AbsolutAire EPF User Manual

BULLETIN 470

Twin City Fan & Blower

E-SERIES PLENUM FANS

TYPE EPF, EPFN (High Efficiency) TYPE EPQ, EPQN (Better Sound Quality)

January 2007

E-Series Plenum Fans

Twin City Fan & Blower, the world’s largest supplier of plenum fans, now offers the completely redesigned E-Series, the first plenum fan to be AMCA licensed for sound and air in both an Arrangement 1 and 3 configuration.

The E-Series offers the flexibility of two plenum fan designs, with each model offering its own unique performance characteristics. While every E-Series fan is highly efficient and quiet, you can choose an E-Series design option that optimizes the performance requirements most important to your application.

9-Bladed Wheel Models

EPF (Arr. 3)

The model EPF features a highly efficient and cost effective, nine-bladed airfoil wheel design. The high efficien cy of the EPF will often allow the use of smaller fans without increasing power requirements. The EPF is an Arrangement 3 design.

Arrg. 3 EPF Plenum Fan

EPFN (Arr. 1 and 4)

The model EPFN features the same highly efficient, ninebladed airfoil wheel design as the EPF, but is available in Arrangement 1 or 4 designs without inlet obstructions.

12-Bladed Wheel Models

EPQ (Arr. 3)

The Better Sound Quality model EPQ features a twelve-bladed airfoil wheel design that flattens the sound spectrum and reduces the dominance of pure tones. The EPQ is an Arrangement 3 design.

EPQN (Arr. 1 and 4)

The model EPQN features the same Better Sound Quality, twelve-bladed airfoil wheel design as the EPQ, but is available in Arrangement 1 or 4 without inlet obstructions.

Twin City Fan & Blower certifies that the Type EPF, EPFN, EPQ & EPQN Plenum Fans shown herein are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and AMCA Publication 311 and comply with the requirements of the AMCA Certified Ratings Program.

Refer to Bulletin 475 for sound power levels.

Ultra Low Vibration Options

The standard E-Series plenum fans already offers a low vibration design, but when faced with stringent vibration require ments, Twin City Fan & Blower offers patent pending Ultra Low Vibration (ULV) designs with a full spectrum dynamic balance.

Along with the ULV balance guarantee, a full vibration report is provided that includes a summary of banded spectrum lim its, spectrum plots on 3 axes, a waterfall (cascade) plot, a time waveform plot, and a transient capture (coast down) plot.

Compact Designs with Performance Assurance

Space is often a key consideration in the selection of plenum fans, making the compact Arrangement 3 configuration very popular.

The Arrangement 3 configuration is constructed with a bear ing and bearing bar in the inlet, which will affect fan per formance. These performance affects should be taken into account to ensure that your system functions as designed.

As the leading supplier of plenum fans, Twin City Fan & Blower understands the importance of having confidence in performance ratings. Twin City Fan provides our custom ers that confidence as the only plenum fan manufacturer to offer AMCA licensed sound and air performance on both the Arrangement 1 and 3 fan designs.

Bulletin illustrations cover the general appearance of Twin City Fan & Blower products at the time of

publication and we reserve the right to make changes in design and construction at any time without notice.

Twin City Bulletin 4702

Application Information

Plenum fans are unhoused fans designed to operate inside of field-fabricated or factory-built air handling units.

The fan wheel pressurizes the entire surrounding air plenum in which the fan is installed, allowing air ducts from any direc tion to be directly connected to the air handling unit enclosure. This design generally saves space by eliminating the fan hous ing, transitions, and diffusers within the air handling unit.

Plenum fans have found a ready acceptance in the air con ditioning industry. In addition, the construction versatility, adaptability in the direction of the discharges, suitability for internal isolation and application of sound panels, and gener ally lower cost makes it a very popular fan arrangement.

EPQ / EPQN Advantage

The EPQ/EPQN plenum fans offers unique performance features that are beneficial for many sound sensitive and higher pressure applications.

The EPQ/EPQN features a twelve-bladed airfoil wheel versus the nine-bladed wheel of our type EPF/EPFN plenum fans or eight- to ten-bladed wheels with most other competition. The "Q" in the EPQ/EPQN designation stands for Better Noise Quality. Noise quality is a subjective description for noise that is less objectionable.

Looking at the sound comparison, you will notice that the type EPQ/EPQN offers noise (SPL) that is more equally distrib uted across all frequencies. This can be more pleasant to hear than the sound characteristics of a nine-bladed design. Fans are often dominated in noise by the noise occurring at the blade pass frequency. (Blade pass frequency = RPM x Number of blades/60.) Noise quality is improved by reducing the dif ference in amplitude between the blade pass amplitudes and the neighboring frequency amplitudes. The increased higher frequency sound power levels on the twelve-bladed wheels mask the blade pass frequency offering a better sounding fan. Although the overall A-weighted sound power levels of the nine-bladed EPF/EPFN fans are slightly lower, the sound "quality" of the twelve-bladed EPQ/EPQN fans may be desirable for the application.

Benefits of a Plenum Fan

Saves Space – There are no housings, transitions, or diffusers within the air handling unit.

Efficiency – Plenum fans can be as efficient or more efficient than scroll type fans at specific operating points towards the

bottom of the fan curve.

Lower cost – Plenum fans are less expensive than scroll type

fans.

will move the blade pass frequency from the second octave band to the third octave band. Acoustic silencers will normally perform about 10 dB better in the third band.

In addition to sound considerations, there are also addi tional benefits to using the EPQ/EPQN at higher pressures. Selections over 8" wg static pressure are often near the peak pressure of the fan. The additional blades give a higher peak pressure and also add stability to the fan. Twelve smaller passages through the fan wheel are more resistant to flow disturbances on the inlet than nine larger passages. The EPQ/ EPQN is thus more resistant to system effects when operating at high pressures and the higher inlet velocities that accom

pany these selections.

A higher blade pass frequency allows for easier attenuation of the noise, especially when installed inside an air handler cabi net. In many applications, the use of the EPQ/EPQN design

TYPE CFM

EPQN – 12 Blades 20,000 3 977 13.42 86 89 90 83 81 77 69 64 87

EPFN – 9 Blades 20,000 3 967 12.92 89 94 87 79 80 74 67 63 85

NOTE: Circled figures indicate blade pass frequency.

Twin City Bulletin 470 3

SP RPM BHP

Arrg. 1 EPQN Plenum Fan

FREQUENCY, HZ

63 125 250 500 1000 2000 4000 8000

LwA

Construction Features

Wheels

High efficiency, non-overloading airfoil wheels are provided on all sizes and arrangements.

Arr. 1 and 3 – Aluminum wheels using extruded aluminum blades are standard to size 245 on arrangement 1 and 3 fans, and available as an option on larger sizes. Steel wheels are standard on sizes 270 and larger.

Arr. 4 – Aluminum wheels using extruded aluminum blades are standard to size 600 on direct drive arrangement 4 fans, a popular choice for applications requiring precision balance and improved reliability.

Inlet Cones

Heavy-gauge, spun steel inlet cones are closely matched to the wheel intake rim to ensure efficient and quiet operation.

Structural Frame

Frames are constructed of heavy-gauge steel, continuously welded at all connections for maximum strength and rigidity. The “cross frame” bearing support is designed for maximum stability and load distribution.

Arrg. 4 EPFN Plenum Fan

Shafts

Shafts are AISI Grade 1040 or 1045 hot-rolled steel accurately turned, ground, polished, and ring-gauged for verification. Shafts are generously sized for a first critical speed of at least

1.43 times the maximum speed for the class.

Fan Bearings

Either ball (adapter mount) or spherical roller, heavy-duty, self-aligning, pillow block type bearings are provided. Bearing selection is based on minimum L-10 life of 80,000 hours. Considering the long life offered with our standard bearing selections, we do not recommend upgrades to split-roller bear ings due to their large size, especially on Arrangement 3 fans.

Inlet Collar

Horizontal configurations are designed to be flex-connected to the perimeter of the square panel without the addition of an inlet collar.

Arrg. 4 EPFN Plenum Fan

Twin City Bulletin 4704

Flow Measurement System

STATIC PRESSURE TAP

PIEZOMETER RING

HIGH PRESSURE SIDE

LOW PRESSURE SIDE

Piezometer Ring (Airflow Measuring System)

A piezometer ring is available on plenum fans, as well as other Twin City Fan housed fans, as part of an airflow measuring system, based on the principle of a flow nozzle. The inlet cone of the fan is used as the flow nozzle. The flow can be calcu lated by measuring the pressure drop through the inlet cone. No tubes or sensors are inserted in the high velocity airstream which could obstruct airflow. The system, consists of a piezometer ring mounted at the throat and a static pressure tap mounted on the face of the inlet cone. A differential pressure transducer and digital dis play can also be provided. The pressure drop is measured from the tap located on the face of the inlet cone to the piezometer ring in the throat. The inlet tap is connected to the high-pressure side of the transducer and the piezometer ring is connected to the low-pressure side. See diagram on right. Based on Twin City Fan laboratory tests, the system was determined to be accurate within +/-5%. Refer to Twin City Fan Engineering Supplement ES-105.

NOTE: Twin City Fan does not recommend place ment of flow measuring probes inside the fan inlet cone in the path of airflow. These devices create disturbances and unpredictable performance losses. Twin City Fan will not be responsible for loss of per formance due to such devices.

Inlet Tap Mounted on Face of Inlet Cone

Piezometer Ring Mounted at Throat of Inlet Cone

Accessories

Variable Inlet Vanes

Variable inlet vanes provide economical, stable, and efficient air volume control for manual or motorized operation. Blades are supported with fatigue-resistant steel shafts and two needle roller bearings riding on zone-hardened surfaces to minimize wear. Bearings are lubricated for life with high grade moisture resistant grease and protected with lip seals. The vane bearing housings are welded in position and stiffened with a welded support ring. The welded structure eliminates flutter and vibration while utilizing a cantilevered design to minimize insertion loss. NOTE: Inlet vanes are not recommended on fans smaller than size 182 due to noise and performance loss.

Inlet Screen

Heavy-gauge barbecue grille style inlet screen that nests in the inlet funnel for personnel protection on non-ducted inlets.

Inlet Collar

The standard, square-panel design provides the means for flex connecting on all arrangements without an inlet collar.

Belt Guard

Provides protection to personnel from the moving drive parts. Both standard and OSHA totally enclosed types are available.

Protective Enclosure

Grill style protective enclosure completely encloses all sides and the back of the fan wheel. Side panels are individually removable to provide access to the wheel.

Arrg. 3 EPQ Plenum Fan with Optional Protective Enclosure, uni tart base, and belt gaurd

NOTE: On belt driven units, a belt guard should be used for full protection.

Twin City Bulletin 470 5

Arrangements

Arrangement 1

Arrangement 1 features an overhung wheel design suitable for V-belt drive and requires mounting of motor independent of the fan.

Models EPFN and EPQN.

Class I and II available in sizes 122 to 730. See dimensional drawing on page 28.

Class III available in sizes 182 to 730. Contact factory for dimensional drawing.

Arrangement 3 (Horizontal)

This is the most common plenum fan arrangement for use in OEM and site-built air handlers. Arrangement 3 is suitable for V-belt drive and requires mounting of the motor independently of the fan. Twin City Fan & Blower offers common unitary bases and isolation bases for the fan and motor as accessories.

Models EPF and EPQ.

Class I and II available in sizes 122 to 730. See dimensional drawing on page 29.

Class III available in sizes 182 to 730. See dimensional drawings on page 30.

Arrangements 3HS and 3HA (Horizontal with Top Mounted Motor)

Arrangements 3HS and 3HA provide a means for mounting the motor on top of the unit. This design is often desirable when floor space is limited.

Available with two different motor mounting options: slide base type (Arrangement 3HS) and adjustable motor base (Arrangement 3HA). Due to limited belt center range, NEMA “slide base” option is available on sizes 182 and larger only. A heavy duty Twin City Fan & Blower designed “adjustable motor base” is available for all fan sizes.

Models EPF and EPQ.

Arrangement 3HS is available in Class I and II with motor slide base for sizes 182 to 542. See dimensional drawing on page 32.

Arrangement 3HA with pivot motor base is available in Class I and II for sizes 122 to 542. See dimensional drawing on page 32.

Arrg. 3HS

Arrg. 3HA

Twin City Bulletin 4706

Arrangements

Arrangement 3SM (Horizontal With Side Mounted Motor)

Arrangement 3SM is designed to provide an economical and space-saving means to supply plenum fans with motors mounted to the side of the fan frame. A motor slide base allows for quick and easy belt adjustments.

Models EPF and EPQ.

Class I and II available in sizes 165 to 600. Motor limited to maximum frame

size shown on drawing.

See dimensional drawing on page 31.

Arrangements 3VS and 3VA (Vertical with Side Mounted Motor)

Vertical Arrangement 3 is available with two different motor mounting options: slide base type (Arrangement 3VS) and adjustable motor base (Arrangement 3VA). Due to limited belt center range, NEMA “slide base” option is available on sizes 182 and larger only. A heavy duty Twin City Fan & Blower designed “adjustable motor base” is available for all fan sizes.

Models EPF and EPQ.

Arrangement 3VS is available in Class I and II with motor slide base for sizes 182 to 542. See dimensional drawing on page 33.

Arrangement 3VA with pivot motor base is available in Class I and II for sizes 122 to 542. See dimensional drawing on page 33.

Unless specified otherwise, units will be built for vertical up airflow.

Inlet collar is now optional on 3VS, 3VA

Arrg. 3VS Arrg. 3VA

Shown with optional Inlet collar.

Arrangement 4 (Horizontal)

Direct drive Arrangement 4 mounts the fan wheel directly onto the motor shaft. This arrangement provides a compact fan/motor unit which eliminates belt resi due and requires less maintenance than other arrangements.

For these reasons, Arrangement 4 plenum fans are widely used in cleanroom, pharmaceutical, and other critical applications.

Fans can be selected with varying wheel widths to provide desired performance at direct drive motor speeds. Performance changes in the field are usually achieved by means of variable inlet vanes or VFD.

Models EPFN and EPQN.

Aluminum wheels using extruded aluminum blades are standard.

Class I and II available in sizes 122 to 600.

Class III available in sizes 182 to 600.

See dimensional drawing on page 34.

Twin City Bulletin 470 7

Flow Parallel To Fan Shaft

Radial

Discharge

Without Bellmouth

Bellmouth

Radial Discharge

Without Duct or Bellmouth

Duct Entrance Losses From Plenum Fan Cabinet

To achieve the air velocity in the discharge duct and overcome the loss associated with the air entering the ductwork, additional resistance must be added to the external static pressure (ESP) requirements of the fan. Different types of duct entrances and loca tions will require varying correction factors. Therefore, prior to selecting a fan, make the following correction, depending upon the type of duct and its location.

ADDITIONAL DUCT ENTRANCE LOSS TO BE ADDED TO FAN ESP

DISCHARGE TYPE CORRECTION FACTOR

l Radial and ducted with bellmouth 1.1 x Duct Velocity Pressure

l Radial and ducted without bellmouth 1.4 x Duct Velocity Pressure l Radial without duct or bellmouth 1.8 x Duct Velocity Pressure l Flow parallel to shaft and ducted 1.6 x Duct Velocity Pressure with bellmouth l Flow parallel to shaft and ducted 1.9 x Duct Velocity Pressure without bellmouth l Flow parallel to shaft without duct 2.4 x Duct Velocity Pressure or bellmouth

Example: A system requires 30,000 CFM at 5" SP at standard air density with one 4 ft diameter duct with bell-mouth placed in a radial dis-

charge. Determine RPM and brake horsepower:

Duct area = (4 Duct velocity = 30,000 ÷ 12.57 = 2387 FPM Duct velocity pressure = (2387 ÷ 4005)

x p) ÷ 4 = 12.57 ft

= 0.355 @ std. cond.

Entrance loss correction factor = 1.1 x duct velocity pressure = 1.1 x 0.355 = 0.39 Thus, select the fan for = 5" + 0.39" = 5.39" S.P.

Application Guidelines

Fan Selection Recommendations

1. System effect losses (see AMCA 201) and plenum losses should be estimated and added to the required static pressure, prior to making selections. Refer to AMCA Publication 201 at www.amca.org and Twin City Fan Engineering Data Letter “Fan Performance Troubleshooting Guide” (ED-100) at www.tcf.com.

2. Fans should be selected so that the point of operation is approximately between 55% and 90% of the free delivery point on the fan curve.

3. Avoid selections over 4000 RPM. A narrow width, larger size impeller can be used to avoid this.

4. Arrangements 1 and 4 will offer the best efficiency and lowest noise as there are no inlet obstructions.

5. Where space is available, mount the fan and motor on a sub-base. The motor can be mounted on the fan on Arrangements 3HS, 3HA, 3SM, 3VS, and 3VA.

6. Use inertia-type isolation bases or rigid mounting for low est fan vibration. Rigid mounting requires dynamic analysis (by others) of the support structure to avoid resonance.

7. Applications exceeding 10" SP are prone to high system effect losses. Use of housed fans (BAE-DWDI) should be considered.

8. Where static pressures over 8" wg are required, Type EPQ or EPQN are preferred because of lower operating speeds and improved stability. Select the fan so the design pressure is at least 10% below the peak pressure.

9. Where flow monitoring is required, use a piezometer ring or externally mounted flow measurement station. Fan per formance may be substantially affected by flow measure ment probes mounted directly in the fan inlet cone. Refer to page 5.

10. For direct drive fans without speed control (or where speed control cannot exceed 60 Hz), select fans at 3 – 5% below the nominal speed of the motor. This will normally cover the uncertainties associated with the system and air balancer’s measurements. Select motors loaded no closer than 90% of the maximum loading of the motor.

11. For multiple fans in a plenum, alternate CW and CCW rotation fans to minimize losses. If fans are not counterrotating, install walls between each fan to create cells in the outlet plenum.

12. Add losses for duct take-offs per the chart above to pressure requirements of the fan. Bellmouth entries will always reduce losses and are recommended.

13. For highest reliability, specify the required bearing life. For example, the statement “minimum L-10 bearing life = 100,000 hours” allows for the best bearing to be put on the fan without

creating other problems. Some specifications state “use split roller bearings.” This can cause a number of problems, such as:

1. On smaller fans, there may not be enough radial load to prevent roller skidding. This is especially a problem for Arrangement 3 fans.

2. Split roller bearings are not offered in sizes smaller than

∕16" bore. Smaller fans use shafts smaller than this.

3. The oversized bearing in the inlet will block some air in smaller fans (above the losses that are already included in the EPF/EPQ ratings).

Twin City Bulletin 4708

BAFFLE

AIRFLOW

TWO FANS

THREE FANS

H / 2

W /

W / 6

'W' MINIMUM =

W /

H /

W /

'W' MINIMUM = 4D

W / 4

'H' MINIMUM

= 2D

'H' MINIMUM

= 2D

D D

Application Guidelines

(A-D)/2, BUT NOT

LESS THAN 'D'

('E' MINIMUM = 'D')

A/2

MAX

D/2 MINIMUM

RECOMMENDED

TAKE-OFFS PAST PLANE OF FAN IMPELLER

INLET SPIN

BREAKER

ACCESSORY

D/2

Location and Placement of Fans in Air Handlers

1. Center the fan inlets in both the horizontal and vertical planes.

2. For inlet clearance, see Figure 1. The flow should converge at an angle not greater than 45° when approaching the opening for the fan inlet. A minimum of one fan wheel diameter clearance is recommended.

3. In the fan outlet plenum, a minimum wall clearance of one-half fan wheel diameter to the periphery of the fan wheel is recommended.

4. Figure 1 shows that the minimum clearance between the back of the fan wheel and the nearest component down stream (Dim. E) should be one wheel diameter. Small clearances do not allow the flow to equalize behind the fan wheel and the pressure drop of the downstream compo nent is increased.

5. When the flow enters the inlet plenum perpendicular to the fan shaft, large system effect losses can occur. See Figure 2 for a recommended flow baffle or a vortex breaker that may help preserve rated fan performance.

6. When two or more fans are installed in a plenum, divide the plenum into imaginary cells of equal area. Center the fan inlets on each cell. See Figure 3.

Installation Recommendations

1. Install the fan so the flexible connector on the inlet remains uncollapsed during operation.

2. Install thrust restraints (snubbers) to maintain the axial position of the fan when it is generating pressure.

3. Peripheral equipment, such as electrical components,

inverters, control panels, etc., should be positioned away from the high velocity air entering or leaving the fan.

4. Adjust springs on the isolation base so that spring deflec tion is approximately equal for all isolators.

5. Follow safety, installation, start-up, and maintenance instructions supplied with each fan.

Figure 1. Recommended Location of Fan in Plenum

Figure 2. Flow Baffle and Vortex Spin Breaker Location

Figure 3. Location of Counter-Rotating Fans

NOTE: ‘D’= Wheel diameter

Twin City Bulletin 470 9

Engineering Data

Maximum RPM, Wheel Weights, & WR2 – EPF and EPFN

EPF EPFN (70°F) (LB)

122 12.40 3388 9 0.9 N/A N/A 4000 9 0.9 N/A N/A N/A N/A N/A N/A N/A

150 13.98 3006 12 1.7 N/A N/A 3909 12 1.7 N/A N/A N/A N/A N/A N/A N/A 165 15.75 2668 15 2.9 N/A N/A 3468 15 2.9 N/A N/A N/A N/A N/A N/A N/A

182 18.25 2302 17 6.1 N/A N/A 2930 18 6.1 N/A N/A 3767 21 6.2 N/A N/A 200 20.00 2101 21 6.4 N/A N/A 2674 21 7.4 N/A N/A 3438 24 9.3 N/A N/A 222 22.25 1888 30 12 N/A N/A 2403 30 12 N/A N/A 3090 34 15 N/A N/A

245 24.50 1715 35 21 N/A N/A 2183 35 21 N/A N/A 2806 38 22 N/A N/A 270 27.00 1556 40 29 85 84 1981 40 29 97 93 2546 47 32 131 125 300 30.00 1401 49 46 103 120 1783 54 51 111 128 2291 58 52 153 178

330 33.00 1273 62 70 136 194 1620 67 76 154 215 2083 72 77 206 294 365 36.50 1151 73 103 157 273 1465 79 112 179 306 1884 84 114 237 409 402 40.25 1044 85 151 180 376 1329 93 165 209 429 1708 98 166 310 647

445 44.50 944 126 233 327 880 1202 135 253 351 932 1545 142 256 470 1255 490 49.00 857 164 391 366 1171 1091 164 391 395 1249 1403 174 535 535 1708 542 54.25 775 227 632 513 2048 986 227 632 653 2562 1267 239 673 696 2778

600 60.00 700 255 931 662 3224 891 255 931 750 3542 1146 270 991 801 3838 660 66.00 637 346 1377 953 5621 810 346 1377 1099 6510 1041 371 1478 1016 5910 730 73.00 576 412 2049 1076 7630 733 499 2671 1153 8058 942 550 2985 1318 9290

Maximum RPM, Wheel Weights, & WR2 – EPQ and EPQN

EPQ EPQN (70°F) (LB)

122 12.40 3388 10 2.1 N/A N/A 4000 10 2.1 N/A N/A N/A N/A N/A N/A N/A

150 13.98 3006 13 3.3 N/A N/A 3909 13 3.3 N/A N/A N/A N/A N/A N/A N/A 165 15.75 2668 17 5.2 N/A N/A 3468 17 5.2 N/A N/A N/A N/A N/A N/A N/A

182 18.25 2302 20 7.2 N/A N/A 2930 20 7.2 N/A N/A 3767 23 7.4 N/A N/A 200 20.00 2101 24 10 N/A N/A 2674 24 8.4 N/A N/A 3438 27 10 N/A N/A 222 22.25 1888 34 14 N/A N/A 2403 34 14 N/A N/A 3090 38 17 N/A N/A

245 24.50 1715 39 24 N/A N/A 2183 39 24 N/A N/A 2806 43 24 N/A N/A 270 27.00 1556 46 35 96 94 1981 46 35 107 104 2546 53 38 142 135 300 30.00 1401 57 55 116 135 1783 61 59 124 144 2291 65 59 166 193

330 33.00 1273 72 81 151 216 1620 77 87 169 237 2083 82 88 222 316 365 36.50 1151 85 120 176 307 1465 91 129 199 340 1884 96 130 257 443 402 40.25 1044 99 176 203 425 1329 107 190 232 479 1708 112 190 345 721

445 44.50 944 141 274 356 955 1202 150 294 379 1007 1545 157 297 512 1367 490 49.00 857 183 451 400 1281 1091 183 451 429 1359 1403 200 481 586 1872 542 54.25 775 250 722 551 2213 986 250 722 716 2808 1267 262 763 759 3024

600 60.00 700 290 1058 740 3573 891 290 1058 824 3891 1146 305 1118 874 4188 660 66.00 637 380 1574 1047 6161 810 380 1574 1110 6450 1041 405 1675 1193 7050 730 73.00 576 454 2342 1191 8438 733 541 2964 1267 8865 942 592 3278 1433 10097

*Consult factory for fans over 4000 RPM.

CLASS I CLASS II CLASS III

WHEEL

MAX. ALUMINUM STEEL MAX. ALUMINUM STEEL MAX. ALUMINUM STEEL

DIA.

RPM WT. WR

(IN.)

CLASS I CLASS II CLASS III

WHEEL

MAX. ALUMINUM STEEL MAX. ALUMINUM STEEL MAX. ALUMINUM STEEL

DIA.

RPM WT. WR

(IN.)

WT. WR2 RPM WT. WR2 WT. WR2 RPM WT. WR2 WT. WR

(LB-FT2)

(LB)

WT. WR2 RPM WT. WR2 WT. WR2 RPM WT. WR2 WT. WR

(LB-FT2)

(LB)

(LB-FT2)

(70°F) (LB)

(LB-FT2) (LB)

(LB-FT2)

(70°F) (LB)

(LB-FT2)

Contact factory for belt driven fans above 150 HP.

(LB)

(LB-FT2)

Bare Fan Weights

WHEEL ARR. 1 (EPQN) ARR. 3 (EPQ) ARR. 4 (EPQN) SIZE DIA. (IN.)

122 12.40 93 94 N/A 79 79 N/A 83 83 N/A

150 13.98 115 117 N/A 99 101 N/A 102 102 N/A 165 15.75 133 135 N/A 114 116 N/A 120 120 N/A

182 18.25 165 169 188 143 147 164 149 150 166 200 20.00 192 192 213 167 167 186 172 172 190 222 22.25 242 246 272 209 209 238 221 221 243

245 24.50 283 288 317 245 251 277 254 254 279 270 27.00 395 412 478 342 359 429 362 374 436 300 30.00 498 506 587 432 448 524 452 461 538

330 33.00 607 633 732 526 561 654 559 578 673 365 36.50 764 804 923 670 714 811 709 732 845 402 40.25 876 915 1096 762 814 986 808 838 1016

445 44.50 1291 1326 1551 1132 1183 1431 1204 1229 1452 490 49.00 1485 1527 1776 1289 1347 1633 1383 1413 1674 542 54.25 1834 2031 2183 1628 1813 1987 1725 1899 2059

600 60.00 2086 2204 2365 1904 2036 2231 1942 2030 2200 660 66.00 2619 2724 2932 2433 2558 2810 2085 2135 2343 730 73.00 2996 3117 3428 2848 2924 3283 N/A N/A N/A

CL I CL II CL III CL I CL II CL III CL I CL II CL III

NOTES:

1. Arrangement 1 and 3 weights include an aluminum wheel on size 122 through 245, and a steel wheel on size 270 through

730.

2. Arrangement 4 weights include an aluminum wheel on all sizes.

3. Weights are for the 12-bladed wheel design (EPQ and EPQN). 9-bladed designs (EPF and EPFN) are slightly less and can be reduced by the difference between the wheel weights shown above.

4. Weights do not include motor, drive, motor base, or slide base.

Twin City Bulletin 47010

Performance Data

122 EPFN (9-Blade, Arr. 1 and 4)

1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 8" SP 9" SP 10" SP 12" SP

CFM

RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP

1000 1660 0.25 2151 0.54 1100 1734 0.28 2182 0.57 1200 1811 0.31 2224 0.61 2630 0.98 1400 1966 0.38

1600 2124 0.46 2486 0.81 1800 2291 0.55 2642 0.94 2000 2466 0.65 2796 1.09 3076 1.53 2200 2647 0.77 2953 1.25 3232 1.73 3467 2.22

2400 2831 0.90 3116 1.42 3386 1.94 3623 2.48 3831 3.02 2800 3204 1.22 3462 1.81 3702 2.43 3931 3.03 3200 3582 1.62 3824 2.28 3600 3966 2.12

MAXIMUM RPM: CLASS I = 3388 CLASS II = 4000 Selections above 4000 RPM not recommended. Consult factory.

2338 0.70 2693 1.08 3039 1.51

2792 1.20 3103 1.65 3406 2.14 2924 1.35 3197 1.81 3473 2.31 3744 2.86

3320 2.00 3568 2.51 3817 3.07

3687 2.74 3913 3.31

122 EPF (9-Blade, Arr. 3)

1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 8" SP 9" SP 10" SP 12" SP

CFM

RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP

1000 1699 0.27 2135 0.53 1100 1771 0.30 1200 1848 0.33 1400 2013 0.41 2392 0.76

1600 2187 0.50 2538 0.87 2851 1.29 1800 2367 0.60 2696 1.01 2991 1.46 3260 2000 2553 0.73 2864 1.17 3140 1.64 3397 2.16 3636 2.69 2200 2742 0.88 3038 1.34 3298 1.84 3542 2.39 3773 2.97 3990 3.55

2400 2934 1.04 3216 1.55 3465 2.08 3696 2.64 3916 3.25 2800 3326 1.44 3583 2.03 3814 2.62 3200 3726 1.95 3962 2.62 3600

MAXIMUM RPM: CLASS I = 3388 CLASS II = 4000 Selections above 4000 RPM not recommended. Consult factory.

2189 0.58 2256 0.64 2605 0.97

2715 1.12 3013 1.50

3125 1.71 3384 2.13

1.94 3501 2.40 3730 2.87 3968 3.39

Wheel Diameter: 12.38" Max. BHP = 0.056 x (RPM / 1000)

3854 3.20

122 EPQN (12-Blade, Arr. 1 and 4)

1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 8" SP 9" SP 10" SP 12" SP

CFM

RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP

1000 1644 0.27 2046 0.53 1100 1721 0.30 1200 1799 0.34 1400 1963 0.42 2315 0.75

1600 2132 0.51 2468 0.89 2752 1.27 1800 2302 0.61 2627 1.04 2899 1.47 2000 2475 0.72 2792 1.20 3054 1.68 3289 2200 2654 0.86 2961 1.37 3214 1.90 3441 2.43 3650 2.95

2400 2839 1.01 3131 1.56 3378 2.14 3598 2.72 3802 3.30 3991 3.86 2800 3222 1.40 3475 2.00 3717 2.67 3925 3.34 3200 3616 1.91 3835 2.55 3600

MAXIMUM RPM: CLASS I = 3388 CLASS II = 4000 Selections above 4000 RPM not recommended. Consult factory.

2106 0.58 2173 0.63 2494 0.96

2614 1.11 2886 1.49

3007 1.68 3245 2.12 3144 1.90 3370 2.37 3581 2.86 3795 3.38

2.16 3507 2.64 3711 3.16 3902 3.69

122 EPQ (12-Blade, Arr. 3)

1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 8" SP 9" SP 10" SP 12" SP

CFM

RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP

1000 1672 0.28 2076 0.55 1100 1752 0.31 1200 1834 0.35 1400 2006 0.44 2353 0.78

1600 2185 0.54 2514 0.92 2795 1.32 1800 2370 0.67 2681 1.08 2949 1.51 3193 1.98 2000 2560 0.82 2855 1.26 3112 1.73 3344 2200 2754 0.99 3034 1.47 3279 1.97 3504 2.50 3710 3.05 3907

2400 2950 1.18 3216 1.70 3453 2.25 3668 2.81 3869 3.39 2800 3347 1.66 3594 2.26 3811 2.88 3200 3751 2.26 3981 2.96 3600

MAXIMUM RPM: CLASS I = 3388 CLASS II = 4000 Selections above 4000 RPM not recommended. Consult factory.

Class I = First white section Class II = Blue shaded section Underlined figures indicate Maximum Static Efficiency

2137 0.60 2206 0.66 2530 0.98

2654 1.14 2928 1.53

3053 1.74 3292 2.18

3421 2.45 3634 2.94 3850 3.45

2.23 3561 2.74 3767 3.27 3960 3.80

Wheel Diameter: 12.38" Max. BHP = 0.062 x (RPM / 1000)

3848 3.49

Wheel Diameter: 12.38" Max. BHP = 0.061 x (RPM / 1000)

3.62

Performance certified is for installation Type A; Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Performance based on a shaft height of 10" above the base on fan size 122.

Twin City Bulletin 470 11

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