Bowden Installation Instructions

Bowden Controllers/ Wire & Casing / B-Kits

YR-IOM-Bowden 9-2018

Step 1 Run Wire

1. Run the casing from the location where the

controller will be to the damper.

A. It should be as straight as practical and

Should be secured to the building

structure at least every 5 feet.

B. Any turns should have at least a 3 foot

radius in order to ease the inner wire

through the turn.

C. Limit cable length to no more than 50 feet.

For a longer reach use Young Regulator

Electronic Balancing Dampers.

2. Casing can be cut to length with a pair of wire

cutters.

3. Feed the inner wire through the casing. It

should slide easily.

4. Leave at least 3” of inner wire on each end.

Step 2 Assemble the 270 Controller

1. Rotate the control shaft counter-clockwise until

the rack is in the full-up position. Then return

clockwise two clicks.

2. Secure the outer casing in the casing clamp.

3. Install stainless inner-wire into the hole in the

wire stop. The washer must be between the

controller rack gear and the hole. (See Figure 3)

4. Tighten the screw until the wire starts to bend.

5. Install controller to termination using the

mounting bracket nut.

6. Install the mounting bracket with the

controller to a ceiling joist, plenum, diuser or

access panel.

Nomenclature Controller Damper

Damper Installation on Reverse

Damper Shell

Angle Bracket

Shaft

Hub

Casing Coupling

Bowden Casing

& Wire

Figure 2 5020CC Damper

Bowden Casing & Wire

Casing Clamp

Wire Stop

Rack Gear

Pinion Gear

Mounting Bracket Nut

Mounting Bracket

Control Shaft

Figure 1 270-275 Termination

Wire Stop

Inner Wire

Thumb Screw

Figure 3 Wire Stop Closeup

Wire Stop

Rack Gear Arm

Screw

Inner Wire

Washer

Step 3 Connect the Damper

1. Slide angle bracket over the shaft.

2. Align the angle bracket perpendicular to the damper shell and

fasten securely to the damper shell.

3. Slide the hub onto the shaft.

4. Rotate the shaft until the damper is fully closed.

5. Orient the hub so that it is 45

above the horizontal. (a little past

10:00 on a clock face) fasten the two set screws securely with a

1/8” allen wrench.

6. Install the casing coupling to the middle hole in the bottom of

the angle bracket. Secure with the keps nut.

7. Slide the inner wire through the casing coupling then through

the wire stop in the hub. Push the casing into the coupling until

it bottoms out (approx. 0.5”). Tighten the thumb screw securely.

8. Thread the inner wire through the wire stop attached to the

hub. (This is the same as on the controller without a washer.)

9. Conrm the Hub is positioned as shown in gure 4.

10. Tighten the wire stop on the hub.

11. Conrm proper operation of the damper by exercising the

control from full opn to full closed.

Installation Validation

1. Rotate the controller clockwise with the 030-12 wrench. It should move freely. If it is Hard to turn? - Check the

path of the casing. Ease any turns, ensure it is not moving as the inner wire tries to move up and down.

2. When the controller is rotated full clockwise the damper should be full open. If it is Not Fully Open? - Adjust

starting position of the hub. Release the inner wire and adjust the hub position on the shaft.

3. Cut o any excess inner wire.

Ceiling Terminations Description Application

270-275 Rack and Pinion Controller w/angle bracket Inside plenums, atop square diusers, behind

grille, above a drop ceiling or access panel

270-275 PH As above, adjusted with phillips head screwdriver Inside plenums or above drop ceilings

270-275ML Angle bracket with extended control shaft Inside plenums with Ice Tong style diusers

270-301 Ceiling cup and 3” cover Embedded in a Sheetrock ceiling

270-301BC As above, with bracket to fasten cup to stud Embedded in a Sheetrock ceiling

270-301EZ Angle bracket and 3” cover plate Above any ceiling

270-315 Cup and 2.25” threaded cap Higher security cover

270-315BC Cup, 2.25” threaded cap & 3” cover plate Embedded in a Sheetrock ceiling

270-896 “C” bracket, screw cap 1” head Embedded in a Sheetrock ceiling

4-Port Four Position Balancing Station Bring all of the cables for an area to one place

Ceiling Terminations Description Application

270-302 Cup and Cover plate - wall mount Embedded in a plastered wall

270-700 4x4 box with Stainless Cover and attractive adjustment knob Wall mount “Manual Thermostat”

270-896LO “C” bracket, screw cap 1” head - Wall mount Embedded in a plastered wall

B-Kits Shaft Size Application

270-XXXB 1/2” round or 3/8” square shafts Dampers by Others

270-XXXQ 5/16” round or 1/4” square shafts Dampers by Others

Steps 1 - 5 for B-Kits

Dampers by Others

Figure 4 - Damper Hardware

5020CC

Ceiling Terminations

Bowden Cable Controls

270-275 270-275PH 270-275ML 270-896

270-301 Cutaway 270-301EZ 270-315 Cutaway

4-Port Balancing Station

Wall Terminations

Bowden Cable Controls

270-700 “Manual Thermostat”

with 5020CC

270-302 Wall Cup and Cover 270-896LO Wall Controller

Damper

Family

Description Direction of

Operation

5020CC Round Exterior Bowden Push to Close

5020CC2 Round Interior Bowden Push to Open

820ACC OBD Bottom mount Bowden Push to Close

830ACC OBD Exterior Shaft Bowden Push to Close

Bowden Cable Controls

Functional Drawing

270-301 Concealed Cup

Room view w/o cover

Inset 270-301 Section View