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ELECTRICAL WIRING OF BURNER
Refer to the equipment manufacturer's manual for wiring of the burner into the piece of equipment. If burner is correctly
wired according to the equipment manufacturer's manual and the burner is not working refer to wiring diagrams
Figure 4
Figure 5
and
on pages 16 & 17 for internal wiring of the burner.
For line voltage wiring to the burner use copper conductor wire not lighter than #12 AWG. If a fused disconnect is used, it
should be sized for a minimum of 30 amps.
If the oil burner comes equipped with an oil primary control, the burner will have a white command wire that will be wired
in series to a manual switch or limit switch. If this circuit is closed and complete it will energize the ignition device and fuel
solenoid. The burner is controlled by the piece of equipment. When the piece of equipment calls for heat, verify that the
equipment is controlling the burners on/off operation. When connecting the burner to the DC power supply, utilize the
knockout provided on the burner's junction box for field wiring connections.
NOZZLE AND AIR CONE SELECTION
The EHASR-DC and EH-DC oil burners typically fire well with a solid or semi-solid nozzle with a spray angle of 80, 70, or
60 degrees. Generally the use of an 80 degree solid nozzle is a good starting point. Always use the proper nozzle size,
spray cone type and spray angle the equipment manufacturer recommends. Should this information not be available, your
own good judgment will prevail. Under no circumstances attempt to fire the EHASR-DC oil burners under their 0.75 gal/hr
minimum input rating or over their 3.00 gal/hr maximum input rating. Under no circumstances attempt to fire the EH-DC oil
burner under its 3.00 gal/hr minimum input rating or over its 6.00 gal/hr maximum input ratings. Consult
35 for air cone recommendations for a given firing rate.
NOZZLE INSTALLATION
In order to install or change the nozzle, the oil gun assembly needs to be removed from the burner. The EHASR-DC and
EH-DC burners has an arrow decal that lines up with the leading edge of the oil gun slot cover plate. This will help with re-
installing the oil gun in the proper position once the nozzle has been installed. See Figure 7 for part identification.
Arrow
Decal
Slot
cover
plate
Label all wires prior to disconnection when servicing burners. Wiring errors can cause
improper and dangerous operation. Verify proper operation after servicing
If any of the original burner wiring must be replaced, it must be replaced with
#14 AWG 105°C wire or equivalent
Figure 7– Side View of Oil Gun Slot Plate Cover
23
Figure 3
,
Table 5
on page
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