El75H Startup and Tuning

With the introduction in 2020 of the all new EL75H, EnergyLogic has entered the market for big heat in small spaces. Rated for up to 1,750 sq. ft. the EL75H is perfectly suited for your home garage or shop.

Equipped with the same metering pump, air compressor, and air shutter found on all EnergyLogic heaters and boilers, and a burner of similar design, the El75H has several tuning options standard in order to get your new heater running perfectly in your environment.

The first step in ensuring correct operation of your heater is installation. It is critical that the chimney/flue is sized appropriately for your unit. This includes the diameter of the flue pipe itself (6″) and the length of the flue. The length of the flue is dependent on your roof height from the floor, and the flue must extend at least 2′ above any surface within 10′ of the flue itself. This will ensure that the flue does not “pack up” and will allow you attain the desired level of draft (.04″ WC as measured on the manometer) after about 15 minutes of machine operation.

Once the draft is set to desired levels, it’s time to fine tune your burn.

Visually, the flame will be bright yellow. The readout on the control unit will display an ohm reading that corresponds to the brightness of the flame- the lower the ohm reading, the brighter the flame. In order for the control to “prove” the flame, it must stay below 1500ohms.

As with any internal combustion, the appropriate fuel/air ratio is critical. Because all EnergyLogic heaters use a metering pump and a constant spark transformer, the only adjustments we can make are to the air supplies.

This picture shows both the gauge on the air compressor, as well as the Air Shutter on the side of the burner. From the factory, your air shutter will be set around 75% open. Higher altitudes may require it be open further to allow more air flow. This air shutter is adjusted by loosening the two bolts which hold it in place and rotating as displayed by the red arrows above.

The pressure from the air compressor is adjusted via regulator found at the top of the compressor, behind the gauge, as seen here.

This regulator is adjusted by holding the adjustment screw with a screwdriver, while loosening the locking nut. Once the locking nut is loosened, the adjustment screw can be used to set the air pressure, and once it’s at the desired level, be sure to lock it into place with the locking nut.

While there is no one setting that will work universally, we have found air pressure on the gauge is best between 2.5-4 PSI. It would be in your best interest to start in this range and make small adjustments to achieve the optimal burn visually, as well as displayed on the control.


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