BLENDER SECTIONSERIES IV
®
High Performance Mixing Systems for New and Retrofit Applications
© 1999 Blender Products, Inc.S-IV 12/99
Engineered Air Mixing Systems and Equipment
5010 Cook Street • Denver, Colorado 80216Phone: 303.295.6111 • Fax: 303.296.1520Toll-free: 800-523-5705E-mail: [email protected]: www.airblender.com
BENEFITS:• Requires minimal space• Uses minimal energy• Provides high levels
of mixing• Allows large
turndown ratios
The Series IV Air Blender® mixer provides the greatest amount ofmixing at the most predictable levels of any static mixing device onthe market. It is engineered to eliminate air stratification and therebyprevent freeze-stat trips and frozen coils, reduce sensor errors,and improve outside air dilution to help meet IAQ requirements.
However, one of the most common problem that designers,owners, and installers encounter when trying to apply a mixingdevice is the additional space that these devices require to operateeffectively. In response to this problem, Blender Products, Inc.has developed the Series IV Blender Section. This patented unit combines the highly efficient Series IV Air Blender mixer with specially designed transitions to ensure high levels of mixing in
the shortest distance and with lower pressure drops than conven-tionally mounted mixers.
In addition to the reduced mixing distance and lower pressuredrop, the Series IV Blender Section provides mixing effectivenesslevels of 65% or higher across the entire range of sizes and models.This level of mixing ensures that systems operating at 30% outsideair will not trip a freeze-stat set at 35° F if outside air temperaturesremain above 0° F.
By specifying the Series IV Blender Section, designers, owners,and installers alike can be assured that the space, energy, andmixing effectiveness of a system will be predictable and reliable.
Blender Section Selection and Specification Procedure
Correct Incorrect
Multiple Blender Section Single Blender Section
Selecting and specifying the correct Blender Section for an air handling unit consists of 5 steps.This procedure results in an efficientmixing system for each air-handling unit with predictable performance.
Step 1. Determine how the outdoor and return air streams will enter the mixing box.The arrangement of the return and outdoor air streams determines if multiple mixers can be used. In order to function properly, the sameamount of return and outdoor air must pass through each mixer.This condition is usually satisfied whenever the inlets extend the fullwidth of the mixing box and does not approach the air-handling unit from the side.
If the inlet condition will allow muliple mixers to be used, continue the selection procedure using this selection guide. If this condition isnot satisfied, consult your local rep or the factory for the proper selection of the Single Blender Section.
Step 3. Determine which Blender Section type is desired (Standard, Low Pressure Drop, or Single Wall) and the resulting distance.Once the size of the Blender Section has been determined, the type of Blender Section needs to be selected. In general, the StandardBlender Section packages the greatest amount of benefits. However, for applications with special needs the Low Pressure Drop andSingle Wall models can be used. Next to the diagram of each model number are the primary features of each model type. At the bottom ofthe page is a table that gives the length of each type of Blender Section. All three options provide the same level of mixing effectiveness.
Standard Blender Section
• Provides shortest distance• Double Wall construction• P.D. – 0.20-0.30” w.g• VAV Turndown – 30%
Low DP Blender Section
• Provides medium distance• Double Wall construction• P.D. – 0.10-0.15” w.g• VAV Turndown – 40%
Single Wall Blender Section
• Longer distance• Single Wall construction• P.D. – 0.15-0.20” w.g.• VAV Turndown – 40%
Step 2.Determine the size of the air-handling unit that will be used.Determine the coil area required or the estimated air handling unitsize that will be used for an application. Use the interface guide to the right to determine which size Blender Section is required for the application. If a particular air handling unit is not listed,determine the coil area in the air-handling unit and round up to the nearest listed size.
Example:A Trane MCC21 requires a S21 Blender Section. A custom air-handling unit with a coil area of 19 ft2 also requires a S21Blender Section.
Blender Section Length (Inches) for Different Options
Model Standard Low PD Single WallLength Length Length
S4 14 16 20
S6 14 16 20
S8 16 18 20
S10 16 18 20
S12 18 20 24
S14 18 22 24
S17 20 24 30
S21 22 26 30
S25 24 28 30
Model Carrier McQuay Trane York 39T Vision MCC AP
SM4 3/4 3 35
SM6 6 6 60
SM8 7 8 8 80
SM10 9/11 10 10 105
SM12 12 12 120
SM14 13 14 14 150
SM17 17 17 17 170
SM21 21 21 21 215
SM25 26 25 25 250
SM30 32 30 30 305
SM35 35 35 360
SM40 39 40 40 400
SM50 49 50 50 500
SM60 61 580
SM65 65 66 660
SM80 74 80 80 800
SM90 92
SM100 100 100 1000
Model Standard Low PD Single WallLength Length Length
S30 26 28 32
S35 26 28 32
S40 28 30 34
S50 32 36 40
S60 40 42 48
S65 44 48 54
S80 46 52 60
S90 48 54 60
S100 56 60 68
Coil Velocity Standard Low Pressure Single Wall (FPM) (inches w.g) (inches w.g) (inches w.g)
300 0.10 0.05 0.08
400 0.20 0.10 0.15
500 0.25 0.15 0.20
600 0.35 0.20 0.30
Step 5. Specify the Series IV Blender SectionPerformance Specification DescriptionThe following Basic Performance Specification is designed to provide sufficient mixing for systems to operate with outside air temperaturesdown to 0°F with outdoor air percentages of up to 30%.This level of performance is designed to provide enough mixing for typical air-handling systems. If a system designer feels that a particular system requires more mixing than provided by the Blender Section, thenthe use of a Blender Box mixing box should be considered.
Construction and Performance SpecificationFurnish complete mixing section consisting of static air mixers and mixing section in one rigid unit. Housing shall be sized to match air-handling unit dimensions without transitions or major field modifications. Mixing section shall be no longer than ( ____" ) or (as shown onair-handling equipment schedule). When combined with a typical mixing box the mixing section shall provide a Mixing Effectiveness of65% with a minimum outdoor air percentage of 30%. The pressure drop of the mixing section shall not exceed ( ______ inches w.g.) or (as shown on air-handling equipment schedule), including the orifice effect of the mixers.
Mixing section shall be of double wall construction and be made of 18Ga Galvanized steel. Unit shall be insulated with 2” thick 2# densityinsulation. Optional access doors to be 2" thick double wall design and insulated with 2" thick 2# insulation.
Mixing section shall be the Series IV Blender Section as manufactured by Blender Products, Inc. or approved equal.
Step 4. Determine the pressure loss for the selected Blender Section.Determine the pressure loss for the selected Blender Section using the chart below. Please note that the pressure loss shown is anaverage value; the actual pressure loss may vary slightly due to variations in the dimensions of different air-handling units.The individualinterface guide information sheets should be consulted for actual pressure loss for each air-handling unit.
Engineered Air Mixing Systems and Equipment
5010 Cook Street • Denver, Colorado 80216Phone: 303.295.6111 • Fax: 303.296.1520
Toll-free: 800-523-5705E-mail: [email protected]: www.airblender.com
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