Dunkirk EXCELSIOR EXB4075 Installation, Operation & Maintenance Manual page 49

Table 14 - Beckett NX (Direct Vent) Preliminary Burner Settings
Burner settings provided are for initial startup only. Final adjustments must be made using combustion test
instruments.
Boiler Head Insertion
Model Type Depth
4075 6 Slot 2.5"
4095 6 Slot 2.5"
5100 6 Slot 2.5"
5115 6 Slot 2.5"
5135 6 Slot 2.5"
6130 9 Slot 2.5"
Timings
Pre-purge 15 seconds
Post-Purge 2 minutes
17 - OIL BURNER, NOZZLE, & AIR SETTINGS
TABLE 14a: BECKETT DIRECT VENT PRELIMINARY BURNER SETTINGS
Firing
Combus-
Rate
tion liner
[GPH]
0.75 Oval
0.95 Oval
1.00 None
1.15 V5
1.35 V5
1.30 V6
TABLE 14b: BECKETT/ECR PART NUMBERS
Boiler
Model
4075
4095
5100
5115
5135
6130
Nozzle Nozzle
Mfr. Type
Delavan 0.60x60B
Hago 0.75x60B
Delavan 0.75x45B
Hago 1.00x60B
Delavan 1.10x60B
Danfoss 1.00x45B
Beckett
Oil Burner ECR Oil Burner
Model Part Number
NX70LC 240007531
NX70LC 240009393
NX70LC 240007532
NX70LF 240009395
NX70LF 240009396
NX70LD 240007533
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Pump Pressure
Air
Pressure Switch
Setting
[PSI] Setpoint
150 1.5 0.65" WC
155 4.0 0.65" WC
175 4.0 0.85" WC
140 1.8 0.85" WC
150 2.5 0.85" WC
175 2.0 0.65" WC
Rated
AFUE
Efficiency
[%]
86.0
85.0
86.5
85.0
84.0
86.5