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5790 733 - 07
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Installation
Gas Connections
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
Built-in low gas pressure switch
G
Gas pressure regulator
H
High gas pressure switch
I
Test firing valve
J
Direct spark ignition burner with Venturi
K
Fan pressure switch to low fire gas pressure regulator
1
*
7
1
a
in. for individual burner sections
2
*
7
2
b
in. for Vitocrossal 300, CA3 models 2.5, 3.0,
3.5 and 4.0
7
3 in. for Vitocrossal 300, CA3 models 5.0 and 6.0
Honeywell combination gas valve assembly
model V4734C1010-1100-1
Additional components
may be required as
specified by:
248-CMR-7:00,
N.B.C., NFPA 54
and/or ANSI Z223.1
Honeywell combination gas valve assembly
model V4734C1010-1100-1
Honeywell combination gas valve assembly
model V4734C1010-1100-1
Legend
A
Gas shut-off valve
B
Low gas pressure switch
C
High gas pressure switch
D
Fan pressure switch
E
Test fire valve
F
Venturi
Legend
1
Burner section 1, lead
2
Burner section 2, lag 1
3
Burner section 3, lag 2
(applies for Vitocrossal 300, CA3 models 5.0 and 6.0)
Note:
Each burner control requires a manual reset of low
gas pressure conditions, done at the section control
unit or at the burner control.
