Operating instructions

3
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• Correct installation of this heater is necessary to ensure
safe and proper operation.
Read and understand this manual before attempting to
install the heater. Failure to follow all these instructions
could cause serious or fatal injury.
• Heater must be turned off while re-fueling.
• Do not install heater in enclosed areas where com-
bustible fumes may be present.
• Do not install heaters in engine compartments of gaso-
line powered boats.
• Install the exhaust system so it will maintain a minimum
distance of 50mm (2”) from any flammable or heat sensi-
tive material.
• Ensure that the fuel system is intact and there are no leaks.
• Route the heater exhaust so that exhaust fumes cannot
enter any passenger compartments.
• If running exhaust components through an enclosed
compartment, ensure that it is vented to the outside.
• The use of Espar coolant heaters requires that the
coolant in the system to be heated contains a proper
mixture of water and antifreeze to prevent coolant from
freezing or slushing.
• If the coolant becomes slushy or frozen, the heater’s
coolant pump cannot move the coolant causing a block-
age of the circulating system. Once this occurs, pressure
will build up rapidly in the heater and the coolant hose
will either burst or blow off at the connection point to the
heater.
• This situation could cause engine damage and/or per-
sonal injury. Extreme care should be taken to ensure a
proper mixture of water and antifreeze is used in the
coolant system.
• Refer to the engine manufacturer’s or coolant manufac-
turer’s recommendations for your specific requirements.
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CCaauuttiioonn
: During electrical welding work on the vehicle
disconnect the power to the heater in order to
protect the control unit.
NNoottee::
All measurements contained in this manual con-
tain metric and approximate SAE equivalents in
brackets eg 25mm (1”).
Direct questions to Espar Heater Systems:
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This publication was correct at the time of print.
However, Espar has a policy of continuous improve-
ment and reserves the right to amend any specifica-
tions without prior notice.