Weil-McLain UO-3 CV, Instruction Manual

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5
Weil-McLain Ultra Oil NX Burner Manual
Figure 1. Burner label location
NX Burner Specifi cations for Weil-McLain
Ultra Oil Boilers
The table below provides burner speci fi cations and
starting air settings for NX burners applied to Weil-
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.
Weil-McLain Burner
Specifi cations
Boiler
Model
Burner Spec
Firing
Rate
(GPH)
Air Tube
Combination
Insertion Primary Nozzle
Alternate
Nozzle
Fuel Pump
Pressure
(psig)
Head/Air
Adjustment
Plate Setting
UO-3 CV
WL6403
(See Note1)
0.80 NX70LC 1-3/4”
0.65 X 60°A
Delavan
0.65 X 70°B
Hago
150 1.75
UO-3 CV WL6403 1.00 NX70LC 1-3/4”
0.75 X 60°B
Hago
0.75 X 60°B
Delavan
175 2.50
UO-4 CV WL6404 1.20 NX90LB 3-1/2”
1.00 X 70°B
Hago
1.00 X 70°B
Delavan
140 4.00
UO-5 CV WL6405 1.40 NX90LD 3-1/2”
1.10 X 70°B
Hago
1.10 X 70°B
Delavan
160 1.50
UO-3 DV
WL6503
(See Notes1 & 2)
0.80 NX70LC 1-3/4”
0.65 X 60°A
Delavan
0.65 X 70°B
Hago
150 1.75
UO-3 DV
WL6503
(See Note 2)
1.00 NX70LC 1-3/4”
0.75 X 60°B
Hago
0.75 X 60°B
Delavan
175 2.50
UO-4 DV
WL6504
(See Note 2)
1.20 NX90LB 3-1/2”
0.85 X 60°W
Delavan
0.85 X 60°W
Hago
190 4.00
UO-5 DV
WL6505
(See Note 2)
1.40 NX90LD 3-1/2”
1.10 X 70°B
Hago
1.10 X 70°B
Delavan
160 1.50
1) Shipped as 1.0 GPH Burner Con fi guration. 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
fl oor. (See Maintenance Section for Nozzle Replacement details.)
2) Direct Vent Boilers require that a combustion chamber blanket be installed (blanket supplied with burner).
Table 1. Burner Confi gurations - Verify that burner specifi cation number (on burner carton) and confi guration agrees
with information below.
Fozen Plumbing and Water Damage
Hazard.
Unoccupied residences in severly cold weather could
experience frozen plumbing in just a few hours if the
heating system fails for any reason. Consult your
HVAC contractor for effective preventive protection,
such as electronic monitoring systems with 24/7 dial-up
The remainder of this manual
contains Information to be used
ONLY by a qualifi ed Service Technician.
Section: Weil-McLain Burner Specifi cations