been bled
properly. Reset temperature limiter (push button on
temperature limiter) and repeat complete bleeding
procedure.
NOTE:
The heater may be equipped with an automatically
resetting temperature limiter. The manual reset is not
necessary.
High voltage!
Danger to life!
Warning!
High voltage!
Danger to life!
Warning!
High voltage!
Danger to life!
Warning!
High voltage!
Danger to life!
Warning!
Summary of Contents for spheros thermo 230
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