Eberspächer Hydronic D4 Installation Manual - page 8
Positioning the heater
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Water pipework
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!
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 wear safety or heat
resistant gloves.
Please Note!
• When installing the heater, please take note of the
direction of flow of the coolant circuit. On the Hydronic
D4/D5 there is an arrow imprinted on the outlet port.
• 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 engine parts.
• Protect all water hoses/water pipes from chafing and
from extreme temperatures.
• Secure all hose connections with hose clips.
• After the heater has been operated for 2 hours,
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°C 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 40%
antifreeze all year round as corrosion protection
antifreeze .
• Before commissioning the heater or after changing
the cooling liquid, bleed the whole coolant circuit
including heater. A pressure test is recommended.
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