Viessmann VITOCROSSAL 300 Technical Data Manual page 27
For operation with natural gas and liquid propane gas
floor mounted, gas-fired condensing boiler
heating input 19 to 199 mbh
5.6 to 58 kw
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Also See for VITOCROSSAL 300:
- Service instructions manual (164 pages) ,
- Service instructions for contractors (148 pages) ,
- Service manual (108 pages)
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Vitocrossal 300 CU3A 26 to 57 Technical Data
Electrical Connections
Legend
1
Outdoor Temperature Sensor
2
Supply Temperature Sensor/Low Loss Header
3/1
Boiler Temperature Sensor #1
3/2
Boiler Temperature Sensor #2
5
DHW Temperature Sensor
11
Ionization Electrode
15
Flue Gas temperature Sensor
20
Boiler Pump
21
DHW Pump
28/20 Programmable Pump Output*
35
Gas Valve
40
Power Supply
40A
Accessory Power Output
54
Ignition Transformer
96
Powered Accessory Connection
100
Fan Motor
100A Fan Motor Control
111
Not Used
145
KM BUS
147
Pump Modulation Output 0-10VDC
Multi
Powered Accessory Connection
156A Switched Output F2
156B
Switched Output F1
DE1
Digital Input 1 (Dry Contact)
DE2
Digital Input 2 (Dry Contact)
DE3
Digital Input 3 (Dry Contact)
0-10V 0-10VDC Input
157
Fault Alarm/DHW Recirculation Pump*
190
Gas Modulation Coil
* See wiring diagram
Boiler Control
A
External Accessory Connection Board
B
Power/Pump Connection Interface
C
Integrate EA1 Module
D
KM-BUS for External Devices
E
Electrical Junction Box
F
Field Wiring Connections
G
A1 Main Board
A2 Internal Power Supply Unit
A3 Optolink
A4 Burner Control Unit
A5 Programming Unit
A6 Coding Card
A7 Connection Adaptor
A8 LON Communication Module
S1 ON/OFF Switch
S2 Reset Button
X.. Electrical Interface
(continued)
Installation Examples
27
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