
400
500
500
500
500
500
C
D
E
F
G
H
I
J
K
L
M
N
160
1,000
Fig. 6. Single Boiler Clearances
Fig. 7. Clearances for Cascaded Boilers
G-13
A-070336_EN • Rev. A
T
echnical
S
pecificaTionS
Connections
N 120 FS
N 160 FS
N 200 FS
N 250 FS
supply/return connections ( )
Ø - [M]
in.
2
2
1/2
safety group connection
(
) Ø - [F]
in.
1
1
gas connection ( )
Ø - [M]
in.
3/4
1
flue gas exhaust connection
Ø
mm
130
180
combustion air inlet connection
Ø
mm
125
125
condensate drain connection
Ø
mm
25
25
min. cross section area of air inlet
mm
2
12,000 12,000
Clearances
Min.
Recommended
top
mm
400
800
back
mm
500
700
front
mm
1,000
1,000
sides
mm
500*
* in a cascade configuration, boilers can be installed side-by-
side with a 160 mm clearance between them. Side clearance
must be complied with for the “outer” side of the first and last
boiler in the chain.