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WeiloMcLain
5urner
Specifications
• NX
Burner
Specifications
for
Well=
McLain Ultra Oil Boilers
Verify that burner specification number (on burner carton)
and configuration agrees with information below.
The table below provides burner specifications and start-
ing air settings for NX burners applied to WeiI-McLain
Model UO boilers. Follow all instructions in this burner
manual, the boiler manual and the fuel pump literature to
install, setup and service the burner.
The remainder
of this manual
contains
Infor-
mation
to be used ONLY by a qualified
Service
Technician.
Table 1. Burner
Configurations
Boiler
Burner Spec
Firing
Air Tube
insertion
Primary
Alternate
Fuel Pump
Head/Air
Model
Rate
Combina-
Nozzle
Nozzle
Pressure
Adjustment
(GPH)
tion
(psig)
Plate Setting
UO-3CV
WL5703
0.80
NX70LC
1-3/4"
0.65X 60°A
0.65X 70°B
150
1.75
(See Note1)
Delavan
Hago
UO-3CV
WL5703
1.00
NX70LC
1-3/4"
0.75X 60°B
0.75X 60°B
175
2.50
Hago
Delavan
UO-4CV
WL5704
1.20
NXg0LB
3-1/2"
1.00X 70°B
1.00X 70°B
140
4.00
Hago
Delavan
UO=5CV
WL5705
1.40
NXg0LD
3=1/2"
1.10X 70°B
1.10X 70°B
160
1.50
Hago
Delavan
UO-3DV
WL5803
0.80
NX70LC
1-3/4"
0.65X 60°A
0.65X 70°B
150
1.75
(See Notes1& 2)
Delavan
Hago
UO=3DV
WL5803
1.00
NX70LC
1-3/4"
0.75X 60°B
0.75X 60°B
175
2.50
(SeeNote 2)
Hago
Delavan
UO-4DV
WL5804
1.20
NXg0LB
3-1/2"
0.85X 60°W
0.85X 60°W
190
4.00
(SeeNote 2)
Delavan
Hago
UO-5DV
WL5805
1.40
NXg0LD
3=1/2"
1.10X 70°B
1.10X 70°B
160
1.50
(SeeNote 2)
Hago
Delavan
1) Shipped as 1.0 GPH Burner Configuration.
The 0.80 GPH input uses same burner as 1.0 GPH input. Replace nozzle, adjust pump
pressure and Head/Air setting as shown above and install 14"x16" blanket on combustion chamber floor. (See Maintenance Section
for Nozzle Replacement details.)
2) Direct Vent Boilers require that a combustion chamber blanket be installed (blanket supplied with burner).
Figure
1. Burner
label location
Page 4
0enero}
mode}-
Information
Serial number, --
including
dote code
Rating Information-
Approval
agency --
symbols
Primary
group --
and fuel oil
Model " NX"
Series 0il Burner
_JAL _UMBER
000405-62756
Illlltllllllllll!lfllE
C _-_
US USTED
o_ _n_
_o pHOOOOl
R.W,Beckett
Carp,
i. _ usa
MFR'S SETTINGS
"_% ........
XX0000 R00
000405-62736
--
R.W. Beckett
manufacturer's
settings
--
R.W. Beckett
specification
number
and revision
Can be customized
by
individual specification
SK9675
RWB 6104 WMNX
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