Eclipse RatioMatic RM Series Installationsanleitung PDF herunterladen (Seite 13)

Eclipse RatioMatic v3.10 - Design Guide No. 110, 12/01

All RatioMatics are assembled with a right-hand blower motor

orientation.

All standard RatioMatics are designed for:

• air:gas ratio controlled combustion.

• 10% to 15% excess air at high fire.

• higher excess air at low fire

Burner Control

RatioMatics come with a ratio regulator that maintains the

air:gas ratio.

Air Butterfly

Valve (BV)

Loading Line

Control Motor

Ratio

Regulator

Gas Flow

Heat

• A control signal is sent from a process temperature

controller (sold separately) to the control motor. (Refer to

Bulletin 818C or contact Eclipse Combustion for further

information on temperature controllers.)

Control

Signal

Gas Flow

Process

Set Point

Process

Controller

Control

Motor

Air

Ratio

Regulator

Temperature

Pressure

Impulse

• The control motor modulates the air butterfly valve (BV)

which controls the combustion air flow.

• Air pressure in the burner body sends an impulse down the

loading line to the ratio regulator.

• The ratio regulator controls the gas flow in proportion to the

air flow.

Warning:

Do not use other control methods, such as, a fixed-air

control, and do not alter the ratio regulator or

burner piping without prior approval from Eclipse

Step 3: Control

Methodology

Air/Gas Flow

Gas

Air

Stoichiometric

Excess air

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 19 20 21

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