Installation guide

ManualsBrandsEclipse ManualsBurnerRatioMatic RM Series

Eclipse RatioMatic v3.10 - Installation Guide No. 110, 7/1/03

Low fire air adjustment procedure:

1. Start combustion air blower.

2. Drive control motor to low fire position.

3. Measure air differential pressure between tap (C ) and

combustion chamber.

Note:

The pressure tap is in the open position when the screw

inside the tap is unscrewed approximately 1/2 turn. Do not

remove screw. Be sure to tighten pressure tap screw

clockwise to the closed position after pressure

measurements have been taken.

4. Set low fire air.

a. Loosen the set screw n on burner side of coupling o.

Note:

There is a slot in the end of the BV shaft that is parallel to

the air damper. This slot is used for visual indication of the

BV position. The BV is closed when the shaft slot is

perpendicular to the direction of air flow through the BV.

b. Rotate air BV shaft to fully closed position. (Holes in

BV damper will supply low fire air.)

Note

When firing into a positive chamber pressure, rotate the air

BV from closed position in the direction of actuator travel to

obtain a minimum 0.2” w.c. (0,5 mbar) air differential

pressure.

c. Hold BV shaft firmly in place and tighten set screw 1 .

Note:

High fire air adjustment is not required if burner is firing

into a neutral pressure chamber and a 90° travel control

motor is used.

It may be necessary to limit control motor stroke to less

than 90° if firing into a large positive or negative chamber.

Contact your Eclipse Combustion representative for further

information.

5. Verify high fire air

a. Drive control motor to high fire, full open.

Compare the high fire air differential pressure between

tap (C) and the combustion chamber to the appropriate

data sheet chart “Air ∆P vs. Air Flow.”

If high fire air is

insufficient, refer to Section 5, Troubleshooting and

Maintenance, in this document.

6. Return the control motor to the low fire position.

7. Close the pressure taps.

Air BV Adjustment

Step2: Set low fire air

BV shaft shown in

closed position

Air BV Shaft

To Chamber

Tap C

Air Differential Pressure