Proper Piping Practice; Gas Connection And Piping - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Connections
(continued)

Proper piping practice

2 imperfect threads Use moderate amount of dope
Thread pipe right length Leave 2 end threads bare
Fig. 15

Gas connection and piping

¨
Fig. 16
Legend
Water supply connection
Condensate drain connection
Gas connection
Water return connection
Boiler Connections
Support piping by proper suspension
method. Piping must not rest on or be
supported by boiler.
1. Make gas connection in accordance
with codes CAN/CSA B149.1 or 2 in
Canada. In the United States, use
the National Fuel Gas Code ANSI
Z223.1/NFPA 54, as well as local
codes where applicable.
2. Close gas shutoff valve on boiler.
3. Perform leak test.
4. Bleed air from gas supply pipe.
See following page for details on gas
connection and piping.
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