Proper Piping Practice; Gas Connection And Piping - Viessmann VITODENS 100-W WB1B Series Installation And Service Instructions Manual

Connections
(continued)

Proper piping practice

2 imperfect threads
Thread pipe right length
Fig. 15

Gas connection and piping

Fig. 16
Legend
A Water supply connection
B Condensate drain connection
C Gas connection
D Water return connection
Use moderate amount of dope
Leave 2 threads bare
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.
19