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Installation Examples
Installation Examples
Connection to the hydronic system
The Vitocal 100-AW AM2V series heat pump can
operate in a closed-loop hydronic system (the
minimum heating medium pressure is 8 PSI [0.5
bar]). The hydronic installation must be carried
out in compliance with the applicable standards.
The pipes connecting the heat pump to the indoor
unit must have an internal diameter to ensure an
adequate flow of the heating medium (see technical
data table).
Flexible piping must be used to connect the heat
pump to the hydronic system to prevent the
transmission of vibrations to the system. The
heating medium pipes and connections must be
thermally insulated. Do not switch off the unit
when the outdoor air temperature is below freezing.
This will protect the condenser of the outdoor unit
from damage. If there is a risk of power failure, the
heat pump heating circuit must be isolated from
the hydronic module by means of an additional
exchanger and the heat pump heating circuit must
be filled with an antifreeze. A prerequisite for the
warranty is an installation of a solids separator at
the unit inlet.
The hydronic installation must be made in such a
way that the indoor unit can be operated in the
heating circuit without the outdoor unit (according
to the following installation diagrams). This will
ensure the operation of the heating system in the
event of a failure of the outdoor unit.
38
Vitocal 100-AW AM2V Installation, Service and Operating
Please note that in the following piping layout ex-
amples all pumps are field supplied.
1
WARNING
If a DHW storage tank other than a Viessmann
Vitocell 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.
1
IMPORTANT
The examples on the following pages depict
possible piping layouts of the Vitocal 100 AW
heat pump equipped with Viessmann System
Technology. For heat pump 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.
1
IMPORTANT
DHW supply and return piping between Vitocal
DHW connections and the Viessmann DHW tank
connections, shall be a minimum of 1b in. nominal
pipe diameter connection outlet sizes provided on
the Vitocal and the DHW tank). This will ensure
the residual head of the field supplied pump is fully
utilized to overcome the resistance of the DHW
heat exchanger coil and to provide sufficient water
flow to the Vitocal.
In non-Viessmann DHW tank applications, perform,
in addition to the above, accurate calculations for
DHW tank coil pressure drop versus Vitocal internal
pump residual head to ensure sufficient water flow
to the Vitocal heat exchanger. Failure to heed the
above instructions may inadequate DHW supply.
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