Viessmann Vitocrossal 300 CU3A 26 Installation Instructions Manual page 41

Vitocrossal 300 CU3A 26 to 199 Installation
Connections
(continued)
IMPORTANT
Electrical installations must comply with the latest edition of:
In the U.S.A., the National Electrical Code (NEC),
ANSI/NFPA 70 and any other state, local codes and/or
regulations.
In Canada, the Canadian Electrical Code (CEC),
CSA C22.1 Part 1 and any other province, territory,
local codes and/or regulations.
WARNING
Incorrectly executed electrical installations can lead to
injuries from electrical current and result in appliance
damage.
Boiler power supply connection
Note: See wiring diagram on page 57 for connection
Power/pump connection interface
If system components are not grounded, serious injury
from electric current can result if an electrical fault
occurs.
Connect the appliance and pipework to the
equipotential bonding of the building in question.
to the control base.
WARNING
Control Connections
41