Daikin VRV Reference Manual
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Daikin VRV Reference Manual

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Summary of Contents for Daikin VRV

  • Page 1 VRV Reference Guide...
  • 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

    Nomenclature ..............17 Piping and Wiring Guide ..........18 SYSTEM SELECTION Indoor Unit Range ............24 Indoor Unit Consideration ..........26 Zoning VRV Systems with DZK ........30 Heat Pump or Heat Recovery? ........32 Air Cooled or Water Cooled? .........35 Solutions For Ventilation ..........38 DESIGN OPTIMIZATION System Zoning ...............42...

  • 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 Controller From controlling temperature in individual areas to the remote monitoring and control of multiple sites, the Daikin VRV system has a wealth of propriety control options to cover all end user requirements and ensuring exceptional levels of comfort control.

  • Page 8: Key Points For Selection

    Key Points for Selection System Diversity vs Connection Ratio 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 &...
  • Page 9 VRV defines the DIVERSITY of the system at: 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 In Summary: Connection Ratio does NOT indicate the diversity of a VRV system.
  • Page 10 Key Points for Selection 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 Connection Ratio Limits AIR COOLED WATER COOLED SYSTEM TYPE ALL VRV-IV (3-PHASE) VRV-S T-Series Series FXZQ-05 All FXDQ FXSQ-05T FXDQ Indoor FXFQ07/09 All FXMQ(P) FXZQ-05T FXMQ(P) Unit Other FXSQ-05T All FXAQ FXFQ-07 Units Units FXSQ07-54T Type Units and All FXSQ07T-54T...
  • Page 12 Key Points for Selection Oversized for cooling Despite advanced control methods, oversizing of equipment, even with Variable Refrigerant Volume technology, can lead to indoor units overcooling the space and cycling on and off. This results in poor temperature control. In addition to large temperature swings, an indoor unit that cycles on and off does not provide continuous de-humidification.

  • Page 13: Application Limits

    Application Limits Refrigerant Piping Limits AIR COOLED WATER COOLED PIPING LIMITATIONS VRV-IV VRV-IV VRV Aurora VRV IV-S VRV IV-S Liquid Line Heat Heat (3 Ton) (4 & 5 Ton) PC-Series T-Series Max (ft) Pump Recovery Ambient Vertical Drop (295)¹ (295)¹...
  • Page 14 Application Limits Capacity Range AIR COOLED HEAT PUMP AIR COOLED HEAT RECOVERY 72 (6) 36 (3) 96 (8) 48 (4) 120 (10) 60 (5) 144 (12) 168 (14) 72 (6) 192 (16) 96 (8) 120 (10) 216 (18) 144 (12) 240 (20) 168 (14) 264 (22)
  • Page 15 Capacity Range WATER COOLED (HP & HR) AURORA (HP & HR)* 72 (6)* 72 (6) 96 (8) 96 (8) 120 (10) 120 (10) 144 (12) 144 (12) 168 (14) 192 (16) 192 (16) 216 (18) 240 (20) 240 (20) 264 (22) *Heat pump Aurora will be available from April 2018 288 (24)
  • Page 16 -13 F -22 F VIA technical cooling function VIA extended capacity tables Cooling operation for VRV IV Heat Pump single Indoor Temperature (˚FWB) module systems (RXYQ72/96/120/144/168T) can be extended down to 10˚F, from the standard limitation * Limited to 27˚ F of 23˚F under defined conditions.

  • Page 17: 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 18: Piping And Wiring Guide

    Piping and Electrical Wiring Guide Condensing Unit Pipe Connections...
  • Page 19 (either upstream or downstream). DO NOT DISCARD any accessory until it is clear they are not required DAIKIN SUPPLIED REDUCERS BSQ36 BSQ60 BSQ96 NOTE : Any pipe reducers required on the ODU side are field supply...
  • Page 20 Piping and Electrical Wiring Guide Oil Trap Requirements REFNET Branch Pipe Kits Piping Rules...
  • Page 21 Piping and Electrical Wiring Guide Power Wiring Wiring ODUs in series to 1. Incoming Power from Mains *Allow at least 2” a single CB is NOT an 2. Disconnecting Means spacing between acceptable configuration 3. Outdoor Unit control and line 4.

  • Page 23: System Selection

    System Selection...

  • Page 24: Indoor Unit Range

    Indoor Unit Range Sizes & Accessories Available of all IDU’s TYPE MODEL BUILT-IN / OPTION FXFQ ROUNDFLOW (3’ x 3’) CASSETTE FXZQ-T VISTA ™ (2’ X 2’) CASSETTE FXEQ 1 WAY FLOW CASSETTE FXUQ 4 WAY FLOW UNDER CEILING FXHQ 1 WAY FLOW UNDER CEILING FXAQ WALL MOUNTED...
  • Page 25 TYPE MODEL BUILT-IN / ADD ON FXDQ LSP SLIM CONCEALED DUCTED FXSQ MSP CONCEALED DUCTED FXMQ-P HSP CONCEALED DUCTED FXMQ-M HSP HIGH CAPACITY CONCEALED DUCTED Accessories The best location to find a list of all accessories (for every unit type & size) is via WEBXpress: Click on the 'options' link located at the bottom of the IDU 'properties' window, to reveal the following page: Example Options Page...

  • Page 26: Indoor Unit Consideration

    Indoor Unit Considerations provide the best combination of economic CASSETTE UNITS 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 27 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 28 Indoor Unit Considerations 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 29 EXPOSED 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. None of these units have integral condensate pumps fitted.

  • Page 30: Zoning Vrv Systems With Dzk

    Zoning VRV systems with DZK VRV Meets VAV - Features & Benefits DZK - Daikin Zoning Kit The DZK solution increases the flexibility of VRV applications by allowing multiple zones to be served by one indoor unit fan coil while still providing individual temperature control.
  • Page 31 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 32: 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 any given time Multiple heat pump systems can be zoned and will work »...
  • Page 33 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 34 Heat Pump or Heat Recovery? 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 35: Air Cooled Or Water Cooled

    Boiler ~ Tower Water Loop water loop already running through the building. This negates the need to run copper piping through risers to a remote plant space (be aware that VRV Water Cooled Series CUs are internal mounting units).
  • Page 36 Air Cooled or Water Cooled? 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 37 * (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 38: Solutions For Ventilation

    Solutions for Ventilation Range & Limitations of our Ventilation Options 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 Vision AHU Only 900-100,000 cfm options Rebel Rooftop (DOAS)
  • Page 39 Typically Daikin equipment has been applied using a standard rule of thumb that a maximum of 20% OA can be incorporated into a ducted fan coil unit (FXMQ, FXSQ, FXDQ and FXNQ). However, this practice is not always applicable as this rule of thumb is based upon introducing OA at nominal conditions.
  • Page 40 Config: Config: all climates 78 (82*)°FWB 50-130% 4. Allows for sharing Std Config: Std Config: load between 23°FDB 50-100% ventilation system (FXMQ-MF and VRV system <=30%) Heating Enhanced Enhanced Config: Config: 59 (50*)°FDB 50-130% (FXMQ-MF <=50%) Cooling 95°FDB 1. Pretreated ventilation...

  • Page 41: Design Optimization

    Design Optimization...

  • Page 42: 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 43 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 44: 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 Single port type Multi-port type (4 or 12 ports) Grouped Units Single Units...

  • Page 45: 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 46 ........ 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 47: Optimized Pipe Routes

    Optimized Pipe Routes A factor not often considered before installation is establishing an optimum pipe route. This can be due to the limited choice of riser or outdoor unit location. However, establishing an optimum pipe route and order of unit attachment can realize significant reduction in pipe REFNET joint sizes, as well as refrigerant charge MAIN LINE JOINT...

  • Page 48: 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 49 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 50: Heat Pump Changeover

    Heat Pump Changeover The Various Heat/Cool Changeover Options There are no less than six 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 51 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 52 Note: Both "Group" changeover methods require a Daikin i-Touch Manager to operate. In Summary: With ALL changeover options, when a system mode is changed, the indoor units on the system are not forced into heating or cooling.

  • Page 53: Controls & Standards

    Controls & Standards...

  • Page 54: Controls Portfolio

    Controls Portfolio Range of Zone and Centralized Controllers Scalable controls offering to match a building’s requirement DMS502B71 BACnet ® Interface BACnet® Open Protocol (Shown with optional DAM411B51 expander) DMS504C71 LonWorks ® LonWorks ® Open Interface Protocol DTA116A51 Modbus Adaptor ® Modbus ®...
  • Page 55 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 56 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 57 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 control of all •...

  • Page 58: 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 59: 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 60 DMS502B71 – Interface for use in BACnet ® Interface for use in BACnet is a hardware gateway solution that enables the BMS to monitor and control the VRV indoor units through BACnet/IP protocol. To resolve the challenges of integrating the VRV systems, Daikin provides BMS Plug-ins to the integrators for easy integration with the VRV system.

  • Page 61: Codes & Standards

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

  • Page 62: 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 63: Further Documents & Data

    Further Documents and Data 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 Best Practice Guides CODES & STANDARDS Application Guide Outdoor Unit Layout Guide...
  • Page 64 Where to find official information? Product Detail Features Summary ◆ ◆ ◆ Summary Table ◆ ◆ ◆ ◆ Specification Electrical ◆ ◆ ◆ ◆ Dimension ◆ ◆ ◆ Drawings Piping ◆ ◆ ◆ Wiring ◆ ◆ Capacity ◆ ◆ Correction Piping ◆...
  • Page 65 Notes...
  • Page 66 Notes...
  • Page 68 For more information: Sales and Technical Support: 1-855-DAIKIN1 www.daikincomfort.com or daikinac.com Daikin, and its design, VRV and REFNET are trademarks of Daikin Industries, Ltd. 2018 PM-DVRV 03-18...

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