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)

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.
Legend
A Cable strap (supplied)
B Hydrostat 3250-Plus
C Burner wiring harness (supplied)
WARNING
Ensure that burner wiring harness is properly attached
and secured to the boiler side panel using the supplied
cable straps as depicted above. The cable strap must
be coiled on the boiler side panel so that no slack is left,
allowing the burner/boiler door to be swung open without
disconnecting the burner wiring harness from the burner.
Failure to heed this warning may result in personal injury.
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.
All field supplied nominal 120 VAC voltage wiring must
g
be sheathed in a flexible metal conduit.
Disconnect means, overload protection and low water
g
cut-off must be provided as required by local codes.
Connect incoming line voltage HOT (L1) wire to
g
terminal L1, and N to terminal L2 of the Hydrostat
3250-Plus control (see wiring diagram on page 29).
Burner wiring (Beckett)
IMPORTANT
The R7184 or GeniSys 7505P primary control with
valve-on delay (pre-purge) and burner motor-off delay
(post-purge - factory default settings can be field
adjusted), requires a constant 120 VAC power source
supplied to the BLACK wire on the control (see wiring
diagram on pages 29).
1. The cover mounting plate is not a conduit connection
point. Pass conduit and attached connector through
the front opening in the mounting plate or through
one of the knockouts on either side of the cover and
attach it directly to the burner-mounted 4x4 electrical
junction box.
Room thermostat wiring
1. Install thermostat on inside wall away from influences
of drafts, hot or cold water pipes, lighting fixtures,
television, sun rays or fireplaces.
2. Follow instructions supplied with room thermostat.
If it has a heat anticipator, set heat anticipator in
thermostat to match power requirements of
equipment connected to it. Boiler wiring diagrams
give setting for standard equipment.
Beckett Burner Set-up
27