Greenheck MBD-15 Installation Manual

CLOSED

OPEN

EXTENSION PIN

REAR VIEW

CONTROL SHAFT

Document Number 464599

NOTE: FOR DAMPERS INSTALLED IN DUCTS

Extended Control Shaft is installed from outside of duct after damper is installed. Install as shown below.

TOOLS REQUIRED:

5⁄16 in. Hex Nut Driver

⁄8 in. Electric Drill

⁄2 in. Open End Wrench

Kit Part Number

⁄2 in. Extension Pin Kit & Part #828599

Manual Quadrant Kit

⁄2 in. Extension Pin Kit Part Numbers

No. Qty. Description 1 1 Stand off bracket Part #651812 2 1 Extension pin Part #463676 3 1 Retaining clip Part #451738 4 1 1/2 in. (13mm) manual quadrant Part #455648 5 1 Open and close labels 6 2 Tek screws 9 1 Washer Part #416338)

MBD-15

Extension Pin Kit &

Manual Quadra

FIELD INSTALLATION INSTRUCTIONS

Crossover Blade

Axle

(Do not attach

Control Shaft here!)

Before Installing Damper in the Duct

1. If damper has more than one blade, determine which blade axle will be driven by the extended control shaft. Always attach extended control shaft to a blade axle which is directly connected to the main linkage tiebar. DO NOT attach extended control shaft to a crossover blade axle.

2. Cut hole approximately 1 in. in diameter in the duct where damper drive blade axle will be located. Hole must provide clearance for enlarged portion of extended control shaft.

After Damper Is Installed in Duct

1. Push extended control shaft through hole in the duct and onto drive blade axle. Retainer clip should "click" into groove on drive blade axle and hold shaft into place. Standard Control Shaft location is the third blade from the bottom on dampers with three or more blades. Control Shaft location is the first blade from the bottom on dampers with one or two blades.

2. Install the stand off bracket with washer over the extended control shaft and screw bracket to duct. Make sure screws do not interfere with damper linkage or blade movement. Assemble Manual Quadrant to extension bracket assembly (screws provided).

3. With damper either fully open or closed, lock manual quadrant to extended control shaft so manual quadrant can move damper between open and closed. Note: Tighten down bolt on manual quadrant to 250 in. lb. of torque. Apply "OPEN" and "CLOSED" labels if damper movement is opposite to that engraved in the manual quadrant.

4. Set damper to desired position and tighten wing nut on manual quadrant to hold damper in place.

Caution

Stand off bracket with washer is needed to support the extended control shaft. If not installed as directed, the extended control shaft may not operate the damper correctly.

Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com