So anyway, here are the instructions, it was very straightforward, works great.
INSTRUCTIONS FOR INSTALLING
AND OPERATING
1. Drain and clean the cooling system. (Recommend that this be done
annually for more efficient heater operation.
2. Mount heater vertically with the heater inlet (cold water line)
connected to the engine block drain, radiator drain or lower radiator
hose.
3. Heater outlet (hot water line) may be connected to the engine block
at several locations.
Examples:
A. heater hose entering motor block.
B. hose line entering water pump.
C. engine block drain.
4. Use a 5/8” diameter heater hose for connecting heater inlet and outlet
to engine. Use a minimum length of heater hose to prevent formation of
air pockets.
5. Refill cooling system.
6. Bleed the air from the hose lines at the highest connection.
OPERATE ENGINE FOR 30 MINUTES TO OPEN ENGINE THERMOSTAT
BEFORE TESTING HEATER.
7. Place the electric cord from heater through radiator grille or other
convenient opening and tape or fasten in position, making sure it is
clear of all moving parts (fan blades) and heater parts (manifold).
8. Connect extension cord to the proper voltage outlet. Check the circulation
of COOLANT TO MAKE ABSOLUTELY SURE THAT THE
HEATED COOLANT CIRCULATES THROUGH THE HEATER
HOUSING. If the radiator becomes warm before the engine block, the
hot water is possibly being returned to the block too close to the thermostat,
thus causing it to open prematurely. Relocate your hot water
return line.
9. This heater is equipped with a three prong (grounding) plug and
should be connected to a properly grounded circuit.
Heater failure is usually caused by lack of circulation.
Check for the following when this happens:
(a) Improper installation
(b) Trapped air, preventing siphoning action
(c) Water too low in the radiator
(d) Coolant frozen
(e) Car heater control closed
(f) Antifreeze solution too strong
10. If an extension cord is used in conjunction with this heater, be certain
that the wire size of the extension cord is of adequate size for the
wattage of the heater and distance from the receptacle to the heater.
Consult a licensed electrician if further information is required.
