Viessmann Vitorond 100 VR1 Series Installation And Service Instructions Manual page 42

Riello Burner Set-up
Electrical Connections (with Vitotronic control)
WARNING
Electric shock hazard. Can cause severe personal injury
or loss of life if power source, including service switch
on boiler, is not disconnected before installing or servicing.
WARNING
RED wire not used in this application. DO NOT cut or
remove closed end connector from the wire. (Live 120VAC
at all times).
Legend
BL Blue
OG Orange
BK Black
W White
G Green/Ground
42
R Red
Y Yellow
V Violet
BR Brown
GY Gray
Vitorond 100, VR1-22 to -33 Installation and Service
(continued)
Installations must follow these codes and requirements:
- National Electrical Code, ANSI/NFPA 70, latest edition
and any addtional national, state or local codes.
- In Canada, CSA C22.1 Canadian Electrical Code Part 1
and any local codes.
- Wiring must be N.E.C. Class 1. If original wire as
supplied with boiler must be replaced, type 105°C
wire or equivalent must be used. Supply wiring to boiler
and additional control wiring must be 14 ga. or heavier.
- Provide electrical ground at boiler as required by codes.
WARNING
Ensure that the burner cycles ON and OFF on proper
call for heat before leaving the job site. Failure to do so
may lead to boiler runaway situation, which may lead to
property damage, personal injury or death.