Installation guide

Eclipse RatioMatic v3.10 - Installation Guide No. 110, 7/1/03 33
RatioMatic
Main Gas Shutoff
Valve Train
Gas Cock
Solenoid Valve
(normally closed)
Fuel Orifice Meter
Adjustable Limiting
Orifice
Pressure Regulator
Eclipse Combustion, Inc.
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.
Fuel orifice meters are used
to measure gas flow.
Adjustable limiting orifices are
used for fine adjustment of
gas flow.
NC
KEY TO SYSTEM
SCHEMATICS
These are the symbols used in the schematics.
756
710
760
910
684
742
Symbol Appearance Name Remarks Bulletin/
Info Guide
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.
A pressure regulator reduces
gas pressure to a stable,
usable pressure.
Ratio Regulator