Product Manual

- 10 -

COMBUSTION AIR ADJUSTMENTS:

NOTE: Proper combustion air adjustment must be achieved using a certified

combustion analyzer to ensure complete combustion.

The air adjustment should be made to achieve 10% CO

on natural gas and

12% CO

on propane.

SETTING THE AIR ADJUSTMENT PLATE

A) Regulation of the combustion air flow is made by adjustment of the manual AIR

ADJUSTMENT PLATE (1) after loosening the FIXING SCREWS (2 and 3). The initial

setting of the air adjustment plate should be made according to Column 5 in the Burner

Set-up Chart.

B) The proper number on the manual AIR

ADJUSTMENT PLATE (1) should line up with the

SETTING INDICATOR (4) on the fan housing

cover. Once set, the air adjustment plate should be

secured in place by tightening SCREWS 2 and 3.

C) The final position of the air adjustment

plate will

vary on each installation. Use instruments to

establish the proper settings for maximum CO

NOTE: Variations in flue gas, CO

and

temperature readings may be experienced when the

burner cover is put in place. Therefore, the burner cover must be in place when making

the final combustion instrument readings, to ensure proper test results.

BURNER SET-UP CHART

1 2 3 4 5

FIRING RATE

(BTUH)

ORIFICE-LP

ORIFICE-NG

HEAD

SETTING

AIR DAMPER

SETTING

200,000

PART #

FVP-225

PART #

FVN-226

3 LP

3.8 NG