Electrical Connections (With Hydrostat 3250-Plus Control) - Viessmann Vitorond 100 VR1 Series Installation And Service Instructions Manual

Vitorond 100, VR1-22 to -33 Installation and Service

Electrical Connections (with Hydrostat 3250-Plus control)

Legend
A Power supply, provide disconnect means and
overload protection as required.
B Control case must be connected to earth ground.
Use grounding provided.
C B1 is a in. tab terminal.
D Circulator
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.
IMPORTANT
Red wire not used in this application. Use wire nuts to
cap both ends (inside high limit control and Riello burner
sub- base).
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 (7°C) 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 (104°C).
Note: Used with standard venting.
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.
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
H
must be sheathed in a flexible metal conduit.
Disconnect means, overload protection and low water
H
cut-off must be provided as required by local codes.
Connect incoming line voltage HOT (L1) wire to
H
terminal L1, and N to terminal L2 of the Hydrostat
3250-Plus control (see wiring diagram).
Riello Burner Set-up
39