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5833 275 - 04
Vitotrans 300 Installation, Operating and Service
Wiring Diagram
-
S3HA 90 and D3HA 90
Wiring
If any of the original wires as supplied with the appliance
must be replaced, it must be replaced with the exact
equivalent.
WARNING
DISCONNECT POWER BEFORE SERVICING THE VITOTRANS.
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
Electrical Installations must comply with:
In the USA National Electric Code (NEC), ANSI/NFPA
70 and any other national, state and local codes and/or
regulations.
In Canada, the Canadian Electrical Code (CEC), CSA
C22.1 Canadian Electrical Code Part 1 and any other
province, territory, local codes and/or regulations.
Legend
A
Power supply 240VAC/1Ph/60 Hz L1/L2/N/G
B
Boiler demand (dry contact)
C
Building DHW re-circulation pump (dry contact)
D
DHW storage tank (dry contact)
E
BACnet (IP) communication RJ45
F
DHW storage tank temperature sensor
Heating system pump (head 1)
Heating system pump (head 2)
H
Internal de-scaling pump
I
Domestic cold water flow sensor
J
Manual reset fixed high limit 210ºF (99ºC )
K
DHW temperature sensor
L
DCW temperature sensor
M
System return temperature sensor
N
Touch screen user interface
O
Main disconnect switch
P
Control PLC
Q
Fuse, T 0.5A/250VAC
R
Fuse, F 4A