High Performance Mixing Systems for Retrofit Applications · Split Modules MM60 through MM83 Back...
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MIXING MODULE High Performance Mixing Systems for Retrofit Applications © 1999 Blender Products, Inc. MM 1/99 Engineered Air Mixing Systems and Equipment 5010 Cook Street • Denver, Colorado 80216 Phone: 303.295.6111 • Fax: 303.296.1520 E-mail: [email protected] Internet: www.airblender.com BENEFITS: • Improve air mixing • Stop freeze-stat trips • Prevent frozen coils • Reduce damper leakage • Improve IAQ • Improve control sensor accuracy
Transcript of High Performance Mixing Systems for Retrofit Applications · Split Modules MM60 through MM83 Back...
MIXING MODULEHigh Performance Mixing Systems for Retrofit Applications
© 1999 Blender Products, Inc.MM 1/99
Engineered Air Mixing Systems and Equipment
5010 Cook Street • Denver, Colorado 80216Phone: 303.295.6111 • Fax: 303.296.1520E-mail: [email protected]: www.airblender.com
BENEFITS:• Improve air mixing• Stop freeze-stat trips• Prevent frozen coils• Reduce damper leakage• Improve IAQ• Improve control sensor
accuracy
Why do I need a Mixing Module?
One of the significant problems associated with aging air-handlingunits is a system’s inability to operate efficiently given IAQ standardsthat were adopted since the original system startup. Because agreater percentage of outdoor air is required to be introduced intooccupied areas, air-handling units without proper mixing will mostlikely experience problems associated with air stratification (i.e.,freeze-stat trips and frozen coils, sensor errors, and inadequatefresh air distribution). Aging dampers that have begun leaking further complicate these problems.
The most obvious solution to these problems is to replace theentire mixing box and dampers to ensure adequate mixing. However,because most existing buildings have significant space constraints,the options are often limited to a custom design for a mixing boxthat is then built onsite.This process can be extremely costly andthe results are often unpredictable.
The Mixing Module offers a less costly and more predictablesolution to these problems.The Mixing Module is a complete mixingbox specially designed for retrofit applications. It is a pre-engineeredsystem designed to fit most major brands of air handlers. Althoughit can be designed as one complete piece, it is also available inmultiple sections to accommodate buildings with significant spaceconstraints. Once installed, the Mixing Module virtually eliminatesthe problems associated with air stratification.
Product Description
Standard Features:• Double-wall galvanized steel construction• High-quality, low leakage air foil dampers• Series IV Air Blender® static mixing devices• Field adjustable inlet arrangements • Bolt together construction, i.e., unit can be taken apart
to assemble in restrictive areas• Made to replace existing air handler mixing boxes
Optional Features:• All aluminum construction for weight reduction • Product can be shipped knocked-down for assembly in field • View port available to view damper operation without
opening doors • Custom Mixing Modules can be designed for specific
applications
The diagrams below show how a Mixing Module can be applied to an existing air handler:
Mixing Module Application Diagram 1Top mount to filter/mixing box.
Mixing Module Application Diagram 2Top mount using existing space of combination filter/mixing box.
Before:Existing filter/mixing box with restricted area at OA intake.
Close-off existing OA opening
Extend OA plenum Remove or fully
open RA damper
RA
OA
OA
Replace V-Bank filter with flat as alternate
Before:Existing filter/mixing box.
After:Existing filter/mixing box with restricted area at OA intake.
After:Replace existing filter/mixing box with Mixing Module.
RA
OA
RA
OA
RAExtend returnair duct tomatch newMixing Module
Locate module to maintainproper mixing distance
New flat filter
0.40
0.50
0.60
0.70
0.80
0.90
1.00
100% 90% 80% 70% 67% 60% 50% 40% 33% 30% 20% 10% 0%
% OA
Mix
ing
Eff
ecti
ven
ess
(%)
Standard Distance x .50 Standard Distance x .75 Standard Distance in Chart Below
Necessary Distance Downstream of Mixing Module:
Notes:• The pressure drop will vary from .3 to .5 In.WG based on
the capacities shown at the left.• This pressure drop should be considered approximate and
may change depending on the damper position, along withthe installation conditions.
• The pressure drop includes the effects of the dampers combined with the Air Blender units.
• Please contact the factory for a pressure drop analysis for a specific application.
Technical Information
Mixing Module Mixing Effectiveness
Nominal Capacity for Mixing Module
Module Minimum MaximumModel No. Flow CFM Flow CFM
MM 4 1600 2000 14"
MM 6 2400 3000 16"
MM 8 3200 4000 18"
MM 10 4000 5000 16"
MM 15 6000 7500 20"
MM 21 8400 10500 24"
MM 24 9600 12000 26"
MM 32 12800 16000 30"
MM 40 16000 20000 32"
MM 50 20000 25000 36"
MM 60 24000 30000 48"
MM 83 33200 41500 56"
Standard Distancefrom MM to next
DownstreamComponent
Dimension Table Match-up Guide
Notes:• All weights are approximate and are in pounds• Nominal CFM shown is for 500 FPM plenum velocity• Choose from four optional inlet arrangements
(field adjustable) • Mixing Modules are split and require bolt-together
construction (MM60 through MM83)• For other Air Handler matchups, please contact factory.
Optional Inlet Arrangements (side view shown):1. 2. 3. 4.
Mixing Module Guide
Patented Series IVAir Blenders
Inlet
A
4"
3"
3"
B
B
H
W
A
4"
4"
3"
3"
B
B
H
W
WE
L
Inlet
Inlet
Inlet
Inlet
Air
Flow
Inlet
Inlet
Inlet
Inlet
Inlet
E
L
Inlet
Air
Flow
Inlet
Inlet
Inlet
Patented Series IVAir Blenders
Modules bolt together
W/2 W/2
Multiple Air Blenders MM4 through MM50
Split Modules MM60 through MM83
Back View
Back View
Side View
Side View
Discharge View
Discharge View
