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 22 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 22 Fan Arrays Supercedes: ED 19008-1

2012 Daikin McQuay 1-800-432-1342 www.DaikinMcQuay.com

Figure 1: Unit Components

Advantages & Notes 22 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

A SA: [70F / 55F]A Ccoil: [55F / 55F]A OA: [75F]A RA: [80F / 67F]B OA: [75F]B Ccoil: [55F / 55F]B SA: [58F / 55F]B RA: [80F / 67F]C SA: [58F / 55F]C Hcoil: [OFF]C Ccoil: [55F / 55F]C OA: [75F]C RA: [80F / 67F]D Ccoil: [70F / 55F]D OA: [90F / 78F]D RA: [80F / 67F]D Hcoil: [OFF]D SA: [70F / 55F]E RA: [80F / 67F]E Bypass: [83F / 70F]E Ccoil: [70F / 55F]E SA: [70F / 55F]E OA: [95F / 78F]F OA: [95F / 78F]F RA: [80F / 67F]F SA: [70F / 55F]G OA: [75F / 70F]G RA: [80F / 67F]G MzCold: [55F / 55F]G MzHot: [120F / 68F]002 Text1: 004 Text1: 005 Text1: 006 Text1: 003 Text1: 001 Text1: 027 Text1: 009 Text1: 010 Text1: 011 Text1: 012 Text1: 013 Text1: 014 Text1: 015 Text1: 019 Text1: 020 Text1: 021 Text1: 022 Text1: 023 Text1: 007 Text1: 024 Text1: 025 Text1: 026 Text1: 028 Text1: 029 Text1: 030 Text1: 031 Text1: