Bosch Greenstar combi 151 p - Connecting the Outdoor Temperature Sensor; (Accessory); Connecting Additional Accessories

Electrical connection | 33
6720872361 (2017/04)Greenstar combi 100 p / 151 p
7.2.2 Connecting the outdoor temperature sensor (accessory)
▶ Connecting the controls automatically establishes the internal
communications BUS connection ( see installation instructions for
the controls).
▶ Punch out plastic insert.
▶ Connect cable of the outdoor temperature sensor according to
Fig. 37.
▶ Insert cable for the outdoor temperature sensor.
▶ Secure the cable on the strain relief.
Fig. 37 Electrical wiring outdoor temperature sensor
7.2.3 Connecting additional accessories
▶ For splash protection (IP), always cut the strain relief to match the
diameter of the cable.
Fig. 38 Cut off grommets
▶ Feed cable through strain relief and connect accordingly.
▶ Secure the cable on the strain relief.
Bosch room controls
Connect only Bosch room controls to the internal BUS of this boiler.
For installation and electrical connection, see the installation
instructions for the products.
Connecting temperature guard TB 1 (external manual reset high
limit or low water cut off (LWCO))
This connection allows the installation of external safety switches.
• External manual reset high limit
• Low water cut-off (LWCO)
• Radiant overheat protection
Fig. 39 Electrical wiring TB 1
When the temperature guard trips, central heating and DHW modes are
interrupted.
Connecting the supply temperature sensor (e.g. for low-loss header
or system supply pipe)
Do not exceed a sensor cable length of 33 feet (10 m).
The supply temperature sensor is available as an accessory.
The supply temperature sensor for system supply pipe (Fig. 40 [2])
must be installed in closest vicinity with boiler supply Tee.
Fig. 40 Installation of the supply temperature sensor directly adjacent
to the boiler supply
[1] System secondary line (heating) – Supply pipe
[2] Supply temperature sensor for system supply pipe
[3] Boiler primary line - supply pipe 1"
[4] Boiler primary line – Return pipe 1"
[5] System secondary line (heating) – Return pipe
6 720 641 933-35.1O
A
F
6 720 641 933-91.1o
TB1
6 720 641 933-44.1O
B
B
4
2
1
F
A
LS NS
LP
NP
9
8
7
1
2
C
ϑ
6 720 641 933-97.1o
ϑ
1
2
3
4
5
≤ 4"
(102 mm)