Wiring Diagram - Viessmann VITOROND 100 Installation And Service Instructions Manual

Burner

Wiring Diagram

(for Riello burner)
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.
All field supplied nominal 120 VAC voltage wiring must be sheathed in a flexible metal conduit.
"
Disconnect means, overload protection and low water cut-off must be provided as required by local codes.
"
Connect incoming line voltage HOT (L1) wire to terminal L1, and N to terminal L2 of the Honeywell high limit control (see
"
wiring diagram below).
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
CONTROL CASE MUST BE CONNECTED TO EARTH
GROUND. USE GROUNDING SCREW PROVIDED.
B1 IS 1/4 IN. TAB TERMINAL.
Female 3-pole plug Male 3-pole
Burner disconnect Burner disconnect
Burner harness
120 VAC field wiring
24 VAC field wiring
120 VAC factory wiring
Low voltage factory wiring
Legend
Burner motor
Capacitor
30
Installations must follow these codes
and requirements:
- National Electric 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.
Additional temperature
limit control (when
required by local
jurisdiction)
plug
Riello factory-wired
Riello
subbase
burner base
L1
Honeywell limit
control harness
BK Black
BL Blue
BRN Brown
GRD Ground
GRN Green
WH White
- 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.
N
Circulator
CAUTION
A field supplied manual reset high
limit control must be installed at the
outlet pipe of the boiler to interrupt
burner operation should the factory
supplied high limit control fail. This
field supplied high limit control must
be set 20°F above the setting of the
factory supplied high limit control.
The setting of this field supplied high
limit control must never be greater
than 220°F.