Gas Connections - Viessmann Vitocrossal 200 Installation Instructions Manual

Boiler

Gas Connections

24
Additional components
may be required as
specified by:
248-CMR-7:00,
N.B.C., NFPA 54 and/or
ANSI Z223.1
Vitocrossal 200 CM2 186 to 311 Installation
Legend
A Gas shut-off valve
B Aux. low gas pressure switch
C Low gas pressure switch
D High gas pressure switch
E Fan pressure switch
F Test fire valve
G Venturi
Honeywell combination gas valve
assembly model V4734C1010-1100-1
Legend
A Field supplied and installed gas shut-off valve
B Field supplied and installed union
C Field supplied and installed service gas pressure
regulator (required for all installations)
D Field supplied and installed union
E Gas shut-off valve
F Aux. low gas pressure switch
G Built-in low gas pressure switch
H Gas pressure regulator
I High gas pressure switch
J Test firing valve
K Direct spark ignition burner with venturi
L Fan pressure switch to low fire gas pressure regulator
1* 1 in. for Vitocrossal 200-CM2-186
1a in. for Vitocrossal 200-CM2-246/311