Connecting The Outdoor Temperature Sensor; (Accessory); Connecting Additional Accessories - Bosch Greenstar combi 100 p Installation And Service Instructions For Contractors

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.
F
A
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.
Greenstar combi 100 p / 151 p
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)
6 720 641 933-35.1O
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.
6 720 641 933-91.1o
Fig. 40 Installation of the supply temperature sensor directly adjacent
[1]
[2]
[3]
[4]
[5]
LS NS
3
2
1
ϑ
≤ 4"
(102 mm)
to the boiler supply
System secondary line (heating) – Supply pipe
Supply temperature sensor for system supply pipe
Boiler primary line - supply pipe 1"
Boiler primary line – Return pipe 1"
System secondary line (heating) – Return pipe
Electrical connection | 33
B
B
4
2
1
F
A
TB1
6 720 641 933-44.1O
4
5
6 720 641 933-97.1o
6720872361 (2017/04)