DCG-ACTIF

PART 1 – GENERAL

1.1 SUMMARY

A. Adjustable round supply diffuser(s) with autonomous thermal adjustment of discharge mode (horizontal/vertical) in response to supply air temperature, without controls and without electricity.

B. Intended for tall spaces and applications where supply air temperature varies between heating and cooling modes.

C. Construction: aluminum; duct mounted or drywall mounted, as scheduled.

D. Optional plenums and dampers: provide PLRR/PLXP plenums, EQ equalizing grid, and damper types (R3G/OBD/RSBD) only where scheduled.

E. Thermodynamic actuator system: Actuator and thermodynamic mechanism shall be fully concealed within the product and not visible from the occupied space.

F. Autonomous operation: System shall be fully autonomous and shall require no controls, no electricity, and no wiring of any kind.

G. Factory configuration: System shall be factory pre-configured and shipped ready to install; no field adjustment, calibration, or configuration shall be required.

1.2 SUBMITTALS

A. Product Data: Manufacturer’s data for scheduled neck sizes and configurations, including:

1. Free area; recommended minimum and maximum airflow.
2. Pressure loss and diffuser-generated NC.
3. Throw data (as published) for horizontal and vertical discharge conditions where applicable.
4. Temperature differential correction factors (where published).
5. Description of thermodynamic mechanism (autonomous switching behavior).
6. Mounting method and accessories.
7. Optional plenum and damper selections (if scheduled).

B. Shop Drawings: Show model designation, neck size, mounting type (duct mounted or drywall mounted), finish/color, and optional plenum selection (PLRR or PLXP) including EQ option, where scheduled. Indicate any scheduled damper type (R3G / OBD / RSBD).

C. Airflow Prediction Report (Required – SelectiV): Provide a manufacturer-generated SelectiV airflow prediction report for each diffuser type and each distinct room condition. Report shall be based on manufacturer performance data and include recognized airflow physics corrections (ΔT correction factors, Coanda effects, buoyancy effects, jet interaction, and wall/floor/ceiling collision effects). Report shall include:

1. 3D room model with diffuser locations.
2. Predicted airflow visualizations: plan (top), section (side), elevation (front).
3. Throws for terminal velocities of 150, 100, 60, 50, 40, 30, and 20 fpm.
4. Pressure loss at scheduled airflow.
5. Diffuser-generated NC at scheduled airflow.
6. Perceived NC at room center (5 ft height) from all sources combined across 63–8000 Hz octave bands; include key assumptions used.

D. Verified CFD Validation (When Indicated): Provide EffectiV Verified CFD validation and summary report for spaces indicated and/or when operation is outside published selection limits (airflow, ΔT, mounting height, geometry).

1.3 SUBSTITUTIONS

A. Substitutions per Division 01.

B. Proposed equals shall provide a line-by-line compliance matrix including all Part 1 deliverables, including the SelectiV Airflow Prediction Report deliverables and confirmation of autonomous thermal adjustment without controls/electricity.

PART 2 – PRODUCTS

2.1 BASIS OF DESIGN

A. EffectiV DCG-ACTIF adjustable aluminum round diffuser with autonomous thermodynamic adjustment.

2.2 SIZES AND AIRFLOW (AS SCHEDULED)

A. Provide scheduled neck diameter(s) and airflow within published ranges for DCG-ACTIF sizes only:

1. 6 in (160 mm): 125–240 cfm
2. 8 in (200 mm): 200–390 cfm
3. 10 in (250 mm): 310–470 cfm
4. 12 in (315 mm): 490–950 cfm

B. Sizes 14 in, 16 in, 18 in, and 20 in are not available for DCG-ACTIF.

2.3 MATERIALS AND CONSTRUCTION

A. Diffuser: aluminum construction.

B. Autonomous adjustment: thermodynamic mechanism changes the central assembly position in response to supply air temperature to shift discharge mode between horizontal and vertical.

C. Mounting: duct mounted or drywall mounted, as scheduled.

D. Actuator life expectancy: Thermodynamic actuator/service life shall be equal or superior to 25 years under normal HVAC operating conditions.

2.4 FINISH

A. Factory powder coat, TGIC-free, white M9016 unless otherwise scheduled.

2.5 OPTIONAL PLENUMS AND OPTIONS (AS SCHEDULED)

A. PLRR plenum: optional plenum used to equalize air (including EQ option), to use an oversized face with a given duct diameter, and/or to add a special damper. Plenum shall include anti- seismic tabs.

B. PLXP plenum: optional side-connection plenum used where ceiling space is limited, where acoustical performance is important, and/or to add a special damper.

C. EQ option: air equalizing grid (perforated plate) where scheduled.

2.6 DAMPERS (AS SCHEDULED)

A. Provide damper type as scheduled:

1. R3G integrated butterfly volume damper
2. OBD opposed blade damper
3. RSBD radial sliding blade damper

PART 3 – EXECUTION

3.1 INSTALLATION

A. Install per manufacturer instructions; coordinate duct-mounted versus drywall-mounted installation.

B. Where optional plenum is scheduled, install plenum square/true and attach diffuser per manufacturer method; coordinate anti-seismic tab attachment where applicable.

3.2 ADJUSTING

A. Balance to scheduled airflow. No external controls or electrical connections are required for adjustment.