5
NX Burner Manual
Special Requirements
THE INSTALLATION OF A BURNER SHALL BE IN
ACCORDANCE WITH THE REGULATIONS OF
AUTHORITIES HAVING JURISDICTION.
For recommended installation practices in the U.S.
refer to the latest edition of NFPA 31. (CSA-B139
and CSA-B140 in Canada.
Concealed damage — If you discover damage to
the burner or controls during unpacking, notify the
carrier at once and fi le the appropriate claim.
When contacting Beckett for service information
— Please record the burner serial number (and have
available when calling or writing). You will fi nd the
serial number on the silver label located on the left
rear of the burner. Refer to Figure 1.
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Impaired Burner
Performance and Fire
Hazard.
Do NOT operate the burner beyond specifi cations
outlined in the following Table.
For applications beyond these limits, consult Beckett
Technical Service at 1-800-645-2876.
NOTE: Some packaged appliances with burners
may be agency listed as a unit to operate beyond
these limits. Consult the appliance manufacturer’s
specifi cations and agency approvals for verifi cation.
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General Specifi cations
Table 1 – Burner Specifi cations
Capacity
(Note 1)
Firing rate: - 0.40 – 1.75 GPH
Input: Min. - 56,000 Btu
Max - 245,000 Btu
Certifi cation/
Approvals
UL certifi ed to comply with ANSI/UL296 & tested to
CSA B140.0
Fuels
U. S.: No. 1 or No. 2 heating oil only (ASTM D396)
Canada: No. 1 stove oil or No. 2 furnace oil only
DO NOT USE GASOLINE, CRANKCASE
OIL, OR ANY OIL CONTAINING GASOLINE.
Electrical
Power supply: 120 volts AC, 60 Hz, single phase
Operating load: 5.8 Amps max
Motor: 1/7 hp, 3450 rpm, NEMA 48M
frame PSC rotation CCW when
facing shaft end
Ignition: Continuous duty solid-state igniter
Fuel pump
Outlet pressure - Note 2
Air tube
ATC code - See Table 2
Dimensions
(with cover)
Height (maximum): 12-1/2 inches
Width (maximum): 15 inches
Depth: 9-1/4 inches
Air tube diameter: 3-1/4 inches
Ambient Oper-
ating Tempera-
ture
+32° F. (0° C.) Minimum
+115° F. (+46° C.) Maximum
(See above Warning)
Note 1: Approval agency listed rating for these burners is 0.40 to 1.75
gph. However, the fi ring rate range is limited by the specifi c air tube
combination being used. Refer to Table 2.
Note 2. See appliance manufacturer’s burner specifi cations for recom-
mended pump discharge pressure.
Table 2 – Air Tube Combinations (ATC)
Firing rate
(gph)
Head ATC codes for usable air tube
lengths:
(min-max) 5” 7” 9”
0.40-1.00 9-Slot NX50LG NX70LG NX90LG
0.40-1.00 6-Slot NX50LH NX50LH NX90LH
0.40-1.35 9-Slot NX50LB NX70LB NX90LB
0.40-1.35 6-Slot NX50LC NX70LC NX90LC
1.10-1.75 9-Slot NX50LD NX70LD NX90LD
1.10-1.75 6-Slot NX50LF NX70LF NX90LF
Section: General Information
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