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Viessmann FDVS-4 Installation Instructions Manual page 12

Direct vent systems

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Burner - Riello
Burner Set-up (Riello)
Electrical connections (with Aquastat 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.
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 on page 12).
Fig. 10
Legend
Burner and control harness, (see
wiring diagram on page 12)
Cable strap (supplied)
Honeywell high limit control
12
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.
Burner wiring
1. Secure control harness
supplied cable straps
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.
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.
using 2
.

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