8
Incorrect usage or operation of the appliance (e.g. the
appliance being opened by the system user) is prohibi-
ted and will result in an exclusion of liability. Incorrect
usage also occurs if the components in the heating
system are modified from their intended function.
Note
The appliance is intended exclusively for domestic or
semi-domestic use, i.e. even users who have not had
any instruction are able to operate the appliance
safely.
Product information
Type BW 351.B
Design
Vitocal 350-G, type BW 351.B are brine/water heat
pumps for central heating, room cooling and DHW
heating in mono mode or mono energetic systems.
The refrigerant circuit has an electronic expansion
valve (EEV) with an independent control circuit (refrig-
erant circuit controller).
For central heating and DHW heating, an instantane-
ous heating water heater (on site) can also be control-
led.
Output extension
The output of type BW 351.B can be supplemented
with a heat pump stage 2 (type BWS 351.B).
Hydraulics
For type BW 351.B, high efficiency circulation pumps
for the primary and secondary circuits and a high effi-
ciency circulation pump for DHW heating are available
as accessories.
Conversion to a water/water heat pump
The Vitocal 350-G brine/water heat pump, type
BW 351.B, becomes a water/water heat pump in con-
junction with the conversion kit (accessories). A sepa-
rate well circuit provides the primary circuit with heat-
ing energy via a separating heat exchanger (accesso-
ries). The components of the well circuit and primary
circuit are controlled by the heat pump control unit.
Central heating
The heat pump can supply up to 3 heating circuits –
1 heating circuit without and 2 heating circuits with
mixer. The mixer extension kit (accessories) is
required to control the mixer for the second heating cir-
cuit with mixer.
Room cooling
Rooms can be cooled either via 1 heating/cooling cir-
cuit or 1 separate cooling circuit. Hydraulic compo-
nents need to be provided on site for this purpose.
Heat pump control unit
The entire system is monitored and controlled by the
integral Vitotronic 200 heat pump control unit,
type WO1C.
Type BWS 351.B (heat pump stage 2)
Heat pump stage 2 is used to extend the output of type
BW 301.B (heat pump stage 1).
Note
Heat pump stage 2 must be installed to the left of heat
pump stage 1.
Design
Heat pump stage 2 has a separate refrigerant circuit
with refrigerant circuit controller, but no separate heat
pump control unit. Stage 2 is switched via the heat
pump control unit of stage 1.
Information
Intended use
(cont.)
5855006
Information