Eberspächer HYDRONIC B 4 W SC Instruction Manual - page 16
16
Installation
3
Connection to the cooling water circuit
The heater is connected to the cooling water circuit
in the water feed pipe from the vehicle engine to the
heat exchanger. There are four possible alternative
installations here.
Danger!
Risk of injuries and burns!
It is possible for the coolant and components of the
coolant circuit to get very hot.
• Parts conveying water must be routed and fastened
in such a way that they pose no temperature risk to
man, animals or material sensitive to temperature
from radiation / direct contact.
• Before working on the coolant circuit, switch the
heater off and wait until all components have cooled
down completely, if necessary where safety gloves.
• When installing the heater and the water pump,
please note the direction of flow of the coolant
circuit.
• Fill the heater and water hoses with coolant before
connecting to the coolant circuit.
• Route the water hoses without any kinks, and in a
rising position if possible.
• When routing the water pipes, observe a sufficient
clearance to hot vehicle parts.
• Protect all water hoses / water pipes from chafing
and from extreme temperatures.
• Secure all hose connections with hose clips
(tightening torque = 1.5 Nm).
• After the vehicle has been operating for 2 hours or
travelled 100 km, tighten the hose clips again.
• The minimum water flow rate is only guaranteed if
the temperature difference of the heating medium
does not exceed 10 K between water inlet and water
outlet during heating.
• Only overpressure valves with an opening pressure
of min. 0.4 – max. 2 bar may be used in the coolant
circuit.
• The coolant liquid must contain at least 10 %
antifreeze all year round as corrosion protection.
• The cooling liquid must contain sufficient antifreeze
for low temperatures.
• Before commissioning the heater or after changing
the cooling liquid, the whole coolant circuit including
heater must be vented free of bubbles according to
the instructions issued by the vehicle manufacturer.
• Only top up with coolant approved by the vehicle
manufacturer.
Please note!