120 V Ac Connection; Fault Indication; Electrical Connection Of The Outdoor Temperature Sensor; Electrical Connection Of The Supply Temperature Sensor - Bosch ICM Notice D'installation

3.2.2

120 V AC connection

CAUTION: The ICM module input is not
fuse-protected.
Overloading the outputs can damage the
ICM modules.
B Protect the ICM module power supply
(master) with a circuit breaker with
maximum rating 15 Amp.
B Only use electric cable of similar quality.
B Never power controllers that carry additional electric
loads to outputs C (pump) and D (fault signal).
CAUTION: Output C (pump) of the ICM
module has a maximum load capacity of
250 W.
B Use isolation relays to power greater
loads.
B Recommendation when using several ICM modules
(cascade with more than 4 boilers): Provide the
additional modules with power via the first ICM
module (master). This ensures simultaneous start-up.
NOTE:
B The maximum current drawn by the
system components (pump, etc.) must
not exceed specifications (
page 5).
3.2.3

Fault indication

The fault output can be used to signal the device status.
The NC pins are powered when no fault is present. The
NO pins are powered when a fault is present. (
terminal D, page 10). The fault LED on the ICM will light
when a fault is present and the relay is engaged.
( table 9, page 16).
Situation
Normal operation,
no fault present
Fault present or power
failure to the ICM
Table 8 Operating status contact
This is a dry contact that carries a maximum current of
2 A at 120 V AC.
table 2,
fig. 6,
Operating status contact
NOTE:
B The fault contact is activated when the
power supply to the ICM module is
interrupted (useful as a function check).
3.2.4 Electrical connection of the outdoor
temperature sensor
In conjunction with the Hydronic 3, always connect the
outdoor temperature sensor to the ICM module (master)
( fig. 6, page 10) and not to the boiler.
3.2.5 Electrical connection of the supply
temperature sensor
For system version 1, the common supply water
temperature sensor must be connected to terminals J
and for the system versions 2, 3 and 4, to the ICM,
terminal E ( fig. 6, [18], page 10).
3.2.6

External limit switch

Use terminal G ( fig. 6, [23], page 22) to connect an
external limit switch that interrupts all boiler operation
when interrupted. Remove jumper [23] when installing
an external limit.
3.2.7

Disposal

B Dispose of packaging in an environmentally-
responsible manner.
B When replacing components, dispose of the old parts
in an environmentally-responsible manner.
3.3

Installing other accessories

B Install accessories according to the legal
requirements and the installation instructions
supplied with them.
B The BUS subscribers must be connected to terminal J
( fig. 6, [23], page 10).
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