1/8/US/4
Floor Diffusers
TROX USA, Inc.
4305 Settingdown Circle
Cumming, Georgia 30028
USA
Telephone770-569-1433
Facsimile770-569-1435
www.troxusa.com
e-mail: sales@troxusa.com
Contents • Description
Contents • Description
Product Features
Dimensional Information
Installation Procedure
2
3
4
6
Performance Data
Product Specification
Order Details
TROX type FB diffusers supply air from the floor in a swirling
fashion. The discharge air is mixed with the surrounding room air
quickly to dissipate any temperature differences and velocities.
This provides a comfortable environment for the occupants and
allows the diffusers to be placed within a few feet of a seated
occupant.
Special features
FB diffusers can be used in an open office space where one
diffuser can be placed in each cubical. This would allow each
occupant to have control over their own environment by twisting
the face of the diffuser allowing more or less conditioned air into
the space.
• All metal construction available
Large enclosed offices or conference rooms can utilize the VAV
feature of the diffusers allowing several diffusers to be tied into
one thermostat.
7
9
11
• Diffusers available in aluminum and plastic construction
• All plastic diffusers are NFPA 90A compliant
• Aluminum diffusers can support up to 5000 lbs
• Quick installation in any raised access floor using spring clips
• Standard dirt trap can hold up to 20oz of liquid
• VAV diffusers can be installed in the same location as other FB diffusers
Design changes reserved. All rights reserved © TROX USA (02/10/15)
2
Product Features
DESIGN
APPLICATION
Type FB floor diffusers with the occupant adjustable (OA) feature
incorporate a unique airflow control damper whose position can
be manually adjusted by rotating the face of the diffuser core
assembly, affording the occupants of the space individual airflow
control. The retention basin is designed to catch and retain up to
20 fluid ounces of debris or liquid that might fall through the face
of the diffuser. The diffuser core assembly is removable to allow
periodic removal and cleaning of the debris basin.
Type FB floor diffusers can be used anywhere air is required and
pressurized floor plenum is available.
Diffusers with the concealed (SM) airflow adjustment allow
the installer to set the airflow by adusting the height of the dirt
basket. This allows the designer to specify the correct airflow
required for the space.
Alternative to a manual airflow adjustment would be using a VAV
actuator. These units can be ordered with either a 3 wire (floating point) actuator or a proportional control. These actuators are
24V and have plug and play connections.
If the diffusers are to be installed in a concrete floor, the concealed airflow adjustment is available for a floor up to 8” thick.
Once the slab thickness exceeds that depth typically the diffuser is selected without the dirt basket. This is due to the overall
length of the diffuser being 3” longer than the slab thickness.
Commercial office spaces have many areas where floor diffusers can be applied. The occupant adjustable visions are ideal for
large open office spaces. The occupant adjustable version gives
the workers control over their own environment. By twisting the
face open or closed they are able to increase or decrease the
airflow to the space. Larger private offices or small conference
rooms can be best controlled by using the VAV version. A thermostat controls when the diffusers open or close.
Theaters or places of worship are good applications for the
concealed adjustment diffusers. The diffusers can be sized to
be very quiet and be placed under the seats of the occupants.
Typically you will see one diffuser placed under every other seat
in a large audiitorium area.
Metal floor diffusers in particular are a good solution for casinos
due to their sturdy construction. Additionally supplying cool air at
the floor will allow smoke and odors to rise out of the occupied
zone
3
Dimensional Information
FBK-VF-K-SM
FBK-VF-K-OA
Damper Position
Indicators
Overall = 9 ⅞″
Overall = 9 ⅞″
Hole Size = 8¾″
Hole Size = 8 ¾″
Carpet
Attachment Spring
6″
Damper
Attachment Spring
Carpet
6″
Dirt Basket
Dirt Basket
NOTE: Airflow Adjustment Requires Removal of the Diffuser Face
FBK-VF-K-SM (installed in slab)
FBK-VAV-VF-K
Overall = 9 ⅞”
Hole Size = 8 ¾”
Slab
Thickness
(x”)
Carpet
Spring Clips
Overall = 9 ⅞”
Hole Size = 8 ¾”
Carpet
Attachment
Spring
X + 3”
Dirt Basket
Actuator
RJ12 (Female) Connectors
NOTE: Overall depth MUST be specified (x+3″)
NOTE: Airflow adjustment requires removal of the diffuser face
4
Carpet
8 1/4”
Dimensional Information
FBK/FBA/FBM 200 with Carpet Flange
FBK/FBA/FBM 200 without Carpet Flange
¾″
9 93/4”
7 ⅞″
Mounting Hole
83∕4”
Upper
8″
Upperhole
hole diameter
diameter ==8″
Carpet
Carpet
6 6″
3/2”
Bore
hole
= =⅞″
Bore
hole
⅞″
Lower
hole
7⅝″
Lower
holediameter
diameter =
= 7⅝″
Mounting Hole Size
8 ¾″
8¼″
FBK-VAV/200
5
Installation Procedure
Installation with Carpet Flange
(in a raised floor tile or concrete slab)
Mounting Hole Size
8 ¾″
STEP 1: Locate and install the access floor panel and carpet
tiles. Assure that the opening in the floor tile is within the
dimensional tolerance shown above.
STEP 2: Align the springs such that the long ends (with
metal caps) are inserted within the hole in the raised floor
tile.
STEP 3: Push firmly (applying equal pressure to each side
of the carpet flange) until the carpet flange snaps in to the
floor tile. Install the core assembly (and VAV chassis, where
applicable) into the carpet flange making sure the damper
movement arms are placed into the notched openings of the
damper sleeve and the core rotation stop is within the milled
slot on the bottom of the core.
6
Performance Data
Horizontal Discharge
Vertical Discharge
Performance Data for VF Element (Fixed Vertical Discharge)
Airflow Rate
(CFM)
Pressure Loss
(in.w.g.)
Outlet NC*
T50
Local Temperature Differential (°F) at T50 and R50
R50
(in.)
(in.)
8
9
10
TROOM - TSUPPLY (°F)
11
12
13
14
20
0.003
<10
10
7
-1.77
-1.99
-2.21
-2.44
-2.66
-2.88
-3.10
30
0.007
<10
14
9
-1.18
-1.33
-1.48
-1.62
-1.77
-1.92
-2.07
40
0.013
<10
19
10
-0.89
-1.00
-1.11
-1.22
-1.33
-1.44
-1.55
50
0.020
<10
24
11
-0.71
-0.80
-0.89
-0.97
-1.06
-1.15
-1.24
60
0.029
<10
29
12
-0.59
-0.66
-0.74
-0.81
-0.89
-0.96
-1.03
70
0.040
<10
33
13
-0.51
-0.57
-0.63
-0.70
-0.76
-0.82
-0.89
80
0.052
12
38
14
-0.44
-0.50
-0.55
-0.61
-0.66
-0.72
-0.78
90
0.066
15
43
15
-0.39
-0.44
-0.49
-0.54
-0.59
-0.64
-0.69
100
0.082
18
48
16
-0.35
-0.40
-0.44
-0.49
-0.53
-0.58
-0.62
110
0.099
21
52
17
-0.32
-0.36
-0.40
-0.44
-0.48
-0.52
-0.56
120
0.118
24
55
19
-0.30
-0.33
-0.37
-0.41
-0.44
-0.48
-0.52
130
0.138
27
58
21
-0.27
-0.31
-0.34
-0.37
-0.41
-0.44
-0.48
140
0.160
30
60
23
-0.25
-0.28
-0.32
-0.35
-0.38
-0.41
-0.44
150
0.184
33
62
24
-0.24
-0.27
-0.30
-0.32
-0.35
-0.38
-0.41
PERFORMANCE NOTES:
1.Pressure loss and noise data is for basic assembly with carpet flange, dirt basket, and airflow control damper in wide open position.
2.NC levels shown assume 10 dB room absorption.
3.Local temperature differentials shown are those predicted at a height coincident with T50 and a horizontal distance R50 from the diffuser centerline
(see diagram above). For example, temperature differentials exceeding -0.66°F(shown above for an airflow rate of 80 CFM and Troom - Tsupply of
12°F) and velocities greater than 50 FPM should be confined to the area within 38 inches of the floor and 14 inches (measured horizontally) from
the centerline of the diffuser.
4.Value shown in shaded cells represent airflow rates which can generally be achieved only when the diffusers are ducted and/or directly connected
to fan powered terminal units and are not recommended for pressurized floor plenum applications.
7
Performance Data
Adjustable EU Element
Performance Data for EURO (EU) Element, Set for Vertical Discharge Position
Airflow Rate
Pressure Loss
20
0.004
30
40
(CFM)
(in.w.g.)
Outlet NC*
T50
Local Temperature Differential (°F) at T50 and R50
R50
TROOM - TSUPPLY (°F)
(in.)
(in.)
8
9
10
11
12
13
14
<10
11
8
-1.77
-1.99
-2.21
-2.44
-2.66
-2.88
-3.10
0.008
<10
16
10
-1.18
-1.33
-1.48
-1.62
-1.77
-1.92
-2.07
0.014
<10
21
11
-0.89
-1.00
-1.11
-1.22
-1.33
-1.44
-1.55
50
0.022
<10
26
12
-0.71
-0.80
-0.89
-0.97
-1.06
-1.15
-1.24
60
0.032
<10
32
14
-0.59
-0.66
-0.74
-0.81
-0.89
-0.96
-1.03
70
0.044
<10
37
15
-0.51
-0.57
-0.63
-0.70
-0.76
-0.82
-0.89
80
0.057
<10
42
16
-0.44
-0.50
-0.55
-0.61
-0.66
-0.72
-0.78
90
0.072
<10
47
17
-0.39
-0.44
-0.49
-0.54
-0.59
-0.64
-0.69
100
0.089
<10
53
18
-0.35
-0.40
-0.44
-0.49
-0.53
-0.58
-0.62
110
0.108
<10
58
19
-0.32
-0.36
-0.40
-0.44
-0.48
-0.52
-0.56
120
0.128
10
63
20
-0.30
-0.33
-0.37
-0.41
-0.44
-0.48
-0.52
130
0.151
12
66
21
-0.27
-0.31
-0.34
-0.37
-0.41
-0.44
-0.48
140
0.175
14
69
22
-0.25
-0.28
-0.32
-0.35
-0.38
-0.41
-0.44
150
0.200
16
72
23
-0.24
-0.27
-0.30
-0.32
-0.35
-0.38
-0.41
PERFORMANCE NOTES:
1.Pressure loss and noise data is for basic assembly with carpet flange, dirt basket, and airflow control damper in wide open position.
2.NC levels shown assume 10 dB room absorption.
3.Local temperature differentials shown are those predicted at a height coincident with T50 and a horizontal distance R50 from the diffuser centerline
(see diagram on page 7). For example, temperature differentials exceeding -0.89°F(shown above for an airflow rate of 60 CFM and Troom - Tsupply of 12°F) and velocities greater than 50 FPM should be confined to the area within 32 inches from the floor and 14 inches (measured horizontally)
from the centerline of the diffuser.
4.Value shown in shaded cells represent airflow rates which can generally be achieved only when the diffusers are ducted and/or
directly connected to fan powered terminal units and are not recommended for pressurized floor plenum applications.
Performance Data for EURO (EU) Element, Set in Horizontal Discharge Position
Airflow Rate
(CFM)
Pressure Loss
(in.w.g.)
Outlet NC*
Local Temperature Differential (°F) at R50 (4” above floor)
R50
(in.)
9
10
TROOM - TSUPPLY (°F)
11
12
13
14
20
0.011
<10
<12
N/A
N/A
N/A
N/A
N/A
N/A
N/A
30
0.025
<10
<12
N/A
N/A
N/A
N/A
N/A
N/A
N/A
40
0.044
<10
<12
N/A
N/A
N/A
N/A
N/A
N/A
N/A
50
0.069
<10
14
-2.66
-2.99
-2.99
-2.99
-2.99
-2.99
-2.99
60
0.100
17
20
-2.22
-2.49
-2.49
-2.49
-2.49
-2.49
-2.49
70
0.136
22
27
-1.90
-2.14
-2.14
-2.14
-2.14
-2.14
-2.14
80
0.177
28
35
-1.66
-1.87
-1.87
-1.87
-1.87
-1.87
-1.87
90
0.224
33
44
-1.48
-1.66
-1.66
-1.66
-1.66
-1.66
-1.66
PERFORMANCE NOTES:
8
1.Pressure loss and noise data is for basic assembly with carpet flange, dirt basket, and airflow control damper in wide open position.
2.NC levels shown assume 10 dB room absorption.
3.Local temperature differentials shown are those predicted at a height coincident with 4” and a horizontal distance R50 from the diffuser centerline
(see diagram on page 7). For example, temperature differentials exceeding -2.49°F (shown above for an airflow rate of 60 CFM and Troom - Tsupply
of 12°F) and velocities greater than 50 FPM should be confined to the area within 20 inches (measured horizontally) from the centerline of the
diffuser.
4.Value shown in shaded cells represent airflow rates which can generally be achieved only when the diffusers are ducted and/or directly connected
to fan powered terminal units and are not recommended for pressurized floor plenum applications.
8
Product Specification
PART 1 – GENERAL
1.1
RELATED DOCUMENTS
Drawings and general provision of the Contract, including
General and Supplementary Conditions and other
Division 1 Specification Sections, apply to this Section.
PART 2 – PRODUCTS
2.1.
UNDERFLOOR AIR DISTRIBUTION DIFFUSERS
A. Acceptable Manufacturers:
1. TROX Floor Diffuser Series FB (Basis of Design)
2. Approved Equal
B. Furnish and install TROX Series FB floor diffusers
of capacities indicated on plans. Diffusers shall
incorporate a removable (single piece) core section which
consists of a series of visible concentric rings supported
by radially aligned air deflection vanes which distribute
the supplied air in a 360 degree cyclonic “swirl” discharge
pattern.
C. Materials:
Type FBA:
Diffuser Core and Trim Ring: Aluminum. Dirt
Basket/ Damper Assembly: Plastic (NFPA90A
Compliant)
Type FBK:
Diffuser Core and Trim Ring: Plastic (NFPA90A
Compliant)
Dirt Basket/ Damper Assebmly: Plastic
(NFPA90A Compliant)
Type FBM:
Diffuser Core and Trim Ring: Aluminum
Dirt Basket/ Damper Assembly: Steel
D. Finish:
Type FBA diffusers core and trim ring surfaces shall be
brushed aluminum. All other visible internal parts shall be
flat black.
Type FBK diffusers core and trim ring surfaces shall be
(grey or black). All other visible internal parts shall be flat
black.
Type FBM diffusers core and trim ringsurfaces shall be
brushed aluminum. All other visible internal parts shall be
flat black.
E. Diffuser Features and Performance:
1. Occupant Airflow Adjustment:
The assembly shall provide for occupant adjustment
of the outlet airflow without necessitating removal of the diffuser face or other components. Adjustment of the outlet airflow shall be accomplished by rotation of the diffuser core.Full adjustment shall require no less than a 30 degree rotation of the core. This rotation
must be accomplished by hand and not require the
use of tools or any other devices. An indicator scale shall be inscribed on the outlet face and provide visual evidence of the damper at all times.
2.
Balancing Provisions:
The outlet shall incorporate provision for the field
adjustment of a maximum airflow setting. Adjustment
of this setting shall not affect the individual occupant’s
ability to adjust the outlet airflow, except to limit the
maximum airflow available to that occupant.
3.
Liquid and Solid Retention Capacity:
A dirt and liquid catch basin shall be furnished to
facilitate removal of any dust, spills, or other objects that may have penetrated the outlet face. This basin must be capable of capturing and retaining at least 20 fluid ounces of liquid spillage through the diffuser face.
4. Air Diffuser Performance:
Outlet airflow rates shall be limited to that which results in a terminal velocity no greater than 50 fpm at any point four (4) feet above the diffuser face. This is based on a temperature differential of 12˚F between room and supply air. Maximum airflow rate so determined shall be clearly identified and substantiated by manufacturer’s data upon submission. Airflow rates resulting in terminal velocities exceeding that specifically stated herein shall not be allowed.
9
Product Specification
PART 3 – EXECUTION
3.1
INSTALLATION:
Installation requires that a mounting hole (8.75 inches
diameter) in the access floor panel be provided by the
raised floor contractor. A separate trim ring shall be
supplied to support the diffuser core while preventing
fraying of the carpet edges along the hole in which the
diffuser is installed. This trim ring shall allow a minimum of
½” overlap of the carpet surface when installed in the
recommended size floor opening. Floor diffuser carpet
flange shall be rigidly mounted to the access flooring
system by snap fastening clips that contact the lower
surface of the access floor tile at a minimum of four points.
Diffusers mounting shall be performed after completion
of the installation of the raised floor platform and shall not
necessitate the removal of any carpet or floor tiles.
3.2
STRUCTURAL CAPACITY:
The diffusers shall be capable of supporting a load of
1,350 pounds (FBK) or 5,000 pounds (FBA or FBM)
applied evenly across a minimum 1 inch diameter area
located at the center of the diffuser face.
3.3
COMPLIANCE WITH SPECIFICATION
The diffuser specifications and requirements contained
herein supercede and transcend any other mention or
description of floor supply diffusers offered in other
sections of the building plans and/or specification.
10
Order details
Order code
FBA
-
4
-
VF
-
K
/
200
-
SM
/
8
/ 0
Type
FBA =Core and trim ring: aluminum;
Damper: plastic
FBK =Core and trim ring: plastic;
Damper: plastic
FBM =Core and trim ring: aluminum; Damper: steel
Finish
1
2
3
4
=
=
=
=
Gray (FBK)
Black (FBK)
Black with brushed aluminum rings (FBA/FBM)
Brushed aluminum (FBA/FBM)
Overall Height of Diffuser (Type SM only)
Enter the overall height of diffuser when
installed in slab greater than 3″ thick
(slab thickness + 3″). See page 4.
Operator
OA
SM
VAV-PC
VAV-FP
0
=
=
=
=
=
Occupant adjustable
Concealed adjustment
Proportional control actuator
3 wire, floating point actuator
No dirt basket
Element
VF
EU
= Vertical (Fixed)
= Adjustable (Horizontal/Vertical)
Trim ring
K
O
= With carpet flange
= No carpet flange (stepped bore)
Order example
FBA-4-VF-K/200-SM/8/0
11