Page 1
Non Fan Powered Units
ACCESSORIES - Discharge Sound Attenuator | Model AXA
www.carnes.com B-79
Design
Model Numbering Series Size OPTION
12 345 67
A X A B 0 2
A - Air
Terminal
X - Shipped
Separately
SIZE
01
02
04
06
07
08
09
10
H - Hanger Brackets
A - Attenuator
FEATURES
•
Sturdy 24 gauge galvanized steel
construction.
•
Convenient Slip and Drive connection on
the inlet and outlet.
•
Insulation is 1” thick, 1.5 lb./cu. ft.dual
density fiberglass material (others available).
•
Optional hanger brackets.
AIR
FLOW
B
A
C
S & Drive Connections
Optional
Hanger Brackets
DIMENSIONS (Listed in Inches)
DISCHARGE SOUND ATTENUATOR
UNIT SIZE
SIZE AV AD AB A B C
01 05/06 --- --- 12 (305) 8 (203) 34-1/2 (876)
02 07/08 0505/0606/0707/0808 06/07/08 12 (305) 10 (254) 34-1/2 (876)
04 10 1010 10 14 (356) 12-1/2 (318) 34-1/2 (876)
06 12 1212 12 16 (405) 15 (381) 34-1/2 (876)
07 14 1414 14 20 (508) 17-1/2 (445) 22-1/2 (571)
08 --- 1616 16 24 (610) 17-1/2 (445) 22-1/2 (571)
09 18/24 --- 18/24 32 (813) 17-1/2 (445) 22-1/2 (571)
10 16 --- --- 24 (610) 18 (457) 22-1/2 (571)
Metal Brackets
MODEL NUMBERING SYSTEM - Model AXA
Page 2
CARNES CLEAN AIR SILENCER | Model AXPA
Non Fan Powered Units
B-80 www.carnes.com
The Carnes Model AXPA Clean Air Silencer has
been designed and engineered to reduce discharge
sound levels of Clean Air Terminal Units. The Model
AXPA is a “reactive type” silencer which attenuates
discharge noise levels from air terminals and other
devices without the use of sound absorptive
materials such as fiberglass, mineral wool, etc. This
eliminates indoor air quality concerns when using the
Model AXPA Silencer.
Most other manufactured sound attenuators require
a considerable amount of straight duct upstream to
achieve any reduction in sound levels. The straight
duct is necessary to allow the air flow to become
uniform after being discharged from a VAV terminal
unit. Most HVAC systems today have limited space
available and additional upstream duct is not permitted or cost effective. The Model AXPA Silencer does
not require additional straight duct upstream
because it is designed and tuned specifically to
straighten the air pattern and attenuate sound
directly after the VAV damper.
The Model AXPA Silencer has an integral air flow
straightening section upstream of the sound
attenuating section. The air flow straightening
section consists of a short piece of straight duct
upstream of a long radius elliptical flow nozzle to
minimize turbulence (self noise) and to reduce
pressure drop of the silencer. This unique feature
allows for direct coupling of the Model AXPA Silencer
to the Clean Air Terminal Unit without the use of any
transitions or flow straightening ducts.
Through extensive acoustic tuning and laboratory
testing conducted in accordance with ARI Standard
880, the Model AXPA Silencer has proven to
effectively reduce discharge sound levels of air
terminals. The testing and rating (per ARI 880) was
conducted with the Model AXPA Silencer connected
directly to the Clean Air Terminal Unit. This unique
testing configuration provides the designer with real
world test results, eliminating questions regarding
the VAV damper effect on the silencer performance.
All Model AXPA Silencers include a removable
access door. This access door allows for periodic
cleaning of the sound attenuating cavity. Model
AXPA Clean Air Silencers combined with the Clean
Air Terminals are an excellent choice for hospital,
clean room and laboratory applications.
• No insulation or sound absorptive material in
the airstream makes this unit an excellent
choice for clean-room, hospital and laboratory
applications.
• Low pressure drop design.
• Convenient slip and drive connection on inlet
and outlet. Sized to match Clean Air Terminal
Units.
• Sturdy 22 gauge galvanized steel construction.
• Gasketed access panel to allow for cleaning.
• Tuned for direct connection to air terminals. No
need for additional air straightening duct
upstream.
• Air flow capacities to 4200 CFM.
• Optional hanger brackets (Unattached).
• Optional 1” external thermally insulated casings
must meet UL Test 181 for erosion resistance
and NFPA 90A requirements for 250°F
continuous temperature.
• Shipped separately (consult factory for shipping
attached).
Features Include:
t Model AXPA
[Patent 5,663,535]
Page 3
Non Fan Powered Units
www.carnes.com B-81
APPLICATION/PERFORMANCE DATA | Model AXPA
Models AVC, AVW and AVE with and without AXPA Clean Air Silencer
Sound Data (Discharge Noise Criteria)
Discharge Sound Power
NOTES: 1.ΔPsstatic pressure difference from inlet to discharge.
2.
Δ
P
s is the minimum pressure required to deliver CFM shown with the primary damper in wide open position.
3.
Dash (--) indicates NC level less than 10.
NC levels are derived from tests conducted in accordance with ARI Standard 880-2008 and are calculated in accordance with ARI Standard 885-2008 as
application data. NC is not part of the ARI certification program.
Discharge NC levels are based on —
a) 5 foot rectangular duct.
b) 5 foot lined flex duct (8” diameter).
c) Space effect factor (2400 ft
3
) at 5 feet from outlet.
d) End reflection.
e) Environmental adjustment factor.
Inlet
Size
(In.) CFM
Minimum ΔΔP
s
(Damper Full Open)
AVC
AVE
w/AXPA
AVW
1-Row
w/AXPA
AVW
2-Row
w/AXPA
5
75 .01 .02 .02
100 .02 .04 .04
200 .08 .14 .16
300 .20 .33 .36
350 .29 .45 .49
6
110 .01 .02 .04
200 .03 .07 .10
300 .07 .15 .18
400 .15 .27 .31
500 .25 .42 .46
7
140 .00 .01 .01
200 .01 .02 .04
400 .05 .11 .14
600 .13 .25 .35
700 .19 .35 .48
8
185 .01 .03 .05
400 .04 .14 .20
600 .10 .29 .41
800 .20 .50 .68
1000 .33 .75 1.01
10
300 .00 .02 .05
500 .00 .05 .10
800 .00 .11 .22
1200 .00 .22 .42
1500 .00 .33 .60
12
430 .01 .03 .05
800 .02 .09 .13
1200 .05 .20 .29
1800 .13 .41 .61
2300 .22 .65 .94
14
600 .00 .01 .03
1000 .01 .04 .11
1600 .01 .12 .21
2400 .03 .29 .41
3100 .06 .51 .63
16
780 .01 .03 .06
1600 .04 .12 .18
2400 .09 .26 .38
3600 .21 .56 .77
4200 .29 .74 1.01
Min. ΔΔPs 1.0” ΔΔPs 1.5” ΔΔPs 3.0” ΔΔPs
AVC
AVE
w/
AXPA
AVW
w/
AXPA
AVC
AVE
w/
AXPA
AVW
w/
AXPA
AVC
AVE
w/
AXPA
AVW
w/
AXPA
AVC
AVE
w/
AXPA
AVW
w/
AXPA
-- -- 10 11 10 12 11 14
-- -- 11 13 12 13 13 15
-- 10 15 16 16 18 18 22
11 12 19 20 21 22 23 27
11 13 19 20 21 22 23 27
-- -- 11 12 12 13 14 16
-- -- 13 14 14 15 17 22
10 11 16 16 18 19 21 27
10 12 16 16 18 20 21 27
11 13 18 19 20 21 25 28
-- -- 13 13 13 15 15 22
-- -- 14 14 14 16 18 23
-- -- 15 16 16 16 19 24
10 11 18 19 19 20 21 27
10 11 18 19 19 21 21 27
-- -- 13 14 14 15 20 20
-- -- 14 15 15 16 21 21
10 10 16 16 18 19 23 23
10 11 16 16 18 19 23 23
11 12 16 16 18 19 23 24
-- -- 14 14 15 18 22 25
-- -- 14 14 15 18 22 25
-- -- 15 15 16 18 22 25
-- 10 17 17 19 19 23 26
-- 10 17 18 19 19 23 26
-- -- 13 17 14 19 18 23
-- -- 13 17 15 19 19 24
-- 10 14 17 17 20 22 27
-- 11 15 18 17 20 23 27
10 13 15 18 19 20 25 28
-- -- 14 15 15 18 22 24
-- -- 14 15 15 18 22 24
-- -- 14 16 16 19 22 25
10 12 15 16 19 20 27 27
10 13 15 16 19 20 27 27
-- -- 13 13 14 14 19 20
-- -- 14 13 15 15 20 22
10 11 15 15 18 18 23 25
12 13 15 15 18 18 23 25
13 16 15 16 18 19 25 26
Page 4
APPLICATION/PERFORMANCE DATA | Model AXPA
Non Fan Powered Units
B-82 www.carnes.com
Models AVC, AVE with AXPA Clean Air Silencer
Sound Data (Sound Power by Octave Band)
Discharge Sound Power
Inlet
Minimum ΔΔP
s
1.0” ΔΔP
s
1.5” ΔΔP
s
3.0” ΔΔP
s
Unit
Sound Power (db) by Octave Band Sound Power (db) by Octave Band Sound Power (db) by Octave Band Sound Power (db) by Octave Band
Size
ΔΔ
(2) (3) (4) (5) (6) (7) (2) (3) (4) (5) (6) (7) (2) (3) (4) (5) (6) (7) (2) (3) (4) (5) (6) (7)
(In.) CFM
Ps
125 250 500 1000 2000 4000 125 250 500 1000 2000 4000 125 250 500 1000 2000 4000 125 250 500 1000 2000 4000
75 .01 33 24 18 18 16 19 45 34 30 34 38 37 46 36 33 38 42 41 48 40 38 43 48 47
100 .02 36 27 22 22 20 22 49 37 33 36 39 37 50 40 35 39 43 41 52 44 40 45 49 48
5 200 .08 44 34 30 32 32 29 57 46 39 40 42 39 59 48 42 43 46 43 61 52 46 48 52 49
300 .20 48 38 36 37 38 33 62 51 43 42 43 40 64 53 45 45 47 44 66 57 50 51 53 50
350 .29 50 40 38 39 41 34 64 52 44 42 44 40 66 55 47 46 48 44 68 58 51 51 54 51
110 .01 32 21 18 17 15 18 48 37 31 35 36 33 50 41 35 39 40 37 53 47 41 45 47 43
200 .03 40 30 26 25 25 24 54 42 36 39 40 37 56 46 40 42 43 41 60 52 46 48 50 47
6 300 .07 45 35 31 31 32 28 59 46 40 41 42 39 61 49 43 45 46 43 64 55 50 51 52 49
400 .15 49 40 34 35 37 31 62 48 42 43 43 41 64 52 46 46 47 44 67 58 52 52 54 51
500 .25 51 43 37 38 41 33 64 50 44 44 45 42 66 54 48 48 48 46 70 60 54 54 55 52
140 .00 33 21 18 17 16 20 52 42 38 38 38 37 53 45 43 41 42 41 55 51 50 48 48 47
200 .01 37 26 22 23 22 24 55 44 39 39 40 38 56 47 44 42 44 42 58 53 52 49 50 48
7 400 .05 44 34 32 33 33 31 61 48 42 40 43 41 62 51 46 44 47 45 64 57 54 51 53 51
600 .13 49 38 37 39 40 35 64 50 43 42 45 43 65 53 48 45 49 47 67 59 55 52 55 53
700 .19 51 40 39 41 42 37 65 51 44 42 46 44 66 54 48 46 50 47 68 60 56 52 56 54
185 .01 35 22 18 17 15 17 53 46 40 41 41 40 55 49 45 45 44 43 59 55 53 51 50 49
400 .04 43 32 30 29 30 29 59 49 42 42 45 44 61 53 47 46 48 47 64 59 55 52 54 53
8 600 .10 47 38 37 36 38 35 62 51 43 42 47 46 64 55 48 46 50 49 67 61 55 53 56 55
800 .20 49 41 42 40 43 39 64 52 44 43 48 47 66 56 48 46 51 51 69 62 56 53 57 56
1000 .33 52 44 45 44 48 42 65 53 44 43 49 48 67 57 49 47 52 52 70 63 57 53 58 58
300 -.00 33 19 16 15 15 17 55 46 45 53 48 45 57 50 49 57 52 49 60 57 57 65 59 56
500 -.00 37 26 24 24 23 23 59 49 46 53 50 48 61 53 50 57 54 52 64 60 58 65 61 58
10 800 -.00 41 31 31 32 31 27 63 51 46 53 51 50 65 55 51 57 55 54 68 62 59 64 62 61
1200 -.00 45 37 37 39 38 32 66 53 47 53 52 52 68 57 52 57 56 56 71 64 60 64 63 63
1500 -.00 46 39 41 43 42 34 68 54 48 53 53 53 70 58 52 57 57 57 73 65 60 64 64 64
430 .01 35 20 16 17 13 14 55 45 42 51 46 43 58 49 46 55 50 46 64 56 53 62 56 52
800 .02 41 29 28 29 27 26 59 49 44 51 50 47 63 53 48 55 53 51 68 60 55 62 59 57
12 1200 .05 46 35 36 36 36 34 62 51 46 51 52 51 66 55 50 55 55 54 71 62 57 62 61 60
1800 .13 50 42 44 44 46 41 66 54 48 51 54 54 69 58 52 55 58 57 75 65 59 62 63 63
2300 .22 53 45 49 48 52 46 67 55 49 51 56 56 71 59 53 55 59 59 76 66 60 62 65 65
600 .00 33 20 15 16 13 15 57 50 47 53 49 47 61 54 52 57 52 50 67 60 59 64 58 56
1000 .01 41 29 26 26 24 24 61 52 48 53 51 51 64 56 53 57 55 54 70 62 60 64 61 60
14 1600 .01 47 37 35 36 35 32 64 54 49 53 54 54 68 58 53 58 57 58 74 64 61 65 63 63
2400 .03 53 44 44 44 44 39 67 55 50 54 56 57 71 59 54 58 59 61 77 66 62 65 65 66
3100 .06 57 48 49 49 49 44 69 56 50 54 57 59 73 60 55 58 61 63 79 67 62 65 67 68
780 .01 38 23 14 17 12 14 59 49 44 52 50 49 62 53 47 56 53 52 68 59 53 63 58 57
1600 .04 49 36 31 32 31 31 64 53 48 53 54 54 67 57 52 57 57 57 72 63 58 64 61 62
16 2400 .09 55 44 41 41 42 41 66 56 50 53 56 57 70 59 54 58 59 60 75 66 60 65 63 65
3600 .21 62 51 50 50 52 51 69 58 53 54 58 60 72 62 56 58 61 63 78 68 62 65 66 68
4200 .29 64 54 54 53 56 54 70 59 54 54 59 61 73 63 57 58 62 64 79 69 63 65 66 69
NOTES: 1. Based on tests conducted in accordance with ARI Standard 880-2008.
2.ΔPsstatic pressure difference from inlet to discharge.
3.
Δ
Psis the minimum pressure required to deliver CFM shown with primary damper in
wide open position.
A Participating Member
in the ARI 880
Certification Program
Page 5
Non Fan Powered Units
www.carnes.com B-83
APPLICATION/PERFORMANCE DATA | Model AXPA
Model AVW with AXPA Clean Air Silencer
Sound Data (Sound Power by Octave Band)
Discharge Sound Power
Inlet
Minimum ΔΔP
s
1.0” ΔΔP
s
1.5” ΔΔP
s
3.0” ΔΔP
s
Unit
Sound Power (db) by Octave Band Sound Power (db) by Octave Band Sound Power (db) by Octave Band Sound Power (db) by Octave Band
Size
ΔΔ
(2) (3) (4) (5) (6) (7) (2) (3) (4) (5) (6) (7) (2) (3) (4) (5) (6) (7) (2) (3) (4) (5) (6) (7)
(In.) CFM
Ps
125 250 500 1000 2000 4000 125 250 500 1000 2000 4000 125 250 500 1000 2000 4000 125 250 500 1000 2000 4000
75 .02 34 22 16 19 15 17 49 40 32 37 37 38 49 43 35 41 42 42 50 47 41 47 49 49
100 .04 37 25 20 22 20 21 52 43 34 39 40 39 52 46 38 43 44 44 53 50 44 49 51 51
5 200 .14 46 35 29 31 31 29 59 50 41 44 45 44 60 53 44 47 50 48 60 57 50 54 57 55
300 .33 50 40 35 36 38 34 63 54 44 46 48 46 64 57 48 50 53 50 65 61 54 56 60 57
350 .45 52 42 37 38 40 36 65 56 46 47 50 47 65 58 49 51 54 51 66 62 56 57 61 58
110 .02 33 21 15 15 16 19 49 41 33 39 42 39 51 45 38 43 46 43 54 52 45 50 52 49
200 .07 41 32 26 26 30 30 55 46 40 43 46 43 57 50 44 47 50 47 60 57 51 54 56 53
6 300 .15 46 39 33 34 39 37 59 49 44 46 49 47 61 54 48 50 52 50 64 61 55 56 59 56
400 .27 50 44 38 40 46 42 62 52 47 48 51 49 64 56 51 52 54 52 67 63 58 58 60 58
500 .42 52 48 42 44 51 46 65 54 49 49 52 50 67 58 54 53 56 54 70 65 61 60 62 60
140 .01 30 22 18 16 18 20 52 46 43 43 45 44 53 50 47 47 49 48 55 57 55 54 56 55
200 .02 35 27 23 22 24 26 55 48 44 44 47 46 56 52 49 48 51 50 58 58 56 55 58 57
7 400 .11 44 36 35 35 37 37 62 51 47 46 51 50 62 55 51 50 55 54 64 62 59 57 62 61
600 .25 50 41 41 42 44 43 65 53 48 48 53 52 66 57 53 52 57 56 67 64 60 58 64 63
700 .35 52 43 44 45 47 46 66 54 49 48 54 52 67 58 53 52 58 56 69 65 61 59 65 63
185 .03 34 21 16 19 14 14 49 49 38 43 46 44 51 51 43 47 49 48 53 55 51 54 55 56
400 .14 43 33 29 31 30 28 56 53 41 45 48 46 57 55 46 49 51 51 60 59 54 56 57 58
8 600 .29 47 39 36 37 38 35 59 55 43 46 49 47 60 57 48 50 52 52 63 61 56 57 58 59
800 .50 50 44 41 42 44 40 61 56 45 46 50 48 63 59 49 50 53 53 65 63 57 58 59 60
1000 .75 52 47 44 45 49 44 63 58 46 47 50 49 65 60 50 51 54 53 67 64 58 58 60 61
300 .02 41 21 17 16 18 21 55 49 47 54 52 51 57 53 52 59 56 54 59 60 60 66 63 61
500 .05 44 28 26 26 28 29 58 51 49 55 54 54 60 55 53 59 58 58 62 62 61 66 65 64
10 800 .11 47 36 34 36 38 37 61 53 50 55 56 57 62 57 55 60 60 61 65 64 63 67 67 67
1200 .22 49 42 42 44 47 43 63 55 51 56 58 60 65 59 56 60 62 63 67 66 64 67 69 70
1500 .33 50 45 45 48 52 47 64 56 52 56 59 61 66 60 56 60 63 65 69 67 64 68 70 71
430 .03 32 21 19 20 16 17 63 51 44 53 51 48 64 55 49 57 55 51 67 61 56 64 61 56
800 .09 42 33 30 33 32 34 64 54 48 54 56 54 66 58 52 58 59 57 69 65 60 65 65 63
12 1200 .20 49 41 38 41 43 44 65 57 50 54 59 58 68 61 54 58 62 62 70 67 62 65 68 67
1800 .41 55 49 46 49 54 55 67 59 52 55 62 63 69 63 57 59 65 66 72 69 64 66 71 71
2300 .65 59 54 50 54 61 61 68 61 53 55 63 65 69 64 58 59 67 68 72 71 65 66 73 74
600 .01 38 24 17 17 15 16 61 53 53 50 53 53 64 56 55 56 57 57 68 62 58 67 65 63
1000 .04 45 34 27 31 30 32 63 56 55 51 55 57 66 59 57 58 60 61 70 65 60 69 68 68
14 1600 .12 51 43 37 43 44 46 65 58 56 53 58 61 68 61 58 59 62 65 72 67 61 70 70 72
2400 .29 57 51 45 54 56 58 67 60 57 54 60 65 70 63 59 60 64 69 74 69 63 71 72 75
3100 .51 60 56 50 61 64 65 68 61 58 55 61 67 71 64 60 61 66 71 75 70 64 72 74 77
780 .03 37 22 14 15 13 16 59 49 43 51 54 54 62 54 47 56 57 57 67 61 54 64 62 61
1600 .12 49 37 31 32 34 38 63 54 48 53 58 60 66 58 52 57 61 63 71 66 58 65 66 67
16 2400 .26 56 45 40 42 47 50 66 57 50 53 60 63 68 61 54 58 63 66 73 69 61 66 68 70
3600 .56 64 53 50 52 59 62 68 60 53 54 62 67 71 64 57 59 66 69 76 71 63 67 71 74
4200 .74 66 57 54 55 63 66 69 61 54 54 63 68 72 65 57 59 66 71 77 72 64 67 72 75
NOTES: 1. Based on tests conducted in accordance with ARI Standard 880-2008.
2.ΔPsstatic pressure difference from inlet to discharge.
3.
Δ
Psis the minimum pressure required to deliver CFM shown with primary damper in
wide open position.
A Participating Member
in the ARI 880
Certification Program
Page 6
MODEL NUMBERING SYSTEM | Model AXPA
Non Fan Powered Units
B-84 www.carnes.com
A X
P A
0
2
A - Air
Terminal
H - Hanger
Brackets
(Unattached)
B - External Foil
Insulation
X - Shipped
Separately
P - Packless
Silencer
CONNECTION
SIZE HEIGHT WIDTH
01 10 12
02 12-1/2 14
03 15 16
04 17-1/2 20
Consult Factory
for Other Sizes
Design
Model Series Size Options
12345678
[Patent 5,663,535]
RECOMMENDED SPECIFICATION - Model AXPA Clean Air Silencer
GENERAL
Furnish and install Carnes Clean Air Silencers Model
AXPA of the size, capacity and performance as
shown on plans. The air pressure drop and sound
levels for the silencers and terminal units shall not
exceed the values shown on plans. All units shall be
tested in accordance with ARI Standard 880, and will
provide catalog performance without the need for
additional duct to straighten air flow.
CONSTRUCTION
The silencer casing shall be constructed of 22 gauge
galvanized steel, with slip and drive duct connections. The AXPA Silencer shall be designed for direct
connection to Clean Air Terminal Units without using
upstream transitions or flow straightening ducts.
Provide gasketed access door to allow cleaning of
internal chambers. No sound absorptive or fill
material shall be used inside the silencer. Optional
external insulation shall be a minimum 1’’ thick with a
continuous 4 lb./cu. ft. density. The external face of
insulation shall be fiber reinforced foil. The insulation
must meet UL Test 181 for erosion resistance and
NFPA 90A requirements for 250°F continuous
temperature. There shall be NO INSULATION in the
airstream.
Page 7
Non Fan Powered Units
www.carnes.com B-85
DIMENSIONAL DATA | Model AXPA
CLEAN AIR SILENCER
DIMENSIONS LISTED IN INCHES (Millimeters)
UNIT SIZE INLET OUTLET WEIGHT
LBS.
AXPA AV A B C x C
[Kg.]
01 07 - 08 12 (305) 10 (254) 15-1/8 (384) 40 [18]
02 10 14 (356) 12-1/2 (318) 20-1/8 (511) 55 [25]
03 12 16 (405) 15 (381) 20-1/8 (511) 55 [25]
04 14 20 (508) 17-1/2 (445) 24-1/8 (613) 70 [32]
FRONT VIEW
SIDE VIEW
Consult factory for other sizes.
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