Viessmann VR1 22 Installation And Service Instructions Manual page 34

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.
Installations must follow these codes and requirements:
- National Electrical Code, ANSI/NFPA 70, latest edition
and any additional 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.
Beckett burner
34
Vitorond 100, VR1 22 to 33, 91 to 140 Installation and Service
(continued)
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, property damage, and
personal injury or death.
IMPORTANT
If burner lock-out occurs, verify a blocked vent safety
switch operation first.