Connecting The Bus Connection And Temperature Sensor (Low-Voltage Side) - Bosch Comfort Zone Manager 100 Instructions D'installation

Installation example for connecting power supply and 2 circulator
pumps in a heating systems with 2 zones:
1. Remove the metal conduit sheet from the CZM100 for ease of
installation. (recommended)
2. Pass the power supply cable through the 1st hole/conduit from the
left.
3. Unplug the connector for 120 V AC.
4. Connect the power supply cable to the connector. Mind the phases.
5. Pass the cable of the circulator pump in zone 1 through the 2nd hole/
conduit from the left.
6. Unplug the connector for the circulator pump in zone 1 (PZ1).
7. Connect the cable of the circulator pump in zone 1 to the connector.
Mind the phases.
6. 6.
3.
4.
1.
2.
Fig. 9 Connecting the cables on the line-voltage side
▶ Repeat steps 5., 6. and 7. for circulator pump in zone 2 accordingly
with connection PZ2 and the 3rd hole/conduit.
▶ Put the metal sheet back into its place.
▶ Put the plug connectors back to their places.
4.2.2 Connecting the BUS connection and temperature sensor
(low-voltage side)
▶ Use a junction box to connect the BUS users in the case of different
wire sizes.
▶ Wire the CRC user interface via a junction box [A] in a star
configuration ( Fig. 10) or in series for BUS users with at least 2
BUS connections ( Fig. 13, page 9).
A
2
B
U
S
CRC CRC
≥ 4"
(≥ 100 mm)
Fig. 10 Connecting several BUS users via a junction box
CZM100
7. 7.
5. 5.
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2
2
B B
U U
S S
CRC
≥ 4"
(≥ 100 mm)
If the maximum total length of the BUS connections
between all BUS users is exceeded or the BUS system
has a ring structure, commissioning of the system is not
possible.
Maximum allowable total length of all BUS connections with AWG 18
2
(0,75 mm ) wire: 492 ft. (150 m)
▶ To prevent inductive effects: Lay all low-voltage cables separately
from cables carrying line voltage.
The minimum separation should be 4" (100 mm).
▶ In the case of outside inductive effects use shielded cable. Do not
connect the shield to the connecting terminal for the ground
conductor in the CZM100; use the building ground instead, e.g.
unused grounded terminal or water pipe.
Install only one supply temperature sensor T0 per
system. T0 Sensor can be used in low loss header or in
system side of primary / secondary piping.
T0 sensor can be installed in the CZM100 or the
appliance. If several CZM100 are present, the CZM100
used to connect the supply temperature sensor T0 can
be selected at will.
Use the following cable types (wire sizes) when extending the sensor
lead:
• Up to 66 ft. (20 m) with AWG18 (0.75 mm
• 66 ft. (20 m) to 330 ft. (100 m) with AWG16 (1.50 mm
Installation example for connecting supply temperature sensor T0 and
3 Bus cables on a 2 zone heating system with 1 CRC200, 1 CRC100 and
1 BUS to Appliance.
1. Pass the cable of the supply temperature sensor through the second
hole from the right in the metal sheet.
2. Plug a connector into the slot for the temperature sensor (T0).
3. Connect the cable of the supply temperature sensor to the connector
(T0).
4. Pass the BUS cable connecting heat source (boiler) and CZM100
through the second hole from the right in the metal sheet.
5. Connect the BUS cable to the first BUS connector from the left (see
 Fig. 13, page 9)
2.
Fig. 11 Connecting the cables on the low-voltage side
▶ Repeat steps 3. and 4. for further BUS connections accordingly with
the other free BUS cables and BUS connectors.
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