28
M
R
MASTER
S
P
P
M
M
HW
CW
M
Fig. 22
External heat generator and DHW cylinder
Required components
Pos. Designation
O
Extension for DHW heating, DHW cylinder,
ZK03856
R
Extension for DHW heating with oil/gas boiler,
ZK03855
S
Extension for oil/gas boiler control (external
heat generator), ZK03854
1
Heat pump
2
Heat pump control unit
3
2-way motorised damper, heating water buffer
cylinder outlet (on-site sizing for type BW
352.B027, 034 and 056)
5
Secondary pump (on-site sizing)
6
Outside temperature sensor (on-site sizing)
7
Safety assembly
8
Expansion vessel (on-site sizing)
qI
Refrigerant sensor
wP
External heat generator (on-site sizing)
wQ
Control of external heat generator (on-site siz-
ing)
wE
Temperature sensor, main flow, heating circuits
wR
3-way mixer, main flow, heating circuits (on-site
sizing)
eP
DHW cylinder (on-site sizing)
eQ
DHW cylinder temperature sensor, bottom
Pos. Designation
eW
Immersion heater, DHW cylinder (on-site sizing)
eE
Cylinder loading pump, high temperature main-
tenance, DHW heating (on-site sizing)
eT
DHW cylinder temperature sensor, top
eZ
Circulation pump for external heat generator
(on-site sizing)
eU
DHW circulation pump (on-site sizing)
eI
Temperature sensor, high temperature mainte-
nance, DHW heating (component selection ac-
cording to on-site conditions)
eO
Heat exchanger, loading, DHW heating
rP
Flow limiter, DHW heating (on-site sizing)
tP
Heating water buffer cylinder (on-site sizing)
tQ
Buffer temperature sensor, top
tW
Buffer temperature sensor, bottom
rYZ
2-way motorised damper, DHW heating inlet,
heat pump (on-site sizing for type BW
352.B027, 034 and 056)
rYU
2-way motorised damper, external heat genera-
tor outlet (on-site sizing for type BW 352.B027,
034 and 056)
rYI
Immersion heater, heating water buffer cylinder
(on-site sizing)
z-P
3-way mixer, secondary high temperature main-
tenance (on-site sizing)
Preparing for installation
Hydraulic connection requirements
(cont.)
5855865
Installation
Summary of Contents for BW 352.B027
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