813
Thermo H plus
8 Repairs
8.6
Start-up after burner or
heater installation
The fuel system must be bleeded after burner installation.
The coolant circuit and the fuel system must be bleeded
after heater installation.
The vehicle manufacturer specifications must be
observed.
Coolant and fuel connections must be checked for leak-
tightness and tight fit during the test run.
If a malfunction occurs during heater operation, trouble
-
shooting must be performed (see chapter
).
8.6.1 Bleeding the fuel system
The whole fuel supply system including the fuel filter must
completely filled with fuel before initial start-up.
ATTENTION:
Never use the fuel pump to fill / bleed the fuel system!
ATTENTION:
In the event no fuel comes to the fuel pump during
initial start-up (dry run), there is a risk that the fuel
pump will be damaged!
8.6.2 Bleeding of the coolant circuit
NOTE:
The coolant circuit must be principally bleeded according
to the manufacturer specification.
Risk of scalds if coolant temperature is increased.
The Aquavent 5000 (U4814) and Aquavent 6000S
(U4855) circulating pumps may only be switched on for
bleeding, after dry operation can be excluded.
The Aquavent 5000S (U4854) and Aquavent 6000SC
(U4856) circulating pumps may even in dry operation be
switched on for bleeding.
Adjust the vehicle heating system to "warm" and refill
coolant.
As soon as it is confirmed that the vehicle engine is filled
with coolant, run vehicle engine with increased idle speed.
Once the cooler thermostat opens, switch the vehicle
engine off and check the coolant level. Refill coolant as
needed.
While the vehicle engine is switched off, switch on the
heater with the circulating pump and the vehicle heating
fan.
After the engine motor cooled down, the heater must auto
-
matically start and stop as soon as the upper switching
threshold is reached.
If the heater does not start automatically, it must be veri-
fied, whether the heater overheating protection is trigge-
red and the heater is in fault-lockout state.
) and repeat the bleeding
process.
Risk of scalds
Caution!
Summary of Contents for Thermo H 160
Page 47: ...memos...
