Installation Instructions

Specification
6 720 645 817 (2010/09)
25
2.2.2 Factory-prepared 2-boiler cascade MKB ...
Fig. 11 Factory-prepared 2-boiler cascade
AA Flue gas connection
AL Combustion air pipe connection (balanced flue operation only)
GAS Gas connection
RK Boiler return
VK Boiler flow
1) Pump installation point, boiler circuit
6 720 643 417-13.1O
717
1)
T
G
T
Z
615
1143
1018
Y
AA
Ø
AA
1)
Y
RK
Y
VK
215
500
OM
B
G
B
K
S
N
K
X
AA
X
GAS,
X
AL
AL
GAS
VK
RK
U
1517
R
1)