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Type WW/WWC 351.A07
The brine/water heat pump type BW/
BWC 351.A07 in conjunction with the
conversion kit (accessories) becomes
water/water heat pump
type WW/WWC 351.A07. A separate
well circuit supplies the primary circuit
with heating energy via a separating heat
exchanger (accessories). 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)
The heat pump stage 2 has a separate
refrigerant circuit with EEV 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 connection,
the heat pump stage 2 can be used both
for central heating and for DHW heating.
A separate secondary pump and circu-
lation pump for cylinder heating (both
accessories) are required for the heat
pump stage 2.
With the 2-stage version, either a sepa-
rate 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 cir-
cuit 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 carried
out with hydraulic modules (accesso-
ries).
Preparing for installation
Product information
(cont.)
5609 667 GB
Installation
