The operation of electric pre-heaters is based on the principle of a thermosyphon or natural circulation of the coolant. The heating element raises the temperature of the fluid, it circulates in the engine in a natural way, and when the temperature limit is reached, the heater is automatically turned off.
It is necessary
- - electric heater;
- - tees and branch pipes;
- - clamps and fixing screws;
- - screwdriver, pliers, wrenches
Instructions
Step 1
Diagnose the cooling system before installing the heater. Eliminate any leaks and malfunctions found, fill with fresh coolant.
Step 2
Install the heater only in a horizontal position with both pipes facing up. Select the installation location so that the device is at the lowest point in the cooling system. Connect the heater pipes to the cooling system at remote locations.
Step 3
Connect the inlet pipe at the lowest point of the cooling system, and the outlet pipe at the top. The connection point of the inlet pipe must in no case be lower than the pipe itself. The hose for connecting the outlet pipe must not have kinks that impede the circulation of the liquid. When connecting the heater to the branch pipes through tees, do not make a tie-in between the radiator and the thermostat.
Step 4
If the coolant thermostat is located on the lower radiator pipe, and the engine block is equipped with a drain plug, connect the inlet pipe directly to the drain plug through the union, and the heater outlet pipe to the upper radiator pipe through a tee. If there is no drain plug on the block, connect the heater inlet to the heater return hose through a tee.
Step 5
If the coolant thermostat is located on the upper radiator pipe, connect the heater inlet to the lower radiator hose through the tee, to the drain plug through the fitting, or to the heater return hose through the tee. Connect the heater outlet to the heater hose through a T-piece.
Step 6
When connecting the heater to the on-board network, connect the wires to the battery terminals, observing the polarity. Provide a fuse when connecting the positive wire of the heater. On older vehicles, install a diode to protect against reverse polarity voltage. Connect the negative wire to the corresponding battery terminal or to the nearest bolt on the body, having previously cleaned the contact area.
Step 7
When connecting the device to a city network (220 V), be sure to provide grounding. The garage wiring must be equipped with a circuit breaker and residual current device.
