Technical information

79902
3/4"
5/8"
1/4"
78340
79908
78915
3/4"
SIZES: 79909=1 IN., 79614=1
1
/
4
IN., 79615=1
1
/
2
IN., 79616=1
3
/
4
IN., 79617=2 IN.
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 THER-
MOSTAT 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 circu-
lation 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 ther-
mostat, 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 cer-
tain 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.
1. Equipped with check valve.
2. A Model Available for all size engines.
MODEL SPECIFICATIONS AND HEATERS RECOMMENDED
FOR VARIOUS SIZE COOLING SYSTEMS
MODELS VOLTS WATTS AMPS CAPACITY
79401 120 850 7.00 Up to 18 qts.
79402 120 1000 8.3 16 - 25 qts.
79406 240 1000 04.16 16 - 25 qts.
79403 120 1500 12.5 26 - 40 qts.
79405 240 1500 6.25 26 - 40 qts.
79404 120 2000 16.6 41 - 60 qts.*
79407 240 2000 8.3 41 - 60 qts.
79408 120 2000 16.6 41 - 60 qts.**
79409 240 2500 10.4 Over 60 qts.
Short warm-up periods should be avoided when it is extremely cold. It is bet-
ter to operate the heater all night. This will eliminate frozen water hoses. Our
heaters are thermostatically controlled to obtain the most efficient operation.
*with 15 amp plug
**CSA approved with 20 amp plug
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