750-382
CBT
1-5
Gas train
1.3 — Gas train
The gas train assembly is provided in accordance with UL/cUL certification and is ASME CSD-1 compliant. The
gas train assembly is factory assembled and wired.
Full modulation gas train components:
A. Single body, dual safety shutoff gas valve with integral trim regulator
B. Low Gas Pressure Switch
C. High Gas Pressure Switch
D. (2) Manual Shutoff Valves
E. Test Cocks
F. Venturi
G. Gas supply regulator (optional)
On/off gas train components:
H. Regulator
I. Low Gas Pressure Switch
J. Gas Solenoid Safety Shutoff Valve
K. Gas Diaphragm Safety Shutoff Valve
L. High Gas Pressure Switch
M. (2) Manual Shutoff Valves
VENTURI
OPTIONAL:
GAS PRESSURE REGULATOR
FIGURE 1-5. Gas train
C
B
D
E
D
A
FULL MODULATION (CBT-M)
ON/OFF (CBT)
I
H
M
L
K
J
M
F
G
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