CaptiveAire CD36 User Manual

3900 Dr. Greaves Rd. • Kansas City, MO 64030 • (816) 761-7476 • FAX (816) 765-8955

CD36 LOW LEAKAGE CONTROL DAMPER

GALVANIZED STEEL

FEATURES

The CD36 offers sturdy, steel construction with interlocking frame design. Damper locks together without bolts, screws, or rivets that could shake loose. Frame corners are internally braced to reduce racking.

Axles positively lock to blades without screws or welds. Non-stick, noncorrosive bearings assure long life and ease of operation. Axles and bearings combine with a shake proof linkage for low maintenance operation.

When tested in accordance with AMCA Standard 500, the reasonably priced CD36 also exhibits low leakage rates that meet the frequently specified, 10 cfm/sq. ft. at 4" w.g. level.

VARIATIONS

Variations to the CD36 basic design are available at additional cost. They include:

• Enamel and epoxy finishes.

• Factory-installed, pneumatic and electric actuators (specific information required with order).

• Ruskin frame-mounted universal actuator bracket to simplify field installation of most actuators (specify actuator and action, i.e., N.O. or N.C., with order).

• SP100 Switch Package to remotely indicate damper blade position.

• Heavier frame construction with U-channel frame.

• Front, rear or double flange frame with or without bolt holes.

• 304 stainless steel construc

tion.

ALL STATED SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE OR OBLIGATION.

Spec CD36-399/Replaces CD36-197 ©Ruskin Manufacturing 1999

OPENING DIM. BLADE ACTION FRAME STYLE

QTY.

A* B* PB OB STD.

Front

Flange

Rear

Flange

Double Flange

VARIATIONS

JOB LOCATION CONTRACTOR

31/2"

(89)

(25)

OPPOSED BLADE

Low profile frame

illustrated is typical for

units under 13" (330) high.

Outboard Support

Bearing

Control

Shaft

Sleeve or Duct

Heavy Construction/

Special Materials

U-channel Frame Option

STANDARD CONSTRUCTION

FRAME

5" x 1" x 16 gage (1 27 x 25 x 1.6) galvanized steel hat channel reinforced with corner braces for structural strength equal to 13 gage (2.28) channel frames. Low profile 31/2" x 3/8"

x 16 gage (89 x 10 x

1.5) galvanized steel channel top and bottom frame on dampers under 13" (330) high.

BLADES

6" (152) wide, 16 (1.6) gage galvanized steel blades approximately 6" (152) on center. Parallel or opposed action.

SEALS

Blade edge is PVC coated polyester fabric mechanically locked into blade edge. Jamb is flexible metal, compression type.

BEARINGS

Synthetic.

LINKAGE

Concealed in frame. Exposed linkage optional.

AXLES

" (13) plated steel hex.

CONTROL SHAFT

6" (152) x 1/2

" (13) diameter. Outboard support bearing supplied with all single section dampers for field mounted actuators. Factory-installed jackshaft supplied with all multiple section dampers.

FINISH

Mill.

MAXIMUM SIZE

Single section – 48"w x 72"h (1219 x 1829). Multiple section assembly – Unlimited size.

MINIMUM SIZE

Single blade – 5"w x 5"h (127 x 127).

Two blades, parallel or opposed action, exposed

linkage – 8"w x 95/8

"h (203 x 245). (Standard)

Two blades, parallel or opposed action, concealed

linkage – 5"w x 8"h (127 x 203). (Optional)

TEMPERATURE LIMITS

-25°F (-32°C) minimum and +180°F (+83°C) maximum.

Maximum section width varies with static pressure. Consult Ruskin if application involves pressures in excess of 2.5 inches w.g. or air velocities in excess of 2000 fpm.

NOTE: Dimensions shown in parenthesis ( ) indicate millimeters.

*Units furnished approximately 1/4

" (6) smaller than

given opening dimensions.

†Jackshaft used only on multiple

section dampers.

PARALLEL

BLADE DEPICTED

Optional Exposed Linkage.

Damper

Frame

/4"†

(171)

CD36 SUGGESTED SPECIFICATION

CD36 PERFORMANCE DATA

3900 Dr. Greaves Rd. Kansas City, MO 64030 (816) 761-7476

FAX (816) 765-8955

Furnish and install, at locations shown on plans, or in accordance with schedules, control dampers that meet the following minimum construction standards. Frame shall be 16 gage (1.6) galvanized steel structural hat channel with tabbed corners for reinforcement. The blades shall be single skin, 16 gage (1.6) galvanized steel with three logitudinal grooves for reinforcement. Blade edge seals shall be PVC coated polyester fabric suitable for -25°F to +180°F mechanically locked into the blade edge. Adhesive or clip-on type seals are unacceptable. Jamb seals shall be flexible metal, compression type to prevent leakage between blade end and damper frame. Blade end overlapping frame is unacceptable. Bearings shall be corrosion resistant, molded synthetic sleeve type turning in an extruded hole in the damper frame. Axles shall be hexagonal positively locked into the damper blade. Linkage shall be concealed

out of airstream, within the damper frame to reduce pressure drop and noise. Submittal must include leakage, pressure drop, maximum velocity and maximum pressure data based on AMCA Publication 500. Dampers shall be in all respects equivalent to Ruskin Model CD36.

Specifier Select Option

Dampers shall be equipped with factory installed damper position indication switch package. The switch package shall include two position indication switches linked directly to the damper blade to provide full open and full closed damper blade position. The switch package shall provide the capability to interface with the HVAC control system and provide remote damper blade position status. Switch packages shall be in all respects equivalent to Ruskin Model SP-100.

*Leakage information based on pressure differential of 1" w.g. tested per AMCA Publication 500.

Damper

Width

Maximum

System

Velocity

Maximum

System

Pressure

Leakage*

% of

max. flow

CFM/

sq. ft.

48" 36" 24" 12"

2.5" w.g.

3.0" w.g.

4.0" w.g.

5.0" w.g.

1500 fpm 1500 fpm 1500 fpm 1500 fpm

0.36

0.39

0.47

3.7

4.8

7.0

The CD36 is structurally designed for velocities to 2000 fpm and above. Turbulence may produce objectionable noise in some conditions with velocities above 1500 fpm.

Dampers may tolerate higher pressures and velocities than those listed here. Conservative ratings are presented intentionally in an effort to avoid misapplication. Consult Ruskin or your Ruskin representative when a damper is to be applied in conditions exceeding recommended maximums.

INSTALLATION

CD36 IS NOT RECOMMENDED FOR INSTALLATION WITH BLADES RUNNING VERTICALLY. For proper installation, damper must be installed square and free from racking. Actuator must be installed on linkage side. Opposed blade dampers must be operated from a power blade or shaft. See "Induct Mount Control Dampers Installation Instructions" for details.

BRACING OF MULTIPLE SECTION DAMPER ASSEMBLIES

The CD36 is intended to be self supporting only in its largest single section size. Multiple section damper assemblies may require bracing to support the weight of the assembly and to hold against system pressure. Ruskin recommends appropriate bracing to support the damper horizontally at least once for every 8' of damper width. Vertical assemblies and higher system pressures may require more bracing.