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Plenum Fans
Models QEM and QEP
Belt and Direct Drive
September
2008
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Quiet & Efficient Plenum Fans Models QEM and QEP plenum fans are designed and engineered to provide superior performance and reliability in commercial or industrial applications. Our products are manufactured with state of the art laser, forming, spinning and welding equipment and endure our quality control testing to ensure trouble free start-up. Plenum fans are designed to handle a variety of commercial and industrial projects. They are designed for unhoused operation which results in a
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Performance Comparison 9 vs. 12-Blade Wheels Advantages of 12-Blade Wheels performance is adequate, recent industry trends have seen the emergence of 12-blade wheel designs where customers demand higher mechanical efficiency and lower sound levels. Model QEM and QEP plenum fans feature a 12-blade aluminum airfoil construction wheel. As demonstrated in Figure 1, this 12-blade design meets customer needs by providing higher efficiency, lower sound levels as well as lower energy consumption
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Standard Construction and Features QEM Arrangement 9 Motor on Right QEP Arrangement 3 4
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Standard Construction and Features 12-Blade Aluminum Airfoil Wheel QEM QEP 11 sizes 18 sizes Available Sizes 12–36 12–73 high efficiency and low sound 12-blade airfoil design. The aluminum wheel reduces start-up 200,000 cfm 3 3 torque requirements as well as shaft loading during 17 m 99 m 12 in. wg Maximum Pressure 1.6 kPa 3 kPa Performance Classes I, II (Partial) I, II, III blades to improve efficiency and reduce vibration. All Arrangements 4, 9 1, 3, 4 wheels are balanced to
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Optional Construction QEM Protective Cage Inlet Guard Belt Guard Protective Cage QEP Protective Cage Inlet Guard Shaft Guard Belt Guard Protective Cage Structural Isolation Base 6
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Optional Construction & Accessories Inlet Guard QEM QEP Assembled and mounted low-pressure loss, zinc L 1,000,000 hrs coated guards. 10 Optional Isolation Belt Guard Direct Mount Isolators Optional Optional Custom guarding with two tachometer holes and belt Optional tension inspection door, assembled and mounted. OSHA Compliant Guarding Protective Cage Guard, Inlet Optional Optional Optional Totally enclosed guard to protect personnel from Optional unhoused spinning wheel. Typically
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Arrangements QEP Arrangement 1 — Horizontal, Motor on Base Sizes 12—73 (shown with optional base & belt guard) QEP Arrangement 3 — Horizontal, Motor on Base Sizes 18—73 (shown with optional base & belt guard) QEP Arrangement 3 — Horizontal, Motor on Frame (Side) Sizes 12—73 QEP Arrangement 3 — Horizontal, Motor on Frame (Top) Sizes 12—73 QEP Arrangement 3 — Vertical, Motor on Frame Sizes 12—54 QEP Arrangement 4 — Horizontal, Direct Drive Sizes 15—60
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Arrangements QEM Arrangement 9 — Horizontal, Motor on Frame (Side) Sizes 12—36 QEM Arrangement 4 — Horizontal, Direct Drive Sizes 15—36 Available Motor on Frame Positions Left Top Right Available Motor on Base Positions Z W Y X 9
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System Considerations Air Plenum Design Guidelines Effects of Air Density To assure optimum performance and be able to use Ratings in the fan performance tables and curves of the system effect coefficients below, the following this catalog are based on standard air: clean and dry 3 guidelines should be adhered to in the plenum design: at 70°F at a pressure of 29.92 in. of mercury. A change in elevation, temperature 1. Flexible connections at the inlet are recommended to or the type o
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System Considerations 3. System effects for plenum discharges must also be Airstream Temperature Variations calculated and added to the design pressure. In a properly designed plenum (see Duct System Effect airstream should be considered: Start-up and normal section), the system effect coefficient (C ) depends o on the orientation of the discharge relative to the fan temperatures, the motor must be sized based the lowest and duct connection (if any). For air plenums wi
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Direct Drive Selections Direct drive construction offers many advantages for commercial or industrial air handling applications. - Reduced maintenance (no belts and shaft bearings to service) - Compact housing design requires a smaller footprint - Low vibration - Suitable for clean air application (no belt or bearing residue in airstream) Flow Control Options QEP Arrangement 4 width wheel to assist in matching actual fan performance to the desired Horizontal, Direct Drive assist in syste
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Direct Drive Selections 8 1770 RPM 6 (60 Hz) Static 4 Pressure Model QEM (in. wg) 2 Model QEP 15 16 18 20 22 24 27 30 33 0 1 5 10 50 100 8 1170 RPM 6 (60 Hz) Static 4 Pressure Model QEM (in. wg) 2 Model QEP 16 18 20 22 24 27 30 33 36 40 44 49 54 0 1 5 10 50 100 8 870 RPM 6 (60 Hz) Static Pressure 4 Model QEM (in. wg) 2 Model QEP 22 24 27 30 33 36 4 0 44 49 54 60 0 1 5 10 50 100 8 6 690 RPM Static (60 Hz) Pressure 4 (in. wg) Model QEP 2 27 30 33 36 40 44
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3510 3586 3900 2400 2991 1453 1905 1 ¾ ½ Plenum Size 12 Plenum Size 12 12 rpm QEP Class I Maximum rpm 2991 hp 5 % WOV QEP Class II Maximum rpm 3064 3 Density 0.075 lb/ft 25 10 3 Density 1.2 kg/m 60% QEM Maximum rpm Note: Model QEM does not utilize class designations. 20 8 2 70% 1½ 15 6 QEP Motor on Frame Limit 184T 80% Minimum Motor Size 1/3 [hp] 15.00 [in.] 10 4 Wheel Diameter 381 [mm] 3 90% (rpm / 2097) [hp] Peak Power 3 (rpm / 2312) [kW] 5 2 cfm / 1.12 [ft/min] Wheel Outlet Velocity 3 m /s
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4000 3606 3404 3064 3150 2611 1277 2109 1674 3 ½ 5 1 /3 15 10 1½ Plenum Size Plenum Size 15 Plenum Size 15 12 rpm QEP Class I Maximum rpm 2611 hp % WOV 3 Density 0.075 lb/ft QEP Class II Maximum rpm 3404 60% 3 Density 1.2 kg/m 25 10 QEP Class III Maximum rpm 4000 QEM Maximum rpm 3064 70% 20 8 Note: Model QEM does not utilize class designations. QEP Motor on Frame Limit 213T 15 6 80% Minimum Motor Size 1/3 [hp] 15.00 [in.] Wheel Diameter 10 4 381 [mm] 3 90% (rpm / 1842) [hp] Peak Power 3 (rpm /
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3900 3385 3095 2686 2786 2374 1979 1571 1247 1½ 1 20 3 5 10 15 Plenum Size 16 Plenum Size 16 14 rpm QEP Class I Maximum rpm 2374 hp % WOV 3 Density 0.075 lb/ft QEP Class II Maximum rpm 7½ 60% 30 3 12 Density 1.2 kg/m QEP Class III Maximum rpm 3900 25 10 QEM Maximum rpm 2786 70% Note: Model QEM does not utilize class designations. 20 8 80% QEP Motor on Frame Limit 215T 15 6 Minimum Motor Size 1/3 [hp] 2 16.50 [in.] Wheel Diameter 10 4 419 [mm] 90% 3 (rpm / 1571) [hp] Peak Power 3 ¾ (rpm / 1732)
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3735 3504 3184 2964 2668 2273 1862 1478 1½ 1 20 25 3 5 10 15 Plenum Size 18 Plenum Size Plenum Size 18 QEP Class I Maximum rpm 2273 35 14 rpm QEP Class II Maximum rpm 2964 hp % WOV 70% 3 Density 0.075 lb/ft QEP Class III Maximum rpm 30 12 3 Density 1.2 kg/m 7½ QEM Maximum rpm 2668 25 10 Note: Model QEM does not utilize class designations. 80% 20 8 QEP Motor on Frame Limit 215T Minimum Motor Size 1/3 [hp] 15 6 18.25 [in.] Wheel Diameter 90% 464 [mm] 10 4 3 2 (rpm / 1291) [hp] Peak Power 3 (r
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3175 3409 2948 2075 2706 2327 1566 1857 1243 1368 1086 1½ 1 20 25 30 40 3 5 10 15 Plenum Size 20 14 rpm QEP Class I Maximum rpm hp % WOV 3 Density 0.075 lb/ft 3 QEP Class II Maximum rpm 2706 30 12 Density 1.2 kg/m 70% QEP Class III Maximum rpm 3409 7½ 25 10 QEM Maximum rpm 2327 80% Note: Model QEM does not utilize class designations. 20 8 QEP Motor on Frame Limit 254T 15 6 Minimum Motor Size 1/3 [hp] 20.00 [in.] 90% 2 Wheel Diameter 10 4 508 [mm] 3 (rpm / 1086) [hp] Peak Power 3 5 2 (rpm / 11
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2190 3065 2433 2824 1865 1554 2658 1958 1311 1145 1041 909 3 20 1½ 40 10 Plenum Size 22 Plenum Size 14 rpm QEP Class I Maximum rpm hp % WOV 15 3 Density 0.075 lb/ft 35 QEP Class II Maximum rpm 2433 3 12 Density 1.2 kg/m 70% QEP Class III Maximum rpm 30 10 QEM Maximum rpm 2190 25 Note: Model QEM does not utilize class designations. 80% 8 QEP Motor on Frame Limit 254T 20 Minimum Motor Size 1/2 [hp] 6 15 22.25 [in.] Wheel Diameter 565 [mm] 90% 4 3 10 (rpm / 909) [hp] Peak Power 3 (rpm / 1002) [
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2480 1960 2178 2744 1670 1365 1005 20 30 25 3 5 50 60 15 Plenum Size 24 14 rpm QEP Class I Maximum rpm 1670 hp 60% % WOV 3 Density 0.075 lb/ft 30 QEP Class II Maximum rpm 2178 3 12 Density 1.2 kg/m QEP Class III Maximum rpm 2744 70% 25 10 QEM Maximum rpm 1960 Note: Model QEM does not utilize class designations. 20 10 8 80% QEP Motor on Frame Limit 256T 7½ 15 6 Minimum Motor Size 3/4 [hp] 24.50 [in.] Wheel Diameter 10 4 622 [mm] 90% 3 (rpm / 798) [hp] Peak Power 3 5 2 (rpm / 880) [kW] 2 cfm /
