P
A
R
T
I: INST
ALLA
TION
13
Low NOx Burner
* S = measure referred to burners fitted with standard blast tube
L = measure referred to burners fitted with extended blast tube
Recommended boiler drilling jig and burner flange
DN
A(S*) A(L*) B(S*) B(L*)
C
D
±5mm
E
±5mm
F
G
H
J
K
L
M
N
Omin Oma
x
P
Q
R
S
T
W
X
Y
NGX550 - LGX550
25/
32
874
974
253
353
590
671
245
426 176 198 384 241 384 M10 247
157
192
174
552
377
175
69
543
533 168
40
874
974
253
353
590
744
318
426 176 198 384 241 384 M10 247
157
192
174
552
377
175
69
553
533 168
50
874
974
253
353
590
744
318
426 176 198 384 241 384 M10 247
157
192
174
552
377
175
69
603
533 168
