Daikin VRV Reference Manual
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Daikin VRV Reference Manual

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VRV
Reference
Guide
01.17

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  • Page 1 Reference Guide 01.17...
  • Page 2 About Daikin: Daikin Industries, Ltd. (DIL) is a global Fortune 1000 company which celebrated its 90th anniversary in May 2014. The company is recognized as one of the largest HVAC (Heating, Ventilation, Air Conditioning) manufacturers in the world. DIL is primarily engaged in developing indoor comfort products and refrigeration systems for residential, commercial and industrial applications.

  • Page 3: Table Of Contents

    Capacity Range & Operating Limits ..........12 Nomenclature ..................15 SYSTEM SELECTION Indoor Unit Range ................18 Indoor Unit Consideration ..............20 Zoning VRV Systems with DZK ............24 Heat Pump or Heat Recovery? ............26 Air Cooled or Water Cooled? ............29 Solutions For Ventilation ..............32 DESIGN OPTIMIZATION System Zoning ...................36...

  • Page 5: System Overview

    System Overview...

  • Page 6: The Features Of Vrv

    The Features of VRV Features & Benefits to Using VRV A VRV system is similar to a chiller but circulates refrigerant to each zone instead of water A VRV heat pump system has performance and design attributes similar to a 2 pipe chiller...
  • Page 7 The ease of both design and installation has been a major factor in the success of VRV in the global market. Simple methodology sees VRV regularly utilized in all project sizes from 3 ton to several 1,000 ton. Ultra-High Energy Efficiencies...

  • Page 8: Key Points For Selection

    Optimizing VRV System Selection The most successful users of VRV equipment understand the ¡ importance of a fully optimized design A key factor that ensures optimized VRV equipment selection is ¡ to understand the correlation between SYSTEM DIVERSITY & CONNECTION RATIO A fully optimized design can realize a number of benefits:...
  • Page 9 – In this example, if the maximum load is called for, the outdoor unit ¡ will fall short of demand by 3,954btu – This VRV design has a 2% system diversity To summarize: Connection Ratio does NOT indicate the diversity of a VRV system.
  • Page 10 Key Points for Selection (cont.) Obtain Project Data Before selection of any VRV system, a minimum amount of information is required for accurate equipment selection and to apply an optimized design For an accurate selection of indoor units the following information is required:...
  • Page 11 Module ¡ On VRV-III, if systems operated >130% indoor unit thermo-ON, all FCU were set to low fan speed. On VRV IV this function can now be overridden at commissioning stage ¡ For FXFQ 07, 09 models, connection ratio is limited to 130%...

  • Page 12: Capacity Range & Operating Limits

    456 (38) Total capacity index of connectable indoor units for Aurora Series and 72 MBH 575V VRV IV must be within 70% - 200%. Total capacity index of connectable indoor units for 575V VRV IV 96MBH – 384MBH must be within 50% - 200%.
  • Page 13 -22 F VIA extended capacity tables VIA technical cooling function Cooling operation for VRV IV Heat Pump single module systems (RXYQ72/96/120/144/168T) can be extended down to 10˚F, from the standard limitation of 23˚F under defined conditions. Contact your local Daikin manufacturer’s...

  • Page 14: Refrigerant Piping Limitations

    Capacity Range & Operating Limits (cont.) Refrigerant Piping Limitations VRV-IV VRV-IV VRV-IV Liquid Line W-Series VRV-IV S VRV-IV S Heat Heat Aurora Max (feet) Water (36) (48-60) Pump Recovery Series Cooled Vertical Drop (295)* (295)* (295)* Between (49)† (49)† Vertical...

  • Page 15: Nomenclature

    How to Read Model Number Indoor Units Indoor Unit Standard Category compatibility symbol U: United States of America FX: VRV system indoor unit Power supply symbol Indoor unit type VJ: 1 phase, 208/230V, 60 Hz Example: M: Concealed Series/ Design Change...

  • Page 17: System Selection

    System Selection...

  • Page 18: Indoor Unit Range

    Indoor Unit Range Sizes & Accessories Available of all IDU’s TYPE MODEL UNIT SIZES FXFQ-T Round-flow Ceiling mounted cassette FXZQ FXZQ 4 way blow ceiling mounted cassette FXUQ Under Ceiling Mounted Cassette FXEQ Ceiling-Mounted Cassette (Single Flow) FXDQ Slim Ducted Ceiling Concealed FXMQ_PB DC Ducted...
  • Page 19 Optional Indoor Unit Accessories available to enhance your Daikin VRV solution: Options MERV 8 Filters ✔ MERV 13 Filters ✔ ✔ ✔ Economizer ✔ ✔ Option DZK (Zoning Kit) ✔ ✔ ✔ Connection Kit AUX Heat ✔ ✔ ✔ ✔ ✔ ✔ ✔...

  • Page 20: Indoor Unit Consideration

    Indoor Unit Considerations CASSETTE UNITS provide the best combination of economic installation with a good level of flexible project design. Fresh air supply is possible but limited Considerations: Is there a ceiling void space? ¡ What is the height of the void space? ¡...
  • Page 21 DUCTED units offer the ultimate in flexibility of design, air distribution and integration of ventilation. It also tends to be the most expensive installed cost option. However cost can be minimized by serving multiple rooms with a single unit - the loss of individual room units can be countered with thoughtful control design.
  • Page 22 Indoor Unit Considerations (cont.) CONCEALED units offer the opportunity to hide away the equipment when there is no ceiling void but the client does not wish to use exposed units or else has similar equipment existing and sees the benefit of retro fitting with minimum disruption and expense.
  • Page 23 EXPOSED units usually offer the client the most economical installed cost solution on a VRV system. These types of units are most often used when there are budget constraints or where an area has no void space/enclosure to conceal other unit types.

  • Page 24: Zoning Vrv Systems With Dzk

    Zoning VRV systems with DZK VRV Meets VAV - Features & Benefits DZK - Daikin Zoning Kit The DZK solution increases t he f le x ib i l i t y o f V R V applications by allowing...
  • Page 25 Increases comfort levels by allowing more individual zone control ¡ Reduces installation expense and maintenance costs ¡ Reduces the amount of refrigerant required in the installation ¡ Increases the flexibility of the VRV application design ¡ Ducted Set-Up with DZK Zoning Box Range Product Reference DZK030E4...

  • Page 26: Heat Pump Or Heat Recovery

    Heat Pump or Heat Recovery? The Various Heat/Cool Changeover Options Heat Pump The 2 pipe Heat Pump system is the equivalent of a 2-pipe chilled ¡ water system A heat pump system provides the means of heating OR cooling at ¡...
  • Page 27 Should I Use Heat Pump or Heat Recovery? There are three main factors that dictate whether a HP or HR system should be selected. All these factors should be considered in each case to determine an appropriate selection: Climate Zones of North America Subarctic / Arctic Very Cold Marine...
  • Page 28 Heat Pump or Heat Recovery? (cont.) BUILDING LAYOUT Sites with open plan areas and/or similar orientation will often be satisfied by a heat pump system, irrespective of geography. On the other hand, if the site has many aspects, individual rooms and/or heat loads, this may define the client requirement toward heat recovery.

  • Page 29: Air Cooled Or Water Cooled

    Air Cooled or Water Cooled? Factors that Benefit the use of VRV-IV W-Series Air to air VRV systems make up the majority of VRV installations This is due to the following: Ease of installation (no water system required) ¡ Less initial capital costs ¡...
  • Page 30 Air Cooled or Water Cooled? (cont.) Water Cooled VRV - Geothermal A ground-source VRV heat pump system combines the advantages of both technologies into one system, making it one of the most efficient HVAC systems available and achieving savings over either GSHP or VRF on their own.
  • Page 31 * (Be aware that conditions need to be met when EWT for heating is required below 50°F – seek assistance for these applications) Other consideration: When VRV is to be applied with an open loop system, a 3rd party ¡ heat exchanger is required to ensure the plate heat exchanger of the VRV condensing unit operates in a closed loop system.

  • Page 32: Solutions For Ventilation

    Solutions for Ventilation Range & Limitations of our Ventilation Options 1000 1500 2000 2500 3000 5000 7500 10000+ VAM -300-1200 Energy Recovery Ventilator DVS DOAS AHU Unit 670 – 4000 Interlaced Coil up to AHU Integration Kit 34 ton (3 kits on one (2-16 ton) HP system) Destiny AHU Only 600-15000 cfm options...
  • Page 33 Typically Daikin equipment has been applied using a standard rule of thumb that a maximum of 20% OA should be used for ducted fan coil units (FXMQ, FXDQ and FXNQ). However, this practice is not always applicable as this rule of thumb is based upon introducing OA at nominal conditions.
  • Page 34 FCBA = 50°FDB– 95°FDB FCB = 90 - 110% 3. Suitable for all climates 4. Allows for sharing load between ventilation system and VRV system 1. Pretreated EKEXV FCBA = 50°FDB – 95°FDB FCB = 90 - 110% ventilation directly to the space 2.

  • Page 35: Design Optimization

    Design Optimization...

  • Page 36: System Zoning

    System Zoning Guideline to Optimized Zoning of Systems Typical Zoning of Heat Pump When more than one system is required, it is good practice to zone units that are positioned on the same orientation or are subject to common load profiles. This maximizes the scope for correct heating/cooling demands to be met.
  • Page 37 Typical Zoning of Heat Recovery Conversely, with heat recovery it is better to ensure that units on different orientations are matched together. This ensures more potential for heat recovery to occur at any given time and thereby optimizing energy savings. Note: FCU Performance is not affected by varying indoor unit combinations.
  • Page 38 System Zoning (cont.) Optimized (mixed) It is important to avoid defining a project as a ‘heat recovery job’ or ‘heat pump job’. There are often applications where a mixture of both types is the best design practice - and can reduce costs to the client.
  • Page 39 When to use MULTIPLE MODULES There are several advantages to linking VRV condensing units together: Less piping & total refrigerant needs, superior efficiencies due to more outdoor unit heat exchange surface area at partial load and a greater likelihood of heat recovery (on 3-pipe) to occur due to increase in varying zones on the systems.

  • Page 40: Branch Selector Boxes

    Branch Selector Boxes Overview of BSQ Box Range & Features Daikin heat recovery systems provide the option of single or multiple port BSQ (branch selector) boxes BSQ BOX Multi-port type Single port type (4 or 12 ports) Grouped Units Single Units...

  • Page 41: Single Or Multi Bsv Boxes

    Single or Multi BSQ Boxes? Optimized Selection of BSQ Boxes When selecting HEAT RECOVERY BRANCH SELECTOR BOXES there is a limitless number of ways to group indoor units TOTAL PIPING 696 ft REQUIRED ........ REFNET JOINT SETS .
  • Page 42 ........ As shown in this scenario, being able to select single or multiple BSV boxes, in addition to zoning some units together on a single port, Daikin heat recovery allows the ultimate in flexibility, even on a single system.

  • Page 43: Piping Sizes And Optimization

    & REFNET joint sizes. VRV IV HP UNIT SIZE...
  • Page 44 Piping Sizes and Optimization (cont.) UNIT SIZE VRV IV HP Piping Required* REFNETs Required 1 set of - 3/4 & 5/8 1 set of size 72 0 sets of - 3/4 & 1/2 2 sets of size 33 4 sets of - 3/4 & 3/8 8 sets of size 22 6 sets of - 5/8 &...

  • Page 45: Outdoor Unit Installation Space

    At concept stage one of the most common requirements, especially in built up areas, is to establish that there is space to fit the outdoor equipment. The ‘de-centralized’ nature of VRV provides a great deal of flexibility however the multitude of service space combinations in the engineering book still do not cover fully the bespoke nature of project application.
  • Page 46 The distance can vary according to a number of factors however 16” between units will cover most all scenario’s. Therefore, a great rule of thumb to see that a space is suitable for VRV equipment is: 12" x 16" x 20" Think of the service engineer! The minimum service space (20") allows for the removal of a...

  • Page 47: Heat Pump Changeover

    Heat Pump Changeover The Various Heat/Cool Changeover Options There are no less than ways to provide heat/cool changeover on a heat pump system. Most of these also apply to heat recovery FCU’s grouped on a single port of a BS Box (think of the BS box as a mini heat pump system).
  • Page 48 VIA Ambient Sensor MANUAL CHANGEOVER Summer / Winter Switch: A Daikin supplied switch is attached to “ABC” terminals on the external unit to allow manual changeover from a central location. This is commonly found on sites with facilities managers or multi- tenant sites such as hotels where heat pump was installed in an exclusively cooling region.
  • Page 49 Note: Both "Group" changeover methods require a Daikin i-Touch Manager to operate. To summarize: With ALL changeover options, when a system mode is changed, the indoor units on the system are not forced into heating or cooling.

  • Page 51: Controls & Standards

    Controls & Standards...

  • Page 52: Controls Portfolio

    Controls Portfolio Range of Zone and Centralized Controllers Scalable controls offering to match a building’s requirement DMS502B71 BACnet BACnet ® ® Interface Open (Shown with Protocol optional DAM411B51 expander) DMS504C71 LonWorks ® LonWorks ® Open Interface Protocol DTA116A51 Modbus ® Modbus Adaptor ®...
  • Page 53 Project requirements drive the controls selection process Daikin VRV Controls Project Requirements BRC1E73 BRC2A71 DCS302C71 DCS301C71 Navigation Simplified Centralized Unified • • Simple individual zone control • Independent Cool and Heat setpoints Individual zone control • with weekly programmable scheduling Multi-zone control without •...
  • Page 54 Project requirements drive the controls selection process (cont.) Daikin VRV Controls Intelligent Touch Manager Intelligent WAGO WAGO Touch BACnet ® Project Controller Controller Requirements BACnet BACnet ® ® Basic Client Server Option Option • • • Independent Cool and •...
  • Page 55 Project requirements drive the controls selection process (cont.) Daikin VRV Controls BACnet Interface ® LonWorks Modbus ® Interface Adaptor Project Requirements Basic With Plug-in Independent Cool and • • • Heat setpoints Individual zone control with • • weekly programmable scheduling Basic central point on/off •...

  • Page 56: Local Control Options

    Local Control Options Features & Benefits of the Room Controller BRC1E73 - Navigation Room Controller Daikin room controllers offer a vast array of features that provide the ultimate in flexibility and benefits that many other manufacturers’ are unable to offer.

  • Page 57: Featured Controls

    DOAS, and etc. DCM014A51 – iTM BACnet Server Gateway Option With iTM BACnet Server Gateway Option, Building Management Systems (BMS) can monitor and control VRV indoor units via the BACnet/IP protocol. This option provides seamless control logic integration between iTM and BMS.
  • Page 58 To resolve the challenges of integrating the VRV systems, Daikin provides BMS Plug-ins to the integrators for easy integration with the VRV system. BMS Plug- ins are pre-programmed objects and graphics built for Niagara specifically for Daikin VRV. By the use of free-of-cost BMS ®...

  • Page 59: Codes & Standards

    RcL not to exceed 26lbs/1000cuft ASHRAE Std 15 (13lbs in restricted/institutional occupancies). Canada: B52 Efficiency AHRI Std 1230 Daikin VRV is tested and rated to AHRI Std 1230. & ASHRAE Std 90.1 Daikin VRV performance ratings exceed Performance ASHRAE Std 90.1 2010.

  • Page 60: Tips & Considerations

    Utilize VRV Xpress selection software to ensure equipment selections ¡ are in accordance with all limitations and system capabilities. Maximize the use of Daikin City portal to auto generate submittal ¡ packages and streamline project management, update and quoting (where applicable).

  • Page 61: Future Documents & Data

    Further Documents and Data Best Practice Guides Further information for the application of VRV is available in form of Best Practice Guides. Hard copies are available and can also be obtained online via daikincity.com CODES & STANDARDS CODES APPLICATION GUIDE APPLIC ENERGY-INTELLIGENT™...
  • Page 62 Where to find official information? Product Detail Features Summary ◆ ◆ ◆ Summary Table ◆ ◆ ◆ ◆ Specification Electrical ◆ ◆ ◆ ◆ Dimension ◆ ◆ ◆ Drawings Piping ◆ ◆ ◆ Wiring ◆ ◆ Capacity ◆ ◆ Correction Piping ◆...
  • Page 64 www.daikincity.com For more information: Sales and Technical Support: 1-855-DAIKIN1 www.daikincomfort.com or daikinac.com PM-DVRV 01-17...

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