Eclipse ThermAir T/A Series v1.10, Installation Guide No. 114, 4/7/06
1
ThermAir
Main Gas Shutoff
Valve Train
Gas Cock
Solenoid Valve
(normally closed)
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.
Adjustable limiting orifices are
used for fine adjustment of gas
flow.
NC
k
ey
to
s
ystem
s
ChematiCs
These are the symbols used in the schematics.
756
710
760
684
742
Symbol
Appearance
Name
Remarks
Bulletin/
Info Guide
The ratio regulator adjusts the gas
flow in ratio with the air flow. It
contro;s the outlet pressure equal
to the impulse line pressure. The
impulse line is connected between
the top of the ratio regulator and
the blower housing.
A pressure regulator reduces
gas pressure to a stable, usable
pressure.
Ratio Regulator
Automatic Gas
Control Valve
An automatic gas control valve
adjusts gas flow to the burner
based on control system
requirements.
720
Impulse Line
--------
730