Pump Mode And Connections - Bosch SSB85 Service Manual

20 | Parameters description
6 .3

Pump mode and connections

Pump mode = 2 (default) Boiler with a manifold and two pump circuits CH/DHW
DHW_mode=0 (Ch only)
T_supply
Safety Limit
Primary
Heat Exchanger
CH supply
Manifold
CH PUMP
Fig. 43
Pump mode = 0 Boiler with two pump circuits Ch/DHW (move the internal pump wiring to the CH terminal)
DHW_mode=0 (Ch only)
T_flue
T_supply
Safety Limit
Primary
T_return
Heat Exchanger
CH
PUMP
CH supply
CH return
Fig. 44
Pump mode = 1 Boiler with one primary pump and 3-way valve for DHW (move the internal pump wiring to the CH terminal)
DHW_mode=0 (Ch only)
T_flue
T_supply
Safety Limit
Primary T_return
Heat Exchanger
GENERAL
PUMP
CH supply
CH return
Fig. 45
6720866940 (2017/11) US
DHW_mode=1
T_flue
Heat Exchanger
GENERAL
CH supply
PUMP
CH
return
DHW
PUMP
T_store
out
DHW_mode=1
Primary
Heat Exchanger
DHW
PUMP
T_store
CH supply CH return
DHW
out in
DHW_mode=1
Heat Exchanger
3-WAY
VALVE
T_store
CH supply
out
Primary
GENERAL
PUMP
CH return
Manifold
CH
PUMP
DHW
in
DHW_mode=2
Primary
Heat Exchanger
DHW
PUMP
CH
DHW_stat
PUMP
CH supply
DHW
out
Primary
GENERAL
PUMP
CH return
DHW
in
J6-1 L
DHW
PUMP
J6-3
N
CH /SYSTEM
PUMP
J6-2
L
PE
J7-1
J7-5
L
GENERAL
PUMP
J7-2 N
L
CHW
J6-1
PUMP
J6-3
N
CH
PUMP
J6-2
L
PE
J7-1
CH return
in
DHW_mode=2
Primary
Heat Exchanger
3-WAY BOILER
VALVE PUMP
DHW_stat
CH supply CH return
DHW
out in
SSB