Eclipse Winnox WX Series Installation Manual page 20

Appendix
Key to System Schematics
These are the symbols used in the schematics.
Symbol Appearance
Main gas
shut-off
valve train
NC
20
Name
Winnox
Main Gas Shut-Off Valve Train
Gas Cock
`
Solenoid Shut-Off Valve
(Normally Closed)
Pressure Regulator
Ratio Regulator
Remarks
Eclipse strongly endorses NFPA
as a minimum.
Gas cocks are used to manually
shut-off the gas supply on both
sides of the main gas shut-off
valve train.
Solenoid valves are used to
automatically shut off the gas
supply on a bypass gas system or
on small capacity burners.
The pressure regulator reduces
gas pressure to a stable, usable
pressure.
A ratio regulator is used to control
the air/gas ratio. The ratio
regulator is a sealed unit that
adjusts the gas flow in ratio with
the air flow. To do this, it measures
the air pressure with a pressure
sensing line, the impulse line. This
impulse line is connected between
the top of the ratio regulator and
the burner body.
Eclipse Winnox Burner, WX Series, V2, Installation Guide 111, 2/26/2010
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