General - Viessmann VITOCROSSAL 200 CI2 Series Installation Instructions Manual

Vitocrossal 200 CI2 Installation

General

The schematics on the following pages are to be seen
as guidelines only. They further do not display all system
varieties, safety devices, or concepts possible. Specific
system layouts may be further discussed with the local
Viessmann sales representative office.
CAUTION
For underfloor heating applications, an additional
immersion or strap-on aquastat must be installed in the
low temperature underfloor loop (downstream of the
mixing valve) to de-energize the pump and/or boiler
to prevent overheating. High water temperatures can
damage concrete slabs.
IMPORTANT
The examples on the following pages depict possible piping
layouts of the Vitocrossal 200, CI2 boiler equipped with
Viessmann System Technology.
For boiler and tank combinations, please install only
feasible combinations listed in the Viessmann Price List.
Please note that the following examples are simplified
conceptual drawings only!
Piping and necessary componentry must be field verified.
A low water cut-off (LWCO) must be installed where
required by local codes.
Proper installation and functionality in the field is the
responsibility of the heating contractor.
WARNING
If a DHW storage tank other than a Viessmann Vitocell
300 tank is used, the installer must verify proper
operation of the Viessmann DHW tank temperature
sensor with the original manufacturer of the tank.
Viessmann strongly recommends the installation of a
temperature tempering valve in the DHW supply line.
IMPORTANT
For DHW tank applications, perform, accurate calculations
for DHW tank coil pressure drop versus DHW pump (field
supplied) residual head to ensure sufficient water flow to
the boiler heat exchanger. Failure to heed the above
instructions may cause boiler short-cycling and inadequate
DHW supply.
Note: In the following piping layout examples all pumps
are field supplied.
System Layout
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