E93.9950EN CB Cascade manual
19
11. Mounting the hydraulic group and the connecting sets
After the boiler has been mounted on the frame, the hydraulic group and the connecting sets must be mounted.
Attention!
All lines/piping must be mounted free of tension. The weight of all the components should be supported
separately from the boiler so there is no force on the connections.
Attention!
During mounting of the hydraulic and gas header group it is very important that the position of the support beam
as well as the support brackets of the headers allow for some play (tolerance) for a neat installation. After
finishing the installation, the support beam and brackets can be tightened.
1. Mount the support brackets for the return header at nominal height. See also Figure 7.2.
2. Place the return header(s) (bottom water header / blue) on the support brackets and fasten it (them) loosely
with the U-bolts. Make sure that the connections for the corresponding connecting sets are at the back of
the header.
3. Mount the connecting sets for the return header. See also Figure 7.3.
Attention
!
An external pump (to be ordered separately) must be mounted between the return connecting set and the
boiler. Required for this are:
-
pump supplied with 2 flat-seal two-part couplings;
-
1 flat-seal coupling for connection to boiler (inside thread / female thread)
-
1 flat-seal coupling for connection to connecting set (outside thread / male thread)
a. Fit the flat-seal couplings to the boiler and to the connecting set.
b. Mount the pump to the boiler; pay attention to its orientation.
c. Mount the connecting set to the pump; pay attention to its orientation.
d. Bend the flexible part of the return connecting set into a smooth bend.
e. Fit the connecting set to the return header (conical three-part coupling). Fit the loose part to the header
and then fasten the coupling.
4. Mount the support brackets for the supply header. See also Figure 7.2.
5. Place the supply header(s) (top water header / red) on the support brackets and fasten it (them) loosely with
the U-bolts.
6. Mount the connecting sets for the supply header. See also Figure 7.3.
The connecting set has a three-part coupling for the connection to the boiler.
a. Fit the loose part of the three-part coupling to the boiler.
b. Fit the connecting set to the coupling.
c. Fit the connecting set to the supply header (conical three-part coupling). Fit the loose part to the header
and then fasten the coupling.
7. Fit the gas connecting sets to the boiler and to the gas header.
8. When all parts are mounted correctly and are free of tension, fasten all couplings, bolts and U-bolts.
9. Next mount the low loss header. See chapter 12.
