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Engineered for flexibility and performance™
Custom Air Handler SolutionsCustom Units to Meet Your Unique Design Needs
DG 19008-2
Contents
Horizontal Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Horizontal with Standard Economizer Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Stacked Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Dual Path Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Heat Recovery Wheel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Fixed Plate Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Multizone Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Dedicated Exhaust Energy Recovery Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Redundant Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Short Economizer with Exhaust Air Dampers in Return Fan Section . . . . . . . . . . . . . . . . . . . . 10Short Economizer with Exhaust Air Dampers in Return Fan Section – Side Return . . . . . . . . 11Side Return Fan Opening – Version II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Side-by-side Energy Recovery Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Dual Wheel Energy Recovery Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Plate Heat Recovery Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Dual Duct AHU with Final Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Energy Wheel On Skyline™ Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Dual Direct Drive Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Double Wheel AHU with UV Lights: 3 Fans, Two Exhaust Air Paths . . . . . . . . . . . . . . . . . . . . 19Side-by-side Wheel (over 25 kCFM) and Mis-Matched Air Paths . . . . . . . . . . . . . . . . . . . . . . 20Stacked ERV with Mismatched Heights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Dual Path Energy Recovery Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Total Wheel + Plate with Two 2×2 Fan Arrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Triple Stacked Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Humidifier & Evaporative Cooling Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Split Outside Air Dampers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Bypass Damper on Cooling Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Side-Car Energy Recovery Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Design Guide DG 19008-2-001Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Horizontal Configuration Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components
NOTE: Default temperatures are typical and in °F, enter your own data by selecting from the drop-down list or highlighting the contents and typing in your custom data.
Filter Section
Supply Fan
Cooling Coil
Heating Coil
Dampers
Add temp boxes on all standard confi gurations
Outdoor Air
Return Air
Supply Air
Standard template in the software program. Temperature boxes are editable.
Design Guide DG 19008-2-002Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Horizontal with Standard Economizer Configuration Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components
NOTE: Default temperatures are typical and in °F, enter your own data by selecting from the drop-down list or highlighting the contents and typing in your custom data.
Supply FanReturn Fan
Cooling Coil
Heating Coil
Dampers
Outdoor AirExhaust Air
Return AirSupply Air
Design Guide DG 19008-2-003Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Stacked Configuration Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components
NOTE: Default temperatures are typical and in °F, enter your own data by selecting from the drop-down list or highlighting the contents and typing in your custom data.
Supply Fan
Cooling Coil
Heating Coil
Dampers
Filter Section
Outdoor Air
Return Air
Supply Air
Design Guide DG 19008-2-004Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Dual Path Configuration Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components
NOTE: Default temperatures are typical and in °F, enter your own data by selecting from the drop-down list or highlighting the contents and typing in your custom data.
Supply Fan
Cooling Coil
Cooling Coil
Heating Coil
Heating Coil
Damper
Damper
Filter Section
Filter SectionReturn Air
Supply Air
Outdoor Air
Design Guide DG 19008-2-005Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Heat Recovery Wheel Configuration Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components
NOTE: Default temperatures are typical and in °F, enter your own data by selecting from the drop-down list or highlighting the contents and typing in your custom data.
Supply Fan
Exhaust Fan
Cooling Coil
Energy Recovery
Wheel
Heating Coil
RecirculationBypass
Bypass Damper
Bypass Damper
Filter Section
Filter Section
Return Air
Exhaust Air
Outdoor Air Supply Air
Design Guide DG 19008-2-006Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Fixed Plate Configuration Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components
NOTE: Default temperatures are typical and in °F, enter your own data by selecting from the drop-down list or highlighting the contents and typing in your custom data.
Supply FanExhaust Fan
Cooling Coil
Heating Coil
Damper Damper
Filter Section
Filter Section
Plate
Return Air
Exhaust Air
Outdoor Air
Supply Air
Design Guide DG 19008-2-007Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Multizone Configuration Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components
NOTE: Default temperatures are typical and in °F, enter your own data by selecting from the drop-down list or highlighting the contents and typing in your custom data.
Supply Fan
Cooling Coil
Heating Coil
Damper
Damper
Dampers
Filter Section
Return Air
Outdoor Air
MutizoneCold Air
MutizoneHot Air
Design Guide DG 19008-2-008Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Dedicated Exhaust Energy Recovery Unit Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
The dedicated exhaust energy recovery unit provides more energy recovery, and often at a lower cost than typical solutions. It is well suited for LEED® buildings and schools because of its ability to economically handle large ventilation rates.
Figure 1: Unit Components
Advantages• Recover energy from Class I & II air streams
- Class I air is defined by Standard 62.1 as normal return air with no odors or health issues - Class II air has some odor, but no health risks (ie: bathroom or cafeteria exhaust) The percentage of class 2 air that may be re-designated as class 1 is limited to no more than 10% by ASHRAE standard 62.
• A single air handler for both exhaust air streams• A lower first cost than multiple smaller ERUs for each restroom• Damper and wall arrangement prevents Class II from recirculating to the building• Will work for VAV and CAV type systems• Bypass dampers can be added to the energy recovery wheel to save fan energy in economizer mode
Side View
Design Guide DG 19008-2-009Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Redundant Fans Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Redundant fans provide 100% back-up for supply and return fans. This can be used to enhance reliability as well as simplify scheduling of maintenance and service work. Other features that are shown on this unit include:
1 . Bypass dampers on the energy recovery wheel to save fan energy when in economizer mode. 2 . Return air bypass damper to allow for up to 100% recirculated air in night mode.
Figure 1: Unit Components
Advantages• Complete flexibility in fan selection allows fans to be identical as well as the option to mix fans for different
operating conditions• Smaller footprint than two units or storing backup fans and parts nearby
Side View
Design Guide DG 19008-2-010Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Short Economizer with Exhaust Air Dampers in Return Fan Section Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
A shorter AHU can be selected by providing exhaust air dampers in the return fan section.
Figure 1: Unit Components and Dimensions
Advantages• Shorter footprint and lower cost than traditional air side economizers• Flexible damper location for exhaust and OA dampers to accommodate installation requirements. (Either side,
top or end)• Installations in cold climates should use a blender and possibly look at splitting the outside air dampers to
encourage better mixing. Check on freeze protection offerings
Plan ViewSide View
Design Guide DG 19008-2-011Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Short Economizer with Exhaust Air Dampers in Return Fan Section – Side Return Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
A shorter AHU can be selected by providing exhaust air dampers in the return fan section. • Side return opening allows for unit to better match building limitations for the return air path• Exhaust air damper is located on the left hand end of the AHU• Damper locations can be customized to any side or size in order to accommodate installation requirements.
The designer should remember to pay attention to air mixing in climates with cold or hot & humid conditions
Figure 1: Unit Components and Dimensions
Advantages• Shorter footprint and smaller unit size than a traditional air side economizers• The smaller size can provide a lower cost depending on the damper size requirements of the unit
Plan ViewSide View
Design Guide DG 19008-2-012Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Side Return Fan Opening – Version II Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
Advantages & Notes • L-shape fit best in mechanical room• Eliminated fan array needed to shorten unit
Plan View
Design Guide DG 19008-2-013Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Side-by-side Energy Recovery Units Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
A side-by-side arrangement can simplify layout of energy recovery units
Figure 1: Unit Components
Advantages• Exhaust and supply air streams do not have to evenly match dimensions. Wheel performance will change• Large units may not fit in an over/under arrangement • Flexible wheel selection and placement can help the designer to optimize performance
Plan View
Side View
Design Guide DG 19008-2-014Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Dual Wheel Energy Recovery Unit Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
Advantages• A dual wheel AHU combines a total energy wheel with a sensible wheel that provides very good 100% outside
air performance. • The addition of the sensible wheel gives a higher effectiveness and reheats the supply air from saturated to a
more neutral relative humidity • These are often supplied on geothermal WSHP projects because they can significantly lower the outside air
loads and results in a smaller geothermal loop
Side View
Design Guide DG 19008-2-015Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Plate Heat Recovery Unit Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
Plate AHU Energy Recovery• Supply air stream• Return air stream• Exhaust air stream• Sensible recovery from exhaust air• Economizer air stream • Stacked arrangement
Side View
Design Guide DG 19008-2-019Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Dual Duct AHU with Final Filters Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
Advantages & Notes • Replacement units for healthcare that now need final filters
Side View
Design Guide DG 19008-2-020Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Energy Wheel On Skyline™ Unit Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Energy Wheel on Skyline
Advantages• Low profile unit with energy recovery• Rooftop application frees interior space for customer use • Only use the horizontally mounted wheel if very low height is required. A vertically mounted wheel is available
in a side-by-side that will be a lower cost and smaller footprint.
Side View
Design Guide DG 19008-2-021Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Dual Direct Drive Fans Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
Advantages & Notes• Better redundancy, footprint, turndown, etc. • Possible on large and small units
Plan View
Design Guide DG 19008-2-022Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Double Wheel AHU with UV Lights: 3 Fans, Two Exhaust Air Paths Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
• The two separate exhaust air streams allow isolation of flows and optimization of separate fan systems.• The dual wheels provide a very efficient treatment of outside air that can lower first cost expenses for
compressor cooling, heating and possible geothermal loop costs.
Side View
Design Guide DG 19008-2-023Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Side-by-side Wheel (over 25 kCFM) and Mis-Matched Air Paths Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
Advantages & Notes • Single supply air path is larger than Outside Air path• Dual plenum fans• Bypass dampers on wheel
Plan View
Design Guide DG 19008-2-024Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Stacked ERV with Mismatched Heights Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
Advantages & Notes• Split level of stacked section does not have to match single height section• Reduces height and cost of total unit• Differences can be larger, but usually not huge
Side View
Design Guide DG 19008-2-025Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Dual Path Energy Recovery Unit Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
Advantages & Notes • Dual path provides an exhaust airflow only path and a second path for return or exhaust airflow.
It is possible to draw exhaust air from both exhaust air streams in this case if the negative static of the supply fan is less than the exhaust at the recirculation damper.
Side View
Design Guide DG 19008-2-026Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Total Wheel + Plate with Two 2×2 Fan Arrays Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components
Advantages & Notes • 2×2 fan array provides redundancy and a smaller footprint• Plate and coil wrap-around provides treatment of outside airflow• Plate has zero cross leakage
Side View
Design Guide DG 19008-2-027Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Triple Stacked Unit Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
Advantages & Notes • Third level simplified duct tie-in for contractor
Side View
Design Guide DG 19008-2-028Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Humidifier & Evaporative Cooling Section Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components
Advantages & Notes• Nortec model MH direct humidification for Data Centers• Evaporative cooling for the Western US• Simple section in Vision AHU• Stainless basin• Controller included
Design Guide DG 19008-2-029Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Split Outside Air Dampers Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
Advantages• Lower cost air measuring with smaller OA damper• LEED and Std 189 jobs may require all OA be measured
Design Guide DG 19008-2-030Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Bypass Damper on Cooling Coil Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
Advantages• Bypass damper can save the fan energy for the air pressure drop of the coil. Typically
.75"-1.00" of static can be reduced off of the fan for all economizer hours and heating hours.
• Can be provided as a single height unit or as a multiple height unit for larger units that may have interference issues.
Design Guide DG 19008-2-031Custom Air Handler Solutions Group: Air Handling Units
Date: November 2012Side-Car Energy Recovery Wheel Supercedes: ED 19008-1
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com
Figure 1: Unit Components and Dimensions
Advantages• Provides a more square footprint where a long AHU might not work• Can match a smaller wheel with a a larger AHU to handle smaller percentages of OA
with a larger return air AHU
©2012 Daikin McQuay • 1-800-432-1342 • www.DaikinMcQuay.com DG 19008-2
