Beckett AFII manual Fire, Smoke & Asphyxiation Hazard, Air Tube Combinations ATC & Dimensions

Section: Inspect/Prepare Installation Site

Table 2 – Air Tube Combinations (ATC) & Dimensions

ATC codes for usable air tube lengths dim. “A” (Figure 3)

Firing rate range (gph)Min-Max

3”

5”

7”

9”

ATC Code

Head

AFII 85

AFII 100

AFII 150

Adjustable screww/stop

DesignHead

HLX30

HLX50

HLX70

HLX90

HB

AF2-6

0.4-0.85 gph

0.65-1.00 gph

0.75-1.35 gph

HLX30

HLX50

HLX70

HLX90

HC

AF2-9

N/A

0.65-1.00 gph

0.75-1.50 gph

HLX30

HLX50

HLX70

HLX90

HD

AF2-6

0.40-0.85 gph

0.65-1.00 gph

0.75-1.10 gph

HLX30

HLX50

HLX70

HLX90

HE

AF2-9

N/A

0.65-1.00 gph

0.75-1.35 gph

DesignHead

FBX30

FBX50

FBX70

FBX90

HFXS

FB0

0.40-0.65 gph

0.55-0.75 gph

0.75-1.00 gph

Fixed-

FBX30

FBX50

FBX70

FBX90

HGXS

FB3

0.55-0.85 gph

0.55-1.10 gph

0.85-1.20 gph

FBX30

FBX50

FBX70

FBX90

HHXS

FB4

N/A

0.75-1.10 gph

1.10-1.25 gph

FBX30

FBX50

FBX70

FBX90

HIXS

FB6

N/A

0.85-1.15 gph

1.15-1.35 gph

HB 6 slot HC 9 slot HD 6 slot HE 9 slot

Table 3 – Minimum Combustion Chamber Dimensions (inches)

Firing	Round	Rectangular			Floor to
Rate				Height
	I.D.	Width	Length		nozzle
(gph)
0.50	8	7	8	12	5 to 6
0.75	9	8	9	12	5 to 6
1.00	10	9	10	12-1/2	5 to 6
1.25	11	10	11	12-1/2	5 to 6
1.50	12	11	12	13	6 to 7

3.Any accumulation of soot or debris in chimney offsets should be removed

4.Any obstructions such as a protruding joint or a piece of broken tile wedged in the chimney should be removed.

5.No other appliance connection should be made to the same flue pipe.

6.The flue pipe should have an upward pitch toward the chimney of at least 1/4” per foot of length. It should fit tightly and should not project into the chimney.

7.Any leakage between tiles, around clean-out doors, or around the vent pipe should be sealed.

INSULATED STAINLESS STEEL CHIMNEY LINERS

Fire, Smoke & Asphyxiation

Hazard

yCarefully inspect the chimney or exhaust vent system.

yMake sure it is properly sized and in good working condition.

yFollow the instructions supplied by the appliance manufacturer.

yThe installation must strictly comply with all applicable codes, authorities having jurisdiction and the latest revision of the National Fire Protection Association Standard NFPA 31 for the installation of chimneys and vent sizing, (or CSA-B139 and CSA- B140 in Canada).

yRegulation by these authorities take precedence over the general instructions provided in this installation manual.

The new designs of high efficiency oil furnaces and boilers in conjunction with flame retention oil burners are more efficient. One result of increased efficiency is lower flue gas temperatures. As flue gases rise in the chimney, they will cool and condense when they reach the dew point. The condensation will mix with the sulphur in the flue gases creating sulphuric acid. The acid will attack the chimney mortar, brick and clay liners causing corrosion, deterioration and blockage of the chimney.

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