Delta VFB25AX, VFB25ACH, VFB25ADH, VFB25AEH manual Duct Connection

3.Type II – 16 inches between joists Fig. D-02

Suspension			Suspension
Bracket III			Bracket II
	Suspension	Body
	Bracket I

Fig. E-02

Joist Joist

3-1. Insert the suspension bracket into the bracket cover of adaptor side and the back of the fan body.

3-2. Insert the fan between joists. Make sure the fan body is level and perpendicular with the joist.

3-3. Ensure the distance between ceiling and fan body for the thickness of grille.

3-4. Secure the suspension bracket to joists by using screw.

3-5. Secure the suspension bracket to fan body by using screw.

3-6. Follow step 6 to 9 of installation to complete the installation work.

4. Type III – 19.2 inches between joists

Fig. D-03

5.Type IV – 24 inches between joists Fig. D-04

SuspensionSuspension

Bracket IIIBracket II

Suspension Body

Bracket I

Fig. E-04

JoistJoist

5-1. Insert the suspension bracket into the bracket cover of adaptor side and the back of the fan body.

5-2. Insert the fan between joists. Make sure the fan body is level and perpendicular with the joist.

5-3. Ensure the distance between ceiling and fan body for the thickness of grille.

5-4. Secure the suspension bracket to joists by using screw.

5-5. Secure the suspension bracket to fan body by using screw.

5-6. Follow step 6 to 9 of installation to complete the installation work.

6. Duct Connection

Suspension

Bracket IIISuspension

Bracket II

Suspension Body

Bracket I

Fig. E-03

Tape

Body

Ceiling

Grill

Inside Outside

Duct

	Gradient
	1°~2°
Inspection Hole

Joist

Joist

4-1. Insert the suspension bracket into the bracket cover of adaptor side and the back of the fan body.

4-2. Insert the fan between joists. Make sure the fan body is level and perpendicular with the joist.

4-3. Ensure the distance between ceiling and fan body for the thickness of grille.

4-4. Secure the suspension bracket to joists by using screw.

4-5. Secure the suspension bracket to fan body by using screw.

4-6. Follow step 6 to 9 of installation to complete the installation work.

6-1. Insert the duct into the duct connector and tape all ductworks connection to make them secure and air tight.

6-2. Install the duct with a gradient 1°~2° to the outside.

3