Connection To The Vehicle Cooling System - Spheros Thermo 230 Notice De Montage

Thermo 230/300/350
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Connection to the vehicle cooling system

The heater is to be connected to the vehicle cooling system in
accordance with Figures 1, 2 and 7. The system must contain at least
10 litres of coolant. A minimum of 20% of a good quality antifreeze
should be maintened in the heating circuit of the heater at all times.
Basically the water hoses supplied by SPHEROS should be used. If this
is not the case, the hoses must comply with DIN 73411 requirements as
a minimum. The hoses are to be routed without any kinks and - for
proper venting of the heater - in an upward pitch, if possible. Hose
connections must be secured against slipping off by means of hose
clamps.
NOTE:
The specified tightening torques of the hose clamps used must be
adhered.
In the vehicle cooling system, or in a separate heating circuit, only pres-
sure control valves with an opening pressure of min. 0.4 bar and max.
2.0 bar may be used.
Before the heater is started up for the first time, or after the coolant has
been replaced, it must be ensured that the cooling system is properly
bled. Heater and piping should be installed in such a way that static
bleeding of the system is ensured.
Proper bleeding action can be recognised by the nearly silent operation
of the circulating pump. Insufficient bleeding can result in tripping of the
resettable temperature limiter when the heater is operating.
In the case of circulating pump U 4851 / Aquavent 6000C the circulating
pump will be automatically deactivated approx. 10 seconds after its ac-
tivation if coolant is lacking or a blockage of the pump impeller has oc-
curred, and can then be restarted after approx. 2 minutes.
Connection to the vehicle cooling system
If the circulating pump U 4856 / Aquavent 6000SC is used, it will be au-
tomatically deactivated approx. 45 seconds after its activation if coolant
is lacking or a blockage of the pump impeller has occurred, and can then
be restarted after approx. 2 minutes.
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