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Variable Refrigeration Flow Systems Overview 10/11/2016

Executed by

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Data Power Technology Illinois

“Aggressively, relentlessly anticipating and exceeding our customer’s and client’s expectations every day, while always building trust.”

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Agenda What is VRF VRF Components Condensing Units Fan Coil Units Branch Selector Boxes Controllers Specialties

Application overview Layouts Condensing Unit Options

Ventilation Air Energy Efficiency and Savings

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What is VRF “Air conditioning on a dimmer switch” DC inverter driven compressor with load matching

software algorithm that varies the output to match multiple fan coil unit capacity demands.

Pulse modulated electronic expansion valves control refrigerant flow through evaporator coil.

Branch controller unit changes flow of refrigerant based on the demands of the space.

Transfers energy through refrigerant allowing for heat recovery during simultaneous mode operation.

Extremely efficient in part load conditions.

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What is VRF? Heat Pump – 2 Pipe – All Heat or All Cool. Y branches Headers

Heat Recovery – 3 Pipe – Heat or Cool. Y branches Branch selector boxes

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Components Condensing Unit

Single, Dual, Triple frame Air Cooled Water Cooled 208-230V 3Phase 460V 3Phase

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Fan Coil Units Capacities from 0.5 to 8 Tons. Ducted. Non-Ducted. Ceiling, Wall, Floor mounting.

Air Processing Ducted Units. Ventilation Air.

208-230 Single Phase.

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Heat Pump System

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Simultaneous Cooling Based

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Simultaneous Heating Base

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Branch Selector Boxes Single Circuit Box Multiple Circuit Box

Home Run Multiple Circuit

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Controls Local- Room Controllers. Central Controllers. Integration Devices.

BACNet, Lon, Modbus. Digital input/output controllers. Dry Contacts.

Economizer control. Occupancy sensors. Auxiliary heat control.

Power consumption metering.

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Specialties Special purpose fan coil units Water Heating/cooling. Domestic hot water (with 3rd party HX

tank). In Floor / sidewalk snow melt, radiator.

3rd Party AHU Integration VRF Condensing unit connects to AHU coils

providing capacity control. Part of VRF system or stand alone.

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Application Overview Office Space

9,600 Sqft. 30 Zones.

Office. Conference.

Room.

Individual zone control.

Simultaneous heating and cooling.

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RTU-VAV

(5) Packaged RTU Gas Fired DX Cooling

(30) VAV SCR Electric

Heat

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VRF Cassette (30) 4-Way

Ceiling Cassette Ventilation Air

required. Heat Recovery. Independent

zone control.

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Home Run Heat Recovery Centrally Located

Branch Selector. Rigid ACR from CU

to HR/BS box. Soft Copper Line

Sets from HR/BS box to Fan Coil.

208-230V 1Ph connections on HR/BS and IDU.

BS/HR Condensate drainage needed.

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Single Circuit Heat Recovery Zone located

HR/BS boxes. Rigid ACR from CU

to HR/BS box (3 Pipe)..

Soft Copper Line Sets from HR/BS box to Fan Coil.

208-230V 1Ph connections on HR/BS and IDU.

BS/HR Condensate drainage NOT needed.

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Multiple Circuit Heat Recovery Zone or Centrally

Located HR/BS boxes.

Rigid ACR from CU to HR/BS box.

Soft Copper Line Sets from HR/BS box to Fan Coil.

208-230V 1Ph connections on HR/BS and IDU.

BS/HR Condensate drainage NOT needed.

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Condensing Unit Options Air Cooled

Ranges from -13°F to 65F° heating mode. Cooling range from 14°F to 118°F. Cooling down to -9.9°F with low ambient kit.

Capacity decreases in heating mode as outdoor ambient temperature drops below 14°F.

Requires defrost. Can be placed in enclosure.

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Outdoor Placement- Air Cooled

Account for Snow Fall. Access for maintenance. Prevailing Winds.

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Placement in enclosures

Inlet and Outlet Louvers and Dampers with Bypass Damper System.

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Water Cooled Condensing Unit

EWT Ranges down to 23°F.

Loss of nominal capacity with Glycol .

Closed Loop Geothermal

Open Loop HX Required

Indoor Installation

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Ventilation Air Refer to ASHRAE Standard 62.1 2016 Ventilation for

acceptable indoor air quality. https://www.ashrae.org/resources--publications/bookstore/standards-62-1--62-2

Ventilation air can be direct or decoupled from the VRF fan coil units.

Examples of Ventilation air systems DOAS with an energy recovery wheel. DOAS with an energy recovery core. ERV/HRV. VRF outdoor air processing unit.

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Energy Efficiency Measured in IEER. AHRI Standard 1230-2010 with

Addendum 2 Integrated Energy Efficiency Ratio Measured in EER, IEER, SCHE and COP for Heating. https://www.ahridirectory.org/ahridirectory/pages/vr

fhp/defaultSearch.aspx Elimination of duct losses estimated at 10-20% airflow in

some systems Variable speed compressor spends most of it’s time

between 40-80% Estimated 30-35% savings in annual operation costs vs

VAV systems

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Questions

Thank you! Steven Blanchard

Data Power Technology Illinois 8105 N University St, Peoria, IL 61615

Sblanchard@DPTMechanical.com 309-692-2685 515-491-4478

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Thank You References

http://www.gsa.gov/portal/mediaId/197399/fileName/GPG_Variable_Refrigerant_Flow_12-2012.action

https://www.ashrae.org/resources--publications/bookstore/standards-62-1--62-2 ASHRAE Journal. April 2007. Variable Refrigerant Flow Systems, By William Goetzler. http://www.lg-vrf.com/ http://www.mitsubishipro.com/ https://www.daikin.com/products/ac/lineup/vrv/ http://www.airstagevrf.com/ http://york-vrf.com/ http://www.ahrinet.org/App_Content/ahri/files/Certification/OM%20pdfs/VRF_OM.pdf http://www.ahrinet.org/App_Content/ahri/files/STANDARDS/ANSI/ANSI_AHRI_Standard

_1230_2010_with_Add_2.pdf http://www.achrnews.com/articles/125139-the-science-of-hvac-efficiency-ratings