Eberspächer HYDRONIC B 4 W SC Instruction Manual - page 17
17
Installation
3
Heating characteristics
The heater starts in the "LARGE" setting.
Once the cooling water temperature has reached
approx. 80 °C, depending on the selected fan
setting, the heater switches to the "SMALL" setting.
If the heating output is inadequate in the "SMALL"
setting, the cooling water temperature falls to 75 °C:
the heater then switches back to the "LARGE"
settings.
If the heating output is sufficient in the "SMALL"
setting, the cooling water temperature increases to
85 °C: the heater switches to the pause setting.
Once the cooling water has cooled down to 75 °C in
the pause setting, the cycle starts up again in the
"LARGE" setting.
Connection to the cooling water circuit
Integrate the heater in the water feed pipe from
the vehicle engine to the heat exchanger “inline
connection”
Disconnect the water feed pipe from the vehicle engine
to the vehicle heat exchanger. Connect up the heater
with connection pieces and water hoses to the water
feed pipe.
Route and connect a water hose from the pressure
connection of the water pump to the water intake
connection of the heater.
Secure both connection parts with hose clips.
Heater
Connection piece
Heat exchanger
Vehicle engine