Heater Craft Auxiliary Heater - Manual (Page 3)

Page 2
Heater Engine Installation
Warning – Hot engine coolant can cause severe burns! Never open the cap on a hot radiator. Some
vehicles are equipped with electric fans that may start without warning even with he engine shut off. Wait
until the engine has cooled completely before installation.
Heater Hose Identification
Output hose:
This hose would typically originate from the intake manifold or thermostat housing.
Return hose:
This hose would typically route to the water pump on front of the engine.
Note – Our heater units are equipped with with 5/8" or 3/4" heater core outlets. Please make sure that you
have the proper size of heater hose and fittings for your installation. if the hoses and heater core outlets are
not the same size, it is necessary to install a hose coupling with the proper hose sizes to prevent coolant
leakage.
Engine Installation (replacing existing heater)
1. Loosen the radiator petcock or remove the lower radiator hose and drain the engine coolant into a clean
suitable container.
2. Remove the existing heater.
3. Install the new heater (as outlined in the Heater Unit Installation section)
4. Connect existing hoses to the new unit. It makes no difference which side of core outlets to which the
hoses are attached.
Guidelines And Definitions
These instructions contain information that is important for you to know and understand. The information
provided relates to safety issues for the installation and use of our products. To help you identify important
information, we use the following system.
Warning –
Important Safety information – A hazard that may cause an injury, serious injury, or loss of life.
Caution –
Information for preventing improper operation of, or damage to equipment.
Note –
Information pertaining to the installation, operation, and/or maintenance of this product that you should pay
special attention to.
Heater Craft will not be held liable for any accidental damage to persons and/or property resulting from any
installation not completed within the specified guidelines started herein.