Technical information

EXTERNAL

HEATER 79400

INSTRUCTIONS

FOR INSTALLING AND OPERATING

1. Remove the radiator cap

2. Install the heater in a horizontal position in the hose line that returns

the coolant to the water pump from the cab heater. Heater must be

mounted a minimum of 4” below the outlet of the cab heater. The

lower the heater is mounted, the better the circulation.

It is not necessary to drain the coolant to install this heater. Hose can

be clamped with two locking type pliers before cutting. It may be nec-

essary to add hose between cab heater and engine heater to comply

with instruction number 2.

3. After cutting hose, pace a gear type clamp on each hose end. Install

engine heater into heater hose with the arrow on the heater pointing

toward the water pump. Make sure that the engine heater is positioned

so that both inlet and outlet are on the top side. Arrow must point in

direction of normal water flow. If installed improperly, neither the cab

heater nor engine heater will function properly.

4. Place clamps into position and secure. If necessary, use furnished tie

down straps on heater hose to help support engine heater. Do not place

tie downs on engine heater housing. Replace radiator cap. Place the

electric cord from heater through radiator grill or other convenient

opening and tape or fasten in position, making sure it is clear of all

moving parts (fan blades) and Heated parts (manifold).

5. With the heat control on dashboard set at maximum heat, run engine

until thermostat opens to insure that water is in the heater prior to

engine heater operation. (The dashboard heater control must be set at

maximum heat when engine heater is in operation.)

6. Bleed the air from the engine block, hoses and heater housing

before connecting the engine heater to the power supply.

7. Connect the engine heater to the proper voltage outlet. The heater is

thermostatically controlled and can be operated all night or for several

hours prior to starting the engine.

8. This heater is equipped with a three prong (grounding) plug and

should be connected to a properly grounded circuit.

9. If and 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.

It is not necessary to drain the coolant to

install this heater. Hose can be clamped

with two locking type pliers before cutting.

It may be necessary to add hose between

cab heater and engine heater to comply

with instruction number 2.