Viessmann WB1A Series Installation And Service Instructions Manual page 46

Initial Start-up, Inspection and Maintenance Initial Start-up, Inspection and Maintenance
Steps
(continued)
S
Start-up
ervice
S
Start-up
ervice
46
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1. Fill and vent heating system (continued)
5. Check system pressure.
6. Ensure proper/adequate fuel supply
exists. Open gas shutoff valve.
Max. boiler
operating pressure
Min. boiler
operating pressure
Pressure relief valve ......30 psig
2. Check power supply connection
A power module is supplied with the
Vitodens 100-W boiler, which requires
a 120 VAC power supply.
The voltage at connector X3 must be
120 V (see wiring diagram).
Neutral conductor
The electrical power supply must have
a neutral conductor.
......45 psig
......14 psig
IMPORTANT
In Canada all electrical wiring is to be
done in accordance with the latest
edition of CSA C22.1 Part 1 and/or
local codes. In the U.S. use the
National Electrical Code ANSI/NFPA
70. The heating contractor must also
comply with both the Standard for
Controls and Safety Devices for
Automatically Fired Boilers, ANSI,
ASME CSD-1.
Please note:
The outer conductor "L" and the
neutral conductor "N" must not be
interchanged.
See wiring diagram in section entitled
"Additional Information" in this
manual.