Douglas BF 10-LPG Manual de instalación y uso - Página 5

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DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS

INSTALLATION USER INSTRUCTION MANUAL

Page 5 of 20

Installation of flue systems : (Continued)

The following photo sequence is intended to assist in simple installation without mistakes.

The Outer Air Duct is positioned through the wall first.

This is cut so that it is flush with the

inner wall or mounting escutcheon and may be flush with outer wall or extended slightly to suit

external siting requirements.

The Outer Air Duct is cut at the outer non-flanged-^

end and the amount cut is measured.

Cut the equivalent amount from the non-flared end of

the Inner Flue Duct. This will

ensure balanced fitting distances.

The External Wall Balanced Flue Assembly may be passed

carefully through the outer air duct after

it has been located in place. The Assembly is positioned

centrally and the attached spring loaded

chains are pulled back and hooked over the chain holding

brackets on the Outer Air Duct

Picture shows spring loaded chains stretched

Into place and hooked over brackets. External

Balanced Flue Assembly is not supported and Inner

Flue Duct may be slid into place with non-flared end

Engaging against stops on inside of Assembly Inner

Chamber. (A stop is shown here).