E-SERIES PLUG TYPE PLENUM FANS

Transcription

1 Twin City an INDUSTRIAL PROCESS AND COMMERCIAL VENTILATION SYSTEMS E-SERIES PLUG TYPE PLENUM ANS EP EPN EPQ EPQN CATALOGUE M40 AUGUST 0

2 PLUG TYPE PLENUM ANS E-Series EP EPN EPQ EPQN Twin City an & Blower, the world s largest supplier of plug type plenum fans, now offers the completely redesigned E-Series, the first plug type plenum fan to be AMCA approed for sound and air in both Arrangement and configurations. The E-Series offers the flexibility of two plug type plenum fan designs, with each model offering its own unique performance characteristics. While eery E-Series fan is highly efficient and quiet, you can choose an E-Series design option that optimises the performance requirements most important to your application. Arr. EP Plenum an Benefits of a Plug Type Plenum an Saes Space There are no housings, transitions, or diffusers within the air handling unit. Efficiency Plug type plenum fans can be as efficient, or more efficient than scroll type fans at specific operating points towards the bottom of the fan cure. Lower cost Plug type plenum fans are less expensie than many scroll type fans. Compact Designs with Performance Assurance Space is often a key consideration in the selection of plug type plenum fans, making the compact Arrangement configuration ery popular. The Arrangement configuration is constructed with a bearing and bearing bar in the inlet, which will affect fan performance. These performance affects should be taken into account to ensure that your system functions as designed. Arr. EPQN Plenum an Twin City an & Blower certifies that the Model EP, EPN, EPQ & EPQN Plenum ans shown herein are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication and AMCA Publication and comply with the requirements of the AMCA Certified Ratings Program. Refer to Catalogue 4 for sound power leels. Plug type plenum fans are un-housed fans designed to operate inside of field-fabricated or factory-built air handling units. Application The fan impeller pressurizes the entire surrounding air plenum in which the fan is installed, allowing air ducts from any direction to be directly connected to the air handling unit enclosure. This design generally saes space by eliminating the fan housing, transitions, and diffusers within the air handling unit. Plug type plenum fans hae found a ready acceptance in the air conditioning industry. In addition, the construction ersatility, adaptability in the direction of the discharges, suitability for internal isolation and application of sound attenuators, and generally lower cost makes it a ery popular fan arrangement. TWIN CITY AN - CATALOGUE M40

3 PLUG TYPE PLENUM ANS 9-Bladed Impellers EP (Arr. ) The model EP features a highly efficient and cost effectie, nine-bladed aerofoil impeller design. The high efficiency of the EP will often allow the use of smaller fans without increasing power requirements. The EP is an Arrangement design. EPN (Arr. and 4) The model EPN features the same highly efficient, nine-bladed aerofoil impeller design as the EP, but is aailable in Arrangement or 4 designs without inlet obstructions. Sizes mm to 80 mm impeller diameters Performance Airflow from 0. to m /sec Static pressure to 00 Pa Drie Configurations Aailable in both direct and belt drie configurations. EP/EPN 9-Bladed Impeller Construction Class I, II, & III -Bladed Impellers EPQ (Arr. ) The Better Sound Quality model EPQ features a twelebladed aerofoil impeller design that flattens the sound spectrum and reduces the dominance of pure tones. The EPQ is an Arrangement design. EPQN (Arr. and 4) The model EPQN features the same Better Sound Quality, twele-bladed aerofoil impeller design as the EPQ, but is aailable in Arrangement or 4 without inlet obstructions. Sizes mm to 80 mm impeller diameters EPQ/EPQN -Bladed Impeller Performance Airflow from 0. to m /sec Static pressure to 000 Pa Drie Configurations Aailable in both direct and belt drie configurations. Construction Class I, II, & III Twin City an

4 EPQ/EPQN ADVANTAGE The EPQ/EPQN plug type plenum fans offer unique performance features that are beneficial for many sound sensitie and higher pressure applications. The EPQ/EPQN features a twele-bladed aerofoil impeller ersus the nine-bladed impeller of our type EP/ EPN plug type plenum fans or eight- to ten-bladed impellers with most other competition. The "Q" in the EPQ/EPQN designation stands for Better Noise Quality. Noise quality is a subjectie description for noise that is less objectionable. Arr. EPQ with Enclosure Looking at the sound comparison, you will notice that the type EPQ/EPQN offers noise (SPL) that is more equally distributed across all frequencies. This can be more pleasant to hear than the sound characteristics of a nine-bladed design. ans are often dominated in noise by the noise occurring at the blade pass frequency. (Blade pass frequency = RPM x Number of blades/.) Noise quality is improed by reducing the difference in amplitude between the blade pass amplitudes and the neighbouring frequency amplitudes. The increased higher frequency sound power leels on the twele-bladed impellers mask the blade pass frequency offering a better sound quality. Although the oerall A-weighted sound power leels of the nine-bladed EP/ EPN fans are slightly lower, the sound "quality" of the twele-bladed EPQ/EPQN fans may be desirable for the application. A higher blade pass frequency allows for easier attenuation of the noise, especially when installed inside an air handling unit. In many applications, the use of the EPQ/EPQN design will moe the blade pass frequency from the Hz octae to the 0 Hz band. Acoustic silencers will normally perform about 0 db better in the 0 Hz band. Arr. EPQN Plenum an In addition to sound considerations, there are also additional benefits to using the EPQ/EPQN at higher pressures. Selections oer 000 Pa static pressure are often near the peak pressure of the fan. The additional blades gie a higher peak pressure and also add stability to the fan. Twele smaller passages through the fan impeller 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 elocities that accompany these selections. TYPE M /sec Pa RPM BkW REQUENCY, HZ LwA EPQN Blades EPN 9 Blades NOTE: Circled figures indicate blade pass frequency. 4 TWIN CITY AN - CATALOGUE M40

5 CONSTRUCTION EATURES Impellers High efficiency, non-oerloading aerofoil impellers are proided on all sizes and arrangements. Arr. and Aluminium impellers using extruded aluminium blades are standard to size 4 on arrangement and fans, and aailable as an option on larger sizes. Steel impellers are standard on sizes 0 and larger. Arr. 4 Aluminium impellers using extruded aluminium blades are standard to size on direct drie arrangement 4 fans, a popular choice for applications requiring precision balance and improed reliability. Inlet Cones Heay-gauge spun steel inlet cones are closely matched to the impeller intake rim to ensure efficient and quiet operation. Structural rame rames are constructed of heay-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. Arr. 4 EPN Plenum an Shafts Shafts are AISI Grade 040 or 04 hot-rolled steel accurately turned, ground, polished, and ring-gauged for erification. Shafts are generously sized for a first critical speed of at least.4 times the maximum speed for the class. an Bearings Bearings are heay duty, grease lubricated, spherical roller or adapter mounted anti-friction ball, self-aligning, pillow block type, selected for minimum aerage bearing life L0 in excess of 40,000 hours at the maximum fan RPM. Considering the long life offered with our standard bearing selections, we do not recommend upgrades to split-roller bearings due to their large size, especially on Arrangement 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. Arr. 4 EPN Plenum an Twin City an

6 LOW MEASUREMENT SYSTEM Piezometer Ring Mounted at Throat of Inlet Cone HIGH PRESSURE SIDE LOW PRESSURE SIDE STATIC PRESSURE TAP PIEZOMETER RING Piezometer Ring (Airflow Measuring System) A piezometer ring is aailable on plug type plenum fans, as well as other Twin City an 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 calculated by measuring the pressure drop through the inlet cone. No tubes or sensors are inserted in the high elocity airstream which could obstruct airflow. The system consists of a piezometer ring mounted at the throat and a static pressure tapping mounted on the face of the inlet cone. A differential pressure transducer and digital display can also be proided. The pressure drop is measured from the tapping located on the face of the inlet cone to the piezometer ring in the throat. The inlet tapping 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 an laboratory tests, the system was determined to be accurate within +/-%. Refer to Twin City an Engineering Supplement ES-0. NOTE: Twin City an does not recommend placement of flow measuring probes inside the fan inlet cone in the path of airflow. These deices create disturbances and unpredictable performance losses. Twin City an will not be responsible for loss of performance due to such deices. AERO ACOUSTIC DIUSER TM (U.S. PATENT 4) Aero Acoustic Diffuser mounted on Arr. 4 EPQN The new Aero Acoustic Diffuser is exclusiely aailable on the Twin City an E-Series plug type plenum fans. The patented design allows the plug type plenum fan to discharge sound power reductions by up to dba while increasing aerodynamic static efficiency by up to 4%. The Aero Acoustic Diffuser features a fully galanised construction that mount at the front and back of the fan impeller. The acoustic material is inserted within a solid housing and a perforated front plate that directs airflow across the diffuser reducing fan noise and increasing static efficiency. Mounting brackets constructed of galanised steel mount directly to the framework allowing for mounting within the existing fan framework. The Aero Acoustic Diffuser is aailable on all E-Series plug type plenum fan sizes, both direct drie and belt drie. The diffuser is aailable on fans direct from the factory or as a retrofit kit to existing fans. SECTION A-A ASSEMBLY 6 TWIN CITY AN - CATALOGUE M40

7 ACCESSORIES Variable Inlet Vanes Variable inlet anes proide economical, stable, and efficient air olume 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 ane bearing housings are welded in position and stiffened with a welded support ring. The welded structure eliminates flutter and ibration while utilizing a cantileered design to minimize insertion loss. NOTE: Inlet anes are not recommended on fans smaller than size 00 due to noise and loss in performance. Inlet Collar The standard, square-panel design proides the means for flexible connection on all arrangements without an inlet collar. NOTE: On belt drien units, a belt guard should be used for full protection. Optional Belt Guard & Protectie Enclosure Belt Guard Proides protection to personnel from the moing drie parts. Both standard and OSHA compliant totally enclosed types are aailable. Protectie Enclosure Grill style protectie enclosure completely encloses all sides and the back of the fan impeller. Side panels are indiidually remoable to proide access to the impeller. Inlet Screen Heay-gauge inlet screen that nests in the inlet funnel for personnel protection on non-ducted inlets. Inlet Screen Inlet Collar ARRANGEMENTS Arrangement (EPN and EPQN) Arrangement features an oerhung impeller design suitable for V-belt drie and requires mounting of motor independent of the fan. Class I and II aailable in sizes to 890. See dimensional drawing on page 9. Class III aailable in sizes 8 to 890. Contact factory for dimensional drawing. Arrangement (Horizontal - EP and EPQ) This is the most common plug type plenum fan arrangement for use in OEM and site-built air handling units. Arrangement is suitable for V-belt drie and requires mounting of the motor independently of the fan. Twin City an & Blower offers common unitary bases and isolation bases for the fan and motor as accessories. Class I and II aailable in sizes to 890. Class III aailable in sizes 8 to 890. See dimensional drawing on page 94.

8 ARRANGEMENTS Arr. HA Arrangements HA (Horizontal with Top Mounted Motor) Arrangement HA proides a means for mounting the motor on top of the unit. This design is often desirable when floor space is limited. Aailable with a heay duty Twin City an & Blower designed adjustable motor base for all fan sizes. Models EP and EPQ. Arrangement HA with piot motor base is aailable in Class I and II for sizes to 4. See dimensional drawing on page Arrangement SM (Horizontal With Side Mounted Motor) Arrangement SM is designed to proide an economical and space-saing means to supply plug type plenum fans with motors mounted to the side of the fan frame. A motor slide base allows for quick and easy belt adjustments. Models EP and EPQ. Class I and II aailable in sizes 6 to. Motor limited to maximum frame size shown on drawing. See dimensional drawing on page 9. Arr. VA Shown with optional inlet collar Arrangements VA (Vertical with Side Mounted Motor) Vertical Arrangement is aailable with a heay duty Twin City an & Blower designed adjustable motor base for all fan sizes. Models EP and EPQ. Arrangement VA with piot motor base is aailable in Class I and II for sizes to 4. See dimensional drawing on page Unless specified otherwise, units will be built for ertical up airflow. 8 TWIN CITY AN - CATALOGUE M40

9 ARRANGEMENTS Arrangement 4 (Horizontal) Direct drie Arrangement 4 mounts the fan impeller directly onto the motor shaft. This arrangement proides a compact fan/motor unit which eliminates belt residue and requires less maintenance than other arrangements. It also negates any drie loss so proides an energy efficient solution. or these reasons, Arrangement 4 plug type plenum fans are widely used in cleanroom, pharmaceutical, and other critical applications. ans can be selected with arying impeller widths to proide desired performance at direct drie motor speeds. Performance changes in the field are usually achieed by means of ariable inlet anes or VD. Models EPN and EPQN. Aluminium impellers using extruded aluminium blades are standard. Class I and II aailable in sizes to 6. See dimensional drawing on pages Class III aailable in sizes 8 to 6. See dimensional drawing on pages 0-0. Arrangement 4 (Vertical) Vertical Arrangement 4 is aailable for mounting with either ertical up airflow (inlet under the motor) or ertical down airflow (inlet aboe the motor). Models EPN and EPQN. Aluminium impellers using extruded aluminium blades are standard. Class I and II aailable in sizes 8 to 490. Inlet flange aailable. See dimensional drawing on page 04. Vertical Up Airflow OPTIONAL INLET COLLAR OPTIONAL INLET COLLAR Twin City an Vertical Down Airflow 9

10 DUCT ENTRANCE LOSSES To achiee the air elocity in the discharge duct and oercome 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 locations will require arying 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 AN ESP DISCHARGE TYPE CORRECTION ACTOR Radial and ducted with bellmouth. x Duct Velocity Pressure Radial and ducted without bellmouth.4 x Duct Velocity Pressure Radial without duct or bellmouth.8 x Duct Velocity Pressure low parallel to shaft and ducted.6 x Duct Velocity Pressure with bellmouth low parallel to shaft and ducted.9 x Duct Velocity Pressure without bellmouth low parallel to shaft without duct.4 x Duct Velocity Pressure or bellmouth low Parallel To an Shaft hout mouth Bellmouth Radial Discharge Without Duct or Bellmouth Radial Discharge Example: A system requires 4. m /sec at 0 Pa static pressure at standard air density with one 0 mm diameter duct with bell-mouth placed in a radial discharge. Determine RPM and absorbed power: Duct area = (. x Π) 4 =. m Duct elocity = 4.. = m/s Duct elocity pressure = 0. x ρ x = 0.6 x = std. cond. APPLICATION Entrance loss correction factor =. x duct elocity pressure =. x = 88 Pa Thus, select the fan for = = 8 Pa static pressure an Selection Recommendations. System effect losses (see AMCA 0) and plenum losses should be estimated and added to the required static pressure, prior to making selections. Refer to AMCA Publication 0 at and Twin City an Engineering Data Letter an Performance Troubleshooting Guide (E-00) at ans should be selected so that the point of operation is approximately between % and 90% of the free deliery point on the fan cure.. Aoid selections oer 0 RPM. A narrow width, larger size impeller can be used to aoid this. 4. Arrangements and 4 will offer the best efficiency and lowest noise as there are no inlet obstructions.. Where space is aailable, mount the fan and motor on a sub-base. The motor can be mounted on the fan on Arrangements HS, HA, SM, VS, and VA. 6. Use inertia-type isolation bases or rigid mounting for lowest fan ibration. Rigid mounting requires dynamic analysis (by others) of the support structure to aoid resonance.. Applications exceeding 00 Pa static pressure are prone to high system effect losses. Use of housed fans (BAE-DWDI) should be considered. 8. Where static pressures oer 000 Pa are required, Model EPQ or EPQN are preferred because of lower operating speeds and improed stability. Select the fan so the design pressure is at least 0% below the peak pressure. 9. Where flow monitoring is required, use a piezometer ring or externally mounted flow measurement station. an performance may be substantially affected by flow measurement probes mounted directly in the fan inlet cone. Refer to page or direct drie fans without speed control (or where speed control cannot exceed 0 Hz), select fans at % below the nominal speed of the motor. This will normally coer the uncertainties associated with the system and air balance measurements. Select motors loaded no closer than 90% of the maximum loading of the motor.. or multiple fans in a plenum, alternate CW and CCW rotation fans to minimise losses. If fans are not counterrotating, install walls between each fan to create cells in the outlet plenum.. Add losses for duct take-offs per the chart aboe to pressure requirements of the fan. Bellmouth entries will always reduce losses and are recommended.. or highest reliability, specify the required bearing life. or example, the statement minimum L0 bearing life = 40,000 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: a. On smaller fans, there may not be enough radial load to preent roller skidding. This is especially a problem for Arrangement fans. b. Split roller bearings are not offered in sizes smaller than 6 mm bore. Smaller fans use shafts smaller than this. c. The oersized bearing in the inlet will block some air in smaller fans (aboe the losses that are already included in the EP/EPQ ratings). 0 TWIN CITY AN - CATALOGUE M40

11 APPLICATION Location and Placement of ans in Air Handlers. Centre the fan inlets in both the horizontal and ertical planes.. or inlet clearance, see igure. The flow should conerge at an angle not greater than 4 when approaching the opening for the fan inlet. A minimum of one fan impeller diameter clearance is recommended.. In the fan outlet plenum, a minimum wall clearance of one-half fan impeller diameter to the periphery of the fan impeller is recommended. 4. igure shows that the minimum clearance between the back of the fan impeller and the nearest component downstream (Dim. E) should be one impeller diameter. Small clearances do not allow the flow to equalize behind the fan impeller and the pressure drop of the downstream component is increased.. When the flow enters the inlet plenum perpendicular to the fan shaft, large system effect losses can occur. See igure for a recommended flow baffle or a ortex breaker that may help presere rated fan performance. 6. When two or more fans are installed in a plenum, diide the plenum into imaginary cells of equal area. Centre the fan inlets on each cell. See igure. igure. Recommended Location of an in Plenum Installation Recommendations. Install the fan so the flexible connector on the inlet remains un-collapsed during operation.. Install thrust restraints (snubbers) to maintain the axial position of the fan when it is generating pressure.. Peripheral equipment, such as electrical components, inerters, control panels, etc., should be positioned away from the high elocity air entering or leaing the fan. 4. Adjust springs on the isolation base so that spring deflection is approximately equal for all isolators.. ollow safety, installation, start-up, and maintenance instructions supplied with each fan. igure. low Baffle and Vortex Spin Breaker Location TAKE-OS PAST PLANE O AN IMPELLER BALE C D/ MINIMUM RECOMMENDED A/ O 4 MAX A C L D AIRLOW INLET SPIN BREAKER ACCESSORY D B (A-D)/, BUT NOT LESS THAN 'D' E ('E' MINIMUM = 'D') D/ igure. Location of Counter-Rotating ans TWO ANS THREE ANS H D D D D D H H / H / 'H' MINIMUM = D W / 4 W / 4 'H' MINIMUM = D W / 6 W / 6 W 'W' MINIMUM = 4D W / W 'W' MINIMUM = 6D NOTE: D = Impeller diameter

12 ENGINEERING DATA Maximum RPM, Impeller Weights, & WR EP and EPN EP EPN IMPELLER DIA (mm) MAX. RPM (0 o C) CLASS I CLASS II CLASS III ALUMINIUM STEEL MAX. WT. (kg) WR (kg-m ) WT. (kg) WR (kg-m ) RPM (0 o C) ALUMINIUM STEEL MAX. WT. (kg) WR (kg-m ) WT. (kg) WR (kg-m ) RPM (0 o C) ALUMINIUM WT. (kg) WR (kg-m ) N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 00 6 WT. (kg) STEEL WR (kg-m ) Maximum RPM, Impeller Weights, & WR EPQ and EPQN EPQ EPQN IMPELLER DIA (mm) MAX. RPM (0 o C) *Consult factory for fans oer 0 RPM. CLASS I CLASS II CLASS III ALUMINIUM STEEL MAX. WT. (kg) WR (kg-m ) WT. (kg) WR (kg-m ) RPM (0 o C) ALUMINIUM STEEL MAX. WT. (kg) WR (kg-m ) WT. (kg) WR (kg-m ) RPM (0 o C) ALUMINIUM WT. (kg) WR (kg-m ) N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 8..0 N/A N/A N/A N/A N/A N/A N/A N/A 6 86 WT. (kg) STEEL WR (kg-m ) Contact factory for belt drien fans aboe 0 kw. Bare an Weights SIZE IMPELLER DIA (mm) ARR. (EPQN) ARR. (EPQ) ARR. 4 (EPQN) CL I CL II CL III CL I CL II CL III CL I CL II CL III N/A.9.9 N/A.. N/A 0.. N/A N/A N/A N/A.8. N/A N/A N/A N/A N/A NOTES:. Arrangement and weights include an aluminium impeller on size through 4, and a steel impeller on size 0 through 0.. Arrangement 4 weights include an aluminium impeller on all sizes.. Weights are for the -bladed impeller design (EPQ and EPQN). 9-bladed designs (EP and EPN) are slightly less and can be reduced by the difference between the impeller weights shown aboe. 4. Weights do not include motor, drie, motor base, or slide base. TWIN CITY AN - CATALOGUE M40

13 ,000 EPN 00 RPM 80 RPM 0 00 RPM 8 LwA kw 0. P - an Total Pressure (Pa) RPM 000 RPM 0 LwA LwA LwA.kW 0.kW 0.kW 0.kW 0. 6 LwA 0.kW 0. 9 RPM 00 6% Eff. 66% Pk. Eff. LwA LwA 0.8kW low (m³ /sec) % Eff an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0.

14 ,000 EP 00 RPM 80 RPM 0 00 RPM 8 LwA kw P - an Total Pressure (Pa) RPM 000 RPM 6 LwA 0 LwA LwA LwA.kW 0.kW 0.kW 0.kW 0.kW 9 RPM 00 LwA 0.8kW 0. LwA 6% Pk. Eff % Eff low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. 4 TWIN CITY AN - CATALOGUE M40

15 ,000 EPQN 00 RPM 80 RPM 0 00 RPM 8 LwA 0. P - an Total Pressure (Pa) RPM 000 RPM 6 LwA 0 LwA LwA LwA kw.kw 0.kW 0.kW 0.kW 0.kW 0. 9 RPM 0.8kW % Pk. Eff. LwA 0. 4% Eff low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0.

16 ,000 EPQ 00 RPM 80 RPM 0 00 RPM 8 LwA 0. P - an Total Pressure (Pa) RPM 000 RPM 6 LwA 0 LwA LwA LwA kw.kw 0.kW 0.kW 0.kW 0. 9 RPM 0.kW % Pk. Eff. LwA 0.8kW low (m³ /sec) 48% Eff an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. 6 TWIN CITY AN - CATALOGUE M40

17 ,000 EPN 0 00 RPM 80 RPM kw 00 RPM 0 8 LwA 000 RPM P - an Total Pressure (Pa) RPM 6% Eff. 40 RPM 66% Pk. Eff. LwA 6 LwA 0 LwA LwA LwA 0.kW 0.kW 0.kW 0.kW 0.8kW.kW kw.kw 0. % Eff q - low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0.

18 ,000 EP 0 00 RPM 80 RPM 00 RPM kw RPM 8 LwA P - an Total Pressure (Pa) 00 9 RPM 40 RPM 6 LwA 0 LwA LwA LwA.kW kw.kw 0.kW 0.kW 0.kW 0.kW % Pk. Eff. 0.8kW 0. % Eff q - low (m³ /sec) an Efficiency Grade = EG 6 q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. 8 TWIN CITY AN - CATALOGUE M40

19 EPQN 0 0, RPM 80 RPM 00 RPM P - an Total Pressure (Pa) RPM 000 RPM 0 LwA LwA LwA 8 LwA kw.kw kw.kw 0.kW 0.kW 0. 9 RPM 6 LwA 0.kW % Pk. Eff. LwA 0.8kW 0.kW 0. 4% Eff q - low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard

20 ,000 EPQ 0 00 RPM 80 RPM 00 RPM 0 8 LwA kw 000 RPM 0. P - an Total Pressure (Pa) 00 9 RPM 40 RPM 6 LwA 0 LwA LwA LwA kw.kw 0.kW 0.kW.kW % Pk. Eff. LwA 0.kW 0.kW kW 0. 48% Eff q - low (m³ /sec) an Efficiency Grade = EG 6 q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. 0 TWIN CITY AN - CATALOGUE M40

21 ,000 EPN 6 80 RPM 00 RPM kw RPM P - an Total Pressure (Pa) 00 9 RPM 40 RPM 6 LwA 0 LwA LwA LwA 8 LwA kw.kw 0.kW 0.kW 0.kW.kW 0 00 RPM LwA 0.kW 0. 6% Eff. 66% Pk. Eff. LwA 0.8kW % Eff q - low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0.

22 ,000 EP 6 80 RPM 00 RPM kw RPM 8 LwA P - an Total Pressure (Pa) 00 9 RPM 40 RPM 6 LwA 0 LwA LwA LwA.kW kw.kw 0.kW 0.kW 0.kW 0 00 RPM LwA 0.kW % Pk. Eff. 0.8kW 40 % Eff q - low (m³ /sec) an Efficiency Grade = EG 6 q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. TWIN CITY AN - CATALOGUE M40

23 ,000 EPQN 6 80 RPM 00 RPM RPM 8 LwA kw 0. P - an Total Pressure (Pa) 00 9 RPM 40 RPM 0 LwA LwA LwA.kW kw.kw 0.kW 0.kW 6 LwA 0. 0.kW 0 RPM 00 0.kW 0. 6% Pk. Eff. LwA 0.8kW % Eff. q - low (m³ /sec) an Efficiency Grade = EG 6 q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0.

24 ,000 EPQ 6 80 RPM 00 RPM RPM kw 8 LwA P - an Total Pressure (Pa) 00 9 RPM 40 RPM 6 LwA 0 LwA LwA LwA.kW kw.kw 0.kW 0.kW 0 RPM 00 LwA 0.kW 0. % Pk. Eff. 0.8kW 0.kW % Eff q - low (m³ /sec) an Efficiency Grade = EG 6 q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. 4 TWIN CITY AN - CATALOGUE M40

25 4,000 EPN 8 00 RPM 0, RPM 00 RPM 00 LwA 000 RPM 9 LwA kw P - an Total Pressure (Pa) 0 9 RPM 40 RPM kw.kw kw.kw.kw.kw 00 0 LwA LwA 8 LwA LwA 0. 0.kW RPM 00 % Pk. Eff. 6 LwA 0.kW 0.kW 0.8kW 0.kW 6% Eff low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0.

26 4,000 EP 8 00 RPM 0, RPM 00 LwA 00 RPM 9 LwA 000 RPM kw P - an Total Pressure (Pa) 0 9 RPM 40 RPM LwA LwA 8 LwA.kW.kW kw.kw kw.kw LwA 0.kW 0 RPM 0.kW % Eff. % Pk. Eff. 6 LwA 6% Eff. 0.kW 0.kW 0.8kW low (m³ /sec) an Efficiency Grade = EG 0 - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. 6 TWIN CITY AN - CATALOGUE M40

27 4,000 EPQN 8 00 RPM 0 80 RPM, RPM 9 LwA 000 RPM kw P - an Total Pressure (Pa) 0 9 RPM 40 RPM LwA LwA 8 LwA kw.kw kw.kw.kw.kw LwA 0.kW 0 RPM 6 LwA 0.kW % Pk. Eff. LwA 0.8kW 0.kW 0.kW 6% Eff low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0.

28 4,000 EPQ 8 00 RPM 0 80 RPM, RPM 9 LwA 00 LwA 000 RPM kw P - an Total Pressure (Pa) RPM 40 RPM 0 LwA LwA LwA 8 LwA.kW.kW kw.kw kw.kw 0. 0.kW 0. 0 RPM 00 69% Pk. Eff. LwA 6 LwA 0.kW 0.kW 0. 0.kW 8% Eff. 0.8kW low (m³ /sec) an Efficiency Grade = EG 0 - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. 8 TWIN CITY AN - CATALOGUE M40

29 EPN RPM, RPM 000 RPM 00 LwA kw 9 LwA P - an Total Pressure (Pa) 0 9 RPM 40 RPM LwA 8 LwA kw.kw kw.kw.kw 00 LwA.kW 0. 0 RPM 0 LwA 0.kW % Pk. Eff. 6 LwA 0.kW 0.kW % Eff. 0.kW 0.8kW low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard

30 EP RPM, RPM 00 LwA 000 RPM 9 LwA kw P - an Total Pressure (Pa) 0 9 RPM 40 RPM LwA LwA 8 LwA kw.kw kw.kw.kw 00.kW RPM 00 68% Eff. % Pk. Eff. 6 LwA 0 LwA 0.kW 0.kW 0.kW 0. 6% Eff. 0.kW low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. 0 TWIN CITY AN - CATALOGUE M40

31 0 EPQN RPM, RPM 9 LwA 000 RPM kw P - an Total Pressure (Pa) 0 9 RPM 40 RPM LwA LwA 8 LwA kw.kw kw.kw.kw 00 0 LwA.kW 0. 0 RPM 0.kW 6 LwA % Pk. Eff. 0.kW 0.kW % Eff. 0.kW 0.8kW low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0.

32 0 EPQ RPM, RPM 9 LwA 000 RPM kw P - an Total Pressure (Pa) 0 9 RPM 40 RPM LwA LwA 8 LwA kw.kw kw.kw.kw RPM 0 LwA.kW 0. 69% Pk. Eff. 6 LwA 0.kW 0.kW 00 0.kW % Eff. 0.kW low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. TWIN CITY AN - CATALOGUE M40

33 4,000 EPN 80 RPM 0 00 RPM, RPM 9 LwA 00 LwA 8.kW kw 0. P - an Total Pressure (Pa) RPM 9 RPM 40 RPM 0 LwA LwA LwA 8 LwA kw.kw kw.kw kw.kw.kw RPM % Pk. Eff. LwA LwA 6 LwA 0.kW 0.kW 0.kW 0.8kW 0.kW low (m³ /sec) 69% Eff an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0.

34 4,000 EP 80 RPM 0 00 RPM 0 LwA, RPM 00 LwA 8.kW 9 LwA 0. P - an Total Pressure (Pa) RPM 9 RPM 40 RPM 0 LwA LwA LwA 8 LwA.kW.kW kw.kw kw.kw kw kw 0. 6 LwA 0.kW 00 RPM 00 0.kW 0. % Pk. Eff. LwA 0.kW 0.kW kW low (m³ /sec) 6% Eff an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. 4 TWIN CITY AN - CATALOGUE M40

35 4,000 EPQN 80 RPM 0 00 RPM, RPM 9 LwA 8.kW 0. P - an Total Pressure (Pa) RPM 9 RPM 40 RPM 0 LwA LwA LwA 8 LwA kw.kw kw.kw kw kw.kw.kw RPM % Pk. Eff. 6 LwA LwA 64% Eff. 0.kW 0.kW 0.kW 0.kW 0.8kW low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0.

36 4,000 EPQ 80 RPM 0 00 RPM 00 LwA, RPM 9 LwA 8.kW 40 RPM kw P - an Total Pressure (Pa) RPM 9 RPM LwA LwA 8 LwA.kW.kW kw.kw kw kw 0. 0 LwA.kW RPM 00 % Pk. Eff. LwA 6 LwA 0.kW 0.kW 0.kW 0.kW kW low (m³ /sec) % Eff an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. 6 TWIN CITY AN - CATALOGUE M40

37 4,000 EPN 4 00 RPM 0, RPM 00 LwA 9 LwA 8.kW 40 RPM kw P - an Total Pressure (Pa) RPM 9 RPM 0 LwA LwA LwA 8 LwA kw.kw.kw kw.kw kw 0..kW 6 LwA RPM 00 6% Eff. 9% Pk. Eff. LwA 0.kW 0.kW 0.kW 0. 0% Eff. 0.8kW 0.kW low (m³ /sec) an Efficiency Grade = EG 8 q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0.

38 4,000 EP 4 00 RPM 0, RPM 00 LwA 0 LwA 40 RPM 9 LwA 8.kW 0. P - an Total Pressure (Pa) RPM 9 RPM 0 LwA LwA LwA 8 LwA kw.kw kw.kw kw kw.kw.kw RPM 00 4% Pk. Eff. LwA 6 LwA 0.kW 0.kW 0.kW 0. 64% Eff. 0.kW 0.8kW low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. 8 TWIN CITY AN - CATALOGUE M40

39 4,000 EPQN 4 00 RPM 0, RPM 9 LwA kw 40 RPM 8.kW kw P - an Total Pressure (Pa) RPM 9 RPM LwA LwA 8 LwA kw.kw kw kw.kw.kw 0. 0 LwA.kW RPM 6 LwA 0.kW % Pk. Eff. LwA 0.kW 0.kW 0. 6% Eff. 0.kW 0.8kW low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard

40 4,000 EPQ 4 00 RPM 0, RPM 00 LwA kw 9 LwA 40 RPM 8.kW 0. P - an Total Pressure (Pa) RPM 9 RPM 0 LwA LwA LwA 8 LwA kw.kw kw kw kw.kw.kw.kw RPM 6 LwA 0.kW % Pk. Eff. LwA 0.kW 0.kW 0. 6% Eff. 0.kW 0.8kW low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard TWIN CITY AN - CATALOGUE M40

41 4,000 EPN 0 00 RPM RPM 0 LwA, LwA 0kW 40 RPM 9 LwA kw 8.kW P - an Total Pressure (Pa) 0 9 RPM 0 RPM 8 LwA LwA LwA.kW.kW kw.kw kw kw 00 0 LwA 0. kw RPM % Eff. 8% Pk. Eff. 6 LwA LwA.kW 0.kW 0.kW 0. 0% Eff. 0.kW 0.kW low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard

42 4,000 EP 0 00 RPM RPM 0 LwA, LwA 0kW 40 RPM P - an Total Pressure (Pa) RPM 00 9 RPM 0 RPM % Eff. 0 LwA 6 LwA LwA % Pk. Eff. LwA 8 LwA LwA 9 LwA kw.kw kw.kw 0.kW 0.kW kw 8.kW kw kw.kw.kw 0. 6% Eff. 0.kW low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard 0. 4 TWIN CITY AN - CATALOGUE M40

43 4,000 EPQN 0 00 RPM RPM 00 LwA,000 9 LwA 0kW 40 RPM kw 8.kW P - an Total Pressure (Pa) RPM 0 RPM LwA 0 LwA LwA 8 LwA.kW.kW kw.kw kw kw RPM 6 LwA kw % Pk. Eff. LwA 66% Eff..kW 0.kW 0.kW 0.kW 0.kW low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard

44 4,000 EPQ 0 00 RPM kw RPM, LwA 9 LwA 0kW 40 RPM kw P - an Total Pressure (Pa) 0 9 RPM 0 RPM LwA LwA 8 LwA kw kw.kw.kw kw 8.kW 00 0 LwA.kW RPM kw % Pk. Eff. LwA 6 LwA.kW 0.kW 0. 0.kW 6% Eff. 0.kW low (m³ /sec) an Efficiency Grade = EG q - low (CM) (in Thousands). Power rating (kw) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power leel ratings shown are in decibels, referred to 0 E- watts calculated per AMCA Standard 0.. Values shown are for inlet LwiA sound power leels for Installation Type A: ree inlet, ree outlet.. The A-weighted sound ratings shown hae been calculated per AMCA Standard TWIN CITY AN - CATALOGUE M40