Appendices 87
WARNING
●
Do not adjust or attempt to measure gas valve outlet
pressure. The gas valve is factory-set for the correct
outlet pressure. This setting is suitable for natural gas and
propane, requiring no field adjustment.
●
Attempting to alter or measure the gas valve outlet
pressure could result in damage to the valve, causing
potential severe personal injury or substantial property
damage. Navien NCB700 boilers are shipped ready to fire
natural gas only.
Packing
Packing
Gas Orifice
Figure 5-1. Exploded View of Gas Pipe Assembly
(NCB700-2S+/42K)
Packing
O-ring
Gas Orifice
Figure 5-2. Exploded View of Gas Pipe Assembly
(NCB700-3S/54K)
DANGER
See Figure 5-2. Inspect the O-ring between the venturi and
gas valve inlet adapter whenever they are disassembled.
The O-ring must be in good condition and must be installed.
Failure to comply will cause a gas leak, resulting in severe
personal injury.
