Trane Fan manual Selection Procedure, Table S-1 Short Plus Silencer Attenuation 1D Length

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Selection Procedure

1

Select the type of fan desired. The Super Q II should be used where fan radiation noise needs to be attenuated.

2

Position the Q fan to deliver air to the system and minimize adverse Kt effects. Straight-thru flow arrangements are best.

3

Select the desired Q fan or Super Q II fan options.

4

Compute the fan external static pressure and cfm requirements.

5

Determine which Kt effects apply to the Q fan installation.

6

If the Q fan is serving a VAV system, select AC frequency drive or inlet vane modulations. (AC frequency drive modulation is considerably quieter and more efficient than Q fan inlet vanes.) Super Q II fans use AC frequency drive modulation only.

7

Input the selection parameters into the Trane fan selection program and select the desired Q fan or proceed with a manual selection.

8

Manual Selection: a

Determine the air density ratio if non- standard air is being handled by the

Qfan.

b

Adjust the external sp by the air density ratio.

c

Use the inlet and outlet area of the fan to calculate the inlet and outlet velocities. Use these velocities and the inlet and outlet Kt to correct the external static pressure to the right value. Reselect the fan at the right value.

d

From the performance table, select the desired fan.

9

If inlet vane modulation was selected, increase the rpm by 1 percent and increase the bhp by 3 percent.

10

If the air density ratio is nonstandard (different than 1.00), the rpm is correct and the bhp must be multiplied by the air density ratio.

11

If the start-up air temperature is lower than the normal operating temperature, adjust the fan curve bhp for the starting temperature. The next larger nominal hp motor is the correct motor size.

12

If exceptional quiet is desired, choose a short or long Q fan plus duct silencer. The plus silencer is a low turbulence, low pressure drop, high attenuation duct silencer. Subtract the attenuations given inTables S-1 and S-2 from the Q fan/Super Q II fan sound power projections. If silencer regenerated noise is a concern, contact your local Trane sales engineer for further information.

Table S-1 — Short Plus Silencer Attenuation (1D Length)*

Q-Fan Sound Power By Octave Band At Nominal Cfm/SP

Fan Size

63 Hz

125 HZ

250 Hz

500 Hz

1000 Hz

2000 Hz

4000 Hz

8000 Hz

16

2

3

10

16

19

20

13

12

19

2

3

10

16

19

19

13

12

21

2

4

10

16

19

19

13

11

24

3

4

10

16

19

19

13

10

27

3

5

10

16

19

19

13

9

30

4

5

10

16

19

17

13

9

36

4

6

10

16

19

15

13

9

40

5

6

11

16

19

14

12

9

44

5

6

11

16

19

14

11

9

Table S-2 — Long Plus Silencer Attenuation (2D Length)*

Q-Fan Sound Power By Octave Band At Nominal Cfm/SP

Fan Size

63 Hz

125 HZ

250 Hz

500 Hz

1000 Hz

2000 Hz

4000 Hz

8000 Hz

16

3

6

19

32

37

39

26

24

19

3

6

19

32

37

37

26

24

21

4

7

19

32

37

37

26

22

24

5

8

19

32

37

37

26

20

27

6

9

19

32

37

37

26

18

30

7

9

20

32

37

34

26

18

36

8

11

20

32

37

30

25

18

40

9

11

21

32

37

28

23

18

44

9

12

21

32

37

28

22

18

*Approximate attenuations. Use theTrane Fan Selection Program for attenuation predictions that include silencer regenerated self-noise.

NOTE: Super Q II not available with Class III fans.

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Contents August Model Q Fans Sizes 16 through Super Q II Fans FAN-DS-2Features and Benefits Contents Trane Model Q fans require up to Features BenefitsSuper Q II Accessories Variable Air Volume CompatibleSuper Q II Fan Super QPlus Silencer Trane Plus Duct SilencerStatic regain Airflow This provides smooth, spiral-free discharge Aerodynamic Air PathDraw-Thru Supply Application Small Capacity Features Benefits Saving Valuable Equipment Room SpaceFigure F-5 Draw-Thru Supply Application Large CapacityLower Installation Costs Features Benefits Reduce Installed Cost By UpTo 20 PercentTable F-1 Total Installed Cost Comparison First Cost ComparisonsModel Number Description Valid Select Prod Able Cat DescriptionValid Select Prod Able Prod. able Cat Description Application Considerations AbbreviationsSystem System Curve Fan Performance Curves Performance Data DeterminationFan Option Kt Corrections Table A-1 Q Fan/Super Q II Fan Installation Kt CorrectionsUnducted Plenum Inlet Unducted Outlet Ducted Inlet Ducted OutletFigure A-5 VAV System Modulation Curve Super Q II Fan Modulation AC Inverter Capacity ControlFigure A-6 Inlet Vane Performance Parallel Fan Operation Motor and Drive SelectionTable A-3 Maximum Torque For Operation Of InletVanes Table A-4 Parallel OperationOperating Cost/Efficiency Recommended Super Q II NC40 Plenum ConfigurationFan Sound Data Trane Acoustics ProgramTable A-5 Inlet Vane Sound Data Selection Procedure Table S-1 Short Plus Silencer Attenuation 1D LengthTable S-2 Long Plus Silencer Attenuation 2D Length Data PerformanceFan Size Minimum Fan RPM Without Vfrb OptionMinimum and Maximum Motor HP Ranges Performance Fan Data Super Q SizeTable P-2 Size 19 Q Fan Performance Fan Data Super Q Size Table P-3 Size 21 Q-Fan Performance Fan Data Super Q Size Table P-4 Size 24 Q-Fan Arrangement 15-30 Table P-5 Size 27 Q-Fan Arrangement Table P-6 Size 30 Q-Fan Performance Fan Data Super Q Size Table P-7 Size 33 Q-Fan Performance Fan Data Super Q Size Table P-8 Size 36 Q-Fan Performance Fan Data Super Q Size Table P-9 Size 40 Q Fan Performance Fan Data Super Q Size Table P-10 Size 44 Q-Fan Performance Fan Data Super Q Size Minimum Fan RPM Without Vfrb Option Fan Table P-12 Size 54 Q-Fan Fan Table P-13 Size 60 Q-Fan Fan Dimensional Data Weights Arrangement 9 Dimensions OutArrangement Arrangement1 Arrangement 1 Dimensions OutArrangement 9 Dimensions Figure D-1 Q Fan Inlet Vanes Table D-1 Inlet Vane Dimensions DimensionalFigure D-3 Super Q II 16-44 Sizes Table D-3 Table D-5 Long Outlet Plus Silencer Mechanical Specifications Inlet Screen Q, SQ2 Adjustable Inlet VanesInlet Bellmouth Q, SQ2 Inlet Flange QFAN-DS-2

Fan specifications

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