14
5790 733 - 07
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Installation
Note:
Make all connections free of load and torque stresses.
The heating system must be properly flushed, especially
if the Vitocrossal 300, CA3 boiler is connected to an
existing heating system in a retrofit application.
See page 11 for details.
Connect the system to the boiler according the diagram
on page 55.
Note:
All connections which are not being utilized for
water connections or for controls must be properly
closed.
The supplied air vent and pressure relief valve must be
installed on the supply header of the boiler - the alternate
pressure relief valve location may be in the boiler supply
line. The piping to the precharged expansion tank, as well
as any automatic feed water required, must be connected
to the boiler return. Boiler pump shall be installed on
return pipe, pumping water into the boiler.
The supplied low water cut-off should be installed directly
on the safety header of the boiler or may be installed in
the boiler piping above the pressure vessel.
Note:
Piping diagrams for specific system layouts are
available. Please enquire with your local Viessmann
sales representative.
IMPORTANT
The Vitocrossal 300, CA3 boiler is only suited for hot
water heating. Do not install a 4-way mixing valve,
bypass valve or similar.
Boiler Connections
Preparing the Boiler
1.
Once removed from the wooden shipping pallet from
the boiler base. Remove the 4 leveling bolts
A
from
boiler’s accessory package and install into the four
corners of the boiler base.
Note:
When using seismic brackets
B
(optional
accessory) do not install levelling bolts.
2.
It is recommended to place a flat piece of steel plate
under each leveling bolt for better weight distribution
and adjustment.
3. Level the boiler, by adjusting the floor levelling bolts.
Note:
It is recommended that the levelling bolts included
with the boiler are used when installing the boiler
on uneven surfaces.
Refer to the Seismic bracket Installation
Instructions when using the optional seismic
mounts.
