Wiring Schematic Diagrams

Download our wiring diagrams for our complete range of Bosch controls and modules.

For further information, or for technical support,

please call 0330 123 3004 or e-mail commercial.industrial@uk.bosch.com

4122 Control schematics

The key explains what each number represents in the document title of the table.

Key

  • Master controller.
  • Number of boilers used.
  • Domestic hot water used - 0=no. 1=yes.
  • Number of un-mixed heating circuits.
  • Number of mixed heating circuits.

Example

  • 4122-1-0-1-1
  • 4122 = Master Controller.
  • 1 = Number of boilers used.
  • 0 = Domestic hot water is not used.
  • 1 = Number of un-mixed heating circuits.
  • 1 = Number of mixed heating circuits

Control Schematics
4122-1-1-1-4
4122-2-0-0-3 GB312
4122-2-1-0-2
4122-2-1-1-2
4122-3-1-0-2 + Solar
4122-6-0-1-3
4122-6-0-2-0
4122-6-1-1-1
4122-6-1-1-3
4122-8-0-2-0

4121 Control schematics

The key explains what each number represents in the document title of the table.

Key

  • Master controller.
  • Number of boilers used.
  • Domestic hot water used - 0=no. 1=yes.
  • Number of un-mixed heating circuits.
  • Number of mixed heating circuits.

Example

  • 4121-1-0-1-1
  • 4121 = Master Controller.
  • 1 = Number of boilers used.
  • 0 = Domestic hot water is not used.
  • 1 = Number of un-mixed heating circuits.
  • 1 = Number of mixed heating circuits

Control Schematics
4121-1-0-1-1
4121-1-1-0-1 Unvented Protection
4121-1-1-0-1
4121-1-1-0-1+Solar
4121-1-1-1-0 Unvented Protection
4121-1-1-1-0
4121-1-1-1-1
4121-1-1-1-3
4121-2-0-0-2+BFU
4121-2-0-1-0
4121-2-0-1-0 GB312
4121-2-1-0-0
4121-2-0-1-1
4121-2-1-0-1
4121-2-1-1-1
4121-3-1-1-1
4121-2-1-2-0
4121-2-1-2-1
4121-3-1-2-0
4121-3-0-2-0
4121-3-1-2-1
4121-4-0-1-2
4121-4-0-2-1
4121-4-1-1-1
4121-4-1-2-0
4121-4-1-2-1

4211 Control schematics

The key explains what each number represents in the document title of the table.

Key

  • Master controller.
  • Number of boilers used.
  • Domestic hot water used - 0=no. 1=yes.
  • Number of un-mixed heating circuits.
  • Number of mixed heating circuits.

Example

  • 4211-1-0-1-1
  • 4211 = Master Controller.
  • 1 = Number of boilers used.
  • 0 = Domestic hot water is not used.
  • 1 = Number of un-mixed heating circuits.
  • 1 = Number of mixed heating circuits

Control Schematics
4211-1-1-1-0
4211-1-1-1-2

4212 Control schematics

The key explains what each number represents in the document title of the table.

Key

  • Master controller.
  • Number of boilers used.
  • Domestic hot water used - 0=no. 1=yes.
  • Number of un-mixed heating circuits.
  • Number of mixed heating circuits.

Example

  • 4212-1-0-1-1
  • 4212 = Master Controller.
  • 1 = Number of boilers used.
  • 0 = Domestic hot water is not used.
  • 1 = Number of un-mixed heating circuits.
  • 1 = Number of mixed heating circuits

Control Schematics
4212-1-HDR1
4212-1-HDR2
4212-2-Cascade
4212-3-Cascade

4321 Control schematics

The key explains what each number represents in the document title of the table.

Key

  • Master controller.
  • Number of boilers used.
  • Domestic hot water used - 0=no. 1=yes.
  • Number of un-mixed heating circuits.
  • Number of mixed heating circuits.

Example

  • 4321-1-0-1-1
  • 4321 = Master Controller.
  • 1 = Number of boilers used.
  • 0 = Domestic hot water is not used.
  • 1 = Number of un-mixed heating circuits.
  • 1 = Number of mixed heating circuits

These diagrams are also the same for the 4322 control.

Control Schematics
4321-2-0-0-0 0-10 Volt
4321-2-0-0-0
4321-2-0-0-0 Volt Free
4321-3-0-0-0
4321-3-1-1-2
4321-4-0-0-2
4321-4-1-1-2
4321-6-0-0-2
4321 Saftey Chain with alarm
4321 Saftey Group

4323 Control schematics

The key explains what each number represents in the document title of the table.

Key

  • Master controller.
  • Number of boilers used.
  • Domestic hot water used - 0=no. 1=yes.
  • Number of un-mixed heating circuits.
  • Number of mixed heating circuits.

Example

  • 4323-1-0-1-1
  • 4323 = Master Controller.
  • 1 = Number of boilers used.
  • 0 = Domestic hot water is not used.
  • 1 = Number of un-mixed heating circuits.
  • 1 = Number of mixed heating circuits

Control Schematics
4323-5-1-1-1
4323-6-1-1-1
4323-7-1-1-1
4323-8-1-1-1
4323-8-1-1-3

8000 Control schematics

The key explains what each number represents in the document title of the table.

Key

  • Number of boilers
  • Number of constant temperature heating circuits
  • Number of variable temperature heating circuits
  • Number of domestic hot water circuits
  • Type of boiler the drawing applies to

Example

  • 1B-1CT-1DHW-GB162
  • 1B = 1 Boiler.
  • 1CT = 1 Constant Temperature Heating Circuit
  • 1DHW = 1 Domestic Hot Water Circuits
  • GB162

Control Schematics
1B-1CT-1DHW-C7000F
1B-1CT-1DHW-GB162
1B-1CT-1VT-1DHW-C7000F
1B-1CT-1VT-1DHW-GB162
1B-1CT-1VT-2DHW-GB162
1B-1CT-2VT-2DHW-C7000F
1B-1CT-2VT-2DHW-GB162
1B-1VT-1DHW-C7000F
1B-1VT-1DHW-GB162
1B-3VT-1DHW-C7000F
1B-3VT-1DHW-GB162
2B-1CT-1DHW-C7000F
2B-1CT-1DHW-GB162
2B-1CT-1VT-2DHW-GB162
2B-1CT-2VT-2DHW-GB162
2B-1VT-1DHW-GB162
3B-1CT-1DHW-GB162
3B-1VT-1DHW-GB162

8000 Control Function Modules

The key explains what each number represents in the document title of the table.

Control Schematics
FM-AM
FM-MM
FM-MW
FM-SI

EM10 Control Schematics

The key explains what each number represents in the document title of the table.

Key

  • Master controller.
  • Number of boilers used.
  • Domestic hot water used - 0=no. 1=yes.
  • Number of un-mixed heating circuits.
  • Number of mixed heating circuits.

Example

  • EM10-1-0-1-1
  • EM10 = Master Controller.
  • 1 = Number of boilers used.
  • 0 = Domestic hot water is not used.
  • 1 = Number of un-mixed heating circuits.
  • 1 = Number of mixed heating circuits

Control Schematics
EM10-1-0-0-0 GB312
EM10-1-0-0-0
EM10-2-0-0-0 GB312
EM10-2-0-0-0

MCM10 Control Schematics

The key explains what each number represents in the document title of the table.

Key

  • Master controller.
  • Number of boilers used.
  • Domestic hot water used - 0=no. 1=yes.
  • Number of un-mixed heating circuits.
  • Number of mixed heating circuits.

Example

  • MCM10-1-0-1-1
  • MCM10 = Master Controller.
  • 1 = Number of boilers used.
  • 0 = Domestic hot water is not used.
  • 1 = Number of un-mixed heating circuits.
  • 1 = Number of mixed heating circuits

Control Schematics
MCM10-4-0-10 vdc
MCM10-4-230 vac
MCM10-4-Volt Free

RC35 Control schematics

The key explains what each number represents in the document title of the table.

Key

  • Master controller.
  • Number of boilers used.
  • Domestic hot water used - 0=no. 1=yes.
  • Number of un-mixed heating circuits.
  • Number of mixed heating circuits.

Example

  • RC35-1-0-1-1
  • RC35= Master Controller.
  • 1 = Number of boilers used.
  • 0 = Domestic hot water is not used.
  • 1 = Number of un-mixed heating circuits.
  • 1 = Number of mixed heating circuits

Control Schematics
RC35-1-0-1-1
RC35-1-1-0-1
RC35-1-1-1-0
RC35-1-1-1-1
RC35-1-1-1-1
RC35-1-1-1-1+Solar
RC35-1-1-1-2
RC35-1-1-1-2+RC25
RC35-1-1-1-3