Greenheck Fan 452413 manual Installing Duct Collars, Back View of the Hood

Installing Duct Collars

1.The exhaust duct connection needs to be located within 48 in. (121.92 cm) from the center of the hood length to the center of the duct connection. (see Fig. 24, back view Fig. 25)

2.The exhaust duct connection is to be a continuous liquid- tight weld. Weld with a non-ferrous filler wire, such as silicon bronze or stainless steel filler wire. Protect all stainless steel areas from weld splatter.

3.The supply duct connection is tack- welded at 1 to 2 in.

(2.54 to 5.08 cm) intervals, or sheet metal screws at 3 to 6 in.

(7.62 cm to 15.24 cm) spacing to the hood. (Fig. 26)

4.The deflector is centered under the supply duct collar. (Fig. 28)

5.For hoods that are insulated, the edges of the insulation need to be taped after the hole is cut, (the insulation tape is to be provided by others).

6.On combination hoods, make sure the fire damper is located over the internal supply chamber. (Fig. 29)

		Hanger Bracket
			3.00
		Exhaust Plenum	14.00
		Duct Cut Out Area	Hood Width
			16.00
		Supply Plenum
		Front of Hood	3.00
8.00			8.00
		Hood Length
Top View of the Hood			Fig. 24
	8.00	Hood Top	8.00
1.00
12.00		Exhaust Plenum

	Duct Cut Out Area
Back View of the Hood	Fig 25

	INTERNAL	SUPPLY
		FIRE DAMPER
	SUPPLY
SUPPLY DUCT
	CHAMBER
CONNECTION
		HOOD

SUPPLY DUCT CONNECTION TO BE TACK WELDED WITH 1" TO 2" TACKS OR SHEET METAL SCREWS AT 3" TO 6" SPACING TO HOOD.

		INSULATED
		SUPPLY PLENUM
Fig. 26	EXHAUST	Fig. 27
	CAPTURE
Fig. 28
		Note: UL listed hood
		assembly to be used
		only with Greenheck
		Fan Corp. labeled
		subassembly for
		exhaust hood without
DEFLECTOR TO BE PLACED CENTERED		exhaust damper part
UNDER THE SUPPLY DUCT COLLAR		Number DC.

16 Canopy Hood

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