Viessmann BW 351.A07, Инструкции по установке и обслуживанию для подрядчиков

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■ The output of type BW can be supple-
mented with a stage 2 heat pump
(type BWS).
■ Using the conversion kit (accessory),
the brine/water heat pump type BW/
BWC can be converted into a water/
water heat pump. A separate well cir-
cuit provides the primary circuit with
heating energy via a separating heat
exchanger (accessory). The compo-
nents of the well and primary circuit
are switched by the heat pump control
unit.
Type BWS 351.A07 (heat pump stage 2)
■ Heat pump stage 2 has a separate
refrigerant circuit with refrigerant cir-
cuit controller, but no separate heat
pump control unit. Stage 2 is switched
via the heat pump control unit of stage
1.
■ Depending on the hydraulic connec-
tion, the heat pump stage 2 can be
used both for central heating and for
DHW heating. A separate secondary
pump and circulation pump for cylinder
heating (both accessories) are
required for the heat pump stage 2.
■ With the 2-stage version, either a sep-
arate primary pump can be used for
both stages, or a common primary
pump can be used on the primary side.
Irrespective of this, the flow and return
temperature sensors are installed in
the primary circuit at the common flow
and return.
■ Heat pump stage 2 must be installed
to the left of the heat pump stage 1.
■ The hydraulic connection can be car-
ried out with hydraulic modules
(accessories).
Preparing for installation
Product information
(cont.)
5546 273 GB
Installation